Android中的动画详解系列【1】——逐帧动画

逐帧动画其实很简单，下面我们来看一个例子：

<?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/progress_1" android:duration="200"/> 
    <item android:drawable="@drawable/progress_2" android:duration="200"/> 
    <item android:drawable="@drawable/progress_3" android:duration="200"/> 
    <item android:drawable="@drawable/progress_4" android:duration="200"/> 
    <item android:drawable="@drawable/progress_5" android:duration="200"/> 
    <item android:drawable="@drawable/progress_6" android:duration="200"/> 
    <item android:drawable="@drawable/progress_7" android:duration="200"/> 
    <item android:drawable="@drawable/progress_8" android:duration="200"/> 
</animation-list>

android:oneshot="false"的意思是循环播放

界面布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <Button 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开始"
        android:onClick="start"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="停止"
        android:onClick="stop"/>
	<ImageView
	    android:id="@+id/iv"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:background="@anim/zhuzhen"
	    android:layout_gravity="center"/>
</LinearLayout>

MainActivity.java

package com.example.testanimation;

import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends ActionBarActivity {
	private AnimationDrawable anim;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		ImageView iv = (ImageView) findViewById(R.id.iv);
		anim = (AnimationDrawable) iv.getBackground();
		
	}
	
	public void start(View view){
		anim.start();
	}
	
	public void stop(View view){
		anim.stop();
	}
}

运行效果：