从网站上听来,这可能是androidstudio的bug。at java.net.URLClassLoader.findClass(URLClassLoader.java:381)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.C
: android.widget.ImageButton cannot be cast to android.widget.Button
03-15 07:18:55.700: E/AndroidRuntime: E/AndroidRuntime(795): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245: android.widget.ImageButt