Android解决大量帧动画内存泄漏问题

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/questions/8692328/causing-outofmemoryerror-in-frame-by-frame-animation-in-android * 通过底层C来绘制图片,有效防止OOM * *******/ public class MyAnimationDrawable { public static class MyFrame { byte[] bytes; int duration; Drawable drawable; boolean isReady = false; } public interface OnDrawableLoadedListener { public void onDrawableLoaded(List<MyFrame> myFrames); } // 1 /*** * 性能更优 * 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); } }); } // 2 private static void loadRaw(final int resourceId, final Context context, final OnDrawableLoadedListener onDrawableLoadedListener) { loadFromXml(resourceId, context, onDrawableLoadedListener); } // 3 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("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 { 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().g