在弹出窗口中显示地图 v2 在 Android 中不显示？

我想打开弹出窗口，我使用地图 v2 在弹出窗口中显示地图 v2，但不显示 在这里我放置了我的 xml 布局和活动类

main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="100dp"
        android:text="Button" />

</RelativeLayout>

popupstelldetailpage.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/popuplayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    android:orientation="vertical" >

        <Button
            android:id="@+id/buttoncancel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Cancel"
            android:layout_gravity="right"
             />

          <fragment
                    android:id="@+id/popupmapview"
                    android:layout_width="fill_parent"
                    android:layout_height="fill_parent"
                    android:layout_margin="10dp"
                    class="com.google.android.gms.maps.SupportMapFragment" />



</LinearLayout>

地图活动.java

public class MainActivity extends  FragmentActivity {


     PopupWindow pw;
     GoogleMap map;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button button= (Button)findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                initiatePopupWindow();
            }
        });

    }


    private void initiatePopupWindow() 
    {
        try 
        {

            //We need to get the instance of the LayoutInflater, use the context of this activity
            LayoutInflater inflater = (LayoutInflater) MainActivity.this
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            //Inflate the view from a predefined XML layout
            View layout = inflater.inflate(R.layout.popupstellodetailpage,
                    (ViewGroup) findViewById(R.id.popuplayout));

            // create a 300px width and 470px height PopupWindow
            pw = new PopupWindow(layout, 300, 470, true);

            // display the popup in the center
            pw.showAtLocation(layout, Gravity.CENTER, 0, 0);


            map= ((SupportMapFragment) getSupportFragmentManager()
                     .findFragmentById(R.id.popupmapview)).getMap(); 


            Button buttoncancel=(Button)layout.findViewById(R.id.buttoncancel);
            buttoncancel.setOnClickListener(new OnClickListener() 
            {   
                @Override
                public void onClick(View v) 
                {
                     pw.dismiss();
                }

            });

        }
        catch (Exception e) 
        {
            e.printStackTrace();
        }


    }
}

这可能对你有帮助检查这里检查此处所有您需要显示地图的可能性是否已完全填写AndroidManifest.xml

<permission
        android:name="your.Activity.permission.MAPS_RECEIVE"
        android:protectionLevel="signature" />

    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />
    <uses-permission android:name="your.Activity.permission.MAPS_RECEIVE" />

<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_CORSE_LOCATION" />

<meta-data    
   android:name="com.google.android.maps.v2.API_KEY"    
   android:value="your_api_key"/>