0
我遵循Android的HelloMapView教程,並添加了一些代碼來捕獲我當前的位置信息並顯示在文本視圖中。Android MapActivity無法檢索位置數據
我已經測試了這些代碼在另一個程序中,它的工作,它能夠顯示我的經度和緯度數據,當啓動應用程序。但是,當我將代碼複製到此MapActivity中時,似乎我無法獲取位置數據。
下面是部分代碼:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
mapOverlays = mapView.getOverlays();
drawable = this.getResources().getDrawable(R.drawable.androidmarker);
itemizedOverlay = new HelloItemizedOverlay(drawable, this);
Button button1 = (Button)this.findViewById(R.id.button1);
tv1 = (TextView) this.findViewById(R.id.textView1);
button1.setOnClickListener(mScan);
latitude = 1.3831625;
longitude = 103.7727321;
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location == null)
location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
if (System.currentTimeMillis() - location.getTime() < 3000)
{
longitude = location.getLongitude();
latitude = location.getLatitude();
tv1.setText(Double.toString(longitude));
}
}
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 2000, 10, locationListener);
}
private final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
longitude = location.getLongitude();
latitude = location.getLatitude();
tv1.setText(Double.toString(latitude));
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
};
另請注意,即使我已經自定義了經度和緯度,但我的tv1並未更新爲任何值。 – phatez