Android 为什么TabView和MapView没有'；我们不能一起工作吗？

我有一个简单的选项卡视图，有两个选项卡。在第一个选项卡中，我显示一些列表视图，在第二个选项卡中，我想显示地图。但当我尝试使用时，我的应用程序坏了

这是我的选项卡代码：

public class MainActivity extends TabActivity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Resources res = getResources();

        TabHost tabHost = getTabHost();
        Intent i = getIntent();

        Intent intentList = new Intent().setClass(this, ListActivity.class);
        intentList.putExtra(StartActivity.SEARCH_KEY, i.getStringExtra(StartActivity.SEARCH_KEY));
        TabHost.TabSpec tabSpecList = tabHost.newTabSpec("List").setContent(intentList).setIndicator(res.getString(R.string.list_tab));

        Intent intentMap = new Intent().setClass(this, MapPlaceActivity.class);
        TabHost.TabSpec tabSpecMap = tabHost.newTabSpec("Map").setContent(intentMap).setIndicator(res.getString(R.string.map_tab));

        tabHost.addTab(tabSpecList);
        tabHost.addTab(tabSpecMap);
        tabHost.setCurrentTab(0);
    }

}

当我运行应用程序时，出现以下错误：

07-27 14:12:23.676: ERROR/dalvikvm(19527): Could not find class 'com.example.MapPlaceActivity', referenced from method com.example.MainActivity.onCreate
07-27 14:12:23.676: WARN/dalvikvm(19527): VFY: unable to resolve const-class 66 (Lcom/example/MapPlaceActivity;) in Lcom/example/MainActivity;
07-27 14:12:23.686: WARN/dalvikvm(19527): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0)
07-27 14:12:23.686: ERROR/AndroidRuntime(19527): FATAL EXCEPTION: main
        java.lang.NoClassDefFoundError: com.example.MapPlaceActivity
        at com.example.MainActivity.onCreate(MainActivity.java:29)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1072)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1836)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1893)
        at android.app.ActivityThread.access$1500(ActivityThread.java:135)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1054)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:150)
        at android.app.ActivityThread.main(ActivityThread.java:4385)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:507)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
        at dalvik.system.NativeStart.main(Native Method)

但我确实有MapPlaceActivity，其中有代码：

public class MapPlaceActivity extends MapActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map);
        MapView mapView = (MapView) findViewById(R.id.mapview);
        mapView.setBuiltInZoomControls(true);
    }

    @Override
    protected boolean isRouteDisplayed() {
        return false;  //To change body of implemented methods use File | Settings | File Templates.
    }
}

还有我的布局文件（map.xml）：

我的清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="com.example"
          android:versionCode="1"
          android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8"/>
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-library android:name="com.google.android.maps"/>
    <application android:label="@string/app_name">

        <activity android:name=".StartActivity"
                  android:label="@string/app_name"
                  android:theme="@android:style/Theme.Light.NoTitleBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity android:name=".Pref"
                  android:label="@string/settings_label"
                  >
        </activity>
        <activity android:name=".MainActivity"
                  android:theme="@android:style/Theme.Light.NoTitleBar">
        </activity>
        <activity android:name=".MapPlaceActivity"
                  android:label="@string/map_tab"
                  android:theme="@android:style/Theme.Light.NoTitleBar">
        </activity>
        <activity android:name=".ListActivity"
            android:theme="@android:style/Theme.Light.NoTitleBar">
        </activity>

    </application>
</manifest> 

---

我想您需要在清单文件的应用程序标记中添加uses library行

如果您愿意，还可以提供以下标签

<supports-screens
android:anyDensity="true"
android:resizeable="true"
android:largeScreens="true" />

应添加到。。。。

<supports-screens
android:anyDensity="true"
android:resizeable="true"
android:largeScreens="true" />