我正在使用播放服务 v9.8.0(没有位置服务权限)，当我在对话框 fragment 中使用 MapView 时仍然面临泄漏。我像在我的代码示例中一样使用它，我只用它来显示位置，我没有 setMyLocationEnabled(因为我什至没有此设置的权限)。

有没有人发现我的代码有问题？我遇到了像这里这样的泄漏:MapView v2 keeping Context around .我执行以下操作:

• 创建对话
• 用 MapView 替换布局中的 View (因为我也允许使用静态 map ，所以我的默认 View 是布局中的 ImageView，这将替换为 MapView)

然后碰巧我的 fragment 泄漏MapView.mContext...

代码 - 对话框 fragment

public class DialogMediaDetails extends DialogFragment
{
    private GoogleMap mGoogleMap = null;
    private MapView mMapView = null;

    @Override
    public final Dialog onCreateDialog(Bundle savedInstanceState)
    {
        Dialog dlg = ...; // create dialog
        View view = ...; // get view from dialog
        Location location = ...; // defined location
        initGoogleMap();
        return dlg;
    }

    private void initGoogleMap(Location location)
    {
        mMapView = new MapView(getActivity());
        MapsInitializer.initialize(getActivity());
        // Updates the location and zoom of the MapView
        mMapView.onCreate(null);
        mMapView.getMapAsync(new OnMapReadyCallback()
        {
            @Override
            public void onMapReady(GoogleMap googleMap)
            {
                LatLng coordinates = new LatLng(location.getLatitude(), location.getLongitude());
                googleMap.addMarker(new MarkerOptions().position(coordinates));
                googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(coordinates, 15));
                mGoogleMap = googleMap;
                mMapView.onResume();
            }
        });
        mMapView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener()
        {
            @Override
            public void onGlobalLayout()
            {
                mMapView.getViewTreeObserver().removeOnGlobalLayoutListener(this);

                // MapView is scrollable, so we disable dragging
                CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) appBarLayout.getLayoutParams();
                AppBarLayout.Behavior behavior = (AppBarLayout.Behavior) params.getBehavior();
                behavior.setDragCallback(new AppBarLayout.Behavior.DragCallback() {
                    @Override
                    public boolean canDrag(AppBarLayout appBarLayout) {
                        return false;
                    }
                });
            }
        });

        replaceHeader(mMapView);
    }

    private void replaceHeader(View view)
    {
        ViewGroup parent = (ViewGroup) pbHeader.getParent();
        int index = parent.indexOfChild(pbHeader);
        ViewGroup.LayoutParams lp = pbHeader.getLayoutParams();
        parent.removeView(pbHeader);
        parent.addView(view, index, lp);
    }

    // ----------------------------------------
    // forward all lifecycle events to MapView
    // ----------------------------------------

    @Override
    public void onResume() {
        super.onResume();
        if (mMapView != null)
            mMapView.onResume();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (mMapView != null)
            mMapView.onSaveInstanceState(outState);
    }

    @Override
    public void onPause() {
        super.onPause();
        if (mMapView != null)
            mMapView.onPause();
    }

    @Override
    public void onLowMemory() {
        super.onLowMemory();
        if (mMapView != null)
            mMapView.onLowMemory();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (mMapView != null)
            mMapView.onDestroy();
        mMapView = null;
    }
}

最佳答案

有一些issues报告了 MapView 的泄漏。您可以尝试在 onDestroy 中调用 googleMap.setMyLocationEnabled(false); 以防止泄漏发生。未能调用 MapView.onDestroy 或 GoogleMap.setMyLocationEnabled(false) 将导致泄漏。这是一个相关的 thread这可能会有所帮助。

关于android - MapView 泄漏 Activity (没有定位服务)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40583682/