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我使用viewpager用行動吧標籤和我有佈局兩個碎片，問題是我得到類強制轉換的異常片段和ViewPager ClassCastException異常
我的XML文件看起來像下面
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="2.5" />
<FrameLayout
android:id="@+id/fragment_details"
android:layout_width="0px"
android:layout_height="match_parent"
android:layout_weight="2" />
</LinearLayout>
我在我的活動歌曲和專輯中有兩個選項卡。
它在縱向模式下正確加載，但在橫向模式下顯示類別轉換異常。示於此處
12-08 04:30:08.198: E/AndroidRuntime(2166): FATAL EXCEPTION: main
12-08 04:30:08.198: E/AndroidRuntime(2166): java.lang.ClassCastException: com.nix.music.activity.fragments.SongDetailsFragment
12-08 04:30:08.198: E/AndroidRuntime(2166): at com.nix.music.activity.fragments.AlbumFragMent.showDetails(AlbumFragMent.java:81)
12-08 04:30:08.198: E/AndroidRuntime(2166): at com.nix.music.activity.fragments.AlbumFragMent.access$0(AlbumFragMent.java:77)
12-08 04:30:08.198: E/AndroidRuntime(2166): at com.nix.music.activity.fragments.AlbumFragMent$1.onItemClick(AlbumFragMent.java:52)
12-08 04:30:08.198: E/AndroidRuntime(2166): at android.widget.AdapterView.performItemClick(AdapterView.java:284)
12-08 04:30:08.198: E/AndroidRuntime(2166): at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696)
12-08 04:30:08.198: E/AndroidRuntime(2166): at android.os.Handler.handleCallback(Handler.java:587)
12-08 04:30:08.198: E/AndroidRuntime(2166): at android.os.Handler.dispatchMessage(Handler.java:92)
12-08 04:30:08.198: E/AndroidRuntime(2166): at android.os.Looper.loop(Looper.java:123)
12-08 04:30:08.198: E/AndroidRuntime(2166): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-08 04:30:08.198: E/AndroidRuntime(2166): at java.lang.reflect.Method.invokeNative(Native Method)
12-08 04:30:08.198: E/AndroidRuntime(2166): at java.lang.reflect.Method.invoke(Method.java:521)
12-08 04:30:08.198: E/AndroidRuntime(2166): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-08 04:30:08.198: E/AndroidRuntime(2166): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-08 04:30:08.198: E/AndroidRuntime(2166): at dalvik.system.NativeStart.main(Native Method)
誤差
在雙模AlbumFragMent類代碼是
if (mDualPane) {
AlbumDetailFragment details = (AlbumDetailFragment) getFragmentManager()
.findFragmentById(R.id.fragment_details);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = AlbumDetailFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment
// with this one inside the frame.
FragmentTransaction ft = getFragmentManager()
.beginTransaction();
ft.replace(R.id.fragment_details, details);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
}
和SongFragment類
if (mDualPane) {
getListView().setItemChecked(index, true);
SongDetailsFragment details = (SongDetailsFragment) getFragmentManager()
.findFragmentById(R.id.fragment_details);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = SongDetailsFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment
// with this one inside the frame.
FragmentTransaction ft = getFragmentManager()
.beginTransaction();
ft.replace(R.id.fragment_details, details);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
}
僅在兩個不同的是詳細信息片段正在呼叫的班級。
我做錯了嗎？
還有什麼我們需要照顧的。