Question

我编写了用于查找某个地方的纬度和经度的代码，它在使用Eclipse的PC上运行良好，但它在我的Android手机上无效。

public class MainActivity extends Activity {

    protected LocationManager locationManager;
    protected Button retrieveLocationButton;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button);
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1,
                1000, new MyLocationListener());
        retrieveLocationButton.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                showCurrentLocation();
            }
        });
    }

    protected void showCurrentLocation() {
        Location location = locationManager
                .getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if (location != null) {
            String message = String.format(
                    "Current Location \n Longitude: %1$s \n Latitude: %2$s",
                    location.getLongitude(), location.getLatitude());
            Toast.makeText(MainActivity.this, message, Toast.LENGTH_LONG)
                    .show();
        }
    }

    private class MyLocationListener implements LocationListener {

        public void onLocationChanged(Location location) {
            String message = String.format(
                    "New Location \n Longitude: %1$s \n Latitude: %2$s",
                    location.getLongitude(), location.getLatitude());
            Toast.makeText(MainActivity.this, message, Toast.LENGTH_LONG)
                    .show();
        }

        public void onStatusChanged(String s, int i, Bundle b) {
            Toast.makeText(MainActivity.this, "Provider status changed",
                    Toast.LENGTH_LONG).show();
        }

        public void onProviderDisabled(String s) {
            Toast.makeText(MainActivity.this,
                    "Provider disabled by the user. GPS turned off",
                    Toast.LENGTH_LONG).show();
        }

        public void onProviderEnabled(String s) {
            Toast.makeText(MainActivity.this,
                    "Provider enabled by the user. GPS turned on",
                    Toast.LENGTH_LONG).show();
        }
    }

}

Answer 1

确保您已在AndroidManifest文件中提供了所有必需的权限以访问gps ...

android.permission.ACCESS_COARSE_LOCATION
android.permission.ACCESS_FINE_LOCATION
android.permission.READ_PHONE_STATE
android.permission.INTERNET

请参阅此链接：https://sites.google.com/site/androidhowto/how-to-1/using-the-gps

无法找到纬度和经度

1 个答案: