java android.support.v4.widget.DrawerLayout 未找到
android.support.v4.widget.DrawerLayout;当我测试应用程序时，在我的手机上找不到。为什么会发生这种情况，我该如何修复它？
我还不知道，但我认为我可能有同样的问题，如果他们确实导致任何问题。android.support.v4.view.GravityCompat;android.support.v4.app.ActionBarDrawerToggle;
我以前从未遇到过任何问题，但现在它不起作用了。我有android.support.v4 lib（五月一个）。android.support.v4.*;
编辑：更好的错误消息
我的错误
05-27 19:46:21.230: E/jdwp(11659): Failed sending reply to debugger: Broken pipe
05-27 19:46:21.290: W/dalvikvm(11659): VFY: unable to resolve virtual method 30: Landroid/support/v4/widget/DrawerLayout;.closeDrawer (Landroid/view/View;)V
05-27 19:46:21.290: W/dalvikvm(11659): VFY: unable to resolve virtual method 27: Landroid/support/v4/app/ActionBarDrawerToggle;.onConfigurationChanged (Landroid/content/res/Configuration;)V
05-27 19:46:21.290: E/dalvikvm(11659): Could not find class 'android.support.v4.widget.DrawerLayout', referenced from method com.MainActivity.onCreate
05-27 19:46:21.290: W/dalvikvm(11659): VFY: unable to resolve check-cast 16 (Landroid/support/v4/widget/DrawerLayout;) in Lcom/MainActivity;
05-27 19:46:21.290: W/dalvikvm(11659): VFY: unable to resolve virtual method 28: Landroid/support/v4/app/ActionBarDrawerToggle;.onOptionsItemSelected (Landroid/view/MenuItem;)Z
05-27 19:46:21.290: W/dalvikvm(11659): VFY: unable to resolve virtual method 29: Landroid/support/v4/app/ActionBarDrawerToggle;.syncState ()V
05-27 19:46:21.290: W/dalvikvm(11659): VFY: unable to resolve virtual method 31: Landroid/support/v4/widget/DrawerLayout;.isDrawerOpen (Landroid/view/View;)Z
05-27 19:46:21.290: W/dalvikvm(11659): Unable to resolve superclass of Lcom/MainActivity$1; (14)
05-27 19:46:21.290: W/dalvikvm(11659): Link of class 'Lcom/MainActivity$1;' failed
05-27 19:46:21.340: W/dalvikvm(11659): threadid=1: thread exiting with uncaught exception (group=0x40bc71f8)
05-27 19:16:42.404: E/dalvikvm(10623): Could not find class 'android.support.v4.widget.DrawerLayout', referenced from method com.MainActivity.onCreate
05-27 19:16:42.464: E/AndroidRuntime(10623): FATAL EXCEPTION: main
05-27 19:16:42.464: E/AndroidRuntime(10623): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.MainActivity}: android.view.InflateException: Binary XML file line #3: Error inflating class android.support.v4.widget.DrawerLayout
