Question

我正在使用Google Maps API构建一个简单的地图应用程序。当我打开应用程序时，它有时会崩溃，因为GoogleApiClient尚未连接。我有一些运行的方法，需要连接API。

如何通过等待API连接来防止崩溃？

以下是我的一些代码： onConnected：

@Override
public void onConnected(Bundle connectionHint)
{
    // this callback will be invoked when all specified services are connected
    //Must ask for explicit permission
    //ie: Opening settings action in order to change or give permissions
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED || ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
        currentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleClient);
        mGoogleClient.connect();

        if (currentLocation != null)
        { 
            currentLatLng = new LatLng(currentLocation.getLatitude(), currentLocation.getLongitude());
            mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 15));
        } 

        else
        {
           if (mGoogleClient!=null )
           {
               mGoogleClient.connect();
           }

            LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleClient, locationRequest, this);

        }
    }
}

获取当前位置：

private void getLocation() {

    locationRequest = LocationRequest.create();
    locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    locationRequest.setInterval(60 * 1000);
    locationRequest.setFastestInterval(30 * 1000);

    mGoogleClient = new GoogleApiClient.Builder(this)
            .addApi(LocationServices.API)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .build();

    if (mGoogleClient != null)
    {
        mGoogleClient.connect();
    }


}

我不确定还需要什么。如果我需要提供更多代码，请告诉我。

编辑：崩溃日志

08-15 17:51:54.692 950-950/? E/AndroidRuntime: FATAL EXCEPTION: main
                                           Process: com.hensh.fusedmap, PID: 950
                                           java.lang.IllegalStateException: GoogleApiClient is not connected yet.
                                               at com.google.android.gms.common.api.internal.zzh.zzb(Unknown Source)
                                               at com.google.android.gms.common.api.internal.zzl.zzb(Unknown Source)
                                               at com.google.android.gms.common.api.internal.zzj.zzb(Unknown Source)
                                               at com.google.android.gms.location.internal.zzd.requestLocationUpdates(Unknown Source)
                                               at com.hensh.fusedmap.MapsActivity.onConnected(MapsActivity.java:667)
                                               at com.google.android.gms.common.internal.zzk.zzk(Unknown Source)
                                               at com.google.android.gms.common.api.internal.zzj.zzi(Unknown Source)
                                               at com.google.android.gms.common.api.internal.zzh.zzpx(Unknown Source)
                                               at com.google.android.gms.common.api.internal.zzh.onConnected(Unknown Source)
                                               at com.google.android.gms.common.api.internal.zzl.onConnected(Unknown Source)
                                               at com.google.android.gms.common.api.internal.zzc.onConnected(Unknown Source)
                                               at com.google.android.gms.common.internal.zzj$zzg.zzqL(Unknown Source)
                                               at com.google.android.gms.common.internal.zzj$zza.zzc(Unknown Source)
                                               at com.google.android.gms.common.internal.zzj$zza.zzw(Unknown Source)
                                               at com.google.android.gms.common.internal.zzj$zzc.zzqN(Unknown Source)
                                               at com.google.android.gms.common.internal.zzj$zzb.handleMessage(Unknown Source)
                                               at android.os.Handler.dispatchMessage(Handler.java:102)
                                               at android.os.Looper.loop(Looper.java:135)
                                               at android.app.ActivityThread.main(ActivityThread.java:5294)
                                               at java.lang.reflect.Method.invoke(Native Method)
                                               at java.lang.reflect.Method.invoke(Method.java:372)
                                               at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
                                               at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)

Answer 1

您应该将代码段mMap.animateCamera...等放入onMapLoaded。

Detect when Android v2 maps has loaded

并删除onConnected方法中的mGoogleClient.connect();，因为您不必连接两次（或更多次）

在尝试连接之前等待GoogleAPIClient加载

1 个答案: