Question

我只想在我的活动中收到我从Emulator Control发送的位置数据。以下是我在主要活动中使用的代码：

public class LocationAlert extends Activity {

TextView txtMessage;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    txtMessage = (TextView)findViewById(R.id.txtMsg);

    LocationManager lm = (LocationManager)getSystemService(LOCATION_SERVICE);

    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 0, mLocListener);


    if (lm.getLastKnownLocation(LocationManager.GPS_PROVIDER) != null){
        txtMessage.setText(String.valueOf(lm.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLatitude()));
    }

}

LocationListener mLocListener = new LocationListener() {

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderEnabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onProviderDisabled(String provider) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onLocationChanged(Location location) {

        if (location != null){
            txtMessage.setText("Latitude: " + String.valueOf(location.getLatitude()) + ", Longitude: " + String.valueOf(location.getLongitude()));
        }

    }
};

}

但我没有获得任何数据，并且模拟器中运行的所有进程逐个关闭，我可以在“设备”选项卡中看到。上面的代码出了什么问题？

Answer 1

您可能在清单文件中缺少某些Android权限。将此添加到您的清单

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

在Android中模拟位置数据

1 个答案: