android - 在Android中的逐帧动画中导致OutOfMemoryError

Question

我的资源/可绘制文件夹中有很多图像作为框架(比如说大约 200 个)。并使用这些图像我想运行动画。最长的动画是 80 帧。我可以通过单击某些按钮成功地运行动画，但是对于某些动画，它给了我 OutOfMemoryError 说 VM 无法提供这样的内存。它超出了 VM 预算。我计算所有图像的大小约为 10MB。每个图像的大小为 320x480 像素。

我尝试谷歌搜索，发现我需要使用 System.gc() 方法显式调用垃圾收集器。我已经这样做了，但我仍然遇到一些时间错误的内存。谁能帮我解决这个问题。

一些代码:-

ImageView img = (ImageView)findViewById(R.id.xxx);
img.setBackgroundResource(R.anim.angry_tail_animation);
AnimationDrawable mailAnimation = (AnimationDrawable) img.getBackground();
MediaPlayer player = MediaPlayer.create(this.getApplicationContext(), R.raw.angry);
    if(mailAnimation.isRunning()) {
    mailAnimation.stop();
    mailAnimation.start();
        if (player.isPlaying()) {
        player.stop();
        player.start();
    }
    else {
        player.start();
    }
}
else {
    mailAnimation.start();
        if (player.isPlaying()) {
        player.stop();
        player.start();
    }
    else {
        player.start();
    }
}

这是我在点击按钮时编写的代码.....

res/drawable/anim 中的资源文件

<?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/cat_angry0000" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0001" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0002" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0003" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0004" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0005" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0006" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0007" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0008" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0009" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0010" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0011" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0012" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0013" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0014" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0015" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0016" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0017" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0018" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0019" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0020" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0021" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0022" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0023" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0024" android:duration="50"/>

<item android:drawable="@drawable/cat_angry0025" android:duration="50"/>

</animation-list>

** 以上是 setBackgroundResource 中使用的资源文件，同样我还有 10 个文件用于其他不同的动画。 **

错误日志

01-16 22:23:41.594: E/AndroidRuntime(399): FATAL EXCEPTION: main
01-16 22:23:41.594: E/AndroidRuntime(399): java.lang.IllegalStateException: Could not execute method of the activity
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.view.View$1.onClick(View.java:2144)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.view.View.performClick(View.java:2485)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.view.View$PerformClick.run(View.java:9080)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.os.Handler.handleCallback(Handler.java:587)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.os.Handler.dispatchMessage(Handler.java:92)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.os.Looper.loop(Looper.java:123)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.app.ActivityThread.main(ActivityThread.java:3683)
01-16 22:23:41.594: E/AndroidRuntime(399):  at java.lang.reflect.Method.invokeNative(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399):  at java.lang.reflect.Method.invoke(Method.java:507)
01-16 22:23:41.594: E/AndroidRuntime(399):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-16 22:23:41.594: E/AndroidRuntime(399):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-16 22:23:41.594: E/AndroidRuntime(399):  at dalvik.system.NativeStart.main(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399): Caused by: java.lang.reflect.InvocationTargetException
01-16 22:23:41.594: E/AndroidRuntime(399):  at java.lang.reflect.Method.invokeNative(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399):  at java.lang.reflect.Method.invoke(Method.java:507)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.view.View$1.onClick(View.java:2139)
01-16 22:23:41.594: E/AndroidRuntime(399):  ... 11 more
01-16 22:23:41.594: E/AndroidRuntime(399): Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:460)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:336)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:697)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.content.res.Resources.loadDrawable(Resources.java:1709)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.content.res.Resources.getDrawable(Resources.java:581)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.graphics.drawable.AnimationDrawable.inflate(AnimationDrawable.java:267)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:787)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.graphics.drawable.Drawable.createFromXml(Drawable.java:728)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.content.res.Resources.loadDrawable(Resources.java:1694)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.content.res.Resources.getDrawable(Resources.java:581)
01-16 22:23:41.594: E/AndroidRuntime(399):  at android.view.View.setBackgroundResource(View.java:7533)
01-16 22:23:41.594: E/AndroidRuntime(399):  at talking.cat.CatActivity.middleButtonClicked(CatActivity.java:83)

同样的，我有不同的按钮用于不同的动画...... 谢谢

Answer 1

我遇到了同样的问题。 Android 一次加载所有可绘制对象，因此具有多帧的动画会导致此错误。

我最终创建了自己的简单序列动画:

public class AnimationsContainer {
    public int FPS = 30;  // animation FPS

    // single instance procedures
    private static AnimationsContainer mInstance;

    private AnimationsContainer() {
    };

    public static AnimationsContainer getInstance() {
        if (mInstance == null)
            mInstance = new AnimationsContainer();
        return mInstance;
    }

    // animation progress dialog frames
    private int[] mProgressAnimFrames = { R.drawable.logo_30001, R.drawable.logo_30002, R.drawable.logo_30003 };

    // animation splash screen frames
    private int[] mSplashAnimFrames = { R.drawable.logo_ding200480001, R.drawable.logo_ding200480002 };


    /**
     * @param imageView 
     * @return progress dialog animation
     */
    public FramesSequenceAnimation createProgressDialogAnim(ImageView imageView) {
        return new FramesSequenceAnimation(imageView, mProgressAnimFrames);
    }

    /**
     * @param imageView
     * @return splash screen animation
     */
    public FramesSequenceAnimation createSplashAnim(ImageView imageView) {
        return new FramesSequenceAnimation(imageView, mSplashAnimFrames);
    }

    /**
     * AnimationPlayer. Plays animation frames sequence in loop
     */
public class FramesSequenceAnimation {
    private int[] mFrames; // animation frames
    private int mIndex; // current frame
    private boolean mShouldRun; // true if the animation should continue running. Used to stop the animation
    private boolean mIsRunning; // true if the animation currently running. prevents starting the animation twice
    private SoftReference<ImageView> mSoftReferenceImageView; // Used to prevent holding ImageView when it should be dead.
    private Handler mHandler;
    private int mDelayMillis;
    private OnAnimationStoppedListener mOnAnimationStoppedListener;

    private Bitmap mBitmap = null;
    private BitmapFactory.Options mBitmapOptions;

    public FramesSequenceAnimation(ImageView imageView, int[] frames, int fps) {
        mHandler = new Handler();
        mFrames = frames;
        mIndex = -1;
        mSoftReferenceImageView = new SoftReference<ImageView>(imageView);
        mShouldRun = false;
        mIsRunning = false;
        mDelayMillis = 1000 / fps;

        imageView.setImageResource(mFrames[0]);

        // use in place bitmap to save GC work (when animation images are the same size & type)
        if (Build.VERSION.SDK_INT >= 11) {
            Bitmap bmp = ((BitmapDrawable) imageView.getDrawable()).getBitmap();
            int width = bmp.getWidth();
            int height = bmp.getHeight();
            Bitmap.Config config = bmp.getConfig();
            mBitmap = Bitmap.createBitmap(width, height, config);
            mBitmapOptions = new BitmapFactory.Options();
            // setup bitmap reuse options. 
            mBitmapOptions.inBitmap = mBitmap;
            mBitmapOptions.inMutable = true;
            mBitmapOptions.inSampleSize = 1;
        }
    }

    private int getNext() {
        mIndex++;
        if (mIndex >= mFrames.length)
            mIndex = 0;
        return mFrames[mIndex];
    }

    /**
     * Starts the animation
     */
    public synchronized void start() {
        mShouldRun = true;
        if (mIsRunning)
            return;

        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                ImageView imageView = mSoftReferenceImageView.get();
                if (!mShouldRun || imageView == null) {
                    mIsRunning = false;
                    if (mOnAnimationStoppedListener != null) {
                        mOnAnimationStoppedListener.AnimationStopped();
                    }
                    return;
                }

                mIsRunning = true;
                mHandler.postDelayed(this, mDelayMillis);

                if (imageView.isShown()) {
                    int imageRes = getNext();
                    if (mBitmap != null) { // so Build.VERSION.SDK_INT >= 11
                        Bitmap bitmap = null;
                        try {
                            bitmap = BitmapFactory.decodeResource(imageView.getResources(), imageRes, mBitmapOptions);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        if (bitmap != null) {
                            imageView.setImageBitmap(bitmap);
                        } else {
                            imageView.setImageResource(imageRes);
                            mBitmap.recycle();
                            mBitmap = null;
                        }
                    } else {
                        imageView.setImageResource(imageRes);
                    }
                }

            }
        };

        mHandler.post(runnable);
    }

        /**
         * Stops the animation
         */
        public synchronized void stop() {
            mShouldRun = false;
        }
    }
}

用法:

FramesSequenceAnimation anim = AnimationsContainer.getInstance().createSplashAnim(mSplashImageView);
anim.start();

• 别忘了停下来……