Android使用帧动画内存溢出解决方法

Android使用帧动画内存溢出解决方法
https://blog.csdn.net/daitu_liang/article/details/52336015
https://blog.csdn.net/wanmeilang123/article/details/53929484

causing-outofmemoryerror-in-frame-by-frame-animation-in-android
https://stackoverflow.com/questions/8692328/causing-outofmemoryerror-in-frame-by-frame-animation-in-android

Apache Commons IO
http://commons.apache.org/proper/commons-io/description.html

https://github.com/square/leakcanary

LeakCanary 中文使用说明
https://www.liaohuqiu.net/cn/posts/leak-canary-read-me/

---

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;  
  
import org.apache.commons.io.IOUtils;  
import org.xmlpull.v1.XmlPullParser;  
import org.xmlpull.v1.XmlPullParserException;  
  
import java.io.IOException;  
import java.util.ArrayList;  
import java.util.List;  
  
/**** 
 * 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 
 * 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 {  
  
    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().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();  
        }  
    }  
  
    //第二种方法  
    /*** 
     * 代码中控制时间,但不精确 
     * duration = 1000; 
     * ****/  
    public static void animateManuallyFromRawResource(  
            int animationDrawableResourceId, ImageView imageView,  
            Runnable onStart, Runnable onComplete, int duration) throws IOException,  
            XmlPullParserException {  
        AnimationDrawable animationDrawable = new AnimationDrawable();  
  
        XmlResourceParser parser = imageView.getContext().getResources()  
                .getXml(animationDrawableResourceId);  
  
        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")) {  
                    Drawable drawable = null;  
  
                    for (int i = 0; i < parser.getAttributeCount(); i++) {  
                        if (parser.getAttributeName(i).equals("drawable")) {  
                            int resId = Integer.parseInt(parser  
                                    .getAttributeValue(i).substring(1));  
                            byte[] bytes = IOUtils.toByteArray(imageView  
                                    .getContext().getResources()  
                                    .openRawResource(resId));//IOUtils.readBytes  
                            drawable = new BitmapDrawable(imageView  
                                    .getContext().getResources(),  
                                    BitmapFactory.decodeByteArray(bytes, 0,  
                                            bytes.length));  
                        } else if (parser.getAttributeName(i)  
                                .equals("duration")) {  
                            duration = parser.getAttributeIntValue(i, 66);  
                        }  
                    }  
  
                    animationDrawable.addFrame(drawable, duration);  
                }  
  
            } else if (eventType == XmlPullParser.END_TAG) {  
  
            } else if (eventType == XmlPullParser.TEXT) {  
  
            }  
  
            eventType = parser.next();  
        }  
  
        if (onStart != null) {  
            onStart.run();  
        }  
        animateDrawableManually(animationDrawable, imageView, onComplete, 0);  
    }  
  
    private static void animateDrawableManually(  
            final AnimationDrawable animationDrawable,  
            final ImageView imageView, final Runnable onComplete,  
            final int frameNumber) {  
        final Drawable frame = animationDrawable.getFrame(frameNumber);  
        imageView.setImageDrawable(frame);  
        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() == frame) {  
                    if (frameNumber + 1 < animationDrawable.getNumberOfFrames()) {  
                        // Animate next frame  
                        animateDrawableManually(animationDrawable, imageView,  
                                onComplete, frameNumber + 1);  
                    } else {  
                        // Animation complete  
                        if (onComplete != null) {  
                            onComplete.run();  
                        }  
                    }  
                }  
            }  
        }, animationDrawable.getDuration(frameNumber));  
    }  
  
}  

这里需要导入jar,
import org.apache.commons.io.IOUtils; 相关包很多，我只是拿 了需要的jar,下载地址：http://commons.apache.org/proper/commons-io/description.html

4.然后通过上述类，来调用自己的动画xml,

MyAnimationDrawable.animateRawManuallyFromXML(R.drawable.anim_search,  
                        search_scale_iv, new Runnable() {  
  
                            @Override  
                            public void run() {  
                                // TODO onStart  
                                // 动画开始时回调  
                                log.d("","start");  
                                  
                            }  
                        }, new Runnable() {  
  
                            @Override  
                            public void run() {  
                                // TODO onComplete  
                                // 动画结束时回调  
                                log.d("","end");  
                                  
                            }  
                        });  

这样在使用帧动画时，可以有效的适度防止内存溢出