├── .gitignore ├── LICENSE.md ├── README.md ├── app ├── .gitignore ├── build.gradle ├── proguard-rules.txt └── src │ └── main │ ├── AndroidManifest.xml │ ├── java │ └── me │ │ └── tatarka │ │ └── timesync │ │ └── app │ │ ├── MainActivity.java │ │ ├── MyApplication.java │ │ └── RandomSync.java │ └── res │ ├── drawable-hdpi │ └── ic_launcher.png │ ├── drawable-mdpi │ └── ic_launcher.png │ ├── drawable-xhdpi │ └── ic_launcher.png │ ├── drawable-xxhdpi │ └── ic_launcher.png │ ├── layout │ └── activity_main.xml │ ├── menu │ └── main.xml │ ├── values-w820dp │ └── dimens.xml │ ├── values │ ├── dimens.xml │ ├── strings.xml │ └── styles.xml │ └── xml │ └── timesync.xml ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── lib ├── .gitignore ├── build.gradle ├── proguard-rules.txt └── src │ └── main │ ├── AndroidManifest.xml │ └── java │ └── me │ └── tatarka │ └── timesync │ └── lib │ ├── BooleanFormatException.java │ ├── EventCalculator.java │ ├── MathUtil.java │ ├── ReceiverUtils.java │ ├── SuperNotCalledException.java │ ├── TimeSync.java │ ├── TimeSyncBootReceiver.java │ ├── TimeSyncNetworkReceiver.java │ ├── TimeSyncParser.java │ ├── TimeSyncPowerReceiver.java │ ├── TimeSyncPreferences.java │ ├── TimeSyncProxy.java │ └── TimeSyncService.java └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | .gradle 2 | /local.properties 3 | .DS_Store 4 | *.iml 5 | .idea 6 | /build 7 | -------------------------------------------------------------------------------- /LICENSE.md: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | TimeSync 2 | ======== 3 | 4 | Android library for periodically syncing data to and from a server. 5 | 6 | This library is an alternative to a SyncAdapter. It is easier to set up, and doesn't require you to worry about accounts or content providers. 7 | 8 | Note: this library uses permissions `ACCESS_NETWORK_STATE`, `WAKE_LOCK`, and `RECEIVE_BOOT_COMPLETED`. 9 | 10 | #### Features 11 | - Periodically sync on a given interval in a battery-conscious way. 12 | - Turn off syncing when there is no network connection. 13 | - Randomly offset syncs so that they don't all hit the server at once. 14 | - Sync across apps using this library at the same time to reduce wakeups. 15 | - Retry on sync failure. 16 | 17 | ## Usage 18 | First create `MySync.java`. This will hold the logic of how your are syncing. 19 | 20 | ```java 21 | public class MySync extends TimeSync { 22 | @Override 23 | protected void onCreate(Context context) { 24 | super.onCreate(context); 25 | // This is called whenever MySync is created. 26 | } 27 | 28 | @Override 29 | public void onSync(Context context) throws Exception { 30 | // Implement you sync logic here. This will run on a 31 | // seperate thread and network is guaranteed to be available. 32 | // An exception represents a sync failure. 33 | } 34 | } 35 | ``` 36 | 37 | Then create `timesync.xml` in `res/xml`. This is where you put configuration for how and when syncs happen. You can define as many TimeSync classes as you want in here. 38 | 39 | ```xml 40 | 41 | 42 | 43 | 44 | 45 | ``` 46 | 47 | Then add a `meta-data` attribute to your `AndroidManifest`. 48 | 49 | ```xml 50 | 51 | ... 52 | 53 | 54 | ``` 55 | 56 | Finally, make sure you start TimeSync in your Application subclass. 57 | 58 | ```java 59 | public class MyApplication extends Application { 60 | @Override 61 | public void onCreate(Context context) { 62 | super.onCreate(context); 63 | TimeSync.start(context); 64 | } 65 | } 66 | ``` 67 | 68 | ## Running 69 | 70 | Your sync class will automatically run based on it's configuration. If you want to start it manually, you can do so as well. Note that this will be ignored if your sync class is disabled. 71 | 72 | ```java 73 | TimeSyncProxy mySync = TimeSync.get(context, MySync.class); 74 | mySync.sync(); 75 | ``` 76 | 77 | When running as a response to some event, a GCM message for example, you may want to ensure all devices don't hit your server at exactly the same time. In this case use 78 | 79 | ```java 80 | mySync.syncInexact(); 81 | ``` 82 | 83 | ## Configuration 84 | 85 | Configuration can either take place in xml, or at runtime, the second useful if you want to provide some user control. 86 | 87 | For xml use 88 | 89 | ```xml 90 | 91 | ``` 92 | 93 | - **enabled="true|false"** If the TimeSync is even enabled. If not, both periodic and explicit syncs will not be run. 94 | - **every="10 [second(s)|minute(s)|hour(s)|day(s)|year(s)]"** How often to sync periodically. If no unit is provided, it will be assumed milliseconds. The default is 0, which disables periodic syncing. 95 | - **range="5 [second(s)|minute(s)|hour(s)|day(s)|year(s)]"** The range of the random offset added to syncs so that they don't hit the server at exactly the same time. A sync will occur up to the given value after regularly scheduled. The default is 5 minutes. This is also used for `TimeSync.syncInexact()`. 96 | 97 | In code, use `TimeSyncProxy.edit(...)`. Setting values this way will override the xml config and be persisted across updates. 98 | 99 | ### Proguard 100 | 101 | ``` 102 | -keep class * extends me.tatarka.timesync.lib.TimeSync { *; } 103 | ``` 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | -------------------------------------------------------------------------------- /app/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | -------------------------------------------------------------------------------- /app/build.gradle: -------------------------------------------------------------------------------- 1 | apply plugin: 'com.android.application' 2 | 3 | android { 4 | compileSdkVersion 26 5 | buildToolsVersion "26.0.2" 6 | 7 | defaultConfig { 8 | minSdkVersion 14 9 | targetSdkVersion 26 10 | versionCode 1 11 | versionName "1.0" 12 | } 13 | 14 | compileOptions { 15 | sourceCompatibility JavaVersion.VERSION_1_7 16 | targetCompatibility JavaVersion.VERSION_1_7 17 | } 18 | 19 | buildTypes { 20 | release { 21 | minifyEnabled false 22 | proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt' 23 | } 24 | } 25 | } 26 | 27 | dependencies { 28 | compile 'com.android.support:appcompat-v7:26.1.0' 29 | compile project(':lib') 30 | } 31 | -------------------------------------------------------------------------------- /app/proguard-rules.txt: -------------------------------------------------------------------------------- 1 | # Add project specific ProGuard rules here. 2 | # By default, the flags in this file are appended to flags specified 3 | # in /opt/android-sdk/tools/proguard/proguard-android.txt 4 | # You can edit the include path and order by changing the ProGuard 5 | # include property in project.properties. 6 | # 7 | # For more details, see 8 | # http://developer.android.com/guide/developing/tools/proguard.html 9 | 10 | # Add any project specific keep options here: 11 | 12 | # If your project uses WebView with JS, uncomment the following 13 | # and specify the fully qualified class name to the JavaScript interface 14 | # class: 15 | #-keepclassmembers class fqcn.of.javascript.interface.for.webview { 16 | # public *; 17 | #} -------------------------------------------------------------------------------- /app/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 5 | 11 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | -------------------------------------------------------------------------------- /app/src/main/java/me/tatarka/timesync/app/MainActivity.java: -------------------------------------------------------------------------------- 1 | package me.tatarka.timesync.app; 2 | 3 | import android.app.Activity; 4 | import android.content.BroadcastReceiver; 5 | import android.content.Context; 6 | import android.content.Intent; 7 | import android.content.IntentFilter; 8 | import android.os.Bundle; 9 | import android.support.v4.content.LocalBroadcastManager; 10 | import android.view.Menu; 11 | import android.view.MenuItem; 12 | import android.view.View; 13 | import android.widget.Button; 14 | import android.widget.TextView; 15 | 16 | import me.tatarka.timesync.lib.TimeSync; 17 | import me.tatarka.timesync.lib.TimeSyncProxy; 18 | 19 | import static me.tatarka.timesync.lib.TimeSync.Edit.enable; 20 | 21 | 22 | public class MainActivity extends Activity { 23 | private TextView resultTextView; 24 | 25 | @Override 26 | protected void onCreate(Bundle savedInstanceState) { 27 | super.onCreate(savedInstanceState); 28 | setContentView(R.layout.activity_main); 29 | resultTextView = (TextView) findViewById(R.id.result_text_view); 30 | Button syncNow = (Button) findViewById(R.id.sync_now_button); 31 | Button syncSoon = (Button) findViewById(R.id.sync_soon_button); 32 | final Button toggle = (Button) findViewById(R.id.toggle_enabled_button); 33 | 34 | final TimeSyncProxy sync = TimeSync.get(this, RandomSync.class); 35 | 36 | syncNow.setOnClickListener(new View.OnClickListener() { 37 | @Override 38 | public void onClick(View v) { 39 | sync.sync(); 40 | } 41 | }); 42 | syncSoon.setOnClickListener(new View.OnClickListener() { 43 | @Override 44 | public void onClick(View v) { 45 | sync.syncInexact(); 46 | } 47 | }); 48 | 49 | toggle.setText("Toggle Enabled (" + (sync.config().enabled() ? "Enabled" : "Disabled") + ")"); 50 | toggle.setOnClickListener(new View.OnClickListener() { 51 | @Override 52 | public void onClick(View v) { 53 | sync.edit(enable(!sync.config().enabled())); 54 | toggle.setText("Toggle Enabled (" + (sync.config().enabled() ? "Enabled" : "Disabled") + ")"); 55 | } 56 | }); 57 | } 58 | 59 | @Override 60 | protected void onResume() { 61 | super.onResume(); 62 | IntentFilter filter = new IntentFilter(RandomSync.BROADCAST); 63 | LocalBroadcastManager.getInstance(this).registerReceiver(receiver, filter); 64 | } 65 | 66 | @Override 67 | protected void onPause() { 68 | super.onPause(); 69 | LocalBroadcastManager.getInstance(this).unregisterReceiver(receiver); 70 | } 71 | 72 | @Override 73 | public boolean onCreateOptionsMenu(Menu menu) { 74 | // Inflate the menu; this adds items to the action bar if it is present. 75 | getMenuInflater().inflate(R.menu.main, menu); 76 | return true; 77 | } 78 | 79 | @Override 80 | public boolean onOptionsItemSelected(MenuItem item) { 81 | // Handle action bar item clicks here. The action bar will 82 | // automatically handle clicks on the Home/Up button, so long 83 | // as you specify a parent activity in AndroidManifest.xml. 84 | int id = item.getItemId(); 85 | if (id == R.id.action_settings) { 86 | return true; 87 | } 88 | return super.onOptionsItemSelected(item); 89 | } 90 | 91 | private BroadcastReceiver receiver = new BroadcastReceiver() { 92 | @Override 93 | public void onReceive(Context context, Intent intent) { 94 | long result = intent.getLongExtra(RandomSync.EXTRA_RESULT, 0); 95 | resultTextView.setText("Result: " + result); 96 | } 97 | }; 98 | } 99 | -------------------------------------------------------------------------------- /app/src/main/java/me/tatarka/timesync/app/MyApplication.java: -------------------------------------------------------------------------------- 1 | package me.tatarka.timesync.app; 2 | 3 | import android.app.Application; 4 | 5 | import me.tatarka.timesync.lib.TimeSync; 6 | 7 | public class MyApplication extends Application { 8 | @Override 9 | public void onCreate() { 10 | super.onCreate(); 11 | TimeSync.start(this); 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /app/src/main/java/me/tatarka/timesync/app/RandomSync.java: -------------------------------------------------------------------------------- 1 | package me.tatarka.timesync.app; 2 | 3 | import android.content.Context; 4 | import android.content.Intent; 5 | import android.support.v4.content.LocalBroadcastManager; 6 | 7 | import java.util.Random; 8 | 9 | import me.tatarka.timesync.lib.TimeSync; 10 | 11 | public class RandomSync extends TimeSync { 12 | public static final String BROADCAST = RandomSync.class.getName(); 13 | public static final String EXTRA_RESULT = "result"; 14 | 15 | private Random random = new Random(); 16 | 17 | @Override 18 | public void onSync(Context context) throws Exception { 19 | long result = random.nextLong(); 20 | 21 | // if (random.nextInt(5) < 2) { 22 | // Log.d("TimeSync", "sync failed: " + System.currentTimeMillis()); 23 | // throw new Exception(); 24 | // } 25 | 26 | // Normally you would save to a database or file. For this example, it's just easier to 27 | // broadcast the result. 28 | Intent intent = new Intent(BROADCAST); 29 | intent.putExtra(EXTRA_RESULT, result); 30 | LocalBroadcastManager.getInstance(context).sendBroadcast(intent); 31 | } 32 | } 33 | -------------------------------------------------------------------------------- /app/src/main/res/drawable-hdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/evant/timesync/ca4164fbec5b15ce745109ba5bdc9f2f5104b18e/app/src/main/res/drawable-hdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-mdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/evant/timesync/ca4164fbec5b15ce745109ba5bdc9f2f5104b18e/app/src/main/res/drawable-mdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/evant/timesync/ca4164fbec5b15ce745109ba5bdc9f2f5104b18e/app/src/main/res/drawable-xhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/drawable-xxhdpi/ic_launcher.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/evant/timesync/ca4164fbec5b15ce745109ba5bdc9f2f5104b18e/app/src/main/res/drawable-xxhdpi/ic_launcher.png -------------------------------------------------------------------------------- /app/src/main/res/layout/activity_main.xml: -------------------------------------------------------------------------------- 1 | 11 | 12 | 16 |