強制的に画面の向きを変更する

Question

"Ctrl-F11"を押して画面を回転させると、アプリケーションが強制終了されます。ここにエラーログがあります：

01-02 13:47:30.663: E/AndroidRuntime(498): FATAL EXCEPTION: main 
01-02 13:47:30.663: E/AndroidRuntime(498): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ecnu.sei.manuzhang.study/com.ecnu.sei.manuzhang.study.Main}: java.lang.ClassCastException: android.widget.ExpandableListView$SavedState 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2832) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.ActivityThread.access$1600(ActivityThread.java:117) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.os.Handler.dispatchMessage(Handler.java:99) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.os.Looper.loop(Looper.java:130) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.ActivityThread.main(ActivityThread.java:3683) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at java.lang.reflect.Method.invokeNative(Native Method) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at java.lang.reflect.Method.invoke(Method.java:507) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at dalvik.system.NativeStart.main(Native Method) 
01-02 13:47:30.663: E/AndroidRuntime(498): Caused by: java.lang.ClassCastException: android.widget.ExpandableListView$SavedState 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.widget.ListView.onRestoreInstanceState(ListView.java:3763) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.View.dispatchRestoreInstanceState(View.java:6278) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchThawSelfOnly(ViewGroup.java:1228) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.widget.AdapterView.dispatchRestoreInstanceState(AdapterView.java:767) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:1215) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.view.View.restoreHierarchyState(View.java:6257) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState(PhoneWindow.java:1486) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.Activity.onRestoreInstanceState(Activity.java:844) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.TabActivity.onRestoreInstanceState(TabActivity.java:58) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.Activity.performRestoreInstanceState(Activity.java:816) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1096) 
01-02 13:47:30.663: E/AndroidRuntime(498):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1625) 
01-02 13:47:30.663: E/AndroidRuntime(498):  ... 12 more 

これは、ExpandableListViewと関係があります。このように、私はここに疑わ活動とそのレイアウトを添付：

public class StudyHalls extends ExpanableListActivity { 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    Log.d(TAG, "on create"); 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.halls); 
      ... 
    } 
    ... 
} 

halls.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:orientation="vertical" > 

<ExpandableListView 
    android:id="@id/android:list" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
/> 

</LinearLayout> 

Answer 1

言及向きを変更し、アプリがまだ他にクラッシュしたかどうかを確認するには、次のタグをCTRL + F12キーを使用しますクラス名の前にマニフェストファイルandroid:configChanges="keyboardHidden|orientation"

Answer 2

onRestoreInstaceState()デリゲートを使用しているようです。この作品は、デフォルトのビューでのみうまくいきます。ここのようなカスタムビューの場合は、マニフェストのアクティビティタグにandroid:configChanges="orientation"を使用し、onRestoreInstaceState()を削除してください。