小米pad上运行demo,换肤界面中EditText长按会崩溃

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java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.drawable.Drawable.setLevel(int)' on a null object reference at android.widget.Editor$ActionPopupWindow.show(Editor.java:3721) at android.widget.Editor$HandleView$2.run(Editor.java:4274) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5281) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:707)