App保活

最新推荐文章于 2025-06-06 10:19:12 发布

转载最新推荐文章于 2025-06-06 10:19:12 发布 · 255 阅读

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/huiyun/blog/1476079

本文介绍了一种通过两个Service相互绑定及监听链接状态来实现应用保活的方法。具体包括使用广播启动Service、在Service中进行相互绑定及启动，并通过Notification提高Service优先级。

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查看App是否保活成功：https://my.oschina.net/huiyun/blog/1476143

主要思路：主要是两个service的相互绑定，以及对链接状态的监听，一旦断开就重新启动和绑定。

通过Activity发送一个广播（OneReceiver），通过广播OneReceiver启动一个Service（MyService）

在MyService的onCreate()方法中初始化链接监听类【在Service里写一个类继承接口ServiceConnection，并在方法onServiceDisconnected()中启动OtherService并且与之绑定】

 在MyService的onStartCommand()方法绑定OtherService，并写一个Notification，用startForeground()方法启动在通知栏，即提高该Service的优先级。

 再创建一个OtherService（就是之前提到的），逻辑与MyService相同，唯一的不同就是在AndroidManifest.xml文件中注册时应将该服务现在另外的进程中，防止该App被kill时连带着OtherService也被kill，这样就无法实现相互唤醒了。

下面是主要的代码： MainActivity的代码：

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sendBroadcast(new Intent(this,MyReceiver.class));
    }
}

MyReceiver的代码：

public class MyReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent intent1 = new Intent(context,MyService.class);
        context.startService(intent1);
    }
}

MyService的代码：

public class MyService extends Service {
    private MyServiceConnection connection;
    private MyBinder binder;
    private PendingIntent pendingIntent;

    public MyService() {
    }

    @Override
    public void onCreate() {
        super.onCreate();
        connection = new MyServiceConnection();
        if (binder == null) {
            binder = new MyBinder();
        }
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        startService(new Intent(MyService.this, OtherService.class));
        bindService(new Intent(MyService.this, OtherService.class), connection, Context.BIND_IMPORTANT);
        //根据具体的项目需求改判断，这里假设是判断App是否
        if (isAppRunning()) {
            Intent main = new Intent(MyService.this,MainActivity.class);
            startActivity(main);
        }
        intent = new Intent(MyService.this, OtherReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(MyService.this, 0, intent, 0);
        Notification notification = new NotificationCompat.Builder(MyService.this)
                .setContentTitle("MyService提示:")
                .setContentText("MyService 的内容。。。。")
                .setContentIntent(pendingIntent)
                .setAutoCancel(false)
                .build();
        startForeground(startId, notification);
        return START_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }

    class MyBinder extends Binder {
    }

    class MyServiceConnection implements ServiceConnection {

        @Override
        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
            Log.d("SaveApp", "MyServiceConnection : Connected");
        }

        @Override
        public void onServiceDisconnected(ComponentName componentName) {
            Log.d("SaveApp", "MyServiceConnection : Disconnected");
            MyService.this.startService(new Intent(MyService.this,OtherService.class));
            MyService.this.bindService(new Intent(MyService.this,OtherService.class),connection,Context.BIND_IMPORTANT);
        }
    }

    public boolean isAppRunning() {
        ActivityManager am = (ActivityManager) getApplication().getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> list = am.getRunningTasks(100);
        for (ActivityManager.RunningTaskInfo info : list) {
            if (info.topActivity.getPackageName().equals("demo.jhc.cn.jpush") && info.baseActivity.getPackageName().equals("demo.jhc.cn.jpush")) {
                return true;
            }
        }
        return false;
    }
}

OtherService的代码：

public class OtherService extends Service {
    private OtherBinder binder;
    private OtherServiceConnection connection;
    private PendingIntent pendingIntent;

    public OtherService() {
    }

    @Override
    public void onCreate() {
        super.onCreate();
        connection = new OtherServiceConnection();
        if (binder == null) {
            binder = new OtherBinder();
        }
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        bindService(new Intent(OtherService.this, MyService.class), connection, Context.BIND_IMPORTANT);
        if (isAppRunning()) {
            intent = new Intent(OtherService.this, MainActivity.class);
        }
        pendingIntent = PendingIntent.getBroadcast(OtherService.this, 0, intent, 0);
        Notification notification = new NotificationCompat
                .Builder(this)
                .setContentTitle("OtherService title")
                .setContentText("OtherService content")
                .setSmallIcon(R.mipmap.ic_launcher)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .build();
        notification.flags |=  Notification.FLAG_NO_CLEAR;
        startForeground(startId, notification);
        return START_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }

    class OtherBinder extends Binder {
    }

    class OtherServiceConnection implements ServiceConnection {

        @Override
        public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
            Log.d("SaveApp", "MyServiceConnection : Connected");
        }

        @Override
        public void onServiceDisconnected(ComponentName componentName) {
            Log.d("SaveApp", "MyServiceConnection : Disconnected");
            OtherService.this.startService(new Intent(OtherService.this,MyService.class));
            OtherService.this.bindService(new Intent(OtherService.this,MyService.class),connection,Context.BIND_IMPORTANT);
        }
    }

OtherReceiver的代码：

public class OtherReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Toast.makeText(context,"Other Receiver : 模拟Jpush接收器",Toast.LENGTH_SHORT).show();
    }
}

转载于:https://my.oschina.net/huiyun/blog/1476079