我有一个每30分钟触发一次IntentService的AlarmManager,这个意图服务每次都会获取用户的位置。我有2种获取位置的方法:首先它检查getLastKnownLocation(),如果它在最后2分钟内使用它,这部分完美地运行。
第二种方式是如果最后一个位置是旧的或返回null,我想在其中获取一次新位置。出于某种原因,这永远不会调用onLocationChanged()。这导致我的IntentService在很多时候都没有返回坐标,只有在getLastKnownLocation()是最近的时才返回它们。
这是我的代码如何设置,为什么如果我想获得一个新的位置,它永远不会被调用?检查代码中的注释,以查看调用的内容和从未调用过的内容。
LocationListener locationListener;
LocationManager locationManager;
private final double MIN_COORD_DIFF = 0.0006;
public CoordinateAlarmReceiver(){
super("CoordinateAlarmReceiver");
}
@Override
protected void onHandleIntent(Intent intent) {
//THIS IS CALLED CORRECTLY
MyLog.i("coordinate alarm received");
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location lastLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
//if last location was in past 2 minutes, use that
if(lastLocation != null && lastLocation.getTime() > Calendar.getInstance().getTimeInMillis() - 2 * 60 * 1000) {
//THIS IS CALLED CORRECTLY
storeLocation(lastLocation);
MyLog.i("Last location was recent, using that");
}
else { //otherwise get new location
//THIS IS CALLED CORRECTLY
MyLog.i("Last location was old, getting new location");
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
//THIS IS NEVER CALLED
MyLog.i("Got new coordinates");
storeLocation(location);
locationManager.removeUpdates(this);
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
};
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
}
}
答案 0 :(得分:1)
您应该使用服务而不是IntentService。完成任务后,IntentService完成,但服务正在运行并且可以监听位置更改事件。尝试使用服务。
希望它可以帮到你!!