未连接.调用Connect或等待onConnected()在onConnected内调用异常？

Question

我有这个onConnected回调实现Google LocationClient API:

@Override
public void onConnected(Bundle arg0) {
    if (lc != null) {
        lastKnownLocation = lc.getLastLocation();
        LocationRequest request = new LocationRequest();
        request.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        request.setFastestInterval(MIN_TIME_BETWEEN_LOCATION_UPDATES);
        request.setSmallestDisplacement(MIN_DISTANCE_BETWEEN_LOCATION_UPDATES);
        lc.requestLocationUpdates(request, ll);
    }
}

出于某种原因,有时候这一行:

lastKnownLocation = lc.getLastLocation();

给我这个例外:

java.lang.IllegalStateException: Not connected. Call connect() and wait for onConnected() to be called.
   at com.google.android.gms.internal.de.bc()
   at com.google.android.gms.internal.ez.a()
   at com.google.android.gms.internal.ez$c.bc()
   at com.google.android.gms.internal.ey.getLastLocation()
   at com.google.android.gms.internal.ez.getLastLocation()
   at com.google.android.gms.location.LocationClient.getLastLocation()
   at com.citylifeapps.cups.helputils.UserLocation.onConnected(UserLocation.java:115)
   at com.google.android.gms.internal.de.aZ()
   at com.google.android.gms.internal.de$f.a()
   at com.google.android.gms.internal.de$f.a()
   at com.google.android.gms.internal.de$b.be()
   at com.google.android.gms.internal.de$a.handleMessage()
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at android.os.Looper.loop(Looper.java:157)
   at android.app.ActivityThread.main(ActivityThread.java:5356)
   at java.lang.reflect.Method.invokeNative(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:515)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
   at dalvik.system.NativeStart.main(NativeStart.java)

我真的不明白为什么会这样.显然,我正在尝试使用LocationClientafter运行connect方法并等待onConnected回调来获取最后一个已知位置,因为我知道onConnected当我连接时调用回调,那么我怎样才能得到"Not connected ..."异常？有人知道吗？

谢谢.

Answer 1

我在三星 S4 和 S3 mini 上也遇到同样的问题。

只需用 try/catch getLastLocation() 包装并开始从 requirestLocationUpdate 获取实际位置：

@Override
public void onConnected(Bundle arg0) {
    if (lc != null) {
        try{   
           lastKnownLocation = lc.getLastLocation();
        catch(Exception ex){ /* log error */ }

        LocationRequest request = new LocationRequest();
        request.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        request.setFastestInterval(MIN_TIME_BETWEEN_LOCATION_UPDATES);
        request.setSmallestDisplacement(MIN_DISTANCE_BETWEEN_LOCATION_UPDATES);
        lc.requestLocationUpdates(request, ll);
    }
}