如何获得经度？

Question

我是android studio的新手，正在从事小型项目，但是当我尝试获取位置（经度和纬度）时，应用程序已成功构建，但随后遇到了问题。

问题是在智能手机上启动应用程序时，该应用程序始终停止运行

这是我的代码：

    int LOCATION_PERMISSION_CODE = 1;
    ActivityCompat.shouldShowRequestPermissionRationale(this , Manifest.permission.ACCESS_FINE_LOCATION );
    ActivityCompat.requestPermissions(MainActivity.this , new String[]{Manifest.permission.ACCESS_FINE_LOCATION},LOCATION_PERMISSION_CODE);
    if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
    }
    final long meter = 1;
    final long mill = 1;

    LocationManager locationManger = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
    assert locationManger != null;
    locationManger.requestLocationUpdates(LocationManager.GPS_PROVIDER,meter,mill, new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onProviderDisabled(String provider) {

        }
    });
    Location lastLocationGPS = locationManger.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    if (lastLocationGPS == null) {
        lastLocationGPS = locationManger.getLastKnownLocation(LocationManager.PASSIVE_PROVIDER);
        TextView textView2 = (TextView)findViewById(R.id.textView2);
        TextView textView4 = (TextView)findViewById(R.id.textView4);            
        textView2.setText(Double.toString(lastLocationGPS.getLongitude()));                
        textView4.setText(Double.toString(lastLocationGPS.getLatitude()));

    }

编辑：The error message

Answer 1

我尝试了您的代码，您面临的最可能的问题是，您正在检查清单上没有的两种权限。

请确保您应用的清单文件中包含以下两行：

    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

如果不是引起您问题的原因，请通过编辑问题以在“ logcat”窗口中添加您遇到的错误来提供有关问题的更多信息。