Mys*_*icϡ 52 android android-service
我有一点问题.
在我的应用程序中,在用户成功登录后启动服务.以前,如果应用程序被杀,该服务需要停止.(比如,通过滑动从最近的应用程序列表中删除.)所以我们使用过android:stopWithTask="true".现在我们需要服务按原样运行,即使启动它的任务从最近的应用程序列表中删除.所以我把服务改为包含android:stopWithTask="false".但这似乎不起作用.
相关代码:
这是与服务相关的明显部分:
<service
android:enabled="true"
android:name=".MyService"
android:exported="false"
android:stopWithTask="false" />
在MyService.java中:
public class MyService extends AbstractService {
@Override
public void onStartService() {
Intent intent = new Intent(this, MyActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
Notification notification = new Notification(R.drawable.ic_launcher, "My network services", System.currentTimeMillis());
notification.setLatestEventInfo(this, "AppName", "Message", pendingIntent);
startForeground(MY_NOTIFICATION_ID, notification);
}
@Override
public void onTaskRemoved(Intent rootIntent) {
Toast.makeText(getApplicationContext(), "onTaskRemoved called", Toast.LENGTH_LONG).show();
System.out.println("onTaskRemoved called");
super.onTaskRemoved(rootIntent);
}
}
AbstractService.java是扩展的自定义类Sevrice:
public abstract class AbstractService extends Service {
protected final String TAG = this.getClass().getName();
@Override
public void onCreate() {
super.onCreate();
onStartService();
Log.i(TAG, "onCreate(): Service Started.");
}
@Override
public final int onStartCommand(Intent intent, int flags, int startId) {
Log.i(TAG, "onStarCommand(): Received id " + startId + ": " + intent);
return START_STICKY; // run until explicitly stopped.
}
@Override
public final IBinder onBind(Intent intent) {
return m_messenger.getBinder();
}
@Override
public void onDestroy() {
super.onDestroy();
onStopService();
Log.i(TAG, "Service Stopped.");
}
public abstract void onStartService();
public abstract void onStopService();
public abstract void onReceiveMessage(Message msg);
@Override
public void onTaskRemoved(Intent rootIntent) {
Toast.makeText(getApplicationContext(), "AS onTaskRemoved called", Toast.LENGTH_LONG).show();
super.onTaskRemoved(rootIntent);
}
}
现在,如果我登录应用程序,MyService就会启动.之后我按Home键,因此应用程序移至后台.现在我从Recent Application的列表中删除该应用程序.那时,我应该看到Toast和console消息,按照这个方法的描述:
public void onTaskRemoved(Intent rootIntent)
在API级别14中添加
如果服务当前正在运行且用户已从服务的应用程序中删除了任务,则会调用此方法.如果您已设置ServiceInfo.FLAG_STOP_WITH_TASK,那么您将不会收到此回调; 相反,该服务将被停止.
参数rootIntent用于启动要删除的任务的原始根Intent.
但我没有看到任何这一点.服务正在返回START_STICKY onStartCommand,所以我认为onTaskRemoved应该与旗帜一起解雇android:stopWithTask="false".
我错过了什么吗？
让我知道,以防我需要添加一些代码,这些代码可能对于弄清楚什么是错误很重要.
PS:到目前为止我在4.2.2上测试了这个.
PS:我刚刚测试了4.1.2中的相同代码,服务一直在运行,我在日志中也得到了"onTaskRemoved called"消息.
我该怎么做才能在所有版本中使用它？
Avn*_*ary 31
只需按照这些方案,您的服务和流程(在服务中运行的线程)将保持连续.
创建服务并在onStartCommand方法中使用START_STICKY作为返回值,如下所示
@Override
public int onStartCommand(final Intent intent,
final int flags,
final int startId) {
//your code
return START_STICKY;
}
上面的代码将在销毁时重新启动服务并始终保持运行,但如果您的应用程序已从最近的应用程序中删除,则从该服务运行的进程(线程)将停止工作.要确保您的进程(线程)始终处于运行状态,您必须覆盖onTaskRemoved()方法并添加代码以重启任务,如下所示.
@Override
public void onTaskRemoved(Intent rootIntent){
Intent restartServiceTask = new Intent(getApplicationContext(),this.getClass());
restartServiceTask.setPackage(getPackageName());
PendingIntent restartPendingIntent =PendingIntent.getService(getApplicationContext(), 1,restartServiceTask, PendingIntent.FLAG_ONE_SHOT);
AlarmManager myAlarmService = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
myAlarmService.set(
AlarmManager.ELAPSED_REALTIME,
SystemClock.elapsedRealtime() + 1000,
restartPendingIntent);
super.onTaskRemoved(rootIntent);
}
startService(new Intent(this,YourService.class));
在您的服务中,添加以下代码.4.4.2对我来说很好
这是我遇到的一种解决方法,如果在关闭应用程序时它的进程被终止,则可以很好地重新启动服务.
@Override public void onTaskRemoved(Intent rootIntent){
Intent restartServiceIntent = new Intent(getApplicationContext(), this.getClass());
PendingIntent restartServicePendingIntent = PendingIntent.getService(
getApplicationContext(), 1, restartServiceIntent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager alarmService = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmService.set(ELAPSED_REALTIME, elapsedRealtime() + 1000,
restartServicePendingIntent);
super.onTaskRemoved(rootIntent);
}
naw*_*aab -4
oncreate()写下我在服务类中添加的5行
像这样：
public class AlarmService extends Service {
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Intent iHeartBeatService = new Intent(AlarmService.this,
AlarmService.class);
PendingIntent piHeartBeatService = PendingIntent.getService(this, 0,
iHeartBeatService, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(piHeartBeatService);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis(), 1000, piHeartBeatService);
}
}
或者
试试这个
public class MyService extends Service{
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
System.out.println("service created");
}
@SuppressLint("NewApi")
@Override
public void onTaskRemoved(Intent rootIntent) {
// TODO Auto-generated method stub
System.out.println("onTaskRemoved");
super.onTaskRemoved(rootIntent);
}
@Override
@Deprecated
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
System.out.println("Service started");
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
System.out.println("Service is running");
}
}, 5000);
}
}
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