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我让我的应用程序找到位置工作,但我更改了一些代码,现在位置总是返回null。惭愧的是,我不确定我改变了哪些代码,但我似乎无法让它工作。Android位置始终为空
任何人都可以看到为什么这返回null?我一整天都在努力,没有快乐。下面 代码:
....imports....
public class Clue extends Activity {
public static double latitude;
public static double longitude;
Criteria criteria;
LocationManager lm;
LocationListener ll;
Location location;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.questions);
criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
ll = new MyLocationListener();
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);
areWeThereYet();
}
private void areWeThereYet()
{
if(weAreThere())
{
showMsgBox("There");
}
else if(location!=null)
toastMsg("not there");
}
private boolean weAreThere() {
location = getLocation();
if (location!=null)
{
longitude = location.getLongitude();
latitude = location.getLatitude();
return inCorrectPlace(question);
}
else
{
toastMsg("Location not ready yet");
return false;
}
}
private Location getLocation() {
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);
return lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}
}
public class MyLocationListener implements LocationListener
{
public void onLocationChanged(Location loc)
{
Clue.longitude = loc.getLongitude();
Clue.latitude = loc.getLatitude();
}
}
我添加了所有的权限和简化我的代码,所以你都可以看到发生了什么事情。
感谢,
本
只是对未来的建议:把你的代码放在版本控制中! – 2011-12-15 18:37:22
我通常这样做,这是一个小项目,所以我没有打扰:希望我现在做了! – 2011-12-15 18:39:35