Question

我在super.onResume中使用Google地图发生了一些随机崩溃。它只发生在调试模式下，而不是生产中。奇怪的是如何将地图添加到片段中（不是由我自己编码），但之前它正常工作。有一天开始崩溃。您可以在下面看到错误和代码。我真的很感激一些帮助！

Fatal Exception: java.lang.NullPointerException
com.google.maps.api.android.lib6.e.y.b (Unknown Source)
com.google.android.gms.maps.MapFragment.onResume (Unknown Source)
com.xxxx.xxxx.Fragments.FragmentMap.onResume (FragmentMap.java:983)
com.xxxx.xxxx.Fragments.FragmentMap.onConnected(FragmentMap.java:2667)
com.google.android.gms.common.internal.zzk.zzk (Unknown Source)
dalvik.system.NativeStart.main (NativeStart.java)

这就是绘制地图的片段：

public class FragmentMap extends MapFragment implements LocationListener,
    GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, ResultCallback<LocationSettingsResult> {
GoogleMap map;
GoogleApiClient 
{...}


@Override
public void onCreate(Bundle savedInstanceState) {
//Instantiate here all not view objects (Fragments good practices)
    super.onCreate(savedInstanceState);
    setRetainInstance(true);
    if (checkPlayServices()) {

        // Building the GoogleApi client
        buildGoogleApiClient();
        createLocationRequest();
        buildLocationSettingsRequest();
        checkLocationSettings();

    }
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    map = this.getMap();
    map.getUiSettings().setZoomControlsEnabled(false);
    map.getUiSettings().setMyLocationButtonEnabled(false);

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View mapView = super.onCreateView(inflater, container, savedInstanceState);
    RelativeLayout rl = new RelativeLayout(getActivity());

    if (condition1) {
        View firstOverlay = inflater.inflate(R.layout.first_map_layout, null);
        rl.addView(mapView);
        rl.addView(firstOverlay);
        setHasOptionsMenu(true);

    } else {
        View srcvAddress = inflater.inflate(R.layout.address_finder, null);
        rl.addView(mapView);
        rl.addView(srcvAddress);
    }

    return rl;
}

@Override
public void onResume() {
    super.onResume(); <----------------------- **HERE CRASHES!!**
    stopUpdatePositionService();
    if (mGoogleApiClient.isConnected()) {
       {...}
    }
}

/**
 * Creating google api client object
 */
private synchronized void buildGoogleApiClient() {
    mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API).build();
}

 /**
 * Stopping location updates
 */
private void stopLocationUpdates() {
    if (mGoogleApiClient.isConnected())
        LocationServices.FusedLocationApi.removeLocationUpdates(
                mGoogleApiClient, this);
}
    @Override
public void onStart() {
    super.onStart();
    if (mGoogleApiClient != null) {
        mGoogleApiClient.connect();
    }
}

/**
 * Google api callback methods
 */
@Override
public void onConnectionFailed(@NonNull ConnectionResult result) {
    Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = "
            + result.getErrorCode());
}

@Override
public void onConnected(Bundle arg0) {

    // Once connected with google api, get the location
    onResume();
    //displayLocation();
}

@Override
public void onConnectionSuspended(int arg0) {
    mGoogleApiClient.connect();
}

/**
 * Creating location request object
 */
private void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(UPDATE_INTERVAL);
    mLocationRequest.setFastestInterval(FATEST_INTERVAL);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    mLocationRequest.setSmallestDisplacement(DISPLACEMENT);
}

提前致谢！

Answer 1

地图= this.getmap（）; ---＆GT;可能是问题所在而是尝试这个

map= ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();//where R.id.map is google map fragment

Answer 2

注意将来：忘掉getMap。它已被弃用。当我将所有内容移动到新的getMapAsync时，它正常运行

Android - onResume上的Google Maps NullPointer

2 个答案: