当我试图阻止我的gsp监听器时，我被迫关闭
这是代码：
mlocManager.removeUpdates(mlocListener);
mlocManager = null;
还有这个：
LocationManager mlocManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
(long) update, 0, mlocListener);
请帮助我，我不明白为什么它会强制关闭。
07-30 11:43:39.557: D/AndroidRuntime(1071): Shutting down VM
07-30 11:43:39.557: W/dalvikvm(1071): threadid=1: thread exiting with uncaught exception (group=0x40015560)
07-30 11:43:39.575: E/AndroidRuntime(1071): FATAL EXCEPTION: main
07-30 11:43:39.575: E/AndroidRuntime(1071): java.lang.NullPointerException
07-30 11:43:39.575: E/AndroidRuntime(1071): at com.example.anotheractivity.Festivale$1.onClick(Festivale.java:109)
07-30 11:43:39.575: E/AndroidRuntime(1071): at android.view.View.performClick(View.java:2485)
07-30 11:43:39.575: E/AndroidRuntime(1071): at android.view.View$PerformClick.run(View.java:9080)
07-30 11:43:39.575: E/AndroidRuntime(1071): at android.os.Handler.handleCallback(Handler.java:587)
07-30 11:43:39.575: E/AndroidRuntime(1071): at android.os.Handler.dispatchMessage(Handler.java:92)
07-30 11:43:39.575: E/AndroidRuntime(1071): at android.os.Looper.loop(Looper.java:123)
07-30 11:43:39.575: E/AndroidRuntime(1071): at android.app.ActivityThread.main(ActivityThread.java:3683)
07-30 11:43:39.575: E/AndroidRuntime(1071): at java.lang.reflect.Method.invokeNative(Native Method)
07-30 11:43:39.575: E/AndroidRuntime(1071): at java.lang.reflect.Method.invoke(Method.java:507)
07-30 11:43:39.575: E/AndroidRuntime(1071): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
07-30 11:43:39.575: E/AndroidRuntime(1071): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
07-30 11:43:39.575: E/AndroidRuntime(1071): at dalvik.system.NativeStart.main(Native Method)
07-30 11:43:41.565: I/Process(1071): Sending signal. PID: 1071 SIG: 9
最佳答案
我为此提供了一项服务。使用它很容易获得经度/纬度。
将此类复制/粘贴到您的项目中。
包com.sample;
导入com.sample.globalconstant;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class MyServiceGPS extends Service
{
private static final String TAG = "BOOMBOOMTESTGPS";
private LocationManager mLocationManager = null;
private static final int LOCATION_INTERVAL = 1000;
private static final float LOCATION_DISTANCE = 10f;
private class LocationListener implements android.location.LocationListener{
Location mLastLocation;
public LocationListener(String provider)
{
Log.e(TAG, "LocationListener " + provider);
mLastLocation = new Location(provider);
}
public void onLocationChanged(Location location)
{
Log.e(TAG, "onLocationChanged: " + location.getLatitude() +"....."+ location.getLongitude());
globalconstant.lat = location.getLatitude();
globalconstant.lon = location.getLongitude();
Toast.makeText(getApplicationContext(), location.getLatitude() +"....."+ location.getLongitude(), 1000).show();
mLastLocation.set(location);
}
public void onProviderDisabled(String provider)
{
Log.e(TAG, "onProviderDisabled: " + provider);
}
public void onProviderEnabled(String provider)
{
Log.e(TAG, "onProviderEnabled: " + provider);
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
Log.e(TAG, "onStatusChanged: " + provider);
}
}
LocationListener[] mLocationListeners = new LocationListener[] {
new LocationListener(LocationManager.GPS_PROVIDER),
new LocationListener(LocationManager.NETWORK_PROVIDER)
};
@Override
public IBinder onBind(Intent arg0)
{
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
Log.e(TAG, "onStartCommand");
super.onStartCommand(intent, flags, startId);
return START_STICKY;
}
@Override
public void onCreate()
{
Log.e(TAG, "onCreate");
initializeLocationManager();
try {
mLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[1]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "network provider does not exist, " + ex.getMessage());
}
try {
mLocationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE,
mLocationListeners[0]);
} catch (java.lang.SecurityException ex) {
Log.i(TAG, "fail to request location update, ignore", ex);
} catch (IllegalArgumentException ex) {
Log.d(TAG, "gps provider does not exist " + ex.getMessage());
}
}
@Override
public void onDestroy()
{
Log.e(TAG, "onDestroy");
super.onDestroy();
if (mLocationManager != null) {
for (int i = 0; i < mLocationListeners.length; i++) {
try {
mLocationManager.removeUpdates(mLocationListeners[i]);
} catch (Exception ex) {
Log.i(TAG, "fail to remove location listners, ignore", ex);
}
}
}
}
private void initializeLocationManager() {
Log.e(TAG, "initializeLocationManager");
if (mLocationManager == null) {
mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
}
}
}
当您要开始时，将此代码复制到您的活动中：
startService（new Intent（this，MyServiceGPS.class））;
创建一类全局常量：
公共类全局常量
{
公共静态双纬度（lon）；
}
当您想要当前项目中的纬度和经度时，只需编写此
globalconstant.lat ,globalconstant.lon在清单中添加使用权限