android - 联想A600在应用程序被杀死后无法保持服务运行

Question

正如标题，我刚刚使用 Unbound Service 构建了一个应用程序，但它在 Lenovo A6000 上运行不正常，当我杀死应用程序时，我之前启动的服务也被关闭了。 但是 Facebook 中的服务、Messenger 应用程序可以在此设备上正常运行。 那么，我该怎么办呢？

Answer 1

嗨，Nam Nguyen & ADM，这里创建的服务在终止应用程序后在我的联想设备后台运行，

这里需要创建服务，一个是后台任务，一个是报警服务，在一段时间后不断检查你的服务，

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

/**
 * Created by DhavalSolanki on 30/3/17.
 */

public class ConnectionService extends Service {
    private final String TAG = getClass().getSimpleName();
    private Context context;

    @Override
    public IBinder onBind(Intent intent) {
        Log.i(TAG, "onBind");
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        context = getApplicationContext();
        return Service.START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public boolean onUnbind(Intent intent) {
        Log.i(TAG, "onUnbind");
        return super.onUnbind(intent);
    }

    @Override
    public void onDestroy() {
        Log.i(TAG, "onDestroy");
        super.onDestroy();
    }

}





import android.app.ActivityManager;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

/**
 * Created by DhavalSolanki on 30/3/17.
 */
public class AlarmService extends IntentService {
    @Override
    protected void onHandleIntent(Intent intent) {
        boolean isServiceRunning = false;
        ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
            if (ConnectionService.class.getName().equals(service.service.getClassName())) {
                isServiceRunning = true;
                break;
            }
        }
//        Logger.print("AlarmService", "Service is running " + isServiceRunning);
        if (!isServiceRunning) {
            startService(new Intent(getApplicationContext(), ConnectionService.class));
        } 
    }

    /**
     * Creates an IntentService.  Invoked by your subclass's constructor.
     */
    public AlarmService() {
        super("Alarm");
    }
}

在开始服务的地方写下面的代码

 private void checkAndStartService() {
        final ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        new AsyncTask<Void, Void, Boolean>() {
            boolean isServiceRunning = false;
            @Override
            protected Boolean doInBackground(Void... params) {
                for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
                    if (ConnectionService.class.getName().equals(service.service.getClassName())) {
                        isServiceRunning = true;
                        break;
                    }
                }
                return isServiceRunning;
            }

            @Override
            protected void onPostExecute(Boolean aBoolean) {
                super.onPostExecute(aBoolean);
                Log.i("onPostExecute", "Service running = " + aBoolean);
                if (!aBoolean) {

                    startService(new Intent(ActivitySplash.this, ConnectionService.class));
                    Intent i = new Intent(ActivitySplash.this, AlarmService.class);
                    PendingIntent pi = PendingIntent.getService(ActivitySplash.this, 0, i, 0);
                    AlarmManager am = (AlarmManager) ActivitySplash.this.getSystemService(Context.ALARM_SERVICE);
                    am.cancel(pi); // cancel any existing alarms
                    am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 10000, pi);
                }
            }
        }.execute();
    }

最后在 list 文件中注册这两个服务

       <service android:name=".services.ConnectionService"
            android:enabled="true"
            android:exported="false"
            android:stopWithTask="false" />
        <service
            android:name=".services.AlarmService"
            android:enabled="true" />