我正在创建一个具有操作栏和 2 个选项卡的应用程序。像这样:

Tab1:点击应该显示一个地方的一些细节。 Tab2:点击应显示 map 。

我为此使用了 Fragments。

我的标签监听器:

private class MyTabListener implements ActionBar.TabListener {
        @Override
        public void onTabSelected(Tab tab,
                android.support.v4.app.FragmentTransaction ft) {
            // TODO Auto-generated method stub
            if (tab.getPosition() == 0) {
                DetailsFragment fragment = new DetailsFragment();
                ft.replace(android.R.id.content, fragment);

            } else {
                MapsFragment fragment = new MapsFragment();
                ft.replace(android.R.id.content, fragment);
                //ft.commit();
            }
        }

MapsFragment.java

public class MapsFragment extends MapFragment {

    private MapView map = null;
    private MyLocationOverlay me = null;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return (new FrameLayout(getActivity()));
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        map = new MapView(getActivity(),
                "0rQAS47Cicu2t7z4w8Ev6A6de7QlbjvKyi8I-QQ");
        map.setClickable(true);

        map.getController().setCenter(
                getPoint(40.76793169992044, -73.98180484771729));
        map.getController().setZoom(17);
        map.setBuiltInZoomControls(true);

        Drawable marker = getResources().getDrawable(R.drawable.marker);

        marker.setBounds(0, 0, marker.getIntrinsicWidth(),
                marker.getIntrinsicHeight());

        map.getOverlays().add(new SitesOverlay(marker));

        me = new MyLocationOverlay(getActivity(), map);
        map.getOverlays().add(me);

        ((ViewGroup) getView()).addView(map);
    }

    @Override
    public void onResume() {
        super.onResume();

        me.enableCompass();
    }

    @Override
    public void onPause() {
        super.onPause();

        me.disableCompass();
    }

    private GeoPoint getPoint(double lat, double lon) {
        return (new GeoPoint((int) (lat * 1000000.0), (int) (lon * 1000000.0)));
    }

    private class SitesOverlay extends ItemizedOverlay<OverlayItem> {
        private List<OverlayItem> items = new ArrayList<OverlayItem>();

        public SitesOverlay(Drawable marker) {
            super(marker);

            boundCenterBottom(marker);

            items.add(new OverlayItem(getPoint(40.748963847316034,
                    -73.96807193756104), "UN", "United Nations"));
            items.add(new OverlayItem(getPoint(40.76866299974387,
                    -73.98268461227417), "Lincoln Center",
                    "Home of Jazz at Lincoln Center"));
            items.add(new OverlayItem(getPoint(40.765136435316755,
                    -73.97989511489868), "Carnegie Hall",
                    "Where you go with practice, practice, practice"));
            items.add(new OverlayItem(getPoint(40.70686417491799,
                    -74.01572942733765), "The Downtown Club",
                    "Original home of the Heisman Trophy"));

            populate();
        }

        @Override
        protected OverlayItem createItem(int i) {
            return (items.get(i));
        }

        @Override
        protected boolean onTap(int i) {
            Toast.makeText(getActivity(), items.get(i).getSnippet(),
                    Toast.LENGTH_SHORT).show();

            return (true);
        }

        @Override
        public int size() {
            return (items.size());
        }
    }
}

问题是当我第一次点击 map 选项卡时， map 出现了。但是当我转到详细信息选项卡并再次返回 map 选项卡时，我的应用程序崩溃并出现错误:

日志:

12-04 03:28:02.228: E/AndroidRuntime(14466): FATAL EXCEPTION: main
12-04 03:28:02.228: E/AndroidRuntime(14466): java.lang.IllegalStateException: You are only allowed to have a single MapView in a MapActivity
12-04 03:28:02.228: E/AndroidRuntime(14466):    at com.google.android.maps.MapActivity.setupMapView(MapActivity.java:398)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at com.google.android.maps.MapView.<init>(MapView.java:289)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at com.google.android.maps.MapView.<init>(MapView.java:235)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at com.m7.nomad.MapsFragment.onCreate(MapsFragment.java:34)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.support.v4.app.BackStackRecord.run(Unknown Source)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.support.v4.app.FragmentManagerImpl.execPendingActions(Unknown Source)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.support.v4.app.FragmentManagerImpl$1.run(Unknown Source)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.os.Handler.handleCallback(Handler.java:725)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.os.Looper.loop(Looper.java:137)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at android.app.ActivityThread.main(ActivityThread.java:5039)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at java.lang.reflect.Method.invokeNative(Native Method)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at java.lang.reflect.Method.invoke(Method.java:511)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-04 03:28:02.228: E/AndroidRuntime(14466):    at dalvik.system.NativeStart.main(Native Method)

什么问题。我知道 MapView 不能从 fragment 中膨胀。但我使用了这种技术: http://xrigau.wordpress.com/2012/03/22/howto-actionbarsherlock-mapfragment-listfragment/

但这仍然行不通。我需要一些帮助。

最佳答案

就在几天前，Google 推出了 Map Api 2。它包含 MapFragment。所以现在你不需要这样的钩子(Hook)了。 https://developers.google.com/maps/documentation/android/reference/com/google/android/gms/maps/MapFragment

关于Android map 查看错误: You are only allowed to have a single MapView in a MapActivity，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13702262/