我创建了一个非常简单的Activity,它展示了一个简单的ListFragment,如下所示:
我的Activity:
public class MyActivity extends FragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
FragmentManager fragMgr = getSupportFragmentManager();
FirstFragment list = new FirstFragment();
fragMgr.beginTransaction().add(android.R.id.content, list).commit();
}
}
我的ListFragment:
public class FirstFragment extends ListFragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
inflater.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.main, null);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String listContent[] = {"Larry", "Moe", "Curly"};
setListAdapter(new ArrayAdapter<String>(getActivity(), R.layout.list_item, listContent));
}
...
}
当我启动我的应用程序时,我收到了一个错误消息:
java.lang.IllegalStateException: Activity has been destroyed
E/AndroidRuntime( 947): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
E/AndroidRuntime( 947): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
E/AndroidRuntime( 947): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
E/AndroidRuntime( 947): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
E/AndroidRuntime( 947): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 947): at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime( 947): at android.app.ActivityThread.main(ActivityThread.java:4363)
E/AndroidRuntime( 947): at java.lang.reflect.Method.invokeNative(Native Method)
...
它抱怨Activity已经被销毁,为什么???
P.S. main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingLeft="8dp"
android:paddingRight="8dp">
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="next" />
<ListView
android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#00FF00"
android:layout_weight="1"
android:drawSelectorOnTop="false" />
<TextView
android:id="@android:id/empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FF0000"
android:text="No data" />
</LinearLayout>