我对这里提出的问题有类似的问题: Sending message to a Handler on a dead thread when getting a location from an IntentService
我把一个LocationListener放在一个IntentService中,我听说这是一个不好的地方,因为在onHandleIntent()
完成后监听器被销毁了。
我的意向服务根据GPS和网络提供商检查最后的已知位置。我正在寻找一种方法来“唤醒”GPS和网络定位器,然后再检查用户所在的位置。
IntentService每分钟运行一次,每5-30分钟检查一次更新的位置。有没有办法在实际位置检查之前设置我可以调用的requestLocationUpdates
?
12-31 14:09:33.664: W/MessageQueue(3264): Handler (android.location.LocationManager$ListenerTransport$1) {41403330} sending message to a Handler on a dead thread
12-31 14:09:33.664: W/MessageQueue(3264): java.lang.RuntimeException: Handler (android.location.LocationManager$ListenerTransport$1) {41403330} sending message to a Handler on a dead thread
12-31 14:09:33.664: W/MessageQueue(3264): at android.os.MessageQueue.enqueueMessage(MessageQueue.java:196)
12-31 14:09:33.664: W/MessageQueue(3264): at android.os.Handler.sendMessageAtTime(Handler.java:473)
12-31 14:09:33.664: W/MessageQueue(3264): at android.os.Handler.sendMessageDelayed(Handler.java:446)
12-31 14:09:33.664: W/MessageQueue(3264): at android.os.Handler.sendMessage(Handler.java:383)
12-31 14:09:33.664: W/MessageQueue(3264): at android.location.LocationManager$ListenerTransport.onLocationChanged(LocationManager.java:193)
12-31 14:09:33.664: W/MessageQueue(3264): at android.location.ILocationListener$Stub.onTransact(ILocationListener.java:58)
12-31 14:09:33.664: W/MessageQueue(3264): at android.os.Binder.execTransact(Binder.java:338)
12-31 14:09:33.664: W/MessageQueue(3264): at dalvik.system.NativeStart.run(Native Method)
ScheduledService
public class ScheduledService extends IntentService {
private LocationManager lm;
LocationListener locationListener;
public ScheduledService() {
super("ScheduledService");
}
@Override
protected void onHandleIntent(Intent intent) {
lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
lm.removeUpdates(this);
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
if(isNetworkAvailable()) {
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
try {
Location lastKnownLocation = getBestLocation();
double lat = lastKnownLocation.getLatitude();
double lon = lastKnownLocation.getLongitude();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
答案 0 :(得分:0)
更新:我不确定,但我相信我选择了不同的选项并将LocationListener移出IntentService,因为它在onHandleIntent()完成后被销毁。
我刚刚意识到我不知道如何正确编写这段代码,所以我去寻找一个能够完成我需要的库。这是一个起点。我为它添加了书签,因为我发现它很有用:Good way of getting the user's location in Android