y/AccessibilityEventSource.html?is-external=true" title="android.view.accessibility中的类或接口">AccessibilityEventSource</a>, android.graphics.drawable.<a href="http://androiddoc.qiniudn.com/reference/android/graphics/drawable/Drawable.Callback.html?is-external=true" title="android.graphics.drawable中的类或接口">Drawable.Callback</a>, android.view.<a href="http://androiddoc.qiniudn.com/reference/android/view/KeyEvent.Callback.html?is-external=true" title="android.view中的类或接口">KeyEven