因此,我正在关注this tutorial,以在我的应用中实现服务。我成功实现了服务。服务已激活,并且通知正常显示。一切都很好,除了我无法在后台线程上工作。请参见下面。
我的目标是设置模拟位置。
这是我为我的服务onStartCommand
:
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,
0, notificationIntent, 0);
Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
.setContentTitle("Example Service")
.setContentText("hi")
.setSmallIcon(R.drawable.icon)
.setContentIntent(pendingIntent)
.build();
startForeground(1, notification);
//do work on a background thread
new Thread(new Runnable() {
@Override
public void run() {
startMockLocation(); // doesn't actually mock device's location!
}
}).start();
return START_NOT_STICKY;
}
但是,当我这样做时,它可以正常工作,但是效率不高:
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this,
0, notificationIntent, 0);
Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
.setContentTitle("Example Service")
.setContentText("hi")
.setSmallIcon(R.drawable.icon)
.setContentIntent(pendingIntent)
.build();
startForeground(1, notification);
// works great
timer.schedule(new TimerTask() {
@Override
public void run() {
startMockLocation();
//other stuff
}
}, 0, 1000);
return START_NOT_STICKY;
}
模拟定位方法:
public void startMockLocation(){ // this code is fine, nothing to fix here, something is wrong with the thread though :(
FusedLocationProviderClient locationProvider = new FusedLocationProviderClient(getApplicationContext());
locationProvider.setMockMode(true);
Location loc = new Location("gps");
Location mockLocation = new Location("gps"); // a string
mockLocation.setLatitude(48.8566);
mockLocation.setLongitude(2.3522);
mockLocation.setAltitude(loc.getAltitude());
mockLocation.setTime(System.currentTimeMillis());
mockLocation.setAccuracy(1f);
mockLocation.setElapsedRealtimeNanos(SystemClock.elapsedRealtimeNanos());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
mockLocation.setBearingAccuracyDegrees(0.1f);
mockLocation.setVerticalAccuracyMeters(0.1f);
mockLocation.setSpeedAccuracyMetersPerSecond(0.01f);
}
locationProvider.setMockLocation(mockLocation);
}
答案 0 :(得分:3)
如果无法在后台线程中工作,则意味着您看不到startMockLocation()的效果,这取决于是否有任何计算依赖于startMockLocation()。如果您不加入线程或在某处阻塞,而是等待后台线程完成,则主线程可能会运行良好直到终止,直到后台线程完成其工作为止。看起来您的后台线程没有执行任何操作。