Android(安卓)Animation之frame animation

Frame animation由一系列的静态图片构成，并且按照一定的顺序连续显示，类似电影的感觉。

使用animation-list创建图片的序列，属性android:oneshot表示是否循环播放。每个图片使用item标签包含在animation-list中，item包括android:drawable和android:duration属性，分别表示图片资源的id和每张图片的显示时间。

Frame代码如下

<?xml version="1.0" encoding="utf-8"?><animation-list     xmlns:android="http://schemas.android.com/apk/res/android"    android:oneshot="true" >        <item android:drawable="@drawable/number_0" android:duration="600" />    <item android:drawable="@drawable/number_1" android:duration="600" />    <item android:drawable="@drawable/number_2" android:duration="600" />    <item android:drawable="@drawable/number_3" android:duration="600" />    <item android:drawable="@drawable/number_4" android:duration="600" />    <item android:drawable="@drawable/number_5" android:duration="600" />    <item android:drawable="@drawable/number_6" android:duration="600" />    <item android:drawable="@drawable/number_7" android:duration="600" />    <item android:drawable="@drawable/number_8" android:duration="600" />    <item android:drawable="@drawable/number_9" android:duration="600" /></animation-list>

Activity代码如下

package com.none.funcynumber;import android.os.Bundle;import android.app.Activity;import android.graphics.drawable.AnimationDrawable;import android.graphics.drawable.Drawable;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;public class FancyActivity extends Activity {private AnimationDrawable jumpAnim;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);final ImageView number = (ImageView) findViewById(R.id.number);final AnimationDrawable animNumber = (AnimationDrawable) number.getDrawable();number.post(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubanimNumber.start();}});Button incr = (Button) findViewById(R.id.incr);incr.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubAnimationDrawable incrAnim = (AnimationDrawable) getResources().getDrawable(R.anim.increase);number.setImageDrawable(incrAnim);incrAnim.start();}});Button decr = (Button) findViewById(R.id.decr);decr.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubAnimationDrawable decrAnim = (AnimationDrawable) getResources().getDrawable(R.anim.decrease);number.setImageDrawable(decrAnim);decrAnim.start();}});jumpAnim = subAnimation(animNumber, 0, 10);Drawable standingStill = getResources() .getDrawable(R.drawable.number_0);jumpAnim.addFrame(standingStill, 600);jumpAnim.setOneShot(true);Button jump = (Button) findViewById(R.id.jump);jump.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubnumber.setImageDrawable(jumpAnim);jumpAnim.start();jumpAnim.setVisible(true, true);jumpAnim.setAlpha(0x80);}});}private AnimationDrawable subAnimation(AnimationDrawable src, int start,int end) {AnimationDrawable subAnim = new AnimationDrawable();subAnim.setOneShot(src.isOneShot());for (int i = start; i < end; i++) {int index = (int) (Math.random() * 1.5 * i);subAnim.addFrame(src.getFrame(index), src.getDuration(index));}return subAnim;}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.fancy, menu);return true;}}

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