0
我無法爲指南針應用設置目標位置。基本上它指向一個設定的目的地(而不是北)。然而,無論何時我嘗試執行destinationObj.setLatittude()或setLongitutde(),應用程序部隊都會關閉。Android目標位置
奇怪的是,如果我把位置監聽器中的destinationObj set.Lat/Long覆蓋了GPS位置,就好像該應用只能識別一個位置而不是兩個。
請指點。
感謝,
這裏是我的代碼:
import android.app.Activity;
...
public class CompassActivity extends Activity {
LocationManager locationManager;
Location LocationObj, destinationObj;
private SensorEventListener mListener = new SensorEventListener() {
public void onSensorChanged(SensorEvent event) {
if (LocationObj == null) return;
...bearing calculation...
float bearing = LocationObj.bearingTo(destinationObj);
rotateImageView(needle, R.drawable.needle, direction);
}
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
needle = (ImageView)findViewById(R.id.needle);
log = (TextView)findViewById(R.id.log);
lat = (TextView)findViewById(R.id.lat);
**destinationObj.setLatitude(20);
destinationObj.setLongitude(30);**
LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
LocationObj = location;
log.setText(Double.toString(location.getLongitude()));
lat.setText(Double.toString(location.getLatitude()));
}
public void onStatusChanged(String provider, int status, Bundle extras) {}
public void onProviderEnabled(String provider) {}
public void onProviderDisabled(String provider) {}
};
mlocManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
}
private void rotateImageView(ImageView imageView, int drawable, float rotate) {
...image rotation...
}
@Override
protected void onResume()
{
super.onResume();
mSensorManager.registerListener(mListener, mSensor,
SensorManager.SENSOR_DELAY_GAME);
}
@Override
protected void onStop()
{
mSensorManager.unregisterListener(mListener);
super.onStop();
}
}
哇,那很簡單。謝謝!實際使用的destinationObj =新位置(「」)。 – mgalal 2012-04-15 14:55:07