在 2.2 错误上运行片段 - 找不到类答案

【问题标题】：Running fragments on 2.2 error - Could not find class在 2.2 错误上运行片段 - 找不到类
【发布时间】：2012-09-20 14:14:46
【问题描述】：

我正在尝试使我的应用向后兼容 Android 2.2。

我已经完成了 Fragments、ListFragments、FragmentPagerAdapter 和 ActionBarSherlock。

我已经包含了 android 支持库，并且构建在我的 android 4.1 设备上完美运行，但在 2.2 设备上，我得到以下内容：

09-21 00:10:32.867: I/dalvikvm(1229): Failed resolving Lanother/music/player/AlbumListFragment; interface 521 'Landroid/widget/SearchView$OnQueryTextListener;'
09-21 00:10:32.877: W/dalvikvm(1229): Link of class 'Lanother/music/player/AlbumListFragment;' failed
09-21 00:10:32.877: E/dalvikvm(1229): Could not find class 'another.music.player.AlbumListFragment', referenced from method another.music.player.MainActivity.<init>
09-21 00:10:32.877: W/dalvikvm(1229): VFY: unable to resolve new-instance 531 (Lanother/music/player/AlbumListFragment;) in Lanother/music/player/MainActivity;
09-21 00:10:32.877: I/dalvikvm(1229): Could not find method another.music.player.MainActivity.getActionBar, referenced from method another.music.player.MainActivity.onCreate
09-21 00:10:32.887: W/dalvikvm(1229): VFY: unable to resolve virtual method 3906: Lanother/music/player/MainActivity;.getActionBar ()Landroid/app/ActionBar;
09-21 00:10:32.887: I/dalvikvm(1229): Failed resolving Lanother/music/player/AlbumListFragment; interface 521 'Landroid/widget/SearchView$OnQueryTextListener;'
09-21 00:10:32.887: W/dalvikvm(1229): Link of class 'Lanother/music/player/AlbumListFragment;' failed
09-21 00:10:32.887: E/dalvikvm(1229): Could not find class 'another.music.player.AlbumListFragment', referenced from method another.music.player.MainActivity.onListItemClicked
09-21 00:10:32.887: W/dalvikvm(1229): VFY: unable to resolve new-instance 531 (Lanother/music/player/AlbumListFragment;) in Lanother/music/player/MainActivity;
09-21 00:10:32.887: I/dalvikvm(1229): Failed resolving Lanother/music/player/SongListFragment; interface 521 'Landroid/widget/SearchView$OnQueryTextListener;'
09-21 00:10:32.887: W/dalvikvm(1229): Link of class 'Lanother/music/player/SongListFragment;' failed
09-21 00:10:32.887: E/dalvikvm(1229): Could not find class 'another.music.player.SongListFragment', referenced from method another.music.player.MainActivity.onListItemClicked
09-21 00:10:32.887: W/dalvikvm(1229): VFY: unable to resolve new-instance 576 (Lanother/music/player/SongListFragment;) in Lanother/music/player/MainActivity;
09-21 00:10:32.887: I/dalvikvm(1229): Could not find method another.music.player.MainActivity.getActionBar, referenced from method another.music.player.MainActivity.onOptionsItemSelected
09-21 00:10:32.887: W/dalvikvm(1229): VFY: unable to resolve virtual method 3906: Lanother/music/player/MainActivity;.getActionBar ()Landroid/app/ActionBar;
09-21 00:10:32.887: I/dalvikvm(1229): Failed resolving Lanother/music/player/AlbumListFragment; interface 521 'Landroid/widget/SearchView$OnQueryTextListener;'
09-21 00:10:32.887: W/dalvikvm(1229): Link of class 'Lanother/music/player/AlbumListFragment;' failed
09-21 00:10:32.887: E/dalvikvm(1229): Could not find class 'another.music.player.AlbumListFragment', referenced from method another.music.player.MainActivity.onOptionsItemSelected
09-21 00:10:32.887: W/dalvikvm(1229): VFY: unable to resolve new-instance 531 (Lanother/music/player/AlbumListFragment;) in Lanother/music/player/MainActivity;
09-21 00:10:32.897: I/dalvikvm(1229): Could not find method android.support.v4.app.FragmentActivity.getActionBar, referenced from method another.music.player.ArtistListFragment.onListItemClick
09-21 00:10:32.897: W/dalvikvm(1229): VFY: unable to resolve virtual method 810: Landroid/support/v4/app/FragmentActivity;.getActionBar ()Landroid/app/ActionBar;

我已经玩了几个小时了，但我就是不知道该尝试什么。任何建议表示赞赏。如果您需要查看一些代码，请告诉我。

谢谢。

【问题讨论】：

没有看到代码，我们只能猜测......你使用的是getSupportFragmentManager还是getFragmentManager？要使用支持库，您应该使用前者......以及FragmentActivity 而不是普通的Activity。
我正在使用 getSupportFragmentManager。很抱歉，经过这么长时间的努力，查看堆栈跟踪给了我一些额外的提示 - 我刚刚解决了这个问题。我很确定 ActionBarSherlock 不支持 SearchView$OnQueryTextListener ，所以我把它拿出来，它现在工作正常。明天我会给出一个正确的答案-我必须睡觉！

标签： android android-fragments android-compatibility

【解决方案1】：

在阅读了我自己的 SO 问题后，我意识到我没有正确解释以下内容：

09-21 00:10:32.867: I/dalvikvm(1229): Failed resolving Lanother/music/player/AlbumListFragment; interface 521 'Landroid/widget/SearchView$OnQueryTextListener;

ActionBarSherlock 似乎不支持 onQueryTextListener 和其他一些元素。反正我也不需要这些方法，所以我把它们从ativity中去掉了，问题就解决了。

我想onQueryTextChange在4.1设备上是原生支持的，但在2.2设备上（actionBar由ActionBarsherlock支持），这些方法不支持。

【讨论】：