Google会在actionbarsherlock标签中进行映射

Question

我想让谷歌地图v2在我的应用程序中工作.我已经看到几个示例显示如何在活动中打开SupportMapFragment.这个想法是你的活动将调用setContentView(R.layout.map_layout);map_layout.xml链接到片段的行:

android:name="com.google.android.gms.maps.SupportMapFragment"
        xmlns:map="http://schemas.android.com/apk/res-auto"

"name ="行有效地表示"此布局由"SupportMapFragment"类型的片段控制.

我的复杂之处在于我试图让地图显示在带有标签的活动中(使用actionbarsherlock实现).这意味着对应于选项卡选择的任何片段都必须实现TabListener.但是SupportMapFragment没有.所以现在我想要创建一个像这样的新片段:

public class MyMapFragmentWithTabListener extends SupportMapFragment implements TabListener
{

但是现在我对如何编写MapFragmentWithTabListener的内容特别是onCreateView感到困惑...我应该夸大一些布局吗？当然,我不能从示例中充分膨胀相同的map_layout.xml,因为它已经声明它由SupportMapFragment控制,而在此实现中它应该由MyMapFragmentWithTabListener控制 - 我是否需要稍微不同的xml文件来充气(如果它应该是什么样子？) - 或者我应该以编程方式创建我的视图？

Answer 1

我现在已经在很多应用程序中完成了这个.您只需创建自己的MapFragment,而不是扩展SupportMapFragment.您可以拥有自己的布局,其中包含MapView视图.关键是将Fragment的生命周期事件路由到MapView,然后让你的叔叔陷入困境.

下面是一些示例代码:

MapFragment

package com.example.testapplication;

import java.util.concurrent.TimeUnit;

import com.google.android.gms.common.GooglePlayServicesNotAvailableException;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.MapsInitializer;


public class TestMapFragment extends Fragment {

    private MapView mMapView;

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


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.home_fragment, container, false);

        mMapView = (MapView) view.findViewById(R.id.mapview);

        // inflat and return the layout
        mMapView.onCreate(savedInstanceState);
        mMapView.onResume();// needed to get the map to display immediately

        try {
            MapsInitializer.initialize(getActivity());
        } catch (GooglePlayServicesNotAvailableException e) {
            e.printStackTrace();
        }
        GoogleMap googleMap = mMapView.getMap();
        googleMap.getUiSettings().setMyLocationButtonEnabled(true);
        return view;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRetainInstance(true);
    }

    /*
     * Using a mapview in a fragment requires you to 'route'
     * the lifecycle events of the fragment to the mapview
     */
    @Override
    public void onResume() {
        super.onResume();
        if (null != mMapView)
            mMapView.onResume();
    }

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

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

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

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

和布局:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <com.google.android.gms.maps.MapView
        android:id="@+id/mapview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        map:uiZoomControls="false" />
</RelativeLayout>