我有以下代码使用 GPS 获取用户位置。(代码工作正常)
但我的问题是当我关闭程序时(按返回按钮)它会生成错误消息
应用程序......已停止工作...... .....请再试一次。 .
我认为我必须删除侦听器,因为我在onDestroy()中使用了 removeUpdates()方法,然后也会生成相同的错误消息。
我该如何解决它。
我的代码:
public class Location_AddressActivity extends Activity {
/** Called when the activity is first created. */
TextView txt_logitude;
TextView txt_latitude;
TextView txt_address;
LocationListener mlocListener;
LocationManager mlocManager;
Geocoder geocoder;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txt_logitude=(TextView)findViewById(R.id.txt_logitude);
txt_latitude=(TextView)findViewById(R.id.txt_latitude);
txt_address=(TextView)findViewById(R.id.txt_address);
geocoder = new Geocoder(this, Locale.ENGLISH);
txt_latitude.setText("");
txt_logitude.setText("");
txt_address.setText("");
mlocManager= (LocationManager)getSystemService(Context.LOCATION_SERVICE);
mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
}
public void onDestroy()
{
mlocManager.removeUpdates(mlocListener);
}
class MyLocationListener implements LocationListener
{
public void onLocationChanged(Location location) {
double latitude=location.getLatitude();
double longitude=location.getLongitude();
txt_latitude.setText(new Double(latitude).toString());
txt_logitude.setText(new Double(longitude).toString());
try {
List<Address> addresses = geocoder.getFromLocation(latitude, longitude, 1);
if(addresses != null) {
Address returnedAddress = addresses.get(0);
StringBuilder strReturnedAddress = new StringBuilder("Address:\n");
for(int i=0; i<returnedAddress.getMaxAddressLineIndex(); i++) {
strReturnedAddress.append(returnedAddress.getAddressLine(i)).append("\n");
}
txt_address.setText(strReturnedAddress.toString());
}
else{
txt_address.setText("No Address returned!");
}
}
catch (IOException e) {
e.printStackTrace();
txt_address.setText(e.getMessage());
}
}
public void onProviderDisabled(String provider) {
txt_address.setText("GPS Disable");
}
public void onProviderEnabled(String provider) {
txt_address.setText("GPS Enable");
}
}
}
谢谢..