Locate My Device is an application miming Google's Find My Device – through SMS. It can help you to locate a lost smartphone.
How it works? Simply send an SMS to the device you want to locate in order to retrieve information about it. The SMS must consist of the configured activation command, a password and an instruction – e.g. "locate" if you want the coordinates, "battery" for some battery details, "ring" to make it ring – or "lock" to lock it down.
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/src/app/src/test/java/com/xfarrow/locatemydevice/ExampleUnitTest.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import org.junit.Test;
4 |
5 | import static org.junit.Assert.*;
6 |
7 | /**
8 | * Example local unit test, which will execute on the development machine (host).
9 | *
10 | * @see Testing documentation
11 | */
12 | public class ExampleUnitTest {
13 | @Test
14 | public void addition_isCorrect() {
15 | assertEquals(4, 2 + 2);
16 | }
17 | }
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/src/app/src/main/res/xml/backup_rules.xml:
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/src/.idea/deploymentTargetDropDown.xml:
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/src/app/src/main/java/com/xfarrow/locatemydevice/AppInfoActivity.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import androidx.appcompat.app.AppCompatActivity;
4 |
5 | import android.os.Bundle;
6 | import android.widget.TextView;
7 |
8 | public class AppInfoActivity extends AppCompatActivity {
9 |
10 | @Override
11 | protected void onCreate(Bundle savedInstanceState) {
12 | super.onCreate(savedInstanceState);
13 | setContentView(R.layout.activity_app_info);
14 |
15 | TextView appVersionTextView = findViewById(R.id.appversionTextView);
16 | appVersionTextView.setText("App version: " + BuildConfig.VERSION_NAME);
17 | }
18 | }
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/src/app/src/main/res/xml/data_extraction_rules.xml:
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/src/.idea/gradle.xml:
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/src/app/proguard-rules.pro:
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1 | # Add project specific ProGuard rules here.
2 | # You can control the set of applied configuration files using the
3 | # proguardFiles setting in build.gradle.
4 | #
5 | # For more details, see
6 | # http://developer.android.com/guide/developing/tools/proguard.html
7 |
8 | # If your project uses WebView with JS, uncomment the following
9 | # and specify the fully qualified class name to the JavaScript interface
10 | # class:
11 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview {
12 | # public *;
13 | #}
14 |
15 | # Uncomment this to preserve the line number information for
16 | # debugging stack traces.
17 | #-keepattributes SourceFile,LineNumberTable
18 |
19 | # If you keep the line number information, uncomment this to
20 | # hide the original source file name.
21 | #-renamesourcefileattribute SourceFile
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/src/app/src/main/res/values/themes.xml:
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/src/app/src/main/res/values-night/themes.xml:
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/src/app/src/main/res/layout/activity_ringer.xml:
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/src/app/src/androidTest/java/com/xfarrow/locatemydevice/ExampleInstrumentedTest.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import android.content.Context;
4 |
5 | import androidx.test.platform.app.InstrumentationRegistry;
6 | import androidx.test.ext.junit.runners.AndroidJUnit4;
7 |
8 | import org.junit.Test;
9 | import org.junit.runner.RunWith;
10 |
11 | import static org.junit.Assert.*;
12 |
13 | /**
14 | * Instrumented test, which will execute on an Android device.
15 | *
16 | * @see Testing documentation
17 | */
18 | @RunWith(AndroidJUnit4.class)
19 | public class ExampleInstrumentedTest {
20 | @Test
21 | public void useAppContext() {
22 | // Context of the app under test.
23 | Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
24 | assertEquals("com.xfarrow.locatemydevice", appContext.getPackageName());
25 | }
26 | }
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/src/app/src/main/res/layout/activity_whitelist_contacts.xml:
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/src/app/src/main/java/com/xfarrow/locatemydevice/CipherUtils.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import java.math.BigInteger;
4 | import java.nio.charset.StandardCharsets;
5 | import java.security.MessageDigest;
6 | import java.security.NoSuchAlgorithmException;
7 |
8 | public class CipherUtils {
9 | // Return SHA-256 hash if possible, plaintext otherwise
10 | public static String get256Sha(String string) {
11 | try {
12 | MessageDigest md = MessageDigest.getInstance("SHA-256");
13 | byte[] hash = md.digest(string.getBytes(StandardCharsets.UTF_8));
14 | BigInteger number = new BigInteger(1, hash);
15 | StringBuilder hexString = new StringBuilder(number.toString(16));
16 | while (hexString.length() < 64) {
17 | hexString.insert(0, '0');
18 | }
19 | return hexString.toString();
20 | } catch(NoSuchAlgorithmException ex){
21 | return string;
22 | }
23 |
24 | }
25 |
26 | }
27 |
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/src/.idea/misc.xml:
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/src/app/src/main/res/layout/activity_show_message.xml:
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/src/app/build.gradle:
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1 | plugins {
2 | id 'com.android.application'
3 | }
4 |
5 | android {
6 | compileSdk 33
7 |
8 | defaultConfig {
9 | applicationId "com.xfarrow.locatemydevice"
10 | minSdk 28
11 | targetSdk 33
12 | versionCode 6
13 | versionName "1.1-beta"
14 |
15 | testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
16 | }
17 |
18 | buildTypes {
19 | release {
20 | minifyEnabled false
21 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
22 | }
23 | }
24 | compileOptions {
25 | sourceCompatibility JavaVersion.VERSION_1_8
26 | targetCompatibility JavaVersion.VERSION_1_8
27 | }
28 | buildFeatures {
29 | viewBinding true
30 | }
31 | }
32 |
33 | dependencies {
34 | implementation 'androidx.appcompat:appcompat:1.5.1'
35 | implementation 'com.google.android.material:material:1.7.0'
36 | implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
37 | implementation 'com.googlecode.libphonenumber:libphonenumber:8.12.57'
38 |
39 | }
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/src/app/src/main/res/drawable-anydpi/settings.xml:
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/src/gradle.properties:
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1 | # Project-wide Gradle settings.
2 | # IDE (e.g. Android Studio) users:
3 | # Gradle settings configured through the IDE *will override*
4 | # any settings specified in this file.
5 | # For more details on how to configure your build environment visit
6 | # http://www.gradle.org/docs/current/userguide/build_environment.html
7 | # Specifies the JVM arguments used for the daemon process.
8 | # The setting is particularly useful for tweaking memory settings.
9 | org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
10 | # When configured, Gradle will run in incubating parallel mode.
11 | # This option should only be used with decoupled projects. More details, visit
12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
13 | # org.gradle.parallel=true
14 | # AndroidX package structure to make it clearer which packages are bundled with the
15 | # Android operating system, and which are packaged with your app"s APK
16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn
17 | android.useAndroidX=true
18 | # Enables namespacing of each library's R class so that its R class includes only the
19 | # resources declared in the library itself and none from the library's dependencies,
20 | # thereby reducing the size of the R class for that library
21 | android.nonTransitiveRClass=true
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/src/app/src/main/res/layout/activity_main.xml:
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/src/app/src/main/java/com/xfarrow/locatemydevice/ShowMessageActivity.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import android.annotation.SuppressLint;
4 | import android.os.Build;
5 | import android.os.Bundle;
6 | import androidx.appcompat.app.AppCompatActivity;
7 | import android.view.WindowManager;
8 | import android.widget.TextView;
9 |
10 | public class ShowMessageActivity extends AppCompatActivity {
11 |
12 | private TextView textToDisplay;
13 |
14 | @Override
15 | protected void onCreate(Bundle savedInstanceState) {
16 | super.onCreate(savedInstanceState);
17 | setContentView(R.layout.activity_show_message);
18 | showOnLockscreen();
19 | setViews();
20 | String messageToDisplay = getData();
21 | textToDisplay.setText(messageToDisplay);
22 | }
23 |
24 | // https://stackoverflow.com/questions/35356848/android-how-to-launch-activity-over-lock-screen
25 | @SuppressLint("ObsoleteSdkInt")
26 | private void showOnLockscreen(){
27 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1)
28 | {
29 | setShowWhenLocked(true);
30 | setTurnScreenOn(true);
31 | }
32 | else
33 | {
34 | getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
35 | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
36 | }
37 | }
38 |
39 | private String getData(){
40 | Bundle extras = getIntent().getExtras();
41 | if (extras != null) {
42 | return extras.getString(Utils.SHOW_MESSAGE_OPTION);
43 | }
44 | return null;
45 | }
46 |
47 | private void setViews(){
48 | textToDisplay = findViewById(R.id.text_to_display);
49 | }
50 |
51 | }
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/src/app/src/main/res/drawable-v24/ic_launcher_foreground.xml:
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/src/app/src/main/java/com/xfarrow/locatemydevice/Settings.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import android.content.Context;
4 | import android.content.SharedPreferences;
5 |
6 | public class Settings {
7 | public static final int PASSWORD = 0;
8 | public static final int SMS_COMMAND = 1;
9 | /* integer 2 was used for WHITE_LIST_ENABLED till 1.0.4 as string, now it's a boolean
10 | ** so using WHITELIST_ENABLED = 2 might make devices crash.
11 | */
12 | public static final int WHITELIST_ENABLED = 3;
13 | public static final int DO_NOT_SHOW_OVERLAY_PERMISSION_AGAIN = 4;
14 | public static final int DO_NOT_SHOW_DEVICE_ADMIN_PERMISSION_AGAIN = 5;
15 |
16 | private final SharedPreferences sharedPreferences;
17 |
18 | public Settings(Context context){
19 | sharedPreferences = context.getSharedPreferences("locatemydevice.settings", Context.MODE_PRIVATE);
20 | }
21 |
22 | public void setString(int setting, String value){
23 | SharedPreferences.Editor editor = sharedPreferences.edit();
24 | editor.putString(String.valueOf(setting), value);
25 | editor.apply();
26 | }
27 |
28 | public void setBoolean(int setting, boolean value){
29 | SharedPreferences.Editor editor = sharedPreferences.edit();
30 | editor.putBoolean(String.valueOf(setting), value);
31 | editor.apply();
32 | }
33 |
34 | public String getString(int setting){
35 | return sharedPreferences.getString(String.valueOf(setting), (String)defaultValues(setting));
36 | }
37 |
38 | public boolean getBoolean(int setting){
39 | return sharedPreferences.getBoolean(String.valueOf(setting), (Boolean)defaultValues(setting));
40 | }
41 |
42 | public Object defaultValues(int setting){
43 | switch (setting){
44 | case PASSWORD:
45 | return CipherUtils.get256Sha("0000");
46 | case SMS_COMMAND:
47 | return "LMD";
48 | case WHITELIST_ENABLED:
49 | case DO_NOT_SHOW_OVERLAY_PERMISSION_AGAIN:
50 | case DO_NOT_SHOW_DEVICE_ADMIN_PERMISSION_AGAIN:
51 | return false;
52 | }
53 | return null;
54 | }
55 | }
56 |
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/src/app/src/main/res/layout/activity_app_info.xml:
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/src/app/src/main/res/values/strings.xml:
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1 |
2 | Locate my device
3 | SMS command
4 | Choose a command to initialize the conversation with the smartphone
5 | Password
6 | Choose a password
7 | Enter password
8 | Whitelist
9 | Enabled
10 | Only contacts in the whitelist are allowed to communicate with this smartphone
11 | Whitelist contacts
12 | Info
13 | Click here for more info
14 | App version:
15 | This software is open source and licensed under GPLv3\n\nSource code and instructions at\nhttps://www.github.com/xfarrow/locatemydevice
16 | Locate my device is running
17 | Display over other apps
18 | Please, enable \'Display over other apps\' permission. It is required for using the options \'callme\' and \'show\'
19 | Cancel
20 | The app requires this permission to provide the \'lock\' feature.
21 | Cannot use a blank password. Aborted.
22 | Empty SMS command not allowed, reverted to default (LMD)
23 | Long click to delete
24 | Contact already in the list
25 | Unable to retrieve contact. Are you using a third-party contact manager app? If so, try with the default one.
26 | Add contact
27 | Type a phone number
28 | Choose from contacts
29 | This number does not appear to be valid
30 | Settings
31 | Permissions
32 | App\'s permission
33 | Location
34 | Device administrator
35 | Calls
36 | Auto-enabling location
37 | Don\'t show again
38 | Open app settings
39 |
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/src/gradlew.bat:
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1 | @rem
2 | @rem Copyright 2015 the original author or authors.
3 | @rem
4 | @rem Licensed under the Apache License, Version 2.0 (the "License");
5 | @rem you may not use this file except in compliance with the License.
6 | @rem You may obtain a copy of the License at
7 | @rem
8 | @rem https://www.apache.org/licenses/LICENSE-2.0
9 | @rem
10 | @rem Unless required by applicable law or agreed to in writing, software
11 | @rem distributed under the License is distributed on an "AS IS" BASIS,
12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 | @rem See the License for the specific language governing permissions and
14 | @rem limitations under the License.
15 | @rem
16 |
17 | @if "%DEBUG%" == "" @echo off
18 | @rem ##########################################################################
19 | @rem
20 | @rem Gradle startup script for Windows
21 | @rem
22 | @rem ##########################################################################
23 |
24 | @rem Set local scope for the variables with windows NT shell
25 | if "%OS%"=="Windows_NT" setlocal
26 |
27 | set DIRNAME=%~dp0
28 | if "%DIRNAME%" == "" set DIRNAME=.
29 | set APP_BASE_NAME=%~n0
30 | set APP_HOME=%DIRNAME%
31 |
32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter.
33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
34 |
35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
37 |
38 | @rem Find java.exe
39 | if defined JAVA_HOME goto findJavaFromJavaHome
40 |
41 | set JAVA_EXE=java.exe
42 | %JAVA_EXE% -version >NUL 2>&1
43 | if "%ERRORLEVEL%" == "0" goto execute
44 |
45 | echo.
46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
47 | echo.
48 | echo Please set the JAVA_HOME variable in your environment to match the
49 | echo location of your Java installation.
50 |
51 | goto fail
52 |
53 | :findJavaFromJavaHome
54 | set JAVA_HOME=%JAVA_HOME:"=%
55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
56 |
57 | if exist "%JAVA_EXE%" goto execute
58 |
59 | echo.
60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
61 | echo.
62 | echo Please set the JAVA_HOME variable in your environment to match the
63 | echo location of your Java installation.
64 |
65 | goto fail
66 |
67 | :execute
68 | @rem Setup the command line
69 |
70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
71 |
72 |
73 | @rem Execute Gradle
74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
75 |
76 | :end
77 | @rem End local scope for the variables with windows NT shell
78 | if "%ERRORLEVEL%"=="0" goto mainEnd
79 |
80 | :fail
81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
82 | rem the _cmd.exe /c_ return code!
83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
84 | exit /b 1
85 |
86 | :mainEnd
87 | if "%OS%"=="Windows_NT" endlocal
88 |
89 | :omega
90 |
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/src/app/src/main/java/com/xfarrow/locatemydevice/RingerActivity.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import androidx.appcompat.app.AppCompatActivity;
4 |
5 | import android.annotation.SuppressLint;
6 | import android.content.Context;
7 | import android.media.Ringtone;
8 | import android.media.RingtoneManager;
9 | import android.net.Uri;
10 | import android.os.Build;
11 | import android.os.Bundle;
12 | import android.os.VibrationEffect;
13 | import android.os.Vibrator;
14 | import android.view.View;
15 | import android.view.WindowManager;
16 | import android.widget.Button;
17 |
18 | public class RingerActivity extends AppCompatActivity {
19 |
20 | private Ringtone ringtoneManager;
21 | private Vibrator vibrator;
22 | @Override
23 | protected void onCreate(Bundle savedInstanceState) {
24 | super.onCreate(savedInstanceState);
25 | setContentView(R.layout.activity_ringer);
26 | showOnLockscreen();
27 | setViews();
28 | startRinging();
29 | }
30 |
31 | // https://stackoverflow.com/questions/35356848/android-how-to-launch-activity-over-lock-screen
32 | @SuppressLint("ObsoleteSdkInt")
33 | private void showOnLockscreen(){
34 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1)
35 | {
36 | setShowWhenLocked(true);
37 | setTurnScreenOn(true);
38 | }
39 | else
40 | {
41 | getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
42 | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
43 | }
44 | }
45 |
46 | private void setViews(){
47 | Button stopButton = findViewById(R.id.stopButton);
48 |
49 | stopButton.setOnClickListener(new View.OnClickListener() {
50 | @Override
51 | public void onClick(View v) {
52 | stopRinging();
53 | }
54 | });
55 | }
56 |
57 | private void startRinging(){
58 | Uri ringtone = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
59 | ringtoneManager = RingtoneManager.getRingtone(this, ringtone);
60 | ringtoneManager.setVolume(1f);
61 | ringtoneManager.play();
62 |
63 | vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
64 |
65 | // Start without a delay
66 | // Vibrate for 500 milliseconds
67 | // Sleep for 500 milliseconds
68 | long[] pattern = {0, 500, 500};
69 | // The '0' here means to repeat indefinitely
70 | // '0' is actually the index at which the pattern keeps repeating from (the start)
71 | // To repeat the pattern from any other point, you could increase the index, e.g. '1'
72 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
73 | vibrator.vibrate(VibrationEffect.createWaveform(pattern, 0));
74 | }
75 | else{
76 | vibrator.vibrate(pattern,0);
77 | }
78 | }
79 |
80 | private void stopRinging(){
81 | ringtoneManager.stop();
82 | vibrator.cancel();
83 | finishAndRemoveTask();
84 | }
85 |
86 | @Override
87 | public void onBackPressed(){
88 | stopRinging();
89 | }
90 | }
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/src/app/src/main/res/values-it-rIT/strings.xml:
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1 |
2 |
3 | Comando SMS
4 | Scegli un comando con cui inizializzare la conversazione con lo smartphone
5 | Scegli una password
6 | Inserisci password
7 | Lista bianca
8 | Abilitata
9 | Solo i contatti nella lista bianca sono autorizzati a comunicare con questo smartphone
10 | Contatti in lista bianca
11 | Info
12 | Clicca qui per più info
13 | Password
14 | Versione app:
15 | Questo software è open source ed è sotto licenza GPLv3\n\nCodice sorgente ed istruzioni a\nhttps://www.github.com/xfarrow/locatemydevice
16 | Trova il mio dispositivo
17 | Trova il mio dispositivo è in esecuzione
18 | Mostra sulle altre app
19 | Per favore, abilita l\'opzione \'mostra sulle altre app\'. Ciò è richiesto per le opzioni \'callme\' e \'show\'
20 | Annulla
21 | L\'app richiede questo permesso per utilizzare l\'opzione \'lock\'
22 | Non è possibile usare una password vuota. Operazione annullata.
23 | Non è consentito usare un comando SMS vuoto. Ripristinato il valore di default (LMD)
24 | Click prolungato per cancellare
25 | Contatto già presente nella lista
26 | Impossibile recuperare il contatto. Stai per caso usando un gestore contatti di terze parti? Se così fosse, prova a usare quello di default
27 | Aggiungi un contatto
28 | Inserisci un numero di telefono
29 | Scegli dai contatti
30 | Questo numero non appare essere valido
31 | Impostazioni
32 | Permessi
33 | Permessi dell\'app
34 | Posizione
35 | Amministratore dispositivo
36 | Chiamate
37 | Attivazione localizzazione automatica
38 | Non mostrare di nuovo
39 | Apri impostazioni app
40 |
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/src/app/src/main/java/com/xfarrow/locatemydevice/SmsReceiver.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import android.content.BroadcastReceiver;
4 | import android.content.Context;
5 | import android.content.Intent;
6 | import android.os.Build;
7 | import android.os.Bundle;
8 | import android.telephony.SmsMessage;
9 | import android.util.Log;
10 | import android.widget.Toast;
11 |
12 | public class SmsReceiver extends BroadcastReceiver {
13 | // https://www.vogella.com/tutorials/AndroidBroadcastReceiver/article.html
14 | // This method gets fired as soon as it receives an SMS.
15 | @Override
16 | public void onReceive(Context context, Intent intent) {
17 | /* Consider using a WorkManager: https://developer.android.com/topic/performance/vitals/anr#slow_broadcast_receivers
18 | * because the maximum BroadcastReceiver lifespan is 10seconds https://developer.android.com/training/articles/perf-anr.html
19 | */
20 | if (intent.getAction().equals("android.provider.Telephony.SMS_RECEIVED")) {
21 | Bundle bundle = intent.getExtras();
22 | if (bundle != null) {
23 | // get sms objects
24 | Object[] pdus = (Object[]) bundle.get("pdus");
25 | if (pdus.length == 0) {
26 | return;
27 | }
28 | String format = bundle.getString("format");
29 | // large message might be broken into many
30 | SmsMessage[] messages = new SmsMessage[pdus.length];
31 | StringBuilder sb = new StringBuilder();
32 | for (int i = 0; i < pdus.length; i++) {
33 | messages[i] = SmsMessage.createFromPdu((byte[]) pdus[i], format);
34 | sb.append(messages[i].getMessageBody());
35 | }
36 | // getOriginatingAddress() will always be the same in messages[X] for 0<=X getAllContacts() {
57 | ArrayList array_list = new ArrayList<>();
58 | SQLiteDatabase db = this.getReadableDatabase();
59 | String query = String.format("SELECT %s FROM %s", KEY_PH_NO, TABLE_CONTACTS);
60 | Cursor cursor = db.rawQuery( query, null );
61 | cursor.moveToFirst();
62 |
63 | int columnIndex = cursor.getColumnIndex(KEY_PH_NO);
64 |
65 | while(!cursor.isAfterLast()){
66 | array_list.add(cursor.getString(columnIndex));
67 | cursor.moveToNext();
68 | }
69 | cursor.close();
70 | return array_list;
71 | }
72 |
73 | /*
74 | * Checks if a contact is already in the database.
75 | *
76 | * If a phoneNumber with an international country code is provided, checks if exists the same
77 | * number without the country code. This is very useful if the user stores in the whitelist a
78 | * number without the international country code because it'll be checked against the SMS sender's
79 | * number obtained from the Broadcast, always containing an international country code.
80 | *
81 | * This might introduce a security risk: if the user saves the following number: 12345
82 | * then it will accept communications from +1 12345, +2 12345, +3 12345 and so on...
83 | * but we do not know what international prefix the regional "12345" has. The alternative would
84 | * be to deny accepting local phone numbers.
85 | */
86 | public boolean isContactPresent(String phoneNo){
87 | SQLiteDatabase db = this.getWritableDatabase();
88 | // SELECT KEY_PH_NO FROM TABLE_CONTACTS WHERE KEY_PH_NO = "phoneNo" OR KEY_PH_NO = "phoneNumberWithoutPrefix"
89 | String query = String.format("SELECT %s FROM %s WHERE %s = \"%s\"",
90 | KEY_PH_NO,
91 | TABLE_CONTACTS,
92 | KEY_PH_NO,
93 | phoneNo
94 | );
95 |
96 | String countryCode = Utils.extractCountryCodeFromPhoneNumber(phoneNo);
97 | if(countryCode != null){
98 | String phoneNumberWithoutPrefix = phoneNo.replace("+", "").replace(countryCode, "");
99 | query += String.format(" OR %s = \"%s\"",
100 | KEY_PH_NO,
101 | phoneNumberWithoutPrefix);
102 | }
103 |
104 | Cursor cursor = db.rawQuery(query, null);
105 | int count = cursor.getCount();
106 | cursor.close();
107 | return count > 0;
108 | }
109 | }
110 |
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/src/app/src/main/AndroidManifest.xml:
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/src/app/src/main/java/com/xfarrow/locatemydevice/Utils.java:
--------------------------------------------------------------------------------
1 | package com.xfarrow.locatemydevice;
2 |
3 | import android.Manifest;
4 | import android.annotation.SuppressLint;
5 | import android.content.Context;
6 | import android.content.pm.PackageManager;
7 | import android.os.Build;
8 | import android.telephony.SmsManager;
9 | import androidx.annotation.Nullable;
10 | import androidx.core.app.ActivityCompat;
11 |
12 | import com.google.i18n.phonenumbers.NumberParseException;
13 | import com.google.i18n.phonenumbers.PhoneNumberUtil;
14 | import com.google.i18n.phonenumbers.Phonenumber;
15 | import java.util.ArrayList;
16 | import java.util.Locale;
17 |
18 | public class Utils {
19 |
20 | public static final int PERMISSION_MULTIPLE = 100;
21 | public static final int PERMISSION_ACCESS_BACKGROUND_LOCATION = 101;
22 | public static final int PERMISSION_CALLS = 103;
23 |
24 |
25 | public static final String LOCATE_OPTION = "locate";
26 | public static final String CELLULAR_INFO_OPTION = "cellinfo";
27 | public static final String BATTERY_OPTION = "battery";
28 | public static final String CALL_ME_OPTION = "callme";
29 | public static final String WIFI_OPTION = "wifi";
30 | public static final String LOCK_OPTION = "lock";
31 | public static final String SHOW_MESSAGE_OPTION = "show";
32 | public static final String RING_OPTION = "ring";
33 | public static final String ON_SUBOPTION = "-on";
34 | public static final String OFF_SUBOPTION = "-off";
35 |
36 | public static String getCountryNameByIso(String iso){
37 | Locale locale = new Locale("", iso);
38 | return locale.getDisplayCountry();
39 | }
40 |
41 | public static void sendSms(SmsManager smsManager, String text, String sendTo){
42 | ArrayList parts = smsManager.divideMessage(text);
43 | smsManager.sendMultipartTextMessage (sendTo, null, parts,null, null);
44 | }
45 |
46 | public static String buildCoordinatesResponse(double latitude, double longitude){
47 | return new StringBuilder().append("Coordinates are:")
48 | .append("\nLatitude: ")
49 | .append(latitude)
50 | .append("\nLongitude: ")
51 | .append(longitude)
52 | .append("\n")
53 | .append("https://www.openstreetmap.org/?mlat=").append(latitude).append("&mlon=").append(longitude).toString();
54 | }
55 |
56 | // returns the country code from a phone number. For example +393340000000 will return "39"
57 | @Nullable
58 | public static String extractCountryCodeFromPhoneNumber(String phoneNumber){
59 | PhoneNumberUtil phoneUtil = PhoneNumberUtil.getInstance();
60 | Phonenumber.PhoneNumber numberProto;
61 | try {
62 | numberProto = phoneUtil.parse(phoneNumber, "");
63 | } catch (NumberParseException e) {
64 | return null;
65 | }
66 | return String.valueOf(numberProto.getCountryCode());
67 | }
68 |
69 | // We'll remove parenthesis, dashes and whitespaces
70 | public static String normalizePhoneNumber(String phoneNo){
71 | return phoneNo.replaceAll("[-()\\s]", "");
72 | }
73 |
74 | // forcefully toggle location services on (secure setting - needs permission to be granted via adb)
75 | @SuppressLint("ObsoleteSdkInt")
76 | public static boolean toggleLocationOn(Context context){
77 |
78 | if (Build.VERSION.SDK_INT < 19) {
79 | return false;
80 | }
81 |
82 | if(ActivityCompat.checkSelfPermission(context, Manifest.permission.WRITE_SECURE_SETTINGS) != PackageManager.PERMISSION_GRANTED){
83 | return false;
84 | }
85 |
86 | return android.provider.Settings.Secure.putInt(context.getContentResolver(),
87 | android.provider.Settings.Secure.LOCATION_MODE,
88 | android.provider.Settings.Secure.LOCATION_MODE_HIGH_ACCURACY);
89 |
90 | }
91 |
92 | // forcefully toggle location services off (secure setting - needs permission to be granted via adb)
93 | @SuppressLint("ObsoleteSdkInt")
94 | public static boolean toggleLocationOff(Context context){
95 |
96 | if (Build.VERSION.SDK_INT < 19) {
97 | return false;
98 | }
99 |
100 | if(ActivityCompat.checkSelfPermission(context, Manifest.permission.WRITE_SECURE_SETTINGS) != PackageManager.PERMISSION_GRANTED){
101 | return false;
102 | }
103 |
104 | return android.provider.Settings.Secure.putInt(context.getContentResolver(),
105 | android.provider.Settings.Secure.LOCATION_MODE,
106 | android.provider.Settings.Secure.LOCATION_MODE_OFF);
107 | }
108 | }
109 |
--------------------------------------------------------------------------------
/src/app/src/main/java/com/xfarrow/locatemydevice/PermissionsActivity.java:
--------------------------------------------------------------------------------
1 | package com.xfarrow.locatemydevice;
2 |
3 | import androidx.appcompat.app.AppCompatActivity;
4 | import androidx.core.app.ActivityCompat;
5 |
6 | import android.Manifest;
7 | import android.annotation.SuppressLint;
8 | import android.app.admin.DevicePolicyManager;
9 | import android.content.ComponentName;
10 | import android.content.Intent;
11 | import android.content.pm.PackageManager;
12 | import android.net.Uri;
13 | import android.os.Build;
14 | import android.os.Bundle;
15 | import android.view.View;
16 | import android.widget.Button;
17 | import android.widget.Switch;
18 |
19 | public class PermissionsActivity extends AppCompatActivity {
20 |
21 | @SuppressLint("UseSwitchCompatOrMaterialCode")
22 | private Switch locationSwitch;
23 | @SuppressLint("UseSwitchCompatOrMaterialCode")
24 | private Switch overlaySwitch;
25 | @SuppressLint("UseSwitchCompatOrMaterialCode")
26 | private Switch deviceAdminSwitch;
27 | @SuppressLint("UseSwitchCompatOrMaterialCode")
28 | private Switch callsSwitch;
29 | @SuppressLint("UseSwitchCompatOrMaterialCode")
30 | private Switch autoEnablingLocationSwitch;
31 | @SuppressLint("UseSwitchCompatOrMaterialCode")
32 | private Switch smsSwitch;
33 | private Button openPermissionScreenButton;
34 |
35 | @Override
36 | protected void onCreate(Bundle savedInstanceState) {
37 | super.onCreate(savedInstanceState);
38 | setContentView(R.layout.activity_permissions);
39 |
40 | setTitle(R.string.permissions);
41 | setViews();
42 | setValues();
43 | setListeners();
44 | }
45 |
46 | private void setViews(){
47 | locationSwitch = findViewById(R.id.location_permission_switch);
48 | overlaySwitch = findViewById(R.id.overlay_permission_switch);
49 | deviceAdminSwitch = findViewById(R.id.device_administrator_permission_switch);
50 | callsSwitch = findViewById(R.id.calls_permission_switch);
51 | autoEnablingLocationSwitch = findViewById(R.id.autoEnablingLocationSwitch);
52 | smsSwitch = findViewById(R.id.sms_permission_switch);
53 | openPermissionScreenButton = findViewById(R.id.open_permission_screen_button);
54 | }
55 |
56 | @SuppressLint("ObsoleteSdkInt")
57 | private void setValues(){
58 |
59 | // sms
60 | if (ActivityCompat.checkSelfPermission(this, Manifest.permission.RECEIVE_SMS) != PackageManager.PERMISSION_GRANTED
61 | || ActivityCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {
62 | smsSwitch.setChecked(false);
63 | }
64 | else{
65 | smsSwitch.setChecked(true);
66 | }
67 | smsSwitch.setClickable(false);
68 |
69 | // location
70 | if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
71 | locationSwitch.setChecked(false);
72 | }
73 | else{
74 | locationSwitch.setChecked(true);
75 | }
76 | locationSwitch.setClickable(false);
77 |
78 | // overlay
79 | if(!android.provider.Settings.canDrawOverlays(this)) {
80 | overlaySwitch.setChecked(false);
81 | }
82 | else{
83 | overlaySwitch.setChecked(true);
84 | }
85 | overlaySwitch.setClickable(false);
86 |
87 |
88 | // device administrator
89 | ComponentName cn = new ComponentName(this, AdminReceiver.class);
90 | DevicePolicyManager mgr = (DevicePolicyManager)getSystemService(DEVICE_POLICY_SERVICE);
91 | if(!mgr.isAdminActive(cn)){
92 | deviceAdminSwitch.setChecked(false);
93 | }
94 | else{
95 | deviceAdminSwitch.setChecked(true);
96 | }
97 | deviceAdminSwitch.setClickable(false);
98 |
99 | // calls
100 | if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
101 | callsSwitch.setChecked(false);
102 | }
103 | else{
104 | callsSwitch.setChecked(true);
105 | }
106 | callsSwitch.setClickable(false);
107 |
108 | // auto-enabling location
109 | if (Build.VERSION.SDK_INT < 19 || ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_SECURE_SETTINGS) != PackageManager.PERMISSION_GRANTED) {
110 | autoEnablingLocationSwitch.setChecked(false);
111 | }
112 | else{
113 | autoEnablingLocationSwitch.setChecked(true);
114 | }
115 | autoEnablingLocationSwitch.setClickable(false);
116 | }
117 |
118 | private void setListeners(){
119 | openPermissionScreenButton.setOnClickListener(new View.OnClickListener() {
120 | @Override
121 | public void onClick(View v) {
122 | Intent intent = new Intent(android.provider.Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
123 | Uri uri = Uri.fromParts("package", getPackageName(), null);
124 | intent.setData(uri);
125 | startActivity(intent);
126 | }
127 | });
128 | }
129 |
130 | }
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # Locate My Device
2 | This app helps to locate a lost smartphone through the use of conventional SMS.
3 |
4 |
5 |
6 |
7 |
8 | ## Screenshots
9 | | Homescreen | SMS Chat
10 | |:-:|:-:|
11 | | | |
12 |
13 | ## Usage
14 | Send an SMS to the device you want to locate in order to retrieve information about it.
15 |
16 | **Synopsis**
17 |
18 | ```activation_command password option```
19 |
20 | **Default values**
21 |
22 | * The default value for ```activation_command``` is ```LMD```
23 | * The default value for ```password``` is ```0000```. It's highly encouraged to change it
24 |
25 | **Options**
26 | Option | Explaination | Required permission
27 | -------|:------------|--------------------|
28 | locate | Will return the most accurate set of coordinates possible and a link to them pinpointed to OpenStreetMap | Location
29 | cellinfo | Will return a set of uniquely identifiable information about cell towers near the phone. You can then put this information on [OpenCellId][1] to individuate the smartphone's approximate location | Location
30 | battery | Will return battery infos | None |
31 | lock | Will lock down the smartphone | Device Administrator |
32 | show "message" | Will show a message on the screen, even when it's locked. | Overlay |
33 | callme | You will receive a call from the lost smartphone | Calls, Overlay |
34 | wifi | Will return Wi-Fi infos | Location |
35 | wifi-on | Will enable Wi-Fi (Only API < 29) | None |
36 | wifi-off | Will disable Wi-Fi (Only API < 29) | None |
37 | ring | Will make the smartphone ring | Overlay |
38 |
39 | ### Auto enabling location (only 1.1-beta)
40 |
41 | The app is able to automatically enabe location if it is off, but you need to grant a specific permission through adb.
42 |
43 | To grant the permission you need to do the following:
44 | 1. Install ADB (https://developer.android.com/studio/releases/platform-tools.html)
45 | 2. Activate Developer options on your phone (https://developer.android.com/studio/debug/dev-options#enable)
46 | 3. In the Developer options enable USB debugging (https://developer.android.com/studio/debug/dev-options#debugging)
47 | 4. Connect your phone with your computer via USB
48 | 5. On your computer open a terminal, change to the directory where you extracted the platform tools and run the following command
49 |
50 | ```
51 | adb shell pm grant com.xfarrow.locatemydevice android.permission.WRITE_SECURE_SETTINGS
52 | ```
53 |
54 |
55 | ## Security
56 | ### Security measures in place
57 |
58 | This application manages sensitive data. As such, it strives to be as secure as possible. There are two walls to resist a potential malicious individual:
59 | * Password (mandatory): The default password is ```0000```. Change it to something more secure to enhance your protection. Furthermore, you probably know that SMS are not encrypted. This means that it is advised to change your password when you send to your smartphone messages containing it in order to deny access to attackers as soon as possible (unlikely and costly attack, yet let's try to prevent any displeasing scenario).
60 | * Whitelist (optional): Whitelist numbers are the only numbers that the app will accept communications from.
61 |
62 | ### Legit apks
63 | GitHub's releases section is the only place where I am uploading apks. Packages on F-Droid are compiled by the repo's owner.
64 |
65 | ### Antivirus' false positives
66 | Some antivirus falsely report it's a malware due to the app's extensive demanding permissions.
67 |
68 | ## More info
69 | There is already Google Find My Device, but I wanted to develop a free and open source alternative (even tho it is suggested to keep Google's, unless you do not have Play Services and/or wanting to go full-in about privacy). There is already a good FOSS alternative, [Find My Device](https://gitlab.com/Nulide/findmydevice) (from which I took inspiration from), but wanted to change it a little. I did [fork](https://www.github.com/xfarrow/FindMyDevice) it, but eventually decided to create my own project.
70 |
71 | **Other:**
72 | * This software is licensed under the GNU General Public License v3.0. Click [here](https://github.com/xfarrow/locatemydevice/blob/main/LICENSE) for more information;
73 | * As specified in the license, the software is provided "as is" with no warranty;
74 | * This software is not meant to be the only installed device locator. It is strongly advised to use it in conjunction with Google Find My Device; in fact it might suffer from a bug or might be unresponsive when you need it the most;
75 | * The logo has been provided to me for free by [Iconfinder](https://www.iconfinder.com/);
76 |
77 | ## Support
78 | If you enjoy this software, a little star is highly appreciated: it shows me people are interested in it.
79 |
80 | You can also donate if you want to, using the button below
81 |
82 |
83 |
84 | [1]: https://opencellid.org/
85 |
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/src/app/src/main/res/drawable/ic_launcher_background.xml:
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/src/gradlew:
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1 | #!/usr/bin/env sh
2 |
3 | #
4 | # Copyright 2015 the original author or authors.
5 | #
6 | # Licensed under the Apache License, Version 2.0 (the "License");
7 | # you may not use this file except in compliance with the License.
8 | # You may obtain a copy of the License at
9 | #
10 | # https://www.apache.org/licenses/LICENSE-2.0
11 | #
12 | # Unless required by applicable law or agreed to in writing, software
13 | # distributed under the License is distributed on an "AS IS" BASIS,
14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 | # See the License for the specific language governing permissions and
16 | # limitations under the License.
17 | #
18 |
19 | ##############################################################################
20 | ##
21 | ## Gradle start up script for UN*X
22 | ##
23 | ##############################################################################
24 |
25 | # Attempt to set APP_HOME
26 | # Resolve links: $0 may be a link
27 | PRG="$0"
28 | # Need this for relative symlinks.
29 | while [ -h "$PRG" ] ; do
30 | ls=`ls -ld "$PRG"`
31 | link=`expr "$ls" : '.*-> \(.*\)$'`
32 | if expr "$link" : '/.*' > /dev/null; then
33 | PRG="$link"
34 | else
35 | PRG=`dirname "$PRG"`"/$link"
36 | fi
37 | done
38 | SAVED="`pwd`"
39 | cd "`dirname \"$PRG\"`/" >/dev/null
40 | APP_HOME="`pwd -P`"
41 | cd "$SAVED" >/dev/null
42 |
43 | APP_NAME="Gradle"
44 | APP_BASE_NAME=`basename "$0"`
45 |
46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
48 |
49 | # Use the maximum available, or set MAX_FD != -1 to use that value.
50 | MAX_FD="maximum"
51 |
52 | warn () {
53 | echo "$*"
54 | }
55 |
56 | die () {
57 | echo
58 | echo "$*"
59 | echo
60 | exit 1
61 | }
62 |
63 | # OS specific support (must be 'true' or 'false').
64 | cygwin=false
65 | msys=false
66 | darwin=false
67 | nonstop=false
68 | case "`uname`" in
69 | CYGWIN* )
70 | cygwin=true
71 | ;;
72 | Darwin* )
73 | darwin=true
74 | ;;
75 | MINGW* )
76 | msys=true
77 | ;;
78 | NONSTOP* )
79 | nonstop=true
80 | ;;
81 | esac
82 |
83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
84 |
85 |
86 | # Determine the Java command to use to start the JVM.
87 | if [ -n "$JAVA_HOME" ] ; then
88 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
89 | # IBM's JDK on AIX uses strange locations for the executables
90 | JAVACMD="$JAVA_HOME/jre/sh/java"
91 | else
92 | JAVACMD="$JAVA_HOME/bin/java"
93 | fi
94 | if [ ! -x "$JAVACMD" ] ; then
95 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
96 |
97 | Please set the JAVA_HOME variable in your environment to match the
98 | location of your Java installation."
99 | fi
100 | else
101 | JAVACMD="java"
102 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
103 |
104 | Please set the JAVA_HOME variable in your environment to match the
105 | location of your Java installation."
106 | fi
107 |
108 | # Increase the maximum file descriptors if we can.
109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
110 | MAX_FD_LIMIT=`ulimit -H -n`
111 | if [ $? -eq 0 ] ; then
112 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
113 | MAX_FD="$MAX_FD_LIMIT"
114 | fi
115 | ulimit -n $MAX_FD
116 | if [ $? -ne 0 ] ; then
117 | warn "Could not set maximum file descriptor limit: $MAX_FD"
118 | fi
119 | else
120 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
121 | fi
122 | fi
123 |
124 | # For Darwin, add options to specify how the application appears in the dock
125 | if $darwin; then
126 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
127 | fi
128 |
129 | # For Cygwin or MSYS, switch paths to Windows format before running java
130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
131 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
132 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
133 |
134 | JAVACMD=`cygpath --unix "$JAVACMD"`
135 |
136 | # We build the pattern for arguments to be converted via cygpath
137 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
138 | SEP=""
139 | for dir in $ROOTDIRSRAW ; do
140 | ROOTDIRS="$ROOTDIRS$SEP$dir"
141 | SEP="|"
142 | done
143 | OURCYGPATTERN="(^($ROOTDIRS))"
144 | # Add a user-defined pattern to the cygpath arguments
145 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
146 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
147 | fi
148 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
149 | i=0
150 | for arg in "$@" ; do
151 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
152 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
153 |
154 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
155 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
156 | else
157 | eval `echo args$i`="\"$arg\""
158 | fi
159 | i=`expr $i + 1`
160 | done
161 | case $i in
162 | 0) set -- ;;
163 | 1) set -- "$args0" ;;
164 | 2) set -- "$args0" "$args1" ;;
165 | 3) set -- "$args0" "$args1" "$args2" ;;
166 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;;
167 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
168 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
169 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
170 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
171 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
172 | esac
173 | fi
174 |
175 | # Escape application args
176 | save () {
177 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
178 | echo " "
179 | }
180 | APP_ARGS=`save "$@"`
181 |
182 | # Collect all arguments for the java command, following the shell quoting and substitution rules
183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
184 |
185 | exec "$JAVACMD" "$@"
186 |
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/src/app/src/main/java/com/xfarrow/locatemydevice/SettingsActivity.java:
--------------------------------------------------------------------------------
1 | package com.xfarrow.locatemydevice;
2 |
3 | import android.annotation.SuppressLint;
4 | import android.content.DialogInterface;
5 | import android.content.Intent;
6 | import android.os.Bundle;
7 | import android.text.Editable;
8 | import android.text.TextWatcher;
9 | import android.text.method.PasswordTransformationMethod;
10 | import android.view.View;
11 | import android.widget.Button;
12 | import android.widget.CompoundButton;
13 | import android.widget.EditText;
14 | import android.widget.LinearLayout;
15 | import android.widget.Switch;
16 | import android.widget.Toast;
17 |
18 | import androidx.appcompat.app.AlertDialog;
19 | import androidx.appcompat.app.AppCompatActivity;
20 |
21 | public class SettingsActivity extends AppCompatActivity {
22 |
23 | private Button buttonEnterPin;
24 | private EditText editTextLmdCommand;
25 | @SuppressLint("UseSwitchCompatOrMaterialCode")
26 | private Switch whitelistSwitch;
27 | private Button addContactsButton;
28 | private Settings settings;
29 | private LinearLayout infoLinearLayout;
30 | private LinearLayout permissionsLinearLayout;
31 |
32 | @Override
33 | protected void onCreate(Bundle savedInstanceState) {
34 | super.onCreate(savedInstanceState);
35 | setContentView(R.layout.settings);
36 | settings = new Settings(this);
37 |
38 | setViews();
39 | setValues();
40 | setListeners();
41 | }
42 |
43 | private void setViews(){
44 | buttonEnterPin = findViewById(R.id.buttonEnterPassword);
45 | editTextLmdCommand = findViewById(R.id.editTextLmdCommand);
46 | whitelistSwitch = findViewById(R.id.SwitchWhitelist);
47 | addContactsButton = findViewById(R.id.buttonAddContacts);
48 | infoLinearLayout = findViewById(R.id.info_layout);
49 | permissionsLinearLayout = findViewById(R.id.permissions_layout);
50 |
51 | addContactsButton.setEnabled(settings.getBoolean(Settings.WHITELIST_ENABLED));
52 | whitelistSwitch.setChecked(settings.getBoolean(Settings.WHITELIST_ENABLED));
53 | }
54 |
55 | private void setValues(){
56 | editTextLmdCommand.setText(settings.getString(Settings.SMS_COMMAND));
57 | }
58 |
59 | private void setListeners(){
60 | buttonEnterPin.setOnClickListener(new View.OnClickListener() {
61 | @Override
62 | public void onClick(View v) {
63 | AlertDialog.Builder alert = new AlertDialog.Builder(SettingsActivity.this);
64 | alert.setTitle(R.string.password);
65 | alert.setMessage(R.string.choose_a_password);
66 | EditText input = new EditText(SettingsActivity.this);
67 | input.setTransformationMethod(new PasswordTransformationMethod());
68 | alert.setView(input);
69 |
70 | alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
71 | public void onClick(DialogInterface dialog, int whichButton) {
72 | String text = input.getText().toString();
73 | if (!text.isEmpty()) {
74 | settings.setString(Settings.PASSWORD, CipherUtils.get256Sha(text));
75 | }
76 | else{
77 | Toast.makeText(SettingsActivity.this, R.string.cannot_use_a_blank_password, Toast.LENGTH_LONG).show();
78 | }
79 | }
80 | });
81 |
82 | alert.setNeutralButton(R.string.cancel, new DialogInterface.OnClickListener() {
83 | @Override
84 | public void onClick(DialogInterface dialogInterface, int i) {
85 | dialogInterface.cancel();
86 | }
87 | });
88 |
89 | final AlertDialog dialog = alert.create();
90 | dialog.show();
91 |
92 | // Disable button "OK" if the PIN contains a space or it's empty.
93 | input.addTextChangedListener(new TextWatcher() {
94 | @Override
95 | public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
96 | dialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(
97 | !charSequence.toString().equals("") && !charSequence.toString().contains(" ")
98 | );
99 | }
100 |
101 | @Override
102 | public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}
103 | @Override
104 | public void afterTextChanged(Editable editable) {}
105 | });
106 | }
107 | });
108 |
109 | editTextLmdCommand.addTextChangedListener(new TextWatcher() {
110 | @Override
111 | public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
112 |
113 | @Override
114 | public void onTextChanged(CharSequence s, int start, int before, int count) {}
115 |
116 | @Override
117 | public void afterTextChanged(Editable s) {
118 | if (s.toString().isEmpty()) {
119 | Toast.makeText(SettingsActivity.this, R.string.empty_sms_command_not_allowed, Toast.LENGTH_LONG).show();
120 | settings.setString(Settings.SMS_COMMAND, (String)settings.defaultValues(Settings.SMS_COMMAND));
121 | } else {
122 | settings.setString(Settings.SMS_COMMAND, s.toString());
123 | }
124 | }
125 | });
126 |
127 | whitelistSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
128 | @Override
129 | public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
130 | addContactsButton.setEnabled(isChecked);
131 | settings.setBoolean(Settings.WHITELIST_ENABLED, isChecked);
132 | }
133 | });
134 |
135 | addContactsButton.setOnClickListener(new View.OnClickListener() {
136 | @Override
137 | public void onClick(View v) {
138 | Intent myIntent = new Intent(SettingsActivity.this, WhitelistContactsActivity.class);
139 | SettingsActivity.this.startActivity(myIntent);
140 | }
141 | });
142 |
143 | infoLinearLayout.setOnClickListener(new View.OnClickListener(){
144 | @Override
145 | public void onClick(View v) {
146 | Intent myIntent = new Intent(SettingsActivity.this, AppInfoActivity.class);
147 | SettingsActivity.this.startActivity(myIntent);
148 | }
149 | });
150 |
151 | permissionsLinearLayout.setOnClickListener(new View.OnClickListener() {
152 | @Override
153 | public void onClick(View v) {
154 | Intent myIntent = new Intent(SettingsActivity.this, PermissionsActivity.class);
155 | SettingsActivity.this.startActivity(myIntent);
156 | }
157 | });
158 |
159 | }
160 | }
161 |
--------------------------------------------------------------------------------
/src/app/src/main/java/com/xfarrow/locatemydevice/WhitelistContactsActivity.java:
--------------------------------------------------------------------------------
1 | package com.xfarrow.locatemydevice;
2 |
3 | import androidx.appcompat.app.AlertDialog;
4 | import androidx.appcompat.app.AppCompatActivity;
5 |
6 | import android.app.Activity;
7 | import android.content.DialogInterface;
8 | import android.content.Intent;
9 | import android.database.Cursor;
10 | import android.net.Uri;
11 | import android.os.Bundle;
12 | import android.provider.ContactsContract;
13 | import android.telephony.PhoneNumberUtils;
14 | import android.text.InputType;
15 | import android.text.method.PasswordTransformationMethod;
16 | import android.view.Menu;
17 | import android.view.MenuItem;
18 | import android.view.View;
19 | import android.widget.AdapterView;
20 | import android.widget.ArrayAdapter;
21 | import android.widget.EditText;
22 | import android.widget.ListView;
23 | import android.widget.Toast;
24 |
25 | import java.util.ArrayList;
26 |
27 | public class WhitelistContactsActivity extends AppCompatActivity {
28 |
29 | private ListView contactsListView;
30 | private ArrayList contactsListView_datasource;
31 | private ArrayAdapter listviewAdapter;
32 | private final WhitelistDbHandler whitelistDbHandler = new WhitelistDbHandler(this);
33 |
34 | private static final int CONTACT_PICK_CODE = 123;
35 |
36 | @Override
37 | protected void onCreate(Bundle savedInstanceState) {
38 | super.onCreate(savedInstanceState);
39 | setContentView(R.layout.activity_whitelist_contacts);
40 | setTitle(R.string.whitelist);
41 | setViews();
42 | setListeners();
43 |
44 | contactsListView_datasource = whitelistDbHandler.getAllContacts();
45 | listviewAdapter = new ArrayAdapter(this,
46 | android.R.layout.simple_list_item_1,
47 | contactsListView_datasource);
48 | contactsListView.setAdapter(listviewAdapter);
49 | }
50 |
51 | private void setViews(){
52 | contactsListView = findViewById(R.id.ContactsListView);
53 | }
54 |
55 | private void setListeners(){
56 | contactsListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
57 | @Override
58 | public void onItemClick(AdapterView adapterView, View view, int i, long l) {
59 | Toast.makeText(WhitelistContactsActivity.this, R.string.long_click_to_delete, Toast.LENGTH_SHORT).show();
60 | }
61 | });
62 |
63 | contactsListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
64 | @Override
65 | public boolean onItemLongClick(AdapterView adapterView, View view, int i, long l) {
66 | String number = (String)adapterView.getItemAtPosition(i);
67 | removeNumberFromWhiteList(number);
68 | return true;
69 | }
70 | });
71 |
72 | }
73 |
74 | // Add "add contact" button on the top
75 | @Override
76 | public boolean onCreateOptionsMenu(Menu menu) {
77 | getMenuInflater().inflate(R.menu.menu_add, menu);
78 | return super.onCreateOptionsMenu(menu);
79 | }
80 |
81 | // "Add contact" click
82 | @Override
83 | public boolean onOptionsItemSelected(MenuItem item) {
84 | int id = item.getItemId();
85 |
86 | if (id == R.id.add_button) {
87 | AlertDialog.Builder alert = new AlertDialog.Builder(WhitelistContactsActivity.this);
88 | alert.setTitle(R.string.add_contact);
89 | alert.setMessage(R.string.type_a_phone_number);
90 |
91 | EditText input = new EditText(WhitelistContactsActivity.this);
92 | input.setInputType(InputType.TYPE_CLASS_PHONE);
93 | alert.setView(input);
94 |
95 | alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
96 | public void onClick(DialogInterface dialog, int whichButton) {
97 | String chosenPhoneNumber = input.getText().toString();
98 | addNumberToWhiteList(chosenPhoneNumber);
99 | }
100 | });
101 |
102 | alert.setNeutralButton(R.string.choose_from_contacts,new DialogInterface.OnClickListener() {
103 | @Override
104 | public void onClick(DialogInterface dialogInterface, int i) {
105 | Intent pickContact = new Intent(Intent.ACTION_PICK, ContactsContract.CommonDataKinds.Phone.CONTENT_URI);
106 | startActivityForResult(pickContact, CONTACT_PICK_CODE);
107 | }
108 | });
109 |
110 | alert.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
111 | @Override
112 | public void onClick(DialogInterface dialogInterface, int i) {
113 | dialogInterface.cancel();
114 | }
115 | });
116 | alert.show();
117 | }
118 | return super.onOptionsItemSelected(item);
119 | }
120 |
121 | // Gets fired when the user has chosen the contact
122 | @Override
123 | protected void onActivityResult (int requestCode, int resultCode, Intent data) {
124 | super.onActivityResult(requestCode, resultCode, data);
125 | if (resultCode == Activity.RESULT_OK && requestCode == CONTACT_PICK_CODE) {
126 | Uri contactData = data.getData();
127 | String[] projection = {
128 | ContactsContract.CommonDataKinds.Phone.NUMBER,
129 | ContactsContract.Contacts.DISPLAY_NAME
130 | };
131 | Cursor c = getContentResolver().query(contactData, projection, null, null, null);
132 | if (c.moveToFirst()) {
133 | int phoneIndex = c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
134 | int contactNameIndex = c.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);
135 | if(phoneIndex < 0){
136 | Toast.makeText(this, R.string.unable_to_retrieve_contact_error, Toast.LENGTH_LONG).show();
137 | return;
138 | }
139 | String number = c.getString(phoneIndex);
140 | String contactName = (contactNameIndex > 0)? c.getString(contactNameIndex) : "unknown"; // planned to show contact's name as well
141 | addNumberToWhiteList(number);
142 | }
143 | c.close();
144 | }
145 | }
146 |
147 | private void addNumberToWhiteList(String phoneNo){
148 | phoneNo = Utils.normalizePhoneNumber(phoneNo);
149 | if(!PhoneNumberUtils.isGlobalPhoneNumber(phoneNo)) {
150 | Toast.makeText(WhitelistContactsActivity.this,
151 | R.string.phone_number_not_valid, Toast.LENGTH_LONG).show();
152 | return;
153 | }
154 | if(contactsListView_datasource.contains(phoneNo)){
155 | Toast.makeText(this, R.string.contact_already_in_the_list, Toast.LENGTH_SHORT).show();
156 | return;
157 | }
158 | whitelistDbHandler.addContact(phoneNo);
159 | contactsListView_datasource.add(phoneNo);
160 | listviewAdapter.notifyDataSetChanged();
161 | }
162 |
163 | private void removeNumberFromWhiteList(String phoneNo){
164 | whitelistDbHandler.deleteContact(phoneNo);
165 | contactsListView_datasource.remove(phoneNo);
166 | listviewAdapter.notifyDataSetChanged();
167 | }
168 | }
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/src/app/src/main/res/layout/settings.xml:
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1 |
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8 |
11 |
12 |
16 |
17 |
25 |
26 |
31 |
32 |
40 |
41 |
45 |
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170 |
171 |
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/src/app/src/main/java/com/xfarrow/locatemydevice/MainActivity.java:
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1 | package com.xfarrow.locatemydevice;
2 |
3 | import androidx.annotation.NonNull;
4 | import androidx.appcompat.app.AlertDialog;
5 | import androidx.appcompat.app.AppCompatActivity;
6 | import androidx.core.app.ActivityCompat;
7 |
8 | import android.Manifest;
9 | import android.app.admin.DevicePolicyManager;
10 | import android.content.ComponentName;
11 | import android.content.DialogInterface;
12 | import android.content.Intent;
13 | import android.content.pm.PackageManager;
14 | import android.os.Build;
15 | import android.os.Bundle;
16 | import android.view.Menu;
17 | import android.view.MenuItem;
18 |
19 | public class MainActivity extends AppCompatActivity {
20 |
21 | private Settings settings;
22 |
23 | @Override
24 | protected void onCreate(Bundle savedInstanceState) {
25 | super.onCreate(savedInstanceState);
26 | setContentView(R.layout.activity_main);
27 | checkPermissions();
28 | }
29 |
30 | private void checkPermissions(){
31 | if (ActivityCompat.checkSelfPermission(this, Manifest.permission.RECEIVE_SMS) != PackageManager.PERMISSION_GRANTED
32 | ||
33 | ActivityCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED
34 | ||
35 | ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED
36 | ||
37 | ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
38 | ||
39 | ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED
40 | ||
41 | ActivityCompat.checkSelfPermission(this, Manifest.permission.SYSTEM_ALERT_WINDOW) != PackageManager.PERMISSION_GRANTED
42 | )
43 | {
44 |
45 | ActivityCompat.requestPermissions(
46 | this,
47 | new String[]{
48 | Manifest.permission.RECEIVE_SMS,
49 | Manifest.permission.SEND_SMS,
50 | Manifest.permission.ACCESS_COARSE_LOCATION,
51 | Manifest.permission.ACCESS_FINE_LOCATION,
52 | Manifest.permission.CALL_PHONE,
53 | Manifest.permission.ACCESS_WIFI_STATE
54 | },
55 | Utils.PERMISSION_MULTIPLE
56 | );
57 | }
58 |
59 | settings = new Settings(this);
60 |
61 | // Request display overlay
62 | if(!android.provider.Settings.canDrawOverlays(this) && !settings.getBoolean(Settings.DO_NOT_SHOW_OVERLAY_PERMISSION_AGAIN)) {
63 | displayDrawOverlayPermissionDialog();
64 | }
65 |
66 | // Admin permission
67 | ComponentName cn = new ComponentName(this, AdminReceiver.class);
68 | DevicePolicyManager mgr = (DevicePolicyManager)getSystemService(DEVICE_POLICY_SERVICE);
69 | if(!mgr.isAdminActive(cn) && !settings.getBoolean(Settings.DO_NOT_SHOW_DEVICE_ADMIN_PERMISSION_AGAIN)){
70 | displayAdminPermissionDialog(cn);
71 | }
72 | }
73 |
74 | public void displayDrawOverlayPermissionDialog(){
75 | AlertDialog.Builder alert = new AlertDialog.Builder(this);
76 | alert.setTitle(R.string.display_over_other_apps);
77 | alert.setMessage(R.string.display_over_other_apps_request_description);
78 |
79 | alert.setPositiveButton(R.string.settings, new DialogInterface.OnClickListener() {
80 | public void onClick(DialogInterface dialog, int whichButton) {
81 | Intent intent = new Intent(android.provider.Settings.ACTION_MANAGE_OVERLAY_PERMISSION);
82 | MainActivity.this.startActivity(intent);
83 | }
84 | });
85 |
86 | alert.setNegativeButton(R.string.dont_show_again, new DialogInterface.OnClickListener(){
87 | @Override
88 | public void onClick(DialogInterface dialog, int which) {
89 | if(settings != null)
90 | settings.setBoolean(Settings.DO_NOT_SHOW_OVERLAY_PERMISSION_AGAIN, true);
91 | }
92 | });
93 |
94 | alert.setNeutralButton(R.string.cancel, new DialogInterface.OnClickListener() {
95 | @Override
96 | public void onClick(DialogInterface dialogInterface, int i) {
97 | dialogInterface.cancel();
98 | }
99 | });
100 | alert.show();
101 | }
102 |
103 | public void displayAdminPermissionDialog(ComponentName cn){
104 | AlertDialog.Builder alert = new AlertDialog.Builder(this);
105 | alert.setTitle(R.string.device_administrator);
106 | alert.setMessage(R.string.admin_permission_request_description);
107 |
108 | alert.setPositiveButton(R.string.settings, new DialogInterface.OnClickListener() {
109 | public void onClick(DialogInterface dialog, int whichButton) {
110 | Intent intent= new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
111 | intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN, cn);
112 | intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION, R.string.admin_permission_request_description);
113 | startActivity(intent);
114 | }
115 | });
116 |
117 | alert.setNegativeButton(R.string.dont_show_again, new DialogInterface.OnClickListener(){
118 | @Override
119 | public void onClick(DialogInterface dialog, int which) {
120 | if(settings != null)
121 | settings.setBoolean(Settings.DO_NOT_SHOW_DEVICE_ADMIN_PERMISSION_AGAIN, true);
122 | }
123 | });
124 |
125 | alert.setNeutralButton(R.string.cancel, new DialogInterface.OnClickListener() {
126 | @Override
127 | public void onClick(DialogInterface dialogInterface, int i) {
128 | dialogInterface.cancel();
129 | }
130 | });
131 | alert.show();
132 | }
133 |
134 | @Override
135 | public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
136 | super.onRequestPermissionsResult(requestCode, permissions, grantResults);
137 |
138 | // Grant Background location if and only if FINE_LOCATION is already granted
139 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
140 | if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
141 | && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_BACKGROUND_LOCATION) != PackageManager.PERMISSION_GRANTED)
142 | {
143 | ActivityCompat.requestPermissions(this,
144 | new String[]{Manifest.permission.ACCESS_BACKGROUND_LOCATION},
145 | Utils.PERMISSION_ACCESS_BACKGROUND_LOCATION);
146 | }
147 | }
148 | }
149 |
150 | // Add settings button on the top
151 | @Override
152 | public boolean onCreateOptionsMenu(Menu menu) {
153 | getMenuInflater().inflate(R.menu.menu_settings, menu);
154 | return super.onCreateOptionsMenu(menu);
155 | }
156 |
157 | // Settings button click
158 | @Override
159 | public boolean onOptionsItemSelected(MenuItem item) {
160 | int id = item.getItemId();
161 |
162 | if (id == R.id.settings_button) {
163 | Intent myIntent = new Intent(MainActivity.this, SettingsActivity.class);
164 | MainActivity.this.startActivity(myIntent);
165 | }
166 | return super.onOptionsItemSelected(item);
167 | }
168 | }
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/src/app/src/main/res/layout/activity_permissions.xml:
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2 |
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10 |
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24 |
35 |
36 |
49 |
50 |
61 |
62 |
75 |
76 |
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176 |
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/src/app/src/main/java/com/xfarrow/locatemydevice/SmsHandler.java:
--------------------------------------------------------------------------------
1 | package com.xfarrow.locatemydevice;
2 |
3 | import static android.content.Context.DEVICE_POLICY_SERVICE;
4 |
5 | import android.Manifest;
6 | import android.annotation.SuppressLint;
7 | import android.app.admin.DevicePolicyManager;
8 | import android.content.ComponentName;
9 | import android.content.Context;
10 | import android.content.Intent;
11 | import android.content.IntentFilter;
12 | import android.content.pm.PackageManager;
13 | import android.location.Criteria;
14 | import android.location.Location;
15 | import android.location.LocationListener;
16 | import android.location.LocationManager;
17 | import android.net.Uri;
18 | import android.net.wifi.ScanResult;
19 | import android.net.wifi.WifiInfo;
20 | import android.net.wifi.WifiManager;
21 | import android.os.BatteryManager;
22 | import android.os.Build;
23 | import android.telephony.CellInfo;
24 | import android.telephony.CellInfoCdma;
25 | import android.telephony.CellInfoGsm;
26 | import android.telephony.CellInfoLte;
27 | import android.telephony.CellInfoWcdma;
28 | import android.telephony.SmsManager;
29 | import android.telephony.TelephonyManager;
30 | import android.util.Log;
31 |
32 | import androidx.annotation.NonNull;
33 | import androidx.core.app.ActivityCompat;
34 |
35 | import java.util.Arrays;
36 | import java.util.List;
37 | import java.util.function.Consumer;
38 |
39 | public class SmsHandler {
40 |
41 | /*
42 | * TODO When Location is automatically enabled, it is not fast enough to lock on to the satellite.
43 | * This causes:
44 | * 1. On Android >= API 31 a location = null
45 | * 2. On Android < API 31 to never fire onLocationChanged()
46 | * We should wait for the signal to stabilize before calling these methods but a prefixed sleep
47 | * time might be wrong and/or inefficient. Help wanted!
48 | * https://stackoverflow.com/questions/74367356/problem-with-locationmanager-and-broadcastreceiver-in-android
49 | */
50 |
51 | /*
52 | * Messages:
53 | * [command] [password] [option]
54 | *
55 | */
56 | @SuppressLint("ObsoleteSdkInt")
57 | public void handleSms(String message, String sender, Context context) {
58 | Settings settings = new Settings(context);
59 | SmsManager smsManager = SmsManager.getDefault();
60 | String password = settings.getString(Settings.PASSWORD);
61 | String command = settings.getString(Settings.SMS_COMMAND);
62 | String providedOption = "";
63 | String providedPassword = "";
64 |
65 | // Deny communication to those not in the whitelist, if enabled.
66 | // Deny communication if the message does not start with "LMD "
67 | WhitelistDbHandler whitelistDbHandler = new WhitelistDbHandler(context);
68 | if(!message.startsWith(command + " ") || (settings.getBoolean(Settings.WHITELIST_ENABLED) && !whitelistDbHandler.isContactPresent(sender))){
69 | return;
70 | }
71 |
72 | String[] splitMessage = message.split(" ");
73 | if(Arrays.stream(splitMessage).count() < 3){
74 | return;
75 | }
76 | providedPassword = splitMessage[1];
77 | providedOption = splitMessage[2].toLowerCase();
78 |
79 | // Deny communication if the password is not valid
80 | if (!CipherUtils.get256Sha(providedPassword).equals(password)) {
81 | return;
82 | }
83 |
84 | // locate
85 | if (providedOption.equals(Utils.LOCATE_OPTION)) {
86 |
87 | LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
88 |
89 | // location not enabled and unable to turn it on
90 | if(!locationManager.isLocationEnabled() && !Utils.toggleLocationOn(context)){
91 | String response = "Location is not enabled. Unable to serve request.";
92 | Utils.sendSms(smsManager, response, sender);
93 | return;
94 | }
95 |
96 | // Location permission not granted
97 | if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
98 | String response = "Location permission is not granted. Unable to serve request.";
99 | Utils.sendSms(smsManager, response, sender);
100 | return;
101 | }
102 |
103 | // API 31 and above
104 | if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.S){
105 | locationManager.getCurrentLocation(LocationManager.FUSED_PROVIDER, null, context.getMainExecutor(), new Consumer() {
106 | @Override
107 | public void accept(Location location) {
108 | if(location == null)
109 | return;
110 |
111 | String response = Utils.buildCoordinatesResponse(location.getLatitude(), location.getLongitude());
112 | Utils.sendSms(smsManager, response , sender);
113 | }
114 | });
115 | }
116 |
117 | // Legacy (API < 31)
118 | else{
119 | Criteria locationCriteria = new Criteria();
120 | locationCriteria.setAccuracy(Criteria.ACCURACY_FINE);
121 | locationManager.requestSingleUpdate(locationCriteria, new LocationListener() {
122 | @Override
123 | public void onLocationChanged(@NonNull Location location) {
124 | Log.d("SmsHandler", "Going to send coordinates: " + location.getLatitude() + " " + location.getLongitude());
125 | String response = Utils.buildCoordinatesResponse(location.getLatitude(), location.getLongitude());
126 | Utils.sendSms(smsManager, response, sender);
127 | }
128 |
129 | @Override
130 | public void onProviderEnabled(@NonNull String provider) {
131 | Log.d("SmsHandler", "PROVIDER ENABLED");
132 | }
133 |
134 | @Override
135 | public void onProviderDisabled(@NonNull String provider) {
136 | Log.d("SmsHandler", "PROVIDER DISABLED");
137 | }
138 | }, null);
139 | }
140 | }
141 |
142 | // cellinfo
143 | else if(providedOption.equals(Utils.CELLULAR_INFO_OPTION)) {
144 |
145 | TelephonyManager telephony = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
146 |
147 | StringBuilder responseSms = new StringBuilder();
148 |
149 | responseSms.append("Network country: ");
150 | String country = telephony.getNetworkCountryIso();
151 | responseSms.append(Utils.getCountryNameByIso(country)).append("\n\n");
152 |
153 | // getAllCellInfo() requires Location services to work
154 | LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
155 | boolean isLocationOn;
156 | isLocationOn = locationManager.isLocationEnabled() || Utils.toggleLocationOn(context);
157 |
158 | List availableTowersInRange = telephony.getAllCellInfo();
159 | responseSms.append("Towers in range: ");
160 | if(availableTowersInRange.size() == 0) {
161 | if(isLocationOn){
162 | responseSms.append("none");
163 | }
164 | else{
165 | responseSms.append("unable to serve request, location is off");
166 | }
167 | }
168 |
169 | for(CellInfo tower : availableTowersInRange){
170 | responseSms.append("\n\n");
171 |
172 | if(tower.isRegistered()){
173 | responseSms.append("[Connected to this tower]\n");
174 | }
175 | if (tower instanceof CellInfoWcdma) {
176 | responseSms.append("Radio Type: WCDMA\n");
177 | responseSms.append("Strength: ");
178 | responseSms.append(((CellInfoWcdma)tower).getCellSignalStrength().getLevel()).append("/4\n");
179 | responseSms.append("CID: ").append(((CellInfoWcdma) tower).getCellIdentity().getCid()).append("\n");
180 | responseSms.append("LAC: ").append(((CellInfoWcdma) tower).getCellIdentity().getLac()).append("\n");
181 | responseSms.append("MCC: ").append(((CellInfoWcdma) tower).getCellIdentity().getMccString()).append("\n");
182 | responseSms.append("MNC: ").append(((CellInfoWcdma) tower).getCellIdentity().getMncString()).append("\n");
183 | }
184 | else if (tower instanceof CellInfoGsm) {
185 | responseSms.append("Radio Type: GSM\n");
186 | responseSms.append("Strength: ");
187 | responseSms.append(((CellInfoGsm)tower).getCellSignalStrength().getLevel()).append("/4\n");
188 | responseSms.append("CID: ").append(((CellInfoGsm) tower).getCellIdentity().getCid()).append("\n");
189 | responseSms.append("LAC: ").append(((CellInfoGsm) tower).getCellIdentity().getLac()).append("\n");
190 | responseSms.append("MCC: ").append(((CellInfoGsm) tower).getCellIdentity().getMccString()).append("\n");
191 | responseSms.append("MNC: ").append(((CellInfoGsm) tower).getCellIdentity().getMncString()).append("\n");
192 | }
193 | else if (tower instanceof CellInfoLte) {
194 | responseSms.append("Radio Type: LTE\n");
195 | responseSms.append("Strength: ");
196 | responseSms.append(((CellInfoLte)tower).getCellSignalStrength().getLevel()).append("/4\n");
197 | responseSms.append("CI: ").append(((CellInfoLte) tower).getCellIdentity().getCi()).append("\n");
198 | responseSms.append("TAC: ").append(((CellInfoLte) tower).getCellIdentity().getTac()).append("\n");
199 | responseSms.append("MCC: ").append(((CellInfoLte) tower).getCellIdentity().getMccString()).append("\n");
200 | responseSms.append("MNC: ").append(((CellInfoLte) tower).getCellIdentity().getMncString()).append("\n");
201 | }
202 | else if (tower instanceof CellInfoCdma) {
203 | responseSms.append("Radio Type: CDMA\n");
204 | responseSms.append("Strength: ");
205 | responseSms.append(((CellInfoCdma)tower).getCellSignalStrength().getLevel()).append("/4\n");
206 | responseSms.append("Latitude: ").append(((CellInfoCdma) tower).getCellIdentity().getLatitude()).append("\n");
207 | responseSms.append("Longitude: ").append(((CellInfoCdma) tower).getCellIdentity().getLongitude()).append("\n");
208 | responseSms.append("Network ID: ").append(((CellInfoCdma) tower).getCellIdentity().getNetworkId()).append("\n");
209 | responseSms.append("System ID: ").append(((CellInfoCdma) tower).getCellIdentity().getSystemId()).append("\n");
210 | }
211 | }
212 | Utils.sendSms(smsManager, responseSms.toString(), sender);
213 | }
214 |
215 | // battery
216 | else if(providedOption.equals(Utils.BATTERY_OPTION)){
217 | IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
218 | Intent batteryStatus = context.registerReceiver(null, ifilter);
219 |
220 | StringBuilder responseSms = new StringBuilder();
221 |
222 | // Battery level
223 | int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
224 | int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
225 | float batteryPct = level * 100 / (float)scale;
226 | responseSms.append("Battery level: ").append(Math.round(batteryPct)).append("%\n");
227 |
228 | // Are we charging / charged?
229 | int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
230 | boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING
231 | || status == BatteryManager.BATTERY_STATUS_FULL;
232 | responseSms.append("Charging: ");
233 | if(isCharging) responseSms.append("Yes\n");
234 | else responseSms.append("No");
235 |
236 | // How are we charging?
237 | if(isCharging) {
238 | int chargePlug = batteryStatus.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
239 | responseSms.append("Charging through: ");
240 | if(chargePlug == BatteryManager.BATTERY_PLUGGED_USB)
241 | responseSms.append("USB");
242 | else if(chargePlug == BatteryManager.BATTERY_PLUGGED_AC)
243 | responseSms.append("AC (wall)");
244 | else if( chargePlug == BatteryManager.BATTERY_PLUGGED_WIRELESS)
245 | responseSms.append("Wireless");
246 | else
247 | responseSms.append("Unknown");
248 | }
249 | Utils.sendSms(smsManager, responseSms.toString(), sender);
250 | }
251 |
252 | //callme
253 | // Permission restrictions: https://developer.android.com/guide/components/activities/background-starts
254 | // So we ask to grant the SYSTEM_ALERT_WINDOW permission
255 | else if(providedOption.equals(Utils.CALL_ME_OPTION)){
256 | // if canDrawOverlays() returns false, not necessarily it will be impossible to
257 | // launch a call.
258 | if(!android.provider.Settings.canDrawOverlays(context)){
259 | Utils.sendSms(smsManager, "\"Display over other app\" permission was not " +
260 | "granted, thus it might be impossible to initiate a call.", sender);
261 | }
262 | Intent intent = new Intent(Intent.ACTION_CALL);
263 | intent.setData(Uri.parse("tel:" + sender));
264 | intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
265 | context.startActivity(intent);
266 | }
267 |
268 | // wifi
269 | else if(providedOption.equals(Utils.WIFI_OPTION)){
270 | StringBuilder responseSms = new StringBuilder();
271 |
272 | LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
273 |
274 | if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O_MR1 && !locationManager.isLocationEnabled() && !Utils.toggleLocationOn(context)) {
275 | responseSms.append("Location is off. Unable to execute command.");
276 | Utils.sendSms(smsManager, responseSms.toString(), sender);
277 | return;
278 | }
279 |
280 | WifiManager wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
281 | responseSms.append("Wifi enabled: ");
282 |
283 | if (!wifiManager.isWifiEnabled()) {
284 | responseSms.append("No");
285 | Utils.sendSms(smsManager, responseSms.toString(), sender);
286 | return;
287 | }
288 |
289 | responseSms.append("Yes\n");
290 | WifiInfo wifiInfo = wifiManager.getConnectionInfo();
291 | String ssid = (wifiInfo.getSSID().equals(WifiManager.UNKNOWN_SSID)) ?
292 | "Not connected or unknown" : wifiInfo.getSSID();
293 | String bssid = (wifiInfo.getBSSID().equals("02:00:00:00:00:00")) ?
294 | "Not connected or unknown" : wifiInfo.getBSSID();
295 | responseSms.append("SSID: ").append(ssid).append("\n");
296 | responseSms.append("BSSID: ").append(bssid).append("\n");
297 | if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
298 | responseSms.append("Strength: ").append(wifiManager.calculateSignalLevel(wifiInfo.getRssi()))
299 | .append("/").append(wifiManager.getMaxSignalLevel()).append("\n");
300 | }
301 | responseSms.append("\nNearby networks:");
302 | List scanResults = wifiManager.getScanResults();
303 | for (ScanResult scanResult : scanResults) {
304 | responseSms.append("\n");
305 | responseSms.append("SSID: ").append(scanResult.SSID).append("\n");
306 | responseSms.append("BSSID: ").append(scanResult.BSSID).append("\n");
307 | responseSms.append("Security: ").append(scanResult.capabilities).append("\n");
308 | }
309 | Utils.sendSms(smsManager, responseSms.toString(), sender);
310 | }
311 |
312 | // wifi-on OR wifi-off
313 | else if(providedOption.contains(Utils.WIFI_OPTION) && (providedOption.contains(Utils.ON_SUBOPTION)
314 | || providedOption.contains(Utils.OFF_SUBOPTION))){
315 |
316 | StringBuilder responseSms = new StringBuilder();
317 | if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q){
318 | responseSms.append("Your device does not support this option.");
319 | Utils.sendSms(smsManager, responseSms.toString(), sender);
320 | return;
321 | }
322 |
323 | WifiManager wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
324 | wifiManager.setWifiEnabled(providedOption.contains(Utils.ON_SUBOPTION));
325 | responseSms.append("Command executed");
326 | Utils.sendSms(smsManager, responseSms.toString(), sender);
327 | }
328 |
329 | // lock
330 | else if(providedOption.equals(Utils.LOCK_OPTION)){
331 | StringBuilder responseSms = new StringBuilder();
332 |
333 | DevicePolicyManager mgr = (DevicePolicyManager)context.getSystemService(DEVICE_POLICY_SERVICE);
334 | if(!mgr.isAdminActive(new ComponentName(context, AdminReceiver.class))){
335 | responseSms.append("No admin permission. Aborted");
336 | Utils.sendSms(smsManager, responseSms.toString(), sender);
337 | return;
338 | }
339 | mgr.lockNow();
340 | responseSms.append("Locked");
341 | Utils.sendSms(smsManager, responseSms.toString(), sender);
342 | }
343 |
344 | // show
345 | else if(providedOption.contains(Utils.SHOW_MESSAGE_OPTION)){
346 | String messageToDisplay;
347 | try {
348 | messageToDisplay = message.substring(message.indexOf("\"") + 1,
349 | message.lastIndexOf("\""));
350 | }
351 | catch(StringIndexOutOfBoundsException ex){
352 | Utils.sendSms(smsManager, "Wrong usage", sender);
353 | return;
354 | }
355 | Intent lockScreenMessage = new Intent(context, ShowMessageActivity.class);
356 | lockScreenMessage.putExtra(Utils.SHOW_MESSAGE_OPTION, messageToDisplay);
357 | lockScreenMessage.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
358 | context.startActivity(lockScreenMessage);
359 | Utils.sendSms(smsManager, "Displayed on screen", sender);
360 | }
361 |
362 | // ring
363 | else if(providedOption.equals(Utils.RING_OPTION)){
364 |
365 | // In this way the smartphone will ring only if the overlay on screen permission
366 | // has been granted. This is not something inherently related to ringing,
367 | // rather on the Activity used to show the button "Stop". We could make the phone ring
368 | // without the overlay permission, but there would be no way to stop it except for
369 | // powering it off or closing it from the recent applications (impossible if the phone
370 | // is lost and locked).
371 | if(!android.provider.Settings.canDrawOverlays(context)) {
372 | Utils.sendSms(smsManager, "Unable to ring. Overlay permission not granted.",
373 | sender);
374 | return;
375 | }
376 | Intent ringerActivityIntent = new Intent(context, RingerActivity.class);
377 | ringerActivityIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
378 | context.startActivity(ringerActivityIntent);
379 |
380 | Utils.sendSms(smsManager, "Ringing", sender);
381 | }
382 |
383 | else{
384 | StringBuilder responseSms = new StringBuilder("This option is not valid. Available options:\n\n");
385 |
386 | responseSms.append(Utils.LOCATE_OPTION + ": Will return the most accurate set of coordinates possible " +
387 | "and a link to them pinpointed to OpenStreetMap.\n\n");
388 |
389 | responseSms.append(Utils.CELLULAR_INFO_OPTION + ": Will return a set of uniquely identifiable information" +
390 | " about cell towers near the phone. You can then put this information" +
391 | " on OpenCellId to individuate the smartphone's approximate location.\n\n");
392 |
393 | responseSms.append(Utils.BATTERY_OPTION + ": Will return battery info.\n\n");
394 |
395 | responseSms.append(Utils.LOCK_OPTION + ": Will lock down the smartphone.\n\n");
396 |
397 | responseSms.append(Utils.SHOW_MESSAGE_OPTION + " \"message\": Will show a message on the screen, even when it's locked.\n\n");
398 |
399 | responseSms.append(Utils.CALL_ME_OPTION + ": You will receive a call from the lost smartphone\n\n");
400 |
401 | responseSms.append(Utils.WIFI_OPTION + ": Will return Wi-Fi infos.\n\n");
402 |
403 | responseSms.append(Utils.WIFI_OPTION + Utils.ON_SUBOPTION + ": Will enable Wi-Fi (Only API < 29).\n\n");
404 |
405 | responseSms.append(Utils.WIFI_OPTION + Utils.OFF_SUBOPTION + ": Will disable Wi-Fi (Only API < 29).\n\n");
406 |
407 | responseSms.append(Utils.RING_OPTION + ": Will make the smartphone ring.\n\n");
408 |
409 | Utils.sendSms(smsManager, responseSms.toString(), sender);
410 | }
411 | }
412 | }
413 |
--------------------------------------------------------------------------------
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2 | Version 3, 29 June 2007
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435 | 9. Acceptance Not Required for Having Copies.
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446 | 10. Automatic Licensing of Downstream Recipients.
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453 | An "entity transaction" is a transaction transferring control of an
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469 | sale, or importing the Program or any portion of it.
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471 | 11. Patents.
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473 | A "contributor" is a copyright holder who authorizes use under this
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475 | work thus licensed is called the contributor's "contributor version".
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535 |
536 | Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 |
540 | 12. No Surrender of Others' Freedom.
541 |
542 | If conditions are imposed on you (whether by court order, agreement or
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547 | not convey it at all. For example, if you agree to terms that obligate you
548 | to collect a royalty for further conveying from those to whom you convey
549 | the Program, the only way you could satisfy both those terms and this
550 | License would be to refrain entirely from conveying the Program.
551 |
552 | 13. Use with the GNU Affero General Public License.
553 |
554 | Notwithstanding any other provision of this License, you have
555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
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559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 |
563 | 14. Revised Versions of this License.
564 |
565 | The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time. Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 |
570 | Each version is given a distinguishing version number. If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation. If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 |
579 | If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 |
584 | Later license versions may give you additional or different
585 | permissions. However, no additional obligations are imposed on any
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587 | later version.
588 |
589 | 15. Disclaimer of Warranty.
590 |
591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 |
600 | 16. Limitation of Liability.
601 |
602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 |
612 | 17. Interpretation of Sections 15 and 16.
613 |
614 | If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 |
621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 |
634 |
635 | Copyright (C)
636 |
637 | This program is free software: you can redistribute it and/or modify
638 | it under the terms of the GNU General Public License as published by
639 | the Free Software Foundation, either version 3 of the License, or
640 | (at your option) any later version.
641 |
642 | This program is distributed in the hope that it will be useful,
643 | but WITHOUT ANY WARRANTY; without even the implied warranty of
644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 | GNU General Public License for more details.
646 |
647 | You should have received a copy of the GNU General Public License
648 | along with this program. If not, see .
649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 |
655 | Copyright (C)
656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 | This is free software, and you are welcome to redistribute it
658 | under certain conditions; type `show c' for details.
659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License. Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 |
664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
675 |
--------------------------------------------------------------------------------
5 | 
6 |
7 |
8 | ## Screenshots
9 | | Homescreen | SMS Chat
10 | |:-:|:-:|
11 | | 
| 
|
12 |
13 | ## Usage
14 | Send an SMS to the device you want to locate in order to retrieve information about it.
15 |
16 | **Synopsis**
17 | 
83 |
84 | [1]: https://opencellid.org/
85 |
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1 |
2 |