最近遇到了需要播放大量帧动画(100张以上)的需求，使用传统xml帧动画方式，会频繁OOM，为了解决这个问题，进行了几种尝试，目前的解决方案如下：
传统帧动画
- 我们需要在drawable目录下创建动画集animalist.xml
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false"> <item android:drawable="@mipmap/image_1" android:duration="50" /> <item android:drawable="@mipmap/image_2" android:duration="50" /> <!-- 省略... --> <item android:drawable="@mipmap/image_99" android:duration="50" /> <item android:drawable="@mipmap/image_100" android:duration="50" /> </animation-list>
经过尝试，图片不是很大的时候，大概到20几张图片的时候就会OOM
解决方案
写了一个处理类，使用方法很简单下边直接上代码
先贴一下调用代码,真的很简单
FrameLoader.into(mImageView).load(mTest).setEndlessLoop(true).setLoopCount(3).play(200);
直接上代码,懒得看的人可以直接去看Github源码
Github地址
这是核心处理类
/**
* Created with Android Studio.
*
* @author Kimger
* @email kimger@onetos.cc
* @date 2018-7-13 00:01
*/
public class Process {
/**
* 播方动画的相应布局
*/
private ImageView mImageView;
/**
* 播放动画的图片数组
*/
private int[] mImageRes;
/**
* 是否需要停止
*/
private boolean stop;
/**
* 记录播放状态
*/
private boolean playing;
/**
* 当前播放第*张
*/
private int pImageNo;
/**
* 图片刷新频率
*/
private int pImageFrequency;
/**
* 是否无限循环播放
*/
private boolean endlessLoop = false;
/**
* 循环次数，不定义默认为1
*/
private int loopCount = 1;
/**
* 记录当前循环了几次
*/
private int countCache;
private String mTag = getClass().getName();
private static Process mInstance;
private static List<ImageView> mObjects ;
private static Map<ImageView, Process> mProcessMap;
private static Pools.SynchronizedPool<Process> sPool = new Pools.SynchronizedPool<>(20);
/**
* 创建新的对象
*
* @return
*/
public static Process build(ImageView tag){
mInstance = obtain();
mInstance.into(tag);
return mInstance;
}
public static Process obtain(){
Process acquire = sPool.acquire();
return (acquire != null) ? acquire : new Process();
}
public void recycle(){
sPool.release(this);
}
/**
* 设置动画的ImageView
*
* @param pImageView
* @return
*/
private Process into(ImageView pImageView) {
stop = true;
if (mImageView != null) {
mImageView.removeCallbacks(mRunnable);
}
if (pImageView != mImageView) {
stop();
}
this.mImageRes = null;
this.mImageView = pImageView;
return mInstance;
}
/**
* 设置动画数组文件
*
* @param pImageRes
* @return
*/
public Process load(int[] pImageRes) {
this.mImageRes = pImageRes;
return mInstance;
}
/**
* 开始播放
*
* @param pImageNo
* @param frequency
*/
public Process play(int pImageNo, int frequency) {
stop = false;
this.pImageNo = pImageNo;
this.pImageFrequency = frequency;
mImageView.postDelayed(mRunnable, frequency);
return mInstance;
}
public Process play(int frequency) {
return play(0, frequency);
}
private Runnable mRunnable = new Runnable() {
@Override
public void run() {
if (stop) {
playing = false;
return;
} else {
mImageView.setImageResource(mImageRes[pImageNo]);
if (pImageNo >= mImageRes.length - 1) {
countCache++;
if (endlessLoop) {
pImageNo = 0;
play(pImageNo, pImageFrequency);
playing = true;
} else {
if (countCache >= loopCount) {
playing = false;
stop();
return;
} else {
pImageNo = 0;
play(pImageNo, pImageFrequency);
playing = true;
}
}
} else {
play(pImageNo + 1, pImageFrequency);
playing = true;
}
}
}
};
public boolean isStop() {
return stop;
}
private void setStop(boolean stop) {
this.stop = stop;
}
/**
* 停止播放
*/
public void stop() {
setStop(true);
countCache = 0;
if (mImageView != null) {
mImageView.removeCallbacks(mRunnable);
System.gc();
recycle();
}
if (mProcessMap != null) {
mProcessMap.clear();
}
if (mObjects != null) {
mObjects.clear();
}
}
public boolean isPlaying() {
return playing;
}
/**
* 是否无限循环
*/
public Process setEndlessLoop(boolean endlessLoop) {
this.endlessLoop = endlessLoop;
return mInstance;
}
/**
* 循环次数
*/
public Process setLoopCount(int loopCount) {
this.loopCount = loopCount;
return mInstance;
}
}
Manager类，留给后续添加功能的空间
/**
* Created with Android Studio.
*
* @author Kimger
* @email kimger@onetos.cc
* @date 2018-7-13 00:20
*/
public class ProcessManager {
private static ProcessManager mInstance;
public static ProcessManager get(){
if (mInstance == null) {
synchronized (ProcessManager.class){
if (mInstance == null) {
mInstance = new ProcessManager();
}
}
}
return mInstance;
}
}
这是调用类
/**
* Create with Android Studio.
*
* @author Kimger
* @email kimger@onetos.cc
* @date 2018-7-13 00:30
*/
public class FrameLoader {
public static Process into(ImageView tag){
return Process.build(tag);
}
/**
* 此功能暂时无法使用
*/
public static Process getProcessByTag(ImageView tag){
Map<ImageView, Process> imageViewProcessMap = ProcessManager.get().getmProcessMap();
if (imageViewProcessMap != null) {
return imageViewProcessMap.get(tag);
}
return null;
}
}
然后就可以愉快的去使用帧动画了，亲测二百张也没什么问题。
网友评论