Powodowanie OutOfMemoryError w animacji klatka po klatce w Androidzie

Miałem ten sam problem. Android ładuje wszystkie rysunki na raz, więc animacja z wieloma klatkami powoduje ten błąd.

W końcu stworzyłem własną prostą animację Sekwencji:

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;
        }
    }
}

Użycie:

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

Nie zapomnij go zatrzymać...

Spędziłem nad tym dużo czasu i mam dwa różne rozwiązania, oba dobre..

Po pierwsze, problem: 1) Android ładuje wszystkie obrazy DO PAMIĘCI RAM, w nieskompresowanym formacie bitmapy. 2) Android wykorzystuje skalowanie zasobów, więc w telefonie z wyświetlaczem xxxhdpi (takim jak LG G3) każda ramka zajmuje mnóstwo miejsca, więc szybko kończy się pamięć RAM.

Rozwiązanie # 1

Wady: spamuje Twoje dzienniki, ponieważ Android alokuje pamięć na nowe bitmapy i recykling starych. Działa również kiepsko na starszych urządzeniach (Galaxy S1), ale działa ładnie na obecnych telefonach budżetowych (Czytaj: Alcatel C1 za 10 dolarów odebrałem w BestBuy). Drugie rozwiązanie poniżej działa lepiej na starszych urządzeniach, ale w niektórych okolicznościach nadal może zabraknąć pamięci RAM.

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);
}

public 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<>();

            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 | XmlPullParserException e) {
                e.printStackTrace();
            }

            // Run on UI Thread
            new Handler(context.getMainLooper()).post(new Runnable() {
                @Override
                public void run() {
                    if (onDrawableLoadedListener != null) {
                        onDrawableLoadedListener.onDrawableLoaded(myFrames);
                    }
                }
            });
        }
    }).run();
}

public static void animateRawManually(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);
        }
    });
}

public static void animateRawManually(List<MyFrame> myFrames, ImageView imageView, Runnable onComplete) {
    animateRawManually(myFrames, imageView, onComplete, 0);
}

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();
    }
}
}

** Rozwiązanie #2 **

Ładuje zasób XML, przetwarza go i ładuje surowce - w ten sposób omijając skalowanie zasobów Androida (które jest odpowiedzialne za większość OutOfMemoryExceptions) i tworzy AnimationDrawable.

Zalety: działa lepiej na starszych urządzeniach (np. Galaxy S1)

Wady: nadal może zabraknąć pamięci RAM, ponieważ trzyma wszystkie nieskompresowane bitmapy w pamięci (ale są mniejsze, ponieważ nie są skalowane w sposób, w jaki Android normalnie skaluje images)

public static void animateManuallyFromRawResource(int animationDrawableResourceId, ImageView imageView, Runnable onStart, Runnable onComplete) {
    AnimationDrawable animationDrawable = new AnimationDrawable();

    XmlResourceParser parser = imageView.getContext().getResources().getXml(animationDrawableResourceId);

    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")) {
                    Drawable drawable = 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));
                            byte[] bytes = IoUtils.readBytes(imageView.getContext().getResources().openRawResource(resId));
                            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();
        }
    }
    catch (IOException | XmlPullParserException e) {
        e.printStackTrace();
    }

    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));
}

Jeśli nadal masz problemy z pamięcią, użyj mniejszych obrazów... lub zapisać nazwę zasobu + czas trwania i wygenerować tablicę bajtów + Drawable na każdej ramce. Prawie na pewno spowodowałoby to zbyt duże przecięcia między klatkami, ale używa prawie zerowej pamięci RAM.

Stworzyłem klasę animacji, która wyświetla klatki na podstawie przekazywanych zasobów i czasu trwania klatek w programie drawables.

 protected class SceneAnimation{
    private ImageView mImageView;
    private int[] mFrameRess;
    private int[] mDurations;
    private int mDuration;

    private int mLastFrameNo;
    private long mBreakDelay;

 public SceneAnimation(ImageView pImageView, int[] pFrameRess, int[] pDurations){
        mImageView = pImageView;
        mFrameRess = pFrameRess;
        mDurations = pDurations;
        mLastFrameNo = pFrameRess.length - 1;

        mImageView.setImageResource(mFrameRess[0]);
        play(1);
    }

    public SceneAnimation(ImageView pImageView, int[] pFrameRess, int pDuration){
        mImageView = pImageView;
        mFrameRess = pFrameRess;
        mDuration = pDuration;
        mLastFrameNo = pFrameRess.length - 1;

        mImageView.setImageResource(mFrameRess[0]);
        playConstant(1);
    }

    public SceneAnimation(ImageView pImageView, int[] pFrameRess, int pDuration, long pBreakDelay){            
        mImageView = pImageView;
        mFrameRess = pFrameRess;
        mDuration = pDuration;
        mLastFrameNo = pFrameRess.length - 1;
        mBreakDelay = pBreakDelay;

        mImageView.setImageResource(mFrameRess[0]);
        playConstant(1);
    }


    private void play(final int pFrameNo){
        mImageView.postDelayed(new Runnable(){
            public void run() {
                mImageView.setImageResource(mFrameRess[pFrameNo]);
                if(pFrameNo == mLastFrameNo)
                    play(0);
                else
                    play(pFrameNo + 1);
            }
        }, mDurations[pFrameNo]);
    }


    private void playConstant(final int pFrameNo){
        mImageView.postDelayed(new Runnable(){
            public void run() {                    
                mImageView.setImageResource(mFrameRess[pFrameNo]);

                if(pFrameNo == mLastFrameNo)
                    playConstant(0);
                else
                    playConstant(pFrameNo + 1);
            }
        }, pFrameNo==mLastFrameNo && mBreakDelay>0 ? mBreakDelay : mDuration);
    }        
};

Używa się go tak:

 private ImageView mTapScreenTextAnimImgView;    
private final int[] mTapScreenTextAnimRes = {R.drawable.tap0001_b, R.drawable.tap0002_b, R.drawable.tap0003_b, 
        R.drawable.tap0004_b, R.drawable.tap0005_b, R.drawable.tap0006_b, R.drawable.tap0005_b, R.drawable.tap0004_b,
        R.drawable.tap0003_b, R.drawable.tap0002_b, R.drawable.tap0001_b};
private final int mTapScreenTextAnimDuration = 100;
private final int mTapScreenTextAnimBreak = 500;

I in onCreate:

 mTapScreenTextAnimImgView = (ImageView) findViewById(R.id.scene1AnimBottom);
    new SceneAnimation(mTapScreenTextAnimImgView, mTapScreenTextAnimRes, mTapScreenTextAnimDuration, mTapScreenTextAnimBreak);

Miałem ten problem i rozwiązałem go, robiąc dwie następujące rzeczy:

1. Zmniejsz rozdzielczość obrazów animacji o połowę...1/4 rozmiar w nieskompresowanych bajtach.
2. Umieść obrazy w folderze drawable-nodpi, aby nie były skalowane przez Androida dla Ciebie.

Moja animacja nadal nie ładowała się na niektórych telefonach po wykonaniu kroku 1. Krok 2 działa na tych telefonach.

EDIT: I was still doświadczanie awarii po przejściu do aktywności, która odtwarza AnimationDrawable, ale mam ją teraz działającą. Oto dodatkowe rzeczy, które zrobiłem:

1. nie używaj listy animacji w xml. Zamiast tego utwórz AnimationDrawable za każdym razem, gdy musisz go użyć. W przeciwnym razie, następnym razem, gdy załadujesz animację z zasobu, nadal będziesz próbował użyć bitmap, które skończysz recyklingu.
2. Po zakończeniu korzystania z programu AnimationDrawable należy poddać recyklingowi bitmapy. To to magia, która uwalnia pamięć.
3. Użyj monitora Urządzenia z Androidem, aby monitorować przydzielone bajty w stercie.

Oto kod, którego używam do tworzenia AnimationDrawable:

    protected AnimationDrawable CreateLoadingAnimationDrawable()
    {
        AnimationDrawable animation = new AnimationDrawable ();
        animation.OneShot = false;
        for (int i = 0; i < kNumberOfFrames; ++i) {
            int index = (i * 2) + 1;
            string stringIndex = index.ToString ("00");
            string bitmapStringId = kBaseAnimationName + stringIndex;
            int resID = this.Resources.GetIdentifier (bitmapStringId, "drawable", this.PackageName);
            Bitmap bitmap = BitmapFactory.DecodeResource (this.Resources, resID);
            BitmapDrawable frame = new BitmapDrawable (bitmap);
            //Drawable frame = Resources.GetDrawable (resID);
            animation.AddFrame (frame, 111);
        }
        return animation;
    }

I kod do uwolnienia bitmap po ich użyciu. Możesz to zrobić w OnPause lub OnDestroy. _loadingAnimation to moje AnimationDrawable stworzone powyżej. Chciałbym wiedzieć, co SetCallback() robi dla Ciebie w tym przypadku. Skopiowałem to z innego miejsca na Więc.

        if (_loadingAnimation != null) {
            _loadingAnimation.Stop ();
            _loadingImageView.SetBackgroundResource (Resource.Drawable.loading_anim_full7001);
            for (int i = 0; i < _loadingAnimation.NumberOfFrames; ++i) {
                BitmapDrawable frame = _loadingAnimation.GetFrame (i) as BitmapDrawable;
                if (frame != null) {
                    Android.Graphics.Bitmap bitmap = frame.Bitmap;
                    bitmap.Recycle ();
                    frame.SetCallback(null);
                }
            }
            _loadingAnimation.SetCallback(null);
            _loadingAnimation = null;
        }

Ted

Przeportowałem rozwiązanie do Xamarin Android i zrobiłem kilka ulepszeń.

Działa dobrze ze zmianami orientacji, a szczególnie z obrazami o szerokości i wysokości około 300 (im większy obraz, tym dłużej trwa ładowanie obrazu, tym większe migotanie).

using Android.Content;
using Android.Graphics;
using Android.OS;
using Android.Widget;
using System;

namespace ...Droid.Util
{
    public class FramesSequenceAnimation
    {
        private int[] animationFrames;
        private int currentFrame;
        private bool shouldRun;   // true if the animation should continue running. Used to stop the animation
        private bool isRunning;   // true if the animation currently running. prevents starting the animation twice
        private ImageView imageview;
        private Handler handler;
        private int delayMillis;
        private bool oneShot = false;
        private FramesSequenceAnimationListener onAnimationStoppedListener;
        private Bitmap bitmap = null;
        private BitmapFactory.Options bitmapOptions;
        private Action action;

        private static object Lock = new object();

        public interface FramesSequenceAnimationListener
        {
            void AnimationStopped();
        }

        public void SetFramesSequenceAnimationListener(FramesSequenceAnimationListener onAnimationStoppedListener)
        {
            this.onAnimationStoppedListener = onAnimationStoppedListener;
        }

        public int GetCurrentFrame()
        {
            return currentFrame;
        }

        public void SetCurrentFrame(int currentFrame)
        {
            this.currentFrame = currentFrame;
        }

        public FramesSequenceAnimation(FramesSequenceAnimationListener onAnimationStoppedListener, ImageView imageview, int[] animationFrames, int fps)
        {
            this.onAnimationStoppedListener = onAnimationStoppedListener;
            this.imageview = imageview;
            this.animationFrames = animationFrames;

            delayMillis = 1000 / fps;

            currentFrame = -1;
            shouldRun = false;
            isRunning = false;
            handler = new Handler();
            imageview.SetImageResource(this.animationFrames[0]);

            //// use in place bitmap to save GC work (when animation images are the same size & type)
            //if (Build.VERSION.SdkInt >= BuildVersionCodes.Honeycomb)
            //{
            //    Bitmap bmp = ((BitmapDrawable)imageview.Drawable).Bitmap;
            //    int width = bmp.Width;
            //    int height = bmp.Height;
            //    Bitmap.Config config = bmp.GetConfig();
            //    bitmap = Bitmap.CreateBitmap(width, height, config);
            //    bitmapOptions = new BitmapFactory.Options(); // setup bitmap reuse options
            //    bitmapOptions.InBitmap = bitmap; // reuse this bitmap when loading content
            //    bitmapOptions.InMutable = true;
            //    bitmapOptions.InSampleSize = 1;
            //}

            bitmapOptions = newOptions();
            bitmap = decode(bitmapOptions, getNext());
            bitmapOptions.InBitmap = bitmap;
        }

        private BitmapFactory.Options newOptions()
        {
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.InSampleSize = 1;
            options.InMutable = true;
            options.InJustDecodeBounds = true;
            options.InPurgeable = true;
            options.InInputShareable = true;
            options.InPreferredConfig = Bitmap.Config.Rgb565;
            return options;
        }

        private Bitmap decode(BitmapFactory.Options options, int imageRes)
        {
            return BitmapFactory.DecodeResource(imageview.Resources, imageRes, bitmapOptions);
        }

        public void SetOneShot(bool oneShot)
        {
            this.oneShot = oneShot;
        }

        private int getNext()
        {
            currentFrame++;
            if (currentFrame >= animationFrames.Length)
            {
                if (oneShot)
                {
                    shouldRun = false;
                    currentFrame = animationFrames.Length - 1;
                }
                else
                {
                    currentFrame = 0;
                }
            }
            return animationFrames[currentFrame];
        }

        public void stop()
        {
            lock (Lock)
            {
                shouldRun = false;
            }
        }

        public void start()
        {
            lock (Lock)
            {
                shouldRun = true;

                if (isRunning)
                {
                    return;
                }

                Action tempAction = new Action(delegate
                {
                    if (!shouldRun || imageview == null)
                    {
                        isRunning = false;
                        if (onAnimationStoppedListener != null)
                        {
                            onAnimationStoppedListener.AnimationStopped();
                            onAnimationStoppedListener = null;
                            handler.RemoveCallbacks(action);
                        }
                        return;
                    }

                    isRunning = true;

                    handler.PostDelayed(action, delayMillis);

                    if (imageview.IsShown)
                    {
                        int imageRes = getNext();
                        if (bitmap != null)
                        {
                            if (Build.VERSION.SdkInt >= BuildVersionCodes.Honeycomb)
                            {
                                if (bitmap != null && !bitmap.IsRecycled)
                                {
                                    bitmap.Recycle();
                                    bitmap = null;
                                }
                            }

                            try
                            {
                                bitmap = BitmapFactory.DecodeResource(imageview.Resources, imageRes, bitmapOptions);
                            }
                            catch (Exception e)
                            {
                                bitmap.Recycle();
                                bitmap = null;
                                Console.WriteLine("Exception: " + e.StackTrace);
                            }

                            if (bitmap != null)
                            {
                                imageview.SetImageBitmap(bitmap);
                            }
                            else
                            {
                                imageview.SetImageResource(imageRes);
                                bitmap.Recycle();
                                bitmap = null;
                            }
                        }
                        else
                        {
                            imageview.SetImageResource(imageRes);
                        }
                    }
                });

                action = tempAction;

                handler.Post(action);
            }
        }
    }
}

To jest moja klasa ekranu powitalnego: (ta klasa odczytuje obrazy z folderu, który można narysować o nazwie " splash_0001, splash_0002 ...". Więc nie ma potrzeby nazywania zasobów obrazu na tablicy. Zwiększ liczbę klatek na sekundę (FPS), aby przyspieszyć animację).

using Android.App;
using Android.Content;
using Android.OS;
using Android.Widget;
using ...Droid.Base;
using ...Droid.Util;
using System;
using System.Collections.Generic;
using static ...Util.FramesSequenceAnimation;

namespace ...Droid.Activities
{
    [Activity(MainLauncher = true)]
    public class SplashActivity : BaseActivity, FramesSequenceAnimationListener
    {
        private FramesSequenceAnimation framesSequenceAnimation;

        private const string
            IMAGE_NAME_PREFIX = "splash_",
            KEY_CURRENT_FRAME = "key_current_frame";

        private int FPS = 50;

        private int numberOfImages;

        protected override OrientationEnum GetOrientation()
        {
            return OrientationEnum.ORIENTATION_CHECK_DEVICE_SIZE;
        }

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.activity_splash);

            RelativeLayout background = FindViewById<RelativeLayout>(Resource.Id.splash_background);
            background.Click += Click;

            ImageView imageView = FindViewById<ImageView>(Resource.Id.splash_imageview);
            imageView.Click += Click;

            numberOfImages = GetSplashImagesCount();

            framesSequenceAnimation = new FramesSequenceAnimation(this, imageView, GetImageResourcesIDs(), FPS);
            framesSequenceAnimation.SetOneShot(true);

            if (savedInstanceState != null)
            {
                int currentFrame = savedInstanceState.GetInt(KEY_CURRENT_FRAME) + 1;
                if (currentFrame < numberOfImages)
                {
                    framesSequenceAnimation.SetCurrentFrame(currentFrame);
                }
            }

            framesSequenceAnimation.start();
        }

        private int[] GetImageResourcesIDs()
        {
            List<int> list = new List<int>();

            for (int i = 1; i <= numberOfImages; i++)
            {
                var image_name = IMAGE_NAME_PREFIX + i.ToString().PadLeft(4, '0');
                int resID = Resources.GetIdentifier(image_name, "drawable", PackageName);
                list.Add(resID);
            }

            return list.ToArray();
        }

        private int GetSplashImagesCount()
        {
            // Count number of images in drawable folder
            int count = 0;
            var fields = typeof(Resource.Drawable).GetFields();
            foreach (var field in fields)
            {
                if (field.Name.StartsWith(IMAGE_NAME_PREFIX))
                {
                    count++;
                }
            }

            return count;
        }

        private void Click(object sender, EventArgs e)
        {
            framesSequenceAnimation.SetFramesSequenceAnimationListener(null);
            GoToLoginScreen();
        }

        private void GoToLoginScreen()
        {
            Finish();
            StartActivity(new Intent(this, typeof(LoginActivity)));
            OverridePendingTransition(0, Resource.Animation.abc_fade_out);
        }

        void FramesSequenceAnimationListener.AnimationStopped()
        {
            GoToLoginScreen();
        }

        protected override void OnSaveInstanceState(Bundle outState)
        {
            base.OnSaveInstanceState(outState);

            outState.PutInt(KEY_CURRENT_FRAME, framesSequenceAnimation.GetCurrentFrame());
        }
    }
}

Jest to duży problem z sdk, ale można go rozwiązać za pomocą wątków do jednoczesnego ładowania obrazów bitmapowych zamiast ładowania całego obrazu w tym samym czasie.

Rozwiązałem problem outOfMemoryError poprzez brutalne ograniczenie liczby klatek na sekundę i skalowanie obrazów w gimp. W zależności od tego, co robisz, prawdopodobnie ujdzie ci to na sucho z dużo mniejszą liczbą klatek na sekundę, niż byś się spodziewał.

Rozwiązałem ten problem, umieszczając wszystkie obrazy w tablicy i używając opóźnienia po pokazaniu każdego z nich. Tablica źródeł obrazów w res / string <!-- Array table for the pictures to show on the spinner--> <array name="spinner_list"> <item>@drawable/arrows_loop__00000_org</item> <item>@drawable/arrows_loop__00005_org</item> <item >@drawable/arrows_loop__00010_org</item> <item>@drawable/arrows_loop__00015_org</item> <item >@drawable/arrows_loop__00020_org</item> <item >@drawable/arrows_loop__00025_org</item> . . . </array> Ogłaszam o spinner imageView private static ImageView imagespinner;

W mojej klasie nazywam to tutaj:

      final TypedArray imgs = getResources().obtainTypedArray(R.array.spinner_list);
    runimage(imgs, imgs.length());

A potem na runimage robię pętlę z opóźnieniem Tak:

        /* handle the spinner frame by frame */

Public void runimage (final TypedArray array, int index) {

  int size = array.length();

    if(index<size) {// show in sequence the images

    final int localindex= index;

        handler.postDelayed(new Runnable() {
            public void run() {
                imagespinner.setImageResource(array.getResourceId(localindex, -1));// find the picture to show
                runimage(array,(localindex+1));// because use final arg need to do the increase inside
            }
        }, 55);

    }
    else // after show all images go ahead
    {
        textview2.setVisibility(View.VISIBLE);
        handler.postDelayed(myRunnablewait, 2000); // make some time to see text before go to ather fragment
    }

}

Więc uruchamiam Wszystkie zdjęcia z opóźnieniem 55milsec na imagespinner. Po zakończeniu wykonaj zadanie nex.

Podobne do innych odpowiedzi, używając rxjava:

public final class RxSequenceAnimation {
    private static final int[] PNG_RESOURCES = new int[]{
            R.drawable.sequence_frame_00,
            R.drawable.sequence_frame_01,
            R.drawable.sequence_frame_02
    };
    private static final String TAG = "rx-seq-anim";
    private final Resources mResource;
    private final ImageView mImageView;
    private final byte[][] RAW_PNG_DATA = new byte[PNG_RESOURCES.length][];
    private final byte[] buff = new byte[1024];
    private Subscription sub;

    public RxSequenceAnimation(Resources resources, ImageView imageView) {
        mResource = resources;
        mImageView = imageView;
    }

    public void start() {
        sub = Observable
                .interval(16, TimeUnit.MILLISECONDS)
                .map(new Func1<Long, Bitmap>() {
                    @Override
                    public Bitmap call(Long l) {
                        int i = (int) (l % PNG_RESOURCES.length);
                        if (RAW_PNG_DATA[i] == null) {
                            // read raw png data (compressed) if not read already into RAM
                            try {
                                RAW_PNG_DATA[i] = read(PNG_RESOURCES[i]);
                            } catch (IOException e) {
                                Log.e(TAG, "IOException " + String.valueOf(e));
                            }
                            Log.d(TAG, "decoded " + i + " size " + RAW_PNG_DATA[i].length);
                        }
                        // decode directly from RAM - only one full blown bitmap is in RAM at a time
                        return BitmapFactory.decodeByteArray(RAW_PNG_DATA[i], 0, RAW_PNG_DATA[i].length);
                    }
                })
                .subscribeOn(Schedulers.newThread())
                .onBackpressureDrop()
                .observeOn(AndroidSchedulers.mainThread())
                .doOnNext(new Action1<Bitmap>() {
                    @Override
                    public void call(Bitmap b) {
                        mImageView.setImageBitmap(b);
                    }
                })
                .subscribe(LogErrorSubscriber.newInstance(TAG));
    }

    public void stop() {
        if (sub != null) {
            sub.unsubscribe();
        }
    }

    private byte[] read(int resId) throws IOException {
        return streamToByteArray(inputStream(resId));
    }

    private InputStream inputStream(int id) {
        return mResource.openRawResource(id);
    }

    private byte[] streamToByteArray(InputStream is) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int i;
        while ((i = is.read(buff, 0, buff.length)) > 0) {
            baos.write(buff, 0, i);
        }
        byte[] bytes = baos.toByteArray();
        is.close();
        return bytes;
    }
}