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                #### 7.1.3 幀動畫 幀動畫是順序播放一組預先定義好的圖片,類似于電影播放。不同于View動畫,系統提供了另外一個類AnimationDrawable來使用幀動畫。幀動畫的使用比較簡單,首先需要通過XML來定義一個AnimationDrawable,如下所示。 // res/drawable/frame_animation.xml <? xml version="1.0" encoding="utf-8"? > <animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false"> <item android:drawable="@drawable/image1" android:duration="500" /> <item android:drawable="@drawable/image2" android:duration="500" /> <item android:drawable="@drawable/image3" android:duration="500" /> </animation-list> 然后將上述的Drawable作為View的背景并通過Drawable來播放動畫即可: Button mButton = (Button)findViewById(R.id.button1); mButton.setBackgroundResource(R.drawable.frame_animation); AnimationDrawable drawable = (AnimationDrawable) mButton.getBackground(); drawable.start(); 幀動畫的使用比較簡單,但是比較容易引起OOM,所以在使用幀動畫時應盡量避免使用過多尺寸較大的圖片。
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