├── app
├── .gitignore
├── src
│ └── main
│ │ ├── res
│ │ ├── drawable-hdpi
│ │ │ └── ic_check.png
│ │ ├── drawable-xhdpi
│ │ │ └── ic_check.png
│ │ ├── drawable-xxhdpi
│ │ │ └── ic_check.png
│ │ ├── mipmap-hdpi
│ │ │ ├── ic_launcher.png
│ │ │ └── ic_launcher_round.png
│ │ ├── mipmap-mdpi
│ │ │ ├── ic_launcher.png
│ │ │ └── ic_launcher_round.png
│ │ ├── mipmap-xhdpi
│ │ │ ├── ic_launcher.png
│ │ │ └── ic_launcher_round.png
│ │ ├── drawable-xxxhdpi
│ │ │ └── ic_check.png
│ │ ├── mipmap-xxhdpi
│ │ │ ├── ic_launcher.png
│ │ │ └── ic_launcher_round.png
│ │ ├── mipmap-xxxhdpi
│ │ │ ├── ic_launcher.png
│ │ │ └── ic_launcher_round.png
│ │ ├── values
│ │ │ ├── colors.xml
│ │ │ ├── dimens.xml
│ │ │ ├── strings.xml
│ │ │ └── styles.xml
│ │ └── layout
│ │ │ ├── activity_signin.xml
│ │ │ ├── activity_petrol.xml
│ │ │ ├── activity_detail.xml
│ │ │ ├── activity_main.xml
│ │ │ ├── fragment_all_topics.xml
│ │ │ ├── activity_read_write.xml
│ │ │ └── item_topic.xml
│ │ ├── java
│ │ └── com
│ │ │ └── firebase
│ │ │ └── devday
│ │ │ ├── configs
│ │ │ ├── MyAppGlideModule.java
│ │ │ └── MyApplication.java
│ │ │ ├── models
│ │ │ ├── Message.java
│ │ │ ├── User.java
│ │ │ └── Topic.java
│ │ │ ├── BaseActivity.java
│ │ │ ├── helpers
│ │ │ └── MyHelper.java
│ │ │ ├── MainActivity.java
│ │ │ ├── PetrolActivity.java
│ │ │ ├── DetailActivity.java
│ │ │ ├── ReadWriteActivity.java
│ │ │ ├── SigninActivity.java
│ │ │ └── ListActivity.java
│ │ └── AndroidManifest.xml
├── proguard-rules.pro
└── build.gradle
├── settings.gradle
├── gradle
└── wrapper
│ ├── gradle-wrapper.jar
│ └── gradle-wrapper.properties
├── .gitignore
├── gradle.properties
├── README.md
├── gradlew.bat
└── gradlew
/app/.gitignore:
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1 | /build
2 |
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/settings.gradle:
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1 | include ':app'
2 |
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/gradle/wrapper/gradle-wrapper.jar:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/gradle/wrapper/gradle-wrapper.jar
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/app/src/main/res/drawable-hdpi/ic_check.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/drawable-hdpi/ic_check.png
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/app/src/main/res/drawable-xhdpi/ic_check.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/drawable-xhdpi/ic_check.png
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/app/src/main/res/drawable-xxhdpi/ic_check.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/drawable-xxhdpi/ic_check.png
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/app/src/main/res/mipmap-hdpi/ic_launcher.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher.png
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/app/src/main/res/mipmap-mdpi/ic_launcher.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher.png
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/app/src/main/res/mipmap-xhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher.png
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/app/src/main/res/drawable-xxxhdpi/ic_check.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/drawable-xxxhdpi/ic_check.png
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/app/src/main/res/mipmap-xxhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
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/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
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/app/src/main/res/mipmap-hdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
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/app/src/main/res/mipmap-mdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
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/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
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/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
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/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png:
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https://raw.githubusercontent.com/jirawatee/FirebaseDevDay-Android/HEAD/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
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/app/src/main/res/values/colors.xml:
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1 |
2 |
3 | #039be5
4 | #0288d1
5 | #fb8c00
6 |
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/app/src/main/res/values/dimens.xml:
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1 |
2 | 80dp
3 | 16dp
4 | 8dp
5 | 4dp
6 |
7 |
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/gradle/wrapper/gradle-wrapper.properties:
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1 | #Tue Jul 18 11:01:00 ICT 2017
2 | distributionBase=GRADLE_USER_HOME
3 | distributionPath=wrapper/dists
4 | zipStoreBase=GRADLE_USER_HOME
5 | zipStorePath=wrapper/dists
6 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-all.zip
7 |
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/app/src/main/java/com/firebase/devday/configs/MyAppGlideModule.java:
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1 | package com.firebase.devday.configs;
2 |
3 | import com.bumptech.glide.annotation.GlideModule;
4 | import com.bumptech.glide.module.AppGlideModule;
5 |
6 | @GlideModule
7 | public final class MyAppGlideModule extends AppGlideModule {
8 | @Override
9 | public boolean isManifestParsingEnabled() {
10 | return false;
11 | }
12 | }
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/app/src/main/java/com/firebase/devday/configs/MyApplication.java:
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1 | package com.firebase.devday.configs;
2 |
3 | import android.app.Application;
4 |
5 | import com.google.firebase.database.FirebaseDatabase;
6 |
7 | public class MyApplication extends Application{
8 | @Override
9 | public void onCreate() {
10 | super.onCreate();
11 | FirebaseDatabase.getInstance().setPersistenceEnabled(true);
12 | }
13 | }
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/app/src/main/java/com/firebase/devday/models/Message.java:
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1 | package com.firebase.devday.models;
2 |
3 | import com.google.firebase.database.IgnoreExtraProperties;
4 |
5 | @IgnoreExtraProperties
6 | public class Message {
7 | public String message;
8 | public boolean translated;
9 |
10 | public Message() {
11 | // Default constructor required for calls to DataSnapshot.getValue(User.class)
12 | }
13 |
14 | public Message(String message, boolean translated) {
15 | this.message = message;
16 | this.translated = translated;
17 | }
18 | }
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/app/src/main/java/com/firebase/devday/BaseActivity.java:
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1 | package com.firebase.devday;
2 |
3 | import androidx.appcompat.app.AppCompatActivity;
4 | import android.widget.Toast;
5 |
6 | public class BaseActivity extends AppCompatActivity {
7 | private long mBackPressed = 0;
8 |
9 | @Override
10 | public void onBackPressed() {
11 | if (mBackPressed + 2000 > System.currentTimeMillis()) {
12 | super.onBackPressed();
13 | } else {
14 | Toast.makeText(this, R.string.exit, Toast.LENGTH_SHORT).show();
15 | mBackPressed = System.currentTimeMillis();
16 | }
17 | }
18 | }
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/app/src/main/res/layout/activity_signin.xml:
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1 |
2 |
9 |
10 |
15 |
16 |
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/app/src/main/java/com/firebase/devday/models/User.java:
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1 | package com.firebase.devday.models;
2 |
3 | import com.google.firebase.database.IgnoreExtraProperties;
4 |
5 | @IgnoreExtraProperties
6 | public class User {
7 | public boolean isAdmin;
8 | public String email;
9 | public String avatar;
10 | public String speaker;
11 |
12 | public User() {
13 | // Default constructor required for calls to DataSnapshot.getValue(User.class)
14 | }
15 |
16 | public User(String email, String speaker, String avatar, boolean isAdmin) {
17 | this.email = email;
18 | this.speaker = speaker;
19 | this.avatar = avatar;
20 | this.isAdmin = isAdmin;
21 | }
22 | }
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/app/src/main/res/values/strings.xml:
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1 |
2 | DevDay
3 | Press back again to exit
4 |
5 | Read and Write Data
6 | Listener | Ordering | Filtering
7 | orderByValue
8 | Sign Out
9 | setValue single
10 | setValue object
11 | Do you like to delete \"%s\"?
12 | Vote %d
13 | Push
14 |
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/app/src/main/res/layout/activity_petrol.xml:
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1 |
2 |
9 |
10 |
17 |
18 |
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/.gitignore:
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1 | #built application files
2 | *.apk
3 | *.ap_
4 |
5 | # files for the dex VM
6 | *.dex
7 |
8 | # Java class files
9 | *.class
10 |
11 | # generated files
12 | bin/
13 | gen/
14 | out/
15 |
16 | # Local configuration file (sdk path, etc)
17 | local.properties
18 |
19 | # Windows thumbnail db
20 | Thumbs.db
21 |
22 | # OSX files
23 | .DS_Store
24 |
25 | # Log Files
26 | *.log
27 |
28 | # Android Studio
29 | *.iml
30 | .gradle/
31 | build/
32 | captures/
33 | .navigation/
34 |
35 | # Intellij IDEA
36 | .idea/
37 |
38 | # Eclipse project files
39 | .classpath
40 | .project
41 |
42 | # Proguard folder generated by Eclipse
43 | proguard/
44 |
45 | # Eclipse Metadata
46 | .metadata/
47 |
48 | # Keystore files
49 | *.jks
50 |
51 | .externalNativeBuild
52 |
53 | google-services.json
54 |
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/gradle.properties:
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1 | # Project-wide Gradle settings.
2 |
3 | # IDE (e.g. Android Studio) users:
4 | # Gradle settings configured through the IDE *will override*
5 | # any settings specified in this file.
6 |
7 | # For more details on how to configure your build environment visit
8 | # http://www.gradle.org/docs/current/userguide/build_environment.html
9 |
10 | # Specifies the JVM arguments used for the daemon process.
11 | # The setting is particularly useful for tweaking memory settings.
12 | #org.gradle.jvmargs=-Xmx1536m
13 |
14 | # When configured, Gradle will run in incubating parallel mode.
15 | # This option should only be used with decoupled projects. More details, visit
16 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
17 | # org.gradle.parallel=true
18 | android.enableJetifier=true
19 | android.useAndroidX=true
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/README.md:
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1 | # Deep Dive into Realtime Database (Firebase Dev Day 2017)
2 | Sample code from Deep dive into Firebase Realtime Database session in Firebase Dev Day 2017 Bangkok
3 |
4 | ## Prerequisites
5 | * Supported Android 4.1 or newer
6 | * Android Studio 3.3.2 or higher
7 | * google-services.json in app-level folder
8 |
9 | ## Contents
10 | * DatabaseReference
11 | * Data Reading
12 | * Data Writing
13 | * Listeners
14 | * Query Ordering
15 | * Query Filtering
16 | * Data Removing
17 | * Enabling Offline Mode
18 |
19 | ## Screenshots
20 |
21 |
22 |  |
23 |
24 |
25 |
26 | ## Blog
27 | [Deep Dive into Firebase Realtime Database](https://medium.com/@jirawatee/deep-dive-into-firebase-realtime-database-5cc692998375#.nushk7csb)
28 |
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/app/src/main/res/layout/activity_detail.xml:
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1 |
2 |
9 |
10 |
16 |
17 |
24 |
25 |
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/app/proguard-rules.pro:
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1 | -keepattributes Signature
2 | -keepattributes *Annotation*
3 | -keepattributes EnclosingMethod
4 | -keepattributes InnerClasses
5 |
6 | -keepclassmembers class com.firebase.devday.models.** {*;}
7 |
8 | -keep public class * implements com.bumptech.glide.module.GlideModule
9 | -keep public class * extends com.bumptech.glide.module.AppGlideModule
10 | -keep public enum com.bumptech.glide.load.ImageHeaderParser$** {
11 | **[] $VALUES;
12 | public *;
13 | }
14 |
15 | # If you're targeting any API level less than Android API 27, also include:
16 | -dontwarn com.bumptech.glide.load.resource.bitmap.VideoDecoder
17 |
18 | -assumenosideeffects class android.util.Log {
19 | public static boolean isLoggable(java.lang.String, int);
20 | public static int v(...);
21 | public static int i(...);
22 | public static int w(...);
23 | public static int d(...);
24 | public static int e(...);
25 | public static int wtf(...);
26 | }
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/app/src/main/java/com/firebase/devday/helpers/MyHelper.java:
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1 | package com.firebase.devday.helpers;
2 |
3 | import android.app.Activity;
4 | import android.app.Dialog;
5 | import android.content.Context;
6 | import android.content.Intent;
7 | import android.widget.LinearLayout;
8 | import android.widget.ProgressBar;
9 |
10 | import com.firebase.devday.R;
11 |
12 | public class MyHelper {
13 | private static Dialog mDialog;
14 |
15 | public static void showDialog(Context context) {
16 | mDialog = new Dialog(context, R.style.CustomDialog);
17 | mDialog.addContentView(
18 | new ProgressBar(context),
19 | new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT)
20 | );
21 | mDialog.setCancelable(true);
22 | if (!mDialog.isShowing()) {
23 | mDialog.show();
24 | }
25 | }
26 |
27 | public static void dismissDialog() {
28 | if (mDialog != null && mDialog.isShowing()) {
29 | mDialog.dismiss();
30 | }
31 | }
32 |
33 | public static void redirect(Activity activity, Class activityClass) {
34 | activity.startActivity(new Intent(activity, activityClass));
35 | activity.finish();
36 | }
37 | }
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/app/src/main/AndroidManifest.xml:
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1 |
2 |
5 |
6 |
15 |
16 |
19 |
20 |
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
31 |
32 |
33 |
34 |
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/app/src/main/res/layout/activity_main.xml:
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1 |
2 |
11 |
12 |
17 |
18 |
23 |
24 |
29 |
30 |
35 |
36 |
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/app/src/main/res/layout/fragment_all_topics.xml:
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1 |
2 |
9 |
10 |
22 |
23 |
31 |
32 |
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/app/src/main/res/layout/activity_read_write.xml:
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1 |
2 |
9 |
10 |
17 |
18 |
23 |
24 |
29 |
30 |
35 |
36 |
37 |
38 |
43 |
44 |
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/app/build.gradle:
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1 | apply plugin: 'com.android.application'
2 |
3 | android {
4 | compileSdkVersion compileAndTargetSdk
5 | buildToolsVersion "30.0.3"
6 |
7 | defaultConfig {
8 | applicationId "com.firebase.devday"
9 | minSdkVersion 21
10 | targetSdkVersion compileAndTargetSdk
11 | versionCode 1
12 | versionName "1.0"
13 | resConfigs("en", "xxxhdpi")
14 | ndk {
15 | abiFilters "x86", "x86_64", "arm64-v8a", "armeabi-v7a"
16 | }
17 | }
18 |
19 | buildTypes {
20 | release {
21 | minifyEnabled true
22 | shrinkResources true
23 | proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
24 | }
25 | debug {
26 | splits.abi.enable = false
27 | splits.density.enable = false
28 | aaptOptions.cruncherEnabled = false
29 | }
30 | }
31 |
32 | dexOptions {
33 | preDexLibraries true
34 | maxProcessCount 8
35 | }
36 | }
37 |
38 | dependencies {
39 | implementation 'androidx.appcompat:appcompat:1.2.0'
40 | implementation 'androidx.recyclerview:recyclerview:1.2.0'
41 | implementation 'androidx.cardview:cardview:1.0.0'
42 | implementation 'com.google.android.material:material:1.3.0'
43 | implementation "com.google.android.gms:play-services-auth:19.0.0"
44 | implementation "com.google.firebase:firebase-auth:20.0.4"
45 | implementation "com.google.firebase:firebase-database:19.7.0"
46 | implementation "com.github.bumptech.glide:glide:$glideLibraryVersion"
47 | annotationProcessor "com.github.bumptech.glide:compiler:$glideLibraryVersion"
48 | annotationProcessor 'androidx.annotation:annotation:1.2.0'
49 | }
50 |
51 | apply plugin: 'com.google.gms.google-services'
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/app/src/main/res/values/styles.xml:
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1 |
2 |
7 |
8 |
12 |
13 |
25 |
26 |
31 |
32 |
37 |
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/app/src/main/res/layout/item_topic.xml:
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1 |
2 |
9 |
10 |
14 |
15 |
21 |
22 |
26 |
27 |
36 |
37 |
42 |
43 |
48 |
49 |
50 |
51 |
52 |
53 |
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/app/src/main/java/com/firebase/devday/models/Topic.java:
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1 | package com.firebase.devday.models;
2 |
3 | import com.google.firebase.database.Exclude;
4 | import com.google.firebase.database.IgnoreExtraProperties;
5 | import com.google.firebase.database.ServerValue;
6 |
7 | import java.util.HashMap;
8 | import java.util.Map;
9 |
10 | @IgnoreExtraProperties
11 | public class Topic {
12 | public String avatar;
13 | public String body;
14 | public String picture;
15 | public String speaker;
16 | public String status = "future";
17 | public long timeAdd = 0;
18 | public String title;
19 | public String uid;
20 |
21 | public int voteCount = 0;
22 | public Map votes = new HashMap<>();
23 |
24 | public int joinCount = 0;
25 | public Map joins = new HashMap<>();
26 |
27 | public int redeemCount = 0;
28 |
29 | public Topic() {
30 | // Default constructor required for calls to DataSnapshot.getValue(Topic.class)
31 | }
32 |
33 | public Topic(String uid, String speaker, String avatar, String title, String body, String picture) {
34 | this.uid = uid;
35 | this.speaker = speaker;
36 | this.avatar = avatar;
37 | this.title = title;
38 | this.body = body;
39 | this.picture = picture;
40 | }
41 |
42 | @Exclude
43 | public Map toMap() {
44 | HashMap result = new HashMap<>();
45 | result.put("uid", uid);
46 | result.put("speaker", speaker);
47 | result.put("avatar", avatar);
48 |
49 | result.put("title", title);
50 | result.put("body", body);
51 | result.put("picture", picture);
52 |
53 | result.put("status", status);
54 | if (timeAdd == 0) {
55 | result.put("timeAdd", ServerValue.TIMESTAMP);
56 | } else {
57 | result.put("timeAdd", timeAdd);
58 | }
59 |
60 | result.put("voteCount", voteCount);
61 | result.put("joinCount", joinCount);
62 | result.put("redeemCount", redeemCount);
63 |
64 | result.put("votes", votes);
65 | result.put("joins", joins);
66 | return result;
67 | }
68 | }
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/app/src/main/java/com/firebase/devday/MainActivity.java:
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1 | package com.firebase.devday;
2 |
3 | import android.content.DialogInterface;
4 | import android.content.Intent;
5 | import android.os.Bundle;
6 | import androidx.appcompat.app.AlertDialog;
7 | import android.view.View;
8 |
9 | import com.firebase.devday.helpers.MyHelper;
10 | import com.google.firebase.auth.FirebaseAuth;
11 |
12 | public class MainActivity extends BaseActivity implements View.OnClickListener {
13 | @Override
14 | protected void onCreate(Bundle savedInstanceState) {
15 | super.onCreate(savedInstanceState);
16 | setContentView(R.layout.activity_main);
17 |
18 | findViewById(R.id.btn_read_write).setOnClickListener(this);
19 | findViewById(R.id.btn_orderby_value).setOnClickListener(this);
20 | findViewById(R.id.btn_listener).setOnClickListener(this);
21 | findViewById(R.id.btn_sign_out).setOnClickListener(this);
22 | }
23 |
24 | @Override
25 | public void onClick(View view) {
26 | switch (view.getId()) {
27 | case R.id.btn_read_write:
28 | startActivity(new Intent(this, ReadWriteActivity.class));
29 | break;
30 | case R.id.btn_listener:
31 | startActivity(new Intent(this, ListActivity.class));
32 | break;
33 | case R.id.btn_orderby_value:
34 | startActivity(new Intent(this, PetrolActivity.class));
35 | break;
36 | case R.id.btn_sign_out:
37 | signOut();
38 | break;
39 | }
40 | }
41 |
42 | private void signOut() {
43 | AlertDialog.Builder alert = new AlertDialog.Builder(this);
44 | alert.setMessage("Sign out?");
45 | alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
46 | @Override
47 | public void onClick(DialogInterface dialogInterface, int i) {
48 | dialogInterface.dismiss();
49 | FirebaseAuth.getInstance().signOut();
50 | MyHelper.redirect(MainActivity.this, SigninActivity.class);
51 | }
52 | });
53 | alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
54 | @Override
55 | public void onClick(DialogInterface dialogInterface, int i) {
56 | dialogInterface.dismiss();
57 | }
58 | });
59 | alert.show();
60 | }
61 | }
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/app/src/main/java/com/firebase/devday/PetrolActivity.java:
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1 | package com.firebase.devday;
2 |
3 | import android.os.Bundle;
4 | import androidx.appcompat.app.AppCompatActivity;
5 | import android.util.Log;
6 | import android.widget.TextView;
7 |
8 | import com.firebase.devday.helpers.MyHelper;
9 | import com.google.firebase.database.DataSnapshot;
10 | import com.google.firebase.database.DatabaseError;
11 | import com.google.firebase.database.DatabaseReference;
12 | import com.google.firebase.database.FirebaseDatabase;
13 | import com.google.firebase.database.Query;
14 | import com.google.firebase.database.ValueEventListener;
15 |
16 | public class PetrolActivity extends AppCompatActivity {
17 | private Query mQuery;
18 | private TextView mTextView;
19 | private ValueEventListener valueEventListener;
20 |
21 | @Override
22 | protected void onCreate(Bundle savedInstanceState) {
23 | super.onCreate(savedInstanceState);
24 | setContentView(R.layout.activity_petrol);
25 | mTextView = findViewById(R.id.txt);
26 | DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference();
27 | mQuery = mDatabase.child("Petrol").orderByValue();
28 | }
29 |
30 | @Override
31 | protected void onStart() {
32 | super.onStart();
33 | MyHelper.showDialog(this);
34 | valueEventListener = new ValueEventListener() {
35 | @Override
36 | public void onDataChange(DataSnapshot dataSnapshot) {
37 | MyHelper.dismissDialog();
38 | Iterable children = dataSnapshot.getChildren();
39 | while(children.iterator().hasNext()) {
40 | String key = children.iterator().next().getKey();
41 | mTextView.append(dataSnapshot.getKey());
42 | mTextView.append(": " + dataSnapshot.child(key).getValue(Double.class));
43 | mTextView.append("\n");
44 |
45 | Log.d("Petrol", dataSnapshot.getKey() + ": " + dataSnapshot.child(key).getValue(Double.class));
46 | }
47 | }
48 |
49 | @Override
50 | public void onCancelled(DatabaseError databaseError) {
51 | MyHelper.dismissDialog();
52 | }
53 | };
54 | mQuery.addValueEventListener(valueEventListener);
55 | }
56 |
57 | @Override
58 | protected void onStop() {
59 | super.onStop();
60 | if (valueEventListener != null) {
61 | mQuery.removeEventListener(valueEventListener);
62 | }
63 | }
64 | }
--------------------------------------------------------------------------------
/app/src/main/java/com/firebase/devday/DetailActivity.java:
--------------------------------------------------------------------------------
1 | package com.firebase.devday;
2 |
3 | import android.os.Bundle;
4 | import androidx.appcompat.app.AppCompatActivity;
5 | import android.widget.ImageView;
6 | import android.widget.TextView;
7 |
8 | import com.bumptech.glide.Glide;
9 | import com.firebase.devday.helpers.MyHelper;
10 | import com.firebase.devday.models.Topic;
11 | import com.google.firebase.database.DataSnapshot;
12 | import com.google.firebase.database.DatabaseError;
13 | import com.google.firebase.database.DatabaseReference;
14 | import com.google.firebase.database.FirebaseDatabase;
15 | import com.google.firebase.database.ValueEventListener;
16 |
17 | public class DetailActivity extends AppCompatActivity {
18 | private DatabaseReference mTopicRef;
19 | private ImageView mImageView;
20 | private TextView mTextView;
21 | private ValueEventListener valueEventListener;
22 |
23 | @Override
24 | protected void onCreate(Bundle savedInstanceState) {
25 | super.onCreate(savedInstanceState);
26 | setContentView(R.layout.activity_detail);
27 |
28 | mImageView = findViewById(R.id.picture);
29 | mTextView = findViewById(R.id.txt);
30 |
31 | String topicKey = getIntent().getStringExtra("topicKey");
32 |
33 | DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference();
34 | mTopicRef = mDatabase.child("topics").child(topicKey);
35 | }
36 |
37 | @Override
38 | protected void onStart() {
39 | super.onStart();
40 | MyHelper.showDialog(this);
41 | valueEventListener = new ValueEventListener() {
42 | @Override
43 | public void onDataChange(DataSnapshot dataSnapshot) {
44 | MyHelper.dismissDialog();
45 | Topic topic = dataSnapshot.getValue(Topic.class);
46 | updateView(topic);
47 | }
48 |
49 | @Override
50 | public void onCancelled(DatabaseError databaseError) {
51 | MyHelper.dismissDialog();
52 | }
53 | };
54 | mTopicRef.addValueEventListener(valueEventListener);
55 | }
56 |
57 | @Override
58 | protected void onStop() {
59 | super.onStop();
60 | if (valueEventListener != null) {
61 | mTopicRef.removeEventListener(valueEventListener);
62 | }
63 | }
64 |
65 | private void updateView(Topic topic) {
66 | Glide.with(this).load(topic.picture).into(mImageView);
67 | mTextView.setText(topic.title);
68 | mTextView.append("\n\n" + topic.speaker);
69 | mTextView.append("\n\n" + topic.body);
70 | mTextView.append("\n\nVote " + topic.voteCount);
71 | }
72 | }
--------------------------------------------------------------------------------
/gradlew.bat:
--------------------------------------------------------------------------------
1 | @if "%DEBUG%" == "" @echo off
2 | @rem ##########################################################################
3 | @rem
4 | @rem Gradle startup script for Windows
5 | @rem
6 | @rem ##########################################################################
7 |
8 | @rem Set local scope for the variables with windows NT shell
9 | if "%OS%"=="Windows_NT" setlocal
10 |
11 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
12 | set DEFAULT_JVM_OPTS=
13 |
14 | set DIRNAME=%~dp0
15 | if "%DIRNAME%" == "" set DIRNAME=.
16 | set APP_BASE_NAME=%~n0
17 | set APP_HOME=%DIRNAME%
18 |
19 | @rem Find java.exe
20 | if defined JAVA_HOME goto findJavaFromJavaHome
21 |
22 | set JAVA_EXE=java.exe
23 | %JAVA_EXE% -version >NUL 2>&1
24 | if "%ERRORLEVEL%" == "0" goto init
25 |
26 | echo.
27 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
28 | echo.
29 | echo Please set the JAVA_HOME variable in your environment to match the
30 | echo location of your Java installation.
31 |
32 | goto fail
33 |
34 | :findJavaFromJavaHome
35 | set JAVA_HOME=%JAVA_HOME:"=%
36 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe
37 |
38 | if exist "%JAVA_EXE%" goto init
39 |
40 | echo.
41 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
42 | echo.
43 | echo Please set the JAVA_HOME variable in your environment to match the
44 | echo location of your Java installation.
45 |
46 | goto fail
47 |
48 | :init
49 | @rem Get command-line arguments, handling Windowz variants
50 |
51 | if not "%OS%" == "Windows_NT" goto win9xME_args
52 | if "%@eval[2+2]" == "4" goto 4NT_args
53 |
54 | :win9xME_args
55 | @rem Slurp the command line arguments.
56 | set CMD_LINE_ARGS=
57 | set _SKIP=2
58 |
59 | :win9xME_args_slurp
60 | if "x%~1" == "x" goto execute
61 |
62 | set CMD_LINE_ARGS=%*
63 | goto execute
64 |
65 | :4NT_args
66 | @rem Get arguments from the 4NT Shell from JP Software
67 | set CMD_LINE_ARGS=%$
68 |
69 | :execute
70 | @rem Setup the command line
71 |
72 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
73 |
74 | @rem Execute Gradle
75 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
76 |
77 | :end
78 | @rem End local scope for the variables with windows NT shell
79 | if "%ERRORLEVEL%"=="0" goto mainEnd
80 |
81 | :fail
82 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
83 | rem the _cmd.exe /c_ return code!
84 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
85 | exit /b 1
86 |
87 | :mainEnd
88 | if "%OS%"=="Windows_NT" endlocal
89 |
90 | :omega
91 |
--------------------------------------------------------------------------------
/app/src/main/java/com/firebase/devday/ReadWriteActivity.java:
--------------------------------------------------------------------------------
1 | package com.firebase.devday;
2 |
3 | import android.os.Bundle;
4 | import androidx.appcompat.app.AppCompatActivity;
5 | import android.view.View;
6 | import android.widget.TextView;
7 |
8 | import com.firebase.devday.helpers.MyHelper;
9 | import com.firebase.devday.models.User;
10 | import com.google.firebase.database.DataSnapshot;
11 | import com.google.firebase.database.DatabaseError;
12 | import com.google.firebase.database.DatabaseReference;
13 | import com.google.firebase.database.FirebaseDatabase;
14 | import com.google.firebase.database.ValueEventListener;
15 |
16 | public class ReadWriteActivity extends AppCompatActivity implements View.OnClickListener {
17 | private static final String USER_ID = "HuwtqNSpuedOz9rprj4YLPID2oy2";
18 | private DatabaseReference mDatabase, mUsersRef;
19 | private TextView mTextView;
20 | private ValueEventListener valueEventListener;
21 |
22 | @Override
23 | protected void onCreate(Bundle savedInstanceState) {
24 | super.onCreate(savedInstanceState);
25 | setContentView(R.layout.activity_read_write);
26 |
27 | mTextView = findViewById(R.id.txt);
28 | findViewById(R.id.btn_set_single).setOnClickListener(this);
29 | findViewById(R.id.btn_set_object).setOnClickListener(this);
30 | findViewById(R.id.btn_push).setOnClickListener(this);
31 |
32 | mDatabase = FirebaseDatabase.getInstance().getReference();
33 | mUsersRef = mDatabase.child("users").child(USER_ID);
34 | }
35 |
36 | @Override
37 | protected void onStart() {
38 | super.onStart();
39 | MyHelper.showDialog(this);
40 | valueEventListener = new ValueEventListener() {
41 | @Override
42 | public void onDataChange(DataSnapshot dataSnapshot) {
43 | MyHelper.dismissDialog();
44 | User user = dataSnapshot.getValue(User.class);
45 | updateView(user);
46 | }
47 |
48 | @Override
49 | public void onCancelled(DatabaseError databaseError) {
50 | MyHelper.dismissDialog();
51 | }
52 | };
53 | mUsersRef.addValueEventListener(valueEventListener);
54 | }
55 |
56 | @Override
57 | protected void onStop() {
58 | super.onStop();
59 | if (valueEventListener != null) {
60 | mUsersRef.removeEventListener(valueEventListener);
61 | }
62 | }
63 |
64 | @Override
65 | public void onClick(View view) {
66 | User user = new User(
67 | "firebasethailand@gmail.com",
68 | "Firebaser",
69 | "https://pbs.twimg.com/profile_images/744165523978493952/02eZ4I34.jpg",
70 | true
71 | );
72 | switch (view.getId()) {
73 | case R.id.btn_set_single:
74 | mUsersRef.child("email").setValue("firebasethailand@gmail.com");
75 | break;
76 | case R.id.btn_set_object:
77 | mUsersRef.setValue(user);
78 | break;
79 | case R.id.btn_push:
80 | mDatabase.child("users").push().setValue(user);
81 | break;
82 | }
83 | }
84 |
85 | private void updateView(User user) {
86 | mTextView.setText(user.email);
87 | mTextView.append("\n" + user.speaker);
88 | mTextView.append("\n" + user.isAdmin);
89 | }
90 | }
--------------------------------------------------------------------------------
/app/src/main/java/com/firebase/devday/SigninActivity.java:
--------------------------------------------------------------------------------
1 | package com.firebase.devday;
2 |
3 | import android.content.Intent;
4 | import android.os.Bundle;
5 | import androidx.annotation.NonNull;
6 | import android.view.View;
7 | import android.widget.Toast;
8 |
9 | import com.firebase.devday.helpers.MyHelper;
10 | import com.firebase.devday.models.User;
11 | import com.google.android.gms.auth.api.Auth;
12 | import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
13 | import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
14 | import com.google.android.gms.auth.api.signin.GoogleSignInResult;
15 | import com.google.android.gms.common.ConnectionResult;
16 | import com.google.android.gms.common.SignInButton;
17 | import com.google.android.gms.common.api.GoogleApiClient;
18 | import com.google.android.gms.tasks.OnCompleteListener;
19 | import com.google.android.gms.tasks.Task;
20 | import com.google.firebase.auth.AuthCredential;
21 | import com.google.firebase.auth.AuthResult;
22 | import com.google.firebase.auth.FirebaseAuth;
23 | import com.google.firebase.auth.FirebaseUser;
24 | import com.google.firebase.auth.GoogleAuthProvider;
25 | import com.google.firebase.database.FirebaseDatabase;
26 |
27 | public class SigninActivity extends BaseActivity implements View.OnClickListener, GoogleApiClient.OnConnectionFailedListener {
28 | private static final int RC_SIGN_IN = 9001;
29 | private FirebaseAuth mAuth;
30 | private GoogleApiClient mGoogleApiClient;
31 |
32 | @Override
33 | protected void onCreate(Bundle savedInstanceState) {
34 | super.onCreate(savedInstanceState);
35 | setContentView(R.layout.activity_signin);
36 | mAuth = FirebaseAuth.getInstance();
37 |
38 | SignInButton signInButton = findViewById(R.id.sign_in_button);
39 | signInButton.setSize(SignInButton.SIZE_WIDE);
40 | signInButton.setOnClickListener(this);
41 | }
42 |
43 | @Override
44 | protected void onStart() {
45 | super.onStart();
46 | if (mAuth.getCurrentUser() != null) {
47 | MyHelper.redirect(this, MainActivity.class);
48 | }
49 | }
50 |
51 | @Override
52 | protected void onActivityResult(int requestCode, int resultCode, Intent data) {
53 | super.onActivityResult(requestCode, resultCode, data);
54 | if (resultCode == RESULT_OK && requestCode == RC_SIGN_IN) {
55 | GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
56 | if (result.isSuccess()) {
57 | firebaseAuthWithGoogle(result.getSignInAccount());
58 | } else {
59 | Toast.makeText(this, result.getStatus().getStatusMessage(), Toast.LENGTH_SHORT).show();
60 | }
61 | }
62 | }
63 |
64 | @Override
65 | public void onClick(View view) {
66 | if (view.getId() == R.id.sign_in_button) {
67 | if (mGoogleApiClient == null) {
68 | mGoogleApiClient = buildGoogleSignIn();
69 | }
70 | Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
71 | startActivityForResult(signInIntent, RC_SIGN_IN);
72 | }
73 | }
74 |
75 | @Override
76 | public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
77 | Toast.makeText(this, connectionResult.getErrorMessage(), Toast.LENGTH_SHORT).show();
78 | }
79 |
80 | private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
81 | MyHelper.showDialog(this);
82 | AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
83 | mAuth.signInWithCredential(credential).addOnCompleteListener(this, new OnCompleteListener() {
84 | @Override
85 | public void onComplete(@NonNull Task task) {
86 | if (task.isSuccessful()) {
87 | FirebaseUser firebaser = mAuth.getCurrentUser();
88 | User user = new User(
89 | firebaser.getEmail(),
90 | firebaser.getDisplayName(),
91 | firebaser.getPhotoUrl().toString(),
92 | true
93 | );
94 | FirebaseDatabase.getInstance().getReference().child("users").child(firebaser.getUid()).setValue(user);
95 | MyHelper.dismissDialog();
96 | MyHelper.redirect(SigninActivity.this, MainActivity.class);
97 | } else {
98 | MyHelper.dismissDialog();
99 | //noinspection ThrowableResultOfMethodCallIgnored,ConstantConditions
100 | Toast.makeText(SigninActivity.this, task.getException().getMessage(), Toast.LENGTH_SHORT).show();
101 | }
102 | }
103 | });
104 | }
105 |
106 | public GoogleApiClient buildGoogleSignIn() {
107 | GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
108 | .requestIdToken(getString(R.string.default_web_client_id))
109 | .requestEmail()
110 | .build();
111 | return new GoogleApiClient.Builder(this)
112 | .enableAutoManage(this, this)
113 | .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
114 | .build();
115 | }
116 | }
--------------------------------------------------------------------------------
/gradlew:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env bash
2 |
3 | ##############################################################################
4 | ##
5 | ## Gradle start up script for UN*X
6 | ##
7 | ##############################################################################
8 |
9 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
10 | DEFAULT_JVM_OPTS=""
11 |
12 | APP_NAME="Gradle"
13 | APP_BASE_NAME=`basename "$0"`
14 |
15 | # Use the maximum available, or set MAX_FD != -1 to use that value.
16 | MAX_FD="maximum"
17 |
18 | warn ( ) {
19 | echo "$*"
20 | }
21 |
22 | die ( ) {
23 | echo
24 | echo "$*"
25 | echo
26 | exit 1
27 | }
28 |
29 | # OS specific support (must be 'true' or 'false').
30 | cygwin=false
31 | msys=false
32 | darwin=false
33 | case "`uname`" in
34 | CYGWIN* )
35 | cygwin=true
36 | ;;
37 | Darwin* )
38 | darwin=true
39 | ;;
40 | MINGW* )
41 | msys=true
42 | ;;
43 | esac
44 |
45 | # Attempt to set APP_HOME
46 | # Resolve links: $0 may be a link
47 | PRG="$0"
48 | # Need this for relative symlinks.
49 | while [ -h "$PRG" ] ; do
50 | ls=`ls -ld "$PRG"`
51 | link=`expr "$ls" : '.*-> \(.*\)$'`
52 | if expr "$link" : '/.*' > /dev/null; then
53 | PRG="$link"
54 | else
55 | PRG=`dirname "$PRG"`"/$link"
56 | fi
57 | done
58 | SAVED="`pwd`"
59 | cd "`dirname \"$PRG\"`/" >/dev/null
60 | APP_HOME="`pwd -P`"
61 | cd "$SAVED" >/dev/null
62 |
63 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
64 |
65 | # Determine the Java command to use to start the JVM.
66 | if [ -n "$JAVA_HOME" ] ; then
67 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
68 | # IBM's JDK on AIX uses strange locations for the executables
69 | JAVACMD="$JAVA_HOME/jre/sh/java"
70 | else
71 | JAVACMD="$JAVA_HOME/bin/java"
72 | fi
73 | if [ ! -x "$JAVACMD" ] ; then
74 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
75 |
76 | Please set the JAVA_HOME variable in your environment to match the
77 | location of your Java installation."
78 | fi
79 | else
80 | JAVACMD="java"
81 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
82 |
83 | Please set the JAVA_HOME variable in your environment to match the
84 | location of your Java installation."
85 | fi
86 |
87 | # Increase the maximum file descriptors if we can.
88 | if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
89 | MAX_FD_LIMIT=`ulimit -H -n`
90 | if [ $? -eq 0 ] ; then
91 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
92 | MAX_FD="$MAX_FD_LIMIT"
93 | fi
94 | ulimit -n $MAX_FD
95 | if [ $? -ne 0 ] ; then
96 | warn "Could not set maximum file descriptor limit: $MAX_FD"
97 | fi
98 | else
99 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
100 | fi
101 | fi
102 |
103 | # For Darwin, add options to specify how the application appears in the dock
104 | if $darwin; then
105 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
106 | fi
107 |
108 | # For Cygwin, switch paths to Windows format before running java
109 | if $cygwin ; then
110 | APP_HOME=`cygpath --path --mixed "$APP_HOME"`
111 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
112 | JAVACMD=`cygpath --unix "$JAVACMD"`
113 |
114 | # We build the pattern for arguments to be converted via cygpath
115 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
116 | SEP=""
117 | for dir in $ROOTDIRSRAW ; do
118 | ROOTDIRS="$ROOTDIRS$SEP$dir"
119 | SEP="|"
120 | done
121 | OURCYGPATTERN="(^($ROOTDIRS))"
122 | # Add a user-defined pattern to the cygpath arguments
123 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then
124 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
125 | fi
126 | # Now convert the arguments - kludge to limit ourselves to /bin/sh
127 | i=0
128 | for arg in "$@" ; do
129 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
130 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option
131 |
132 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
133 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
134 | else
135 | eval `echo args$i`="\"$arg\""
136 | fi
137 | i=$((i+1))
138 | done
139 | case $i in
140 | (0) set -- ;;
141 | (1) set -- "$args0" ;;
142 | (2) set -- "$args0" "$args1" ;;
143 | (3) set -- "$args0" "$args1" "$args2" ;;
144 | (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
145 | (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
146 | (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
147 | (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
148 | (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
149 | (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
150 | esac
151 | fi
152 |
153 | # Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
154 | function splitJvmOpts() {
155 | JVM_OPTS=("$@")
156 | }
157 | eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
158 | JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
159 |
160 | exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
161 |
--------------------------------------------------------------------------------
/app/src/main/java/com/firebase/devday/ListActivity.java:
--------------------------------------------------------------------------------
1 | package com.firebase.devday;
2 |
3 | import android.content.Context;
4 | import android.content.DialogInterface;
5 | import android.content.Intent;
6 | import android.os.Bundle;
7 | import androidx.appcompat.app.AlertDialog;
8 | import androidx.appcompat.app.AppCompatActivity;
9 | import androidx.recyclerview.widget.LinearLayoutManager;
10 | import androidx.recyclerview.widget.RecyclerView;
11 | import android.util.Log;
12 | import android.view.LayoutInflater;
13 | import android.view.View;
14 | import android.view.ViewGroup;
15 | import android.widget.ImageView;
16 | import android.widget.TextView;
17 | import android.widget.Toast;
18 |
19 | import com.firebase.devday.configs.GlideApp;
20 | import com.firebase.devday.helpers.MyHelper;
21 | import com.firebase.devday.models.Topic;
22 | import com.google.firebase.auth.FirebaseAuth;
23 | import com.google.firebase.auth.FirebaseUser;
24 | import com.google.firebase.database.ChildEventListener;
25 | import com.google.firebase.database.DataSnapshot;
26 | import com.google.firebase.database.DatabaseError;
27 | import com.google.firebase.database.DatabaseReference;
28 | import com.google.firebase.database.FirebaseDatabase;
29 | import com.google.firebase.database.Query;
30 | import com.google.firebase.database.ValueEventListener;
31 |
32 | import java.util.ArrayList;
33 | import java.util.HashMap;
34 | import java.util.List;
35 | import java.util.Map;
36 |
37 | public class ListActivity extends AppCompatActivity implements View.OnClickListener{
38 | private static final String TAG = "ListActivity";
39 | private Query mQuery;
40 | private RecyclerView mRecycler;
41 | private TopicAdapter mAdapter;
42 | private DatabaseReference mDatabase;
43 |
44 | @Override
45 | protected void onCreate(Bundle savedInstanceState) {
46 | super.onCreate(savedInstanceState);
47 | setContentView(R.layout.fragment_all_topics);
48 | findViewById(R.id.fab).setOnClickListener(this);
49 |
50 | mRecycler = findViewById(R.id.topic_list);
51 | mRecycler.setHasFixedSize(true);
52 | LinearLayoutManager mManager = new LinearLayoutManager(this);
53 | //mManager.setReverseLayout(true);
54 | //mManager.setStackFromEnd(true);
55 | mRecycler.setLayoutManager(mManager);
56 |
57 | mDatabase = FirebaseDatabase.getInstance().getReference();
58 |
59 | /* Ordering */
60 | mQuery = mDatabase.child("topics");
61 | // orderByKey()
62 | //mQuery = mQuery.orderByChild("voteCount");
63 |
64 |
65 | /* Filtering */
66 | //mQuery = mQuery.limitToFirst(3);
67 | //mQuery = mQuery.limitToLast(3);
68 | //mQuery = mQuery.equalTo("Firebase Dev Day BKK");
69 | //mQuery = mQuery.startAt("Firebase Realtime Database");
70 | //mQuery = mQuery.startAt(50);
71 | //mQuery = mQuery.endAt(50);
72 | //mQuery = mQuery.startAt(50).limitToFirst(2);
73 | }
74 |
75 | @Override
76 | protected void onStart() {
77 | super.onStart();
78 | mAdapter = new TopicAdapter(this, mQuery);
79 | mRecycler.setAdapter(mAdapter);
80 | }
81 |
82 | @Override
83 | public void onStop() {
84 | super.onStop();
85 | mAdapter.cleanupListener();
86 | }
87 |
88 | @Override
89 | public void onClick(View view) {
90 | switch (view.getId()) {
91 | case R.id.fab:
92 | FirebaseUser firebaser = FirebaseAuth.getInstance().getCurrentUser();
93 |
94 | String uid = firebaser.getUid();
95 | String avatar = firebaser.getPhotoUrl().toString();
96 | String speaker = "Jirawatee";
97 | String picture = "https://pbs.twimg.com/media/C4yDZ6QUkAEJ0ZW.jpg";
98 | String title = "Hello World!";
99 | String body = "Geek Alert!";
100 |
101 | final Topic topic = new Topic(uid, speaker, avatar, title, body, picture);
102 | Map topicValues = topic.toMap();
103 | Map childUpdates = new HashMap<>();
104 |
105 | String topicKey = mDatabase.push().getKey();
106 | childUpdates.put("/topics/" + topicKey, topicValues);
107 | childUpdates.put("/user-topics/" + uid + "/" + topicKey, topicValues);
108 |
109 | MyHelper.showDialog(this);
110 | mDatabase.updateChildren(childUpdates, new DatabaseReference.CompletionListener() {
111 | @Override
112 | public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
113 | MyHelper.dismissDialog();
114 | if (databaseError != null) {
115 | Toast.makeText(ListActivity.this, databaseError.getMessage(), Toast.LENGTH_SHORT).show();
116 | } else {
117 | Toast.makeText(ListActivity.this, "Added!", Toast.LENGTH_SHORT).show();
118 | }
119 | }
120 | });
121 | break;
122 | }
123 | }
124 |
125 | private static class TopicViewHolder extends RecyclerView.ViewHolder {
126 | ImageView avatar;
127 | TextView titleView, speakerView, voteView;
128 | TopicViewHolder(View itemView) {
129 | super(itemView);
130 | avatar = itemView.findViewById(R.id.avatar);
131 | titleView = itemView.findViewById(R.id.title);
132 | speakerView = itemView.findViewById(R.id.speaker);
133 | voteView = itemView.findViewById(R.id.vote);
134 | }
135 | }
136 |
137 | private class TopicAdapter extends RecyclerView.Adapter {
138 | private Context mContext;
139 | private Query mDatabaseReference;
140 | private ValueEventListener mValueEventListener;
141 | private ChildEventListener mChildEventListener;
142 | private List mTopicIds = new ArrayList<>();
143 | private List mTopics = new ArrayList<>();
144 |
145 | TopicAdapter(Context context, Query query) {
146 | mContext = context;
147 | mDatabaseReference = query;
148 | MyHelper.showDialog(mContext);
149 | mChildEventListener = new ChildEventListener() {
150 | @Override
151 | public void onChildAdded(DataSnapshot dataSnapshot, String previousChildName) {
152 | MyHelper.dismissDialog();
153 |
154 | Topic topic = dataSnapshot.getValue(Topic.class);
155 | Log.d("onChildAdded", topic.voteCount + ": " + topic.title);
156 |
157 | mTopicIds.add(dataSnapshot.getKey());
158 | mTopics.add(topic);
159 | notifyItemInserted(mTopics.size() - 1);
160 | }
161 |
162 | @Override
163 | public void onChildChanged(DataSnapshot dataSnapshot, String previousChildName) {
164 | MyHelper.dismissDialog();
165 |
166 | Topic newTopic = dataSnapshot.getValue(Topic.class);
167 | Log.d("onChildChanged", newTopic.title);
168 |
169 | String topicKey = dataSnapshot.getKey();
170 | int topicIndex = mTopicIds.indexOf(topicKey);
171 | if (topicIndex > -1) {
172 | mTopics.set(topicIndex, newTopic);
173 | notifyItemChanged(topicIndex);
174 | } else {
175 | Log.w(TAG, "onChildChanged:unknown_child:" + topicKey);
176 | }
177 | }
178 |
179 | @Override
180 | public void onChildRemoved(DataSnapshot dataSnapshot) {
181 | MyHelper.dismissDialog();
182 | Log.d("onChildRemoved", dataSnapshot.getKey());
183 |
184 | String topicKey = dataSnapshot.getKey();
185 | int topicIndex = mTopicIds.indexOf(topicKey);
186 | if (topicIndex > -1) {
187 | mTopicIds.remove(topicIndex);
188 | mTopics.remove(topicIndex);
189 | notifyItemRemoved(topicIndex);
190 | } else {
191 | Log.w(TAG, "onChildRemoved:unknown_child:" + topicKey);
192 | }
193 | }
194 |
195 | @Override
196 | public void onChildMoved(DataSnapshot dataSnapshot, String previousChildName) {
197 | MyHelper.dismissDialog();
198 | Log.d("onChildMoved", dataSnapshot.getKey());
199 | }
200 |
201 | @Override
202 | public void onCancelled(DatabaseError databaseError) {
203 | MyHelper.dismissDialog();
204 | Log.w(TAG, databaseError.toException());
205 | Toast.makeText(mContext, "Failed to load topics.", Toast.LENGTH_SHORT).show();
206 | }
207 | };
208 | query.addChildEventListener(mChildEventListener);
209 | }
210 |
211 | @Override
212 | public TopicViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
213 | LayoutInflater inflater = LayoutInflater.from(mContext);
214 | View view = inflater.inflate(R.layout.item_topic, parent, false);
215 | return new TopicViewHolder(view);
216 | }
217 |
218 | @Override
219 | public void onBindViewHolder(final TopicViewHolder holder, final int position) {
220 | final Topic topic = mTopics.get(position);
221 | holder.titleView.setText(topic.title);
222 | holder.speakerView.setText(topic.speaker);
223 | holder.voteView.setText(mContext.getString(R.string.vote, topic.voteCount));
224 | GlideApp.with(mContext).load(topic.avatar).circleCrop().error(R.mipmap.ic_launcher_round).into(holder.avatar);
225 |
226 | holder.itemView.setOnClickListener(new View.OnClickListener() {
227 | @Override
228 | public void onClick(View view) {
229 | Intent intent = new Intent(ListActivity.this, DetailActivity.class);
230 | intent.putExtra("topicKey", mTopicIds.get(holder.getAdapterPosition()));
231 | startActivity(intent);
232 | }
233 | });
234 |
235 | holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
236 | @Override
237 | public boolean onLongClick(View view) {
238 | String topicKey = mTopicIds.get(holder.getAdapterPosition());
239 | confirmDelete(topicKey, topic);
240 | return true;
241 | }
242 | });
243 | }
244 |
245 | @Override
246 | public int getItemCount() {
247 | return mTopics.size();
248 | }
249 |
250 | void cleanupListener() {
251 | if (mValueEventListener != null) {
252 | mDatabaseReference.removeEventListener(mValueEventListener);
253 | }
254 | if (mChildEventListener != null) {
255 | mDatabaseReference.removeEventListener(mChildEventListener);
256 | }
257 | }
258 |
259 | private void confirmDelete(final String topicKey, final Topic topic) {
260 | AlertDialog.Builder alert = new AlertDialog.Builder(mContext);
261 | alert.setMessage(getString(R.string.confirm_delete, topic.title));
262 | alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
263 | @Override
264 | public void onClick(DialogInterface dialogInterface, int i) {
265 | dialogInterface.dismiss();
266 | //mDatabase.child("topics").child(topicKey).setValue(null);
267 | //mDatabase.child("user-topics").child(topic.uid).child(topicKey).removeValue();
268 |
269 | Map childUpdates = new HashMap<>();
270 | childUpdates.put("/topics/" + topicKey, null);
271 | childUpdates.put("/user-topics/" + topic.uid + "/" + topicKey, null);
272 | FirebaseDatabase.getInstance().getReference().updateChildren(childUpdates);
273 | }
274 | });
275 | alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
276 | @Override
277 | public void onClick(DialogInterface dialogInterface, int i) {
278 | dialogInterface.dismiss();
279 | }
280 | });
281 | alert.setCancelable(true);
282 | alert.show();
283 | }
284 | }
285 | }
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