当点击电源按钮时，进程被Android操作系统终止

Question

Env：-Android6.0，华为智能手机

我的应用程序是一个IM客户端，它必须与服务器保持连接并从服务器接收消息。因此，只要网络连接可用，我就必须让它一直处于活动状态。

我使用前台服务使我的应用程序在后台保持活动状态。请参阅：android-keeping-a-background-service-alive-prevention-process-death此方法在android 4.1和4.4上运行良好。但它在Android5.1和6.0上失败了。单击电源按钮约10秒后，应用程序进程被终止。

以下是重新制作的步骤。这是一个简单的演示应用程序，它启动一个线程来跟踪进程是终止的还是活动的。

>

使用活动启动android应用程序

启动日志线程，每秒记录一条消息

重写服务onStartCommand（）方法，调用startForeground（）并显示通知；

点击按钮启动服务；

等待约10秒，日志记录线程停止；

单击应用程序图标再次启动应用程序；

注意：我注意到一件奇怪的事情：当应用程序再次启动时，不会调用活动的onCreate（）！

任何帮助都很感激！提前感谢！

以下是启动服务的代码：

    @Override
public int onStartCommand(Intent intent, int flags, int startId) {
    AppGlobal.logDebug(">>>> onStartCommand()");
    if (intent.getAction().equals(Constants.ACTION.STARTFOREGROUND_ACTION)) {
        Log.i(LOG_TAG, "==== Received Start Foreground Intent ");
        showNotification();
        Toast.makeText(this, "Service Started!", Toast.LENGTH_SHORT).show();

    } else if (intent.getAction().equals(Constants.ACTION.PREV_ACTION)) {
        Log.i(LOG_TAG, "Clicked Previous");

        Toast.makeText(this, "Clicked Previous!", Toast.LENGTH_SHORT)
                .show();
    } else if (intent.getAction().equals(Constants.ACTION.PLAY_ACTION)) {
        Log.i(LOG_TAG, "Clicked Play");

        Toast.makeText(this, "Clicked Play!", Toast.LENGTH_SHORT).show();
    } else if (intent.getAction().equals(Constants.ACTION.NEXT_ACTION)) {
        Log.i(LOG_TAG, "Clicked Next");

        Toast.makeText(this, "Clicked Next!", Toast.LENGTH_SHORT).show();
    } else if (intent.getAction().equals(
            Constants.ACTION.STOPFOREGROUND_ACTION)) {
        Log.i(LOG_TAG, "==== Received Stop Foreground Intent");
        stopForeground(true);
        stopSelf();
    }
    return START_STICKY;
}


private void showNotification() {
    AppGlobal.logDebug(">>>> show notification");
    Intent notificationIntent = new Intent(this, StTest33MainActivity.class);
    notificationIntent.setAction(Constants.ACTION.MAIN_ACTION);
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
            | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
            notificationIntent, 0);

    Intent previousIntent = new Intent(this, ForegroundService.class);
    previousIntent.setAction(Constants.ACTION.PREV_ACTION);
    PendingIntent ppreviousIntent = PendingIntent.getService(this, 0,
            previousIntent, 0);

    Intent playIntent = new Intent(this, ForegroundService.class);
    playIntent.setAction(Constants.ACTION.PLAY_ACTION);
    PendingIntent pplayIntent = PendingIntent.getService(this, 0,
            playIntent, 0);

    Intent nextIntent = new Intent(this, ForegroundService.class);
    nextIntent.setAction(Constants.ACTION.NEXT_ACTION);
    PendingIntent pnextIntent = PendingIntent.getService(this, 0,
            nextIntent, 0);

    Bitmap icon = BitmapFactory.decodeResource(getResources(),
            R.drawable.ic_launcher);

    Notification notification = new NotificationCompat.Builder(this)
            .setContentTitle("TutorialsFace Music Player")
            .setTicker("TutorialsFace Music Player")
            .setContentText("My song")
            .setSmallIcon(R.drawable.ic_launcher)
            .setLargeIcon(Bitmap.createScaledBitmap(icon, 128, 128, false))
            .setContentIntent(pendingIntent)
            .setOngoing(true)
            .addAction(android.R.drawable.ic_media_previous, "Previous",
                    ppreviousIntent)
            .addAction(android.R.drawable.ic_media_play, "Play",
                    pplayIntent)
            .addAction(android.R.drawable.ic_media_next, "Next",
                    pnextIntent).build();
    startForeground(Constants.NOTIFICATION_ID.FOREGROUND_SERVICE,
            notification);

}

Answer 1

如果进程处于睡眠模式时未被列为受保护的应用程序，华为将停止该进程。转到“设置”-