Android 地图 v2 地图在方向更改时变得无响应

Question

我正在使用新的地图 API。它工作正常.. 但是当设备方向改变时......地图变得无响应。我的意思是地图不会对用户响应做出反应。

当我在布局 xml 中嵌入地图片段时，不会出现此问题。但仅当我尝试在 Activity 的 onCreate 中的布局容器中添加 mapfragment 时才会发生。

谁能告诉我这个问题。

这是我添加地图的方式

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HomeActivity" >


<FrameLayout
    android:id="@+id/activity_home_fragment_container"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true">
</FrameLayout>

</RelativeLayout>

并且在Activity的oncreate中

mMapFragment = new SupportMapFragment();
    FragmentManager manager = getSupportFragmentManager();
    FragmentTransaction transaction = manager.beginTransaction();
    transaction.add(R.id.activity_home_fragment_container, mMapFragment,
            "MAP_FRAGMENT");
    transaction.commit();

Answer 1

在你的布局中使用它：

<LinearLayout
        android:id="@+id/map_container2"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_weight="35.22"
        android:orientation="horizontal" >

        <fragment
            android:id="@+id/map1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            class="com.google.android.gms.maps.SupportMapFragment"
            map:cameraTargetLat="40.72"
            map:cameraTargetLng="-74.00"
            map:cameraZoom="8" />
    </LinearLayout>

还有这段代码：

onCreate{
   setUpMapIfNeeded();
}

private void setUpMapIfNeeded() {
        // TODO Auto-generated method stub
        // Do a null check to confirm that we have not already instantiated the map.
        if (mMap == null) {
            // Try to obtain the map from the SupportMapFragment.
            mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map1))
                    .getMap();
            // Check if we were successful in obtaining the map.
            if (mMap != null) {
                setUpMap();
            }
        }
    }

private void setUpMap() {
        // TODO Auto-generated method stub
         // Hide the zoom controls as the button panel will cover it.
        mUiSettings = mMap.getUiSettings();
 // Enables/disables zoom gestures (i.e., double tap, pinch & stretch).
        mMap.getUiSettings().setZoomGesturesEnabled(false);
// Enables/disables scroll gestures (i.e. panning the map).
        mMap.getUiSettings().setScrollGesturesEnabled(false);
 // Enables/disables the compass (icon in the top left that indicates the orientation of the
        // map).
        mMap.getUiSettings().setCompassEnabled(false);
        // Add lots of markers to the map.
        addMarkersToMap();

        // Pan to see all markers in view.
        // Cannot zoom to bounds until the map has a size.
        final View mapView = getSupportFragmentManager().findFragmentById(R.id.map1).getView();
        if (mapView.getViewTreeObserver().isAlive()) {
            mapView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
                @SuppressLint("NewApi") // We check which build version we are using.
                @Override
                public void onGlobalLayout() {
                    LatLngBounds bounds = new LatLngBounds.Builder()
                            .include(WOODS)
                            .build();
                    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
                      mapView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                    } else {
                      mapView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                    }
                    mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds, 50));
                }
            });
        }
    }

private void addMarkersToMap() {
        // TODO Auto-generated method stub
         // Uses a colored icon.
        mWoods = mMap.addMarker(new MarkerOptions()
                .position(WOODS)
                .title("Woods")
                .snippet("R. Quatá, 1016, Vila Olimpia - (11) 3849-6868")
                .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));
    }

Answer 2

我的猜测是，如果您在 Activity's onCreate() 中添加 Fragment 而不检查 savedInstanceState == null 是否最终会添加两个（或更多）SupportMapFragments，这会导致此效果.