如何将Google Map API v2包含到片段中？

Question

Here is the case that i would like to add a Google API into an action bar which goes to a fragment. But, it failed because the fragment class has to extends FragmentActivity while the action bar not allowed it, anyone could help to fix it? Thanks very much!

MainHome.java

package com.example.demo3;    
import android.app.ActionBar;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;

public class MainHome extends Activity {    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mainhome);

        initView();
    }


    private void initView() {

        final ActionBar actionBar = getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        actionBar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);

        actionBar.addTab(actionBar
                .newTab()
                .setText("My Information")
                .setTabListener(
                        new MyTabListener<FragmentPage1>(this,
                                FragmentPage1.class)));

        actionBar.addTab(actionBar
                .newTab()
                .setText("My Location")
                .setTabListener(
                        new MyTabListener<FragmentPage2>(this,
                                FragmentPage2.class)));
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.prelog, menu);
        return true;
    }
}

Fragment2.java

package com.example.demo3;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

public class FragmentPage2 extends Fragment {

      static final LatLng HAMBURG = new LatLng(53.558, 9.927);
      static final LatLng KIEL = new LatLng(53.551, 9.993);
      private GoogleMap map;

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View v = inflater.inflate(R.layout.locationhome, null, false);

        map = ((SupportMapFragment) getFragmentManager().findFragmentById(
                R.id.map)).getMap();

        Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
                .title("Hamburg"));
        Marker kiel = map.addMarker(new MarkerOptions()
                .position(KIEL)
                .title("Kiel")
                .snippet("Kiel is cool")
                .icon(BitmapDescriptorFactory
                        .fromResource(R.drawable.ic_launcher)));

        // Move the camera instantly to hamburg with a zoom of 15.
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 15));

        // Zoom in, animating the camera.
        map.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);

        return v;

    }
}

It brings that I need to extend FragmentActivity to enable

map = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();

. However, it will make

actionBar.addTab(actionBar
                        .newTab()
                        .setText("My Location")
                        .setTabListener(
                                new MyTabListener<FragmentPage2>(this,
                                        FragmentPage2.class)));

failed. Anyone could have some suggestion?

Thanks very much!

Answer 1

use mapview instead of mapfragment like this

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

and modify java file like this

public class MyMapFragment extends Fragment {

    private MapView mMapView;
    private GoogleMap mMap;
    private Bundle mBundle;

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

        try {
            MapsInitializer.initialize(getActivity());
        } catch (GooglePlayServicesNotAvailableException e) {
            // TODO handle this situation
        }

        mMapView = (MapView) inflatedView.findViewById(R.id.map);
        mMapView.onCreate(mBundle);
        setUpMapIfNeeded(inflatedView);

        return inflatedView;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mBundle = savedInstanceState;
    }

    private void setUpMapIfNeeded(View inflatedView) {
        if (mMap == null) {
            mMap = ((MapView) inflatedView.findViewById(R.id.map)).getMap();
            if (mMap != null) {
                setUpMap();
            }
        }
    }

    private void setUpMap() {
        mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
    }

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

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

    @Override
    public void onDestroy() {
        mMapView.onDestroy();
        super.onDestroy();
    }
}