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我的 android 平板电脑应用程序中有两个窗格（左侧列表和右侧详细信息）（就像设置本机平板电脑应用程序视图一样）。我已将 MapActivity 扩展到我的 MainActivity。我在左侧有一个位置详细信息列表。我想在我的右窗格中显示每个列表项的 MapView，这是一个片段。

问题是当我尝试打开 Map View 时，第一个项目是打开 mapView。从第二项开始，它显示您只能为一个 MapActivity 打开一个 MapView。请提出正确答案。我已经尝试了所有相关的帖子，但没有成功。

我的代码版本：android 4.0

请检查以下代码：

    MainActivity extends MapActivity {
    onCreate(){
                    LocationFragment loc_fragment=new LocationFragment();
                    FragmentTransaction xaction=VenueFragment.venueFrgMgr.beginTransaction();
                    Bundle sendData=new Bundle();
                    sendData.putString("LAT", s.getLat());
                    sendData.putString("LON", s.getLong());
                    sendData.putString("NAME", s.getName());
                    sendData.putString("ADD", s.getAddress());
                    loc_fragment.setArguments(sendData);
                    xaction.add(R.id.second_pane, loc_fragment,"location");
                    xaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE);

                    xaction.addToBackStack(null);
                    xaction.commit();

   }
 @Override
protected boolean isRouteDisplayed() {

    return false;
}

}

显示 MapView 的 LocationFragment 代码如下：

    private ViewGroup mapContainer;
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            super.onCreateView(inflater, container, savedInstanceState);
            //view.refreshDrawableState();

            view = inflater.inflate(R.layout.location, container, false);
            mapContainer=new LinearLayout(getActivity());
            mapContainer.addView(view);
            v = view.findViewById(R.id.loading);
            v.setVisibility(View.VISIBLE);

    /*      lonstr=LocationActivity.lonstr;
            latstr=LocationActivity.latstr;
            name=LocationActivity.name;
            address=LocationActivity.address;
    */      
            ((Button) view.findViewById(R.id.back))
                    .setOnClickListener(new OnClickListener() {

                        @Override
                        public void onClick(View v) {
                            //getActivity().finish();
                            if(mapView != null) {
                                mapView.removeAllViewsInLayout();

                                if(mapContainer!=null)
                                    mapContainer.removeView(mapView);

                                RelativeLayout parentView = (RelativeLayout) mapView.getParent();
                                //mapView.removeAllViews();
                                ((MapView)view.findViewById(R.id.mapview)).removeAllViews();
                                parentView.removeAllViews();
                                if(parentView!=null)
                                    parentView.recomputeViewAttributes(mapView);
                                getFragmentManager().findFragmentByTag("location").getView().destroyDrawingCache();
                            }

                            getFragmentManager().popBackStack();
                        //  getFragmentManager().popBackStackImmediate();
                        }
                    });
            mapView = (MapView) view.findViewById(R.id.mapview);

            mapView.setBuiltInZoomControls(true);
            mc = mapView.getController();


            Bundle b = this.getArguments();
            if (b != null) {
                latstr = b.getString("LAT");
                lonstr = b.getString("LON");
                name = b.getString("NAME");
                address = b.getString("ADD");
            }

            String coordinates[] = { latstr, lonstr };
            try {
                lat = Double.parseDouble(coordinates[0]);
                lng = Double.parseDouble(coordinates[1]);
            } catch (Exception e) {
                // TODO: handle exception
            }
            p = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
            mc.animateTo(p);
            Drawable icon = getResources().getDrawable(R.drawable.red_pin);
            icon.setBounds(0, 0, icon.getIntrinsicWidth(),
                    icon.getIntrinsicHeight());
            MyItemizedOverlay overlay = new MyItemizedOverlay(icon);
            OverlayItem item = new OverlayItem(p, "", null);
            overlay.addItem(item);
            overlay.populateNow();
            mapView.getOverlays().add(overlay);
            mapView.postInvalidate();
            mc.setZoom(12);
            if (name != null)
                ((TextView) view.findViewById(R.id.event_name)).setText(name);
            if (address != null)
                ((TextView) view.findViewById(R.id.event_date)).setText(address);
            getWheather();

            return mapContainer;
        }

我得到的错误如下：

10-15 10:43:03.881: E/AndroidRuntime(3778): android.view.InflateException: Binary XML file line #184: Error inflating class <unknown>
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.view.LayoutInflater.createView(LayoutInflater.java:606)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at webspiders.event2mobile.asme.LocationFragment.onCreateView(LocationFragment.java:128)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:828)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1032)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.app.BackStackRecord.run(BackStackRecord.java:622)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1382)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.app.FragmentManagerImpl$1.run(FragmentManager.java:426)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.os.Handler.handleCallback(Handler.java:605)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.os.Handler.dispatchMessage(Handler.java:92)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.os.Looper.loop(Looper.java:137)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.app.ActivityThread.main(ActivityThread.java:4507)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at java.lang.reflect.Method.invokeNative(Native Method)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at java.lang.reflect.Method.invoke(Method.java:511)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:978)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at dalvik.system.NativeStart.main(Native Method)
10-15 10:43:03.881: E/AndroidRuntime(3778): Caused by: java.lang.reflect.InvocationTargetException
10-15 10:43:03.881: E/AndroidRuntime(3778):     at java.lang.reflect.Constructor.constructNative(Native Method)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at android.view.LayoutInflater.createView(LayoutInflater.java:586)
10-15 10:43:03.881: E/AndroidRuntime(3778):     ... 19 more
10-15 10:43:03.881: E/AndroidRuntime(3778): Caused by: java.lang.IllegalStateException: You are only allowed to have a single MapView in a MapActivity
10-15 10:43:03.881: E/AndroidRuntime(3778):     at com.google.android.maps.MapActivity.setupMapView(MapActivity.java:397)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at com.google.android.maps.MapView.<init>(MapView.java:289)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at com.google.android.maps.MapView.<init>(MapView.java:264)
10-15 10:43:03.881: E/AndroidRuntime(3778):     at com.google.android.maps.MapView.<init>(MapView.java:247)
4

2 回答 2

0

我猜您的 MainActivity 中有一个列表视图和一个包含您的地图视图的容器。

当在 listivew 中选择项目时，您想在地图上做一些事情。

如果是这样，那么您只需要一个包含您的地图的片段，然后每次从您的列表中选择一个新项目时，您需要通知您的片段有新数据可用，并且它应该自行刷新。

如果您知道如何创建一个，您可以通过自定义界面来完成。

于 2012-10-15T11:02:24.930 回答
0 
I resolved the problem like this, by creating map object in Activity class and using it in Fragments. Here the code goes  

In ACTIVITY 

    HomeActivity extends MapActivity {
            View mMapViewContainer;
            MapView mMapView;

        onCreate(){
    ------------
    -------------
          mMapViewContainer = (ViewGroup)LayoutInflater.from(this).inflate(R.layout.location, null);
          mMapView = (MapView) mMapViewContainer.findViewById(R.id.mapview);

    -------------
    ---------------
       }
     @Override
    protected boolean isRouteDisplayed() {

        return false;
    }


    In Fragment:


            HomeActivity parentActivity = (HomeActivity) getActivity();
            if (parentActivity != null) {
                parentActivity.mMapViewContainer.refreshDrawableState();
                mMapViewContainer = parentActivity.mMapViewContainer;
                mMapView = parentActivity.mMapView;

                mMapView.getOverlays().clear();
                mMapView.invalidate();

            }
于 2012-10-18T13:51:05.670 回答