Question

当您点击抽屉上的项目时，我有导航抽屉，它应该在活动中更改谷歌地图上的地图类型。但是当我点击抽屉上的项目，地图类型没有改变活动，在我点击抽屉之前..地图加载好并显示标记..但是当我点击它显示空白地图和标记

这是我的MainActivity

public class DirectionRoute extends ActionBarActivity implements AdapterView.OnItemClickListener, GoogleMap.OnMarkerClickListener {
    private DrawerLayout drawerLayout;
    private ListView listViewLeft, listViewRight;
    private ActionBarDrawerToggle drawerListener;

    GoogleMap googleMap;

    MyNDAdapterLeft myNDAdapterLeft;
    MyNDAdapterRight myNDAdapterRight;

    MediaPlayer mpMarkerClick;

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.direction_route);

    mpMarkerClick = MediaPlayer.create(this, R.raw.button31);

    listViewLeft = (ListView) findViewById(R.id.drawerListLeft);
    myNDAdapterLeft = new MyNDAdapterLeft(this);
    listViewLeft.setAdapter(myNDAdapterLeft);
    listViewLeft.setOnItemClickListener(this);

    drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
    drawerListener = new ActionBarDrawerToggle(this, drawerLayout, R.string.drawer_open, R.string.drawer_close) {
        @Override
        public void onDrawerOpened(View drawerView) {
            super.onDrawerOpened(drawerView);
        }

        @Override
        public void onDrawerClosed(View drawerView) {
            super.onDrawerClosed(drawerView);
        }
    };

    listViewRight = (ListView) findViewById(R.id.drawerListRight);
    myNDAdapterRight = new MyNDAdapterRight(this);

    //Getting Map From Google
    SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap);
    googleMap = supportMapFragment.getMap();

    googleMap.setMyLocationEnabled(true);
    googleMap.getUiSettings().setCompassEnabled(true);
    googleMap.getUiSettings().setZoomControlsEnabled(true);
    googleMap.setTrafficEnabled(true);
    listViewRight.setAdapter(myNDAdapterRight);
    listViewRight.setOnItemClickListener(this);


    drawerLayout.setDrawerListener(drawerListener);
    getSupportActionBar().setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    selectItemLeft(position);

    SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.googleMap);


    switch (position) {
        case 0:
            googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
            mpMarkerClick.start();
        case 1:
            googleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
            mpMarkerClick.start();
        case 2:
            googleMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
            mpMarkerClick.start();
        case 3:
            googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
            mpMarkerClick.start();
        case 4:
            googleMap.setMapType(GoogleMap.MAP_TYPE_NONE);
            mpMarkerClick.start();
    }
    drawerLayout.closeDrawer(listViewLeft);
}

我很喜欢尝试像这样的onItemClick方法

 switch (position) {
        case 0:
            googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
            *googleMap = supportMapFragment.getMap();*
            mpMarkerClick.start();

但没有任何反应，地图仍然空白..

我已经看到如何在this中更改Android Google地图中的地图类型，对我的问题毫无帮助，

如何使用导航抽屉更改地图类型？

导航抽屉“onItemClick”无法加载支持地图片段

0 个答案: