android帧动画太多太卡（OOM）解决方案

IO工具类下载 - 使用方法

private void initGif() { ivShowGif = (ImageView) view.findViewById(R.id.ivShowGif); /** * 弃用系统自带帧动画导致的性能占用。改用handler */ MyAnimationDrawable.animateRawManuallyFromXML(R.drawable.anim_gift_forgif, ivShowGif, new Runnable() { @Override public void run() { // TODO onStart } }, new Runnable() { @Override public void run() { // TODO onComplete } }); ```｝ - 工具类 <div class="se-preview-section-delimiter"></div>

package com.rex.p2pyichang.utils.gif;

/** * Created by Rex on 2017/3/30. */

import java.io.IOException; import java.util.ArrayList; import java.util.List;

import org.apache.commons.io.IOUtils; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException;

import android.content.Context; import android.content.res.XmlResourceParser; import android.graphics.BitmapFactory; import android.graphics.drawable.AnimationDrawable; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.os.Handler; import android.widget.ImageView;

/** * 此工具类源于stack over flow * 原文链接:http://stackoverflow.com/questio … nimation-in-android * 主要使用了BitmapFactory.decodeByteArray方法通过底层C来绘制图片,有效防止OOM * 使用了第三方类库:org.apache.commons.io.IOUtils,将Inputstream转为byte字节数组 */ public class MyAnimationDrawable {

private static boolean isLooper; public static class MyFrame { byte[] bytes; int duration; Drawable drawable; boolean isReady = false; } public interface OnDrawableLoadedListener { void onDrawableLoaded(List<MyFrame> myFrames); } /*** * 在animation-list中设置时间 **/ public static void animateRawManuallyFromXML(int resourceId, final ImageView imageView, final Runnable onStart, final Runnable onComplete) { loadRaw(resourceId, imageView.getContext(), new OnDrawableLoadedListener() { @Override public void onDrawableLoaded(List<MyFrame> myFrames) { if (onStart != null) { onStart.run(); } animateRawManually(myFrames, imageView, onComplete); } }); } private static void loadRaw(final int resourceId, final Context context, final OnDrawableLoadedListener onDrawableLoadedListener) { loadFromXml(resourceId, context, onDrawableLoadedListener); } private static void loadFromXml(final int resourceId, final Context context, final OnDrawableLoadedListener onDrawableLoadedListener) { new Thread(new Runnable() { @Override public void run() { final ArrayList<MyFrame> myFrames = new ArrayList<MyFrame>(); XmlResourceParser parser = context.getResources().getXml( resourceId); try { int eventType = parser.getEventType(); while (eventType != XmlPullParser.END_DOCUMENT) { if (eventType == XmlPullParser.START_DOCUMENT) { } else if (eventType == XmlPullParser.START_TAG) { if (parser.getName().equals("oneshot")) { isLooper = parser.getAttributeBooleanValue(0, true); } if (parser.getName().equals("item")) { byte[] bytes = null; int duration = 1000; for (int i = 0; i < parser.getAttributeCount(); i++) { if (parser.getAttributeName(i).equals( "drawable")) { int resId = Integer.parseInt(parser .getAttributeValue(i) .substring(1)); bytes = IOUtils.toByteArray(context .getResources() .openRawResource(resId)); } else if (parser.getAttributeName(i) .equals("duration")) { duration = parser.getAttributeIntValue( i, 1000); } } MyFrame myFrame = new MyFrame(); myFrame.bytes = bytes; myFrame.duration = duration; myFrames.add(myFrame); } } else if (eventType == XmlPullParser.END_TAG) { } else if (eventType == XmlPullParser.TEXT) { } eventType = parser.next(); } } catch (IOException e) { e.printStackTrace(); } catch (XmlPullParserException e2) { // TODO: handle exception e2.printStackTrace(); } // Run on UI Thread new Handler(context.getMainLooper()).post(new Runnable() { @Override public void run() { if (onDrawableLoadedListener != null) { onDrawableLoadedListener.onDrawableLoaded(myFrames); } } }); } }).run(); } // 4 private static void animateRawManually(List<MyFrame> myFrames, ImageView imageView, Runnable onComplete) { animateRawManually(myFrames, imageView, onComplete, 0); } // 5 private static void animateRawManually(final List<MyFrame> myFrames, final ImageView imageView, final Runnable onComplete, final int frameNumber) { final MyFrame thisFrame = myFrames.get(frameNumber); if (frameNumber == 0) { thisFrame.drawable = new BitmapDrawable(imageView.getContext() .getResources(), BitmapFactory.decodeByteArray( thisFrame.bytes, 0, thisFrame.bytes.length)); } else { MyFrame previousFrame = myFrames.get(frameNumber - 1); ((BitmapDrawable) previousFrame.drawable).getBitmap().recycle(); previousFrame.drawable = null; previousFrame.isReady = false; } imageView.setImageDrawable(thisFrame.drawable); new Handler().postDelayed(new Runnable() { @Override public void run() { // Make sure ImageView hasn't been changed to a different Image // in this time if (imageView.getDrawable() == thisFrame.drawable) { if (frameNumber + 1 < myFrames.size()) { MyFrame nextFrame = myFrames.get(frameNumber + 1); if (nextFrame.isReady) { // Animate next frame animateRawManually(myFrames, imageView, onComplete, frameNumber + 1); } else { nextFrame.isReady = true; } } else { animateRawManually(myFrames, imageView, onComplete, 0); if (onComplete != null) { onComplete.run(); } } } } }, thisFrame.duration); // Load next frame if (frameNumber + 1 < myFrames.size()) { new Thread(new Runnable() { @Override public void run() { MyFrame nextFrame = myFrames.get(frameNumber + 1); nextFrame.drawable = new BitmapDrawable(imageView .getContext().getResources(), BitmapFactory.decodeByteArray(nextFrame.bytes, 0, nextFrame.bytes.length)); if (nextFrame.isReady) { // Animate next frame animateRawManually(myFrames, imageView, onComplete, frameNumber + 1); } else { nextFrame.isReady = true; } } }).run(); } }

}

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