53、Gif 控件GifView 的使用,播放gif图片

GifView 是一个为了解决android中现在没有直接显示gif的view,只能通过mediaplay来显示这个问题的项目，其用法和 ImageView一样，支持gif图片。可监视GIF是否加载成功。

GifView的功能： 播放Gif图片 Gif动画监听

Android GifView 的用法：

GifAction.java 观察者类，监视GIF是否加载成功
GifFrame.java 里面三个成员：当前图片、延时、下张Frame的链接。
GifDecoder.java 解码线程类
GifView.java 主类，包括常用方法，如GifView构造方法、设置图片源、延迟、绘制等。

public interface GifAction {
    /**
     * gif解码观察者
     * @param parseStatus 解码是否成功，成功会为true
     * @param frameIndex 当前解码的第几帧，当全部解码成功后，这里为-1
     */
    public void parseOk(boolean parseStatus,int frameIndex);
}

import android.graphics.Bitmap;

public class GifFrame {
    /**
     * 构造函数
     * @param im 图片
     * @param del 延时
     */
    public GifFrame(Bitmap im, int del) {
        image = im;
        delay = del;
    }
    /**图片*/
    public Bitmap image;
    /**延时*/
    public int delay;
    /**下一帧*/
    public GifFrame nextFrame = null;
}

  1  import java.io.ByteArrayInputStream;
import java.io.InputStream;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;

public class GifDecoder extends Thread {

    /** 状态：正在解码中 */
    public static final int STATUS_PARSING = 0;
    /** 状态：图片格式错误 */
    public static final int STATUS_FORMAT_ERROR = 1;
    /** 状态：打开失败 */
    public static final int STATUS_OPEN_ERROR = 2;
    /** 状态：解码成功 */
    public static final int STATUS_FINISH = -1;

    private InputStream in;
    private int status;

    public int width; // full image width
    public int height; // full image height
    private boolean gctFlag; // global color table used
    private int gctSize; // size of global color table
    private int loopCount = 1; // iterations; 0 = repeat forever

    private int[] gct; // global color table
    private int[] lct; // local color table
    private int[] act; // active color table

    private int bgIndex; // background color index
    private int bgColor; // background color
    private int lastBgColor; // previous bg color
    private int pixelAspect; // pixel aspect ratio

    private boolean lctFlag; // local color table flag
    private boolean interlace; // interlace flag
    private int lctSize; // local color table size

    private int ix, iy, iw, ih; // current image rectangle
    private int lrx, lry, lrw, lrh;
    private Bitmap image; // current frame
    private Bitmap lastImage; // previous frame
    private GifFrame currentFrame = null;

    private boolean isShow = false;

    // current data block
    private byte[] block = new byte[256];
    private int blockSize = 0; // block size

    // last graphic control extension info
    private int dispose = 0;
    // 0=no action; 1=leave in place; 2=restore to bg; 3=restore to prev
    private int lastDispose = 0;
    // use transparent color
    private boolean transparency = false;
    // delay in milliseconds
    private int delay = 0;
    // transparent color index
    private int transIndex;

    private static final int MaxStackSize = 4096;
    // max decoder pixel stack size

    // LZW decoder working arrays
    private short[] prefix;
    private byte[] suffix;
    private byte[] pixelStack;
    private byte[] pixels;
    // frames read from current file
    private GifFrame gifFrame;
    private int frameCount;

    private GifAction action = null;

    private byte[] gifData = null;

    public GifDecoder(byte[] data, GifAction act) {
        gifData = data;
        action = act;
    }

    public GifDecoder(InputStream is, GifAction act) {
        in = is;
        action = act;
    }

    public void run() {
        if (in != null) {
            readStream();
        } else if (gifData != null) {
            readByte();
        }
    }

    /**
     * 释放资源
     */
    public void free() {
        GifFrame fg = gifFrame;
        while (fg != null) {
            fg.image = null;
            fg = null;
            gifFrame = gifFrame.nextFrame;
            fg = gifFrame;
        }
        if (in != null) {
            try {
                in.close();
            } catch (Exception ex) {
            }
            in = null;
        }
        gifData = null;
    }

    /**
     * 当前状态
     * @return
     */
    public int getStatus() {
        return status;
    }

    /**
     * 解码是否成功，成功返回true
     * @return 成功返回true，否则返回false
     */
    public boolean parseOk() {
        return status == STATUS_FINISH;
    }

    /**
     * 取某帧的延时时间
     * @param n
     *            第几帧
     * @return 延时时间，毫秒
     */
    public int getDelay(int n) {
        delay = -1;
        if ((n >= 0) && (n < frameCount)) {
            // delay = ((GifFrame) frames.elementAt(n)).delay;
            GifFrame f = getFrame(n);
            if (f != null)
                delay = f.delay;
        }
        return delay;
    }

    /**
     * 取所有帧的延时时间
     * @return
     */
    public int[] getDelays() {
        GifFrame f = gifFrame;
        int[] d = new int[frameCount];
        int i = 0;
        while (f != null && i < frameCount) {
            d[i] = f.delay;
            f = f.nextFrame;
            i++;
        }
        return d;
    }

    /**
     * 取总帧 数
     * @return 图片的总帧数
     */
    public int getFrameCount() {
        return frameCount;
    }

    /**
     * 取第一帧图片
     * @return
     */
    public Bitmap getImage() {
        return getFrameImage(0);
    }

    public int getLoopCount() {
        return loopCount;
    }

    private void setPixels() {
        int[] dest = new int[width * height];
        // fill in starting image contents based on last image's dispose code
        if (lastDispose > 0) {
            if (lastDispose == 3) {
                // use image before last
                int n = frameCount - 2;
                if (n > 0) {
                    lastImage = getFrameImage(n - 1);
                } else {
                    lastImage = null;
                }
            }
            if (lastImage != null) {
                lastImage.getPixels(dest, 0, width, 0, 0, width, height);
                // copy pixels
                if (lastDispose == 2) {
                    // fill last image rect area with background color
                    int c = 0;
                    if (!transparency) {
                        c = lastBgColor;
                    }
                    for (int i = 0; i < lrh; i++) {
                        int n1 = (lry + i) * width + lrx;
                        int n2 = n1 + lrw;
                        for (int k = n1; k < n2; k++) {
                            dest[k] = c;
                        }
                    }
                }
            }
        }

        // copy each source line to the appropriate place in the destination
        int pass = 1;
        int inc = 8;
        int iline = 0;
        for (int i = 0; i < ih; i++) {
            int line = i;
            if (interlace) {
                if (iline >= ih) {
                    pass++;
                    switch (pass) {
                    case 2:
                        iline = 4;
                        break;
                    case 3:
                        iline = 2;
                        inc = 4;
                        break;
                    case 4:
                        iline = 1;
                        inc = 2;
                    }
                }
                line = iline;
                iline += inc;
            }
            line += iy;
            if (line < height) {
                int k = line * width;
                int dx = k + ix; // start of line in dest
                int dlim = dx + iw; // end of dest line
                if ((k + width) < dlim) {
                    dlim = k + width; // past dest edge
                }
                int sx = i * iw; // start of line in source
                while (dx < dlim) {
                    // map color and insert in destination
                    int index = ((int) pixels[sx++]) & 0xff;
                    int c = act[index];
                    if (c != 0) {
                        dest[dx] = c;
                    }
                    dx++;
                }
            }
        }
        image = Bitmap.createBitmap(dest, width, height, Config.ARGB_4444);
    }

    /**
     * 取第几帧的图片
     * 
     * @param n
     *            帧数
     * @return 可画的图片，如果没有此帧或者出错，返回null
     */
    public Bitmap getFrameImage(int n) {
        GifFrame frame = getFrame(n);
        if (frame == null)
            return null;
        else
            return frame.image;
    }

    /**
     * 取当前帧图片
     * 
     * @return 当前帧可画的图片
     */
    public GifFrame getCurrentFrame() {
        return currentFrame;
    }

    /**
     * 取第几帧，每帧包含了可画的图片和延时时间
     * 
     * @param n
     *            帧数
     * @return
     */
    public GifFrame getFrame(int n) {
        GifFrame frame = gifFrame;
        int i = 0;
        while (frame != null) {
            if (i == n) {
                return frame;
            } else {
                frame = frame.nextFrame;
            }
            i++;
        }
        return null;
    }

    /**
     * 重置，进行本操作后，会直接到第一帧
     */
    public void reset() {
        currentFrame = gifFrame;
    }

    /**
     * 下一帧，进行本操作后，通过getCurrentFrame得到的是下一帧
     * 
     * @return 返回下一帧
     */
    public GifFrame next() {
        if (isShow == false) {
            isShow = true;
            return gifFrame;
        } else {
            if (status == STATUS_PARSING) {
                if (currentFrame.nextFrame != null)
                    currentFrame = currentFrame.nextFrame;
                // currentFrame = gifFrame;
            } else {
                currentFrame = currentFrame.nextFrame;
                if (currentFrame == null) {
                    currentFrame = gifFrame;
                }
            }
            return currentFrame;
        }
    }

    private int readByte() {
        in = new ByteArrayInputStream(gifData);
        gifData = null;
        return readStream();
    }

    // public int read(byte[] data){
    // InputStream is = new ByteArrayInputStream(data);
    // return read(is);
    // }

    private int readStream() {
        init();
        if (in != null) {
            readHeader();
            if (!err()) {
                readContents();
                if (frameCount < 0) {
                    status = STATUS_FORMAT_ERROR;
                    action.parseOk(false, -1);
                } else {
                    status = STATUS_FINISH;
                    action.parseOk(true, -1);
                }
            }
            try {
                in.close();
            } catch (Exception e) {
                e.printStackTrace();
            }

        } else {
            status = STATUS_OPEN_ERROR;
            action.parseOk(false, -1);
        }
        return status;
    }

    private void decodeImageData() {
        int NullCode = -1;
        int npix = iw * ih;
        int available, clear, code_mask, code_size, end_of_information, 
                  in_code, old_code, bits, code, count, i, datum, data_size, first, top, bi, pi;

        if ((pixels == null) || (pixels.length < npix)) {
            pixels = new byte[npix]; // allocate new pixel array
        }
        if (prefix == null) {
            prefix = new short[MaxStackSize];
        }
        if (suffix == null) {
            suffix = new byte[MaxStackSize];
        }
        if (pixelStack == null) {
            pixelStack = new byte[MaxStackSize + 1];
        }
        // Initialize GIF data stream decoder.
        data_size = read();
        clear = 1 << data_size;
        end_of_information = clear + 1;
        available = clear + 2;
        old_code = NullCode;
        code_size = data_size + 1;
        code_mask = (1 << code_size) - 1;
        for (code = 0; code < clear; code++) {
            prefix[code] = 0;
            suffix[code] = (byte) code;
        }

        // Decode GIF pixel stream.
        datum = bits = count = first = top = pi = bi = 0;
        for (i = 0; i < npix;) {
            if (top == 0) {
                if (bits < code_size) {
                    // Load bytes until there are enough bits for a code.
                    if (count == 0) {
                        // Read a new data block.
                        count = readBlock();
                        if (count <= 0) {
                            break;
                        }
                        bi = 0;
                    }
                    datum += (((int) block[bi]) & 0xff) << bits;
                    bits += 8;
                    bi++;
                    count--;
                    continue;
                }
                // Get the next code.
                code = datum & code_mask;
                datum >>= code_size;
                bits -= code_size;

                // Interpret the code
                if ((code > available) || (code == end_of_information)) {
                    break;
                }
                if (code == clear) {
                    // Reset decoder.
                    code_size = data_size + 1;
                    code_mask = (1 << code_size) - 1;
                    available = clear + 2;
                    old_code = NullCode;
                    continue;
                }
                if (old_code == NullCode) {
                    pixelStack[top++] = suffix[code];
                    old_code = code;
                    first = code;
                    continue;
                }
                in_code = code;
                if (code == available) {
                    pixelStack[top++] = (byte) first;
                    code = old_code;
                }
                while (code > clear) {
                    pixelStack[top++] = suffix[code];
                    code = prefix[code];
                }
                first = ((int) suffix[code]) & 0xff;
                // Add a new string to the string table,
                if (available >= MaxStackSize) {
                    break;
                }
                pixelStack[top++] = (byte) first;
                prefix[available] = (short) old_code;
                suffix[available] = (byte) first;
                available++;
                if (((available & code_mask) == 0)
                        && (available < MaxStackSize)) {
                    code_size++;
                    code_mask += available;
                }
                old_code = in_code;
            }

            // Pop a pixel off the pixel stack.
            top--;
            pixels[pi++] = pixelStack[top];
            i++;
        }
        for (i = pi; i < npix; i++) {
            pixels[i] = 0; // clear missing pixels
        }
    }

    private boolean err() {
        return status != STATUS_PARSING;
    }

    private void init() {
        status = STATUS_PARSING;
        frameCount = 0;
        gifFrame = null;
        gct = null;
        lct = null;
    }

    private int read() {
        int curByte = 0;
        try {

            curByte = in.read();
        } catch (Exception e) {
            status = STATUS_FORMAT_ERROR;
        }
        return curByte;
    }

    private int readBlock() {
        blockSize = read();
        int n = 0;
        if (blockSize > 0) {
            try {
                int count = 0;
                while (n < blockSize) {
                    count = in.read(block, n, blockSize - n);
                    if (count == -1) {
                        break;
                    }
                    n += count;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            if (n < blockSize) {
                status = STATUS_FORMAT_ERROR;
            }
        }
        return n;
    }

    private int[] readColorTable(int ncolors) {
        int nbytes = 3 * ncolors;
        int[] tab = null;
        byte[] c = new byte[nbytes];
        int n = 0;
        try {
            n = in.read(c);
        } catch (Exception e) {
            e.printStackTrace();
        }
        if (n < nbytes) {
            status = STATUS_FORMAT_ERROR;
        } else {
            tab = new int[256]; // max size to avoid bounds checks
            int i = 0;
            int j = 0;
            while (i < ncolors) {
                int r = ((int) c[j++]) & 0xff;
                int g = ((int) c[j++]) & 0xff;
                int b = ((int) c[j++]) & 0xff;
                tab[i++] = 0xff000000 | (r << 16) | (g << 8) | b;
            }
        }
        return tab;
    }

    private void readContents() {
        // read GIF file content blocks
        boolean done = false;
        while (!(done || err())) {
            int code = read();
            switch (code) {
            case 0x2C: // image separator
                readImage();
                break;
            case 0x21: // extension
                code = read();
                switch (code) {
                case 0xf9: // graphics control extension
                    readGraphicControlExt();
                    break;
                case 0xff: // application extension
                    readBlock();
                    String app = "";
                    for (int i = 0; i < 11; i++) {
                        app += (char) block[i];
                    }
                    if (app.equals("NETSCAPE2.0")) {
                        readNetscapeExt();
                    } else {
                        skip(); // don't care
                    }
                    break;
                default: // uninteresting extension
                    skip();
                }
                break;
            case 0x3b: // terminator
                done = true;
                break;
            case 0x00: // bad byte, but keep going and see what happens
                break;
            default:
                status = STATUS_FORMAT_ERROR;
            }
        }
    }

    private void readGraphicControlExt() {
        read(); // block size
        int packed = read(); // packed fields
        dispose = (packed & 0x1c) >> 2; // disposal method
        if (dispose == 0) {
            dispose = 1; // elect to keep old image if discretionary
        }
        transparency = (packed & 1) != 0;
        delay = readShort() * 10; // delay in milliseconds
        transIndex = read(); // transparent color index
        read(); // block terminator
    }

    private void readHeader() {
        String id = "";
        for (int i = 0; i < 6; i++) {
            id += (char) read();
        }
        if (!id.startsWith("GIF")) {
            status = STATUS_FORMAT_ERROR;
            return;
        }
        readLSD();
        if (gctFlag && !err()) {
            gct = readColorTable(gctSize);
            bgColor = gct[bgIndex];
        }
    }

    private void readImage() {
        ix = readShort(); // (sub)image position & size
        iy = readShort();
        iw = readShort();
        ih = readShort();
        int packed = read();
        lctFlag = (packed & 0x80) != 0; // 1 - local color table flag
        interlace = (packed & 0x40) != 0; // 2 - interlace flag
        // 3 - sort flag
        // 4-5 - reserved
        lctSize = 2 << (packed & 7); // 6-8 - local color table size
        if (lctFlag) {
            lct = readColorTable(lctSize); // read table
            act = lct; // make local table active
        } else {
            act = gct; // make global table active
            if (bgIndex == transIndex) {
                bgColor = 0;
            }
        }
        int save = 0;
        if (transparency) {
            save = act[transIndex];
            act[transIndex] = 0; // set transparent color if specified
        }
        if (act == null) {
            status = STATUS_FORMAT_ERROR; // no color table defined
        }
        if (err()) {
            return;
        }
        decodeImageData(); // decode pixel data
        skip();
        if (err()) {
            return;
        }
        frameCount++;
        // create new image to receive frame data
        image = Bitmap.createBitmap(width, height, Config.ARGB_4444);
        // createImage(width, height);
        setPixels(); // transfer pixel data to image
        if (gifFrame == null) {
            gifFrame = new GifFrame(image, delay);
            currentFrame = gifFrame;
        } else {
            GifFrame f = gifFrame;
            while (f.nextFrame != null) {
                f = f.nextFrame;
            }
            f.nextFrame = new GifFrame(image, delay);
        }
        // frames.addElement(new GifFrame(image, delay)); // add image to frame
        // list
        if (transparency) {
            act[transIndex] = save;
        }
        resetFrame();
        action.parseOk(true, frameCount);
    }

    private void readLSD() {
        // logical screen size
        width = readShort();
        height = readShort();
        // packed fields
        int packed = read();
        gctFlag = (packed & 0x80) != 0; // 1 : global color table flag
        // 2-4 : color resolution
        // 5 : gct sort flag
        gctSize = 2 << (packed & 7); // 6-8 : gct size
        bgIndex = read(); // background color index
        pixelAspect = read(); // pixel aspect ratio
    }

    private void readNetscapeExt() {
        do {
            readBlock();
            if (block[0] == 1) {
                // loop count sub-block
                int b1 = ((int) block[1]) & 0xff;
                int b2 = ((int) block[2]) & 0xff;
                loopCount = (b2 << 8) | b1;
            }
        } while ((blockSize > 0) && !err());
    }

    private int readShort() {
        // read 16-bit value, LSB first
        return read() | (read() << 8);
    }

    private void resetFrame() {
        lastDispose = dispose;
        lrx = ix;
        lry = iy;
        lrw = iw;
        lrh = ih;
        lastImage = image;
        lastBgColor = bgColor;
        dispose = 0;
        transparency = false;
        delay = 0;
        lct = null;
    }

    /**
     * Skips variable length blocks up to and including next zero length block.
     */
    private void skip() {
        do {
            readBlock();
        } while ((blockSize > 0) && !err());
    }
}

import java.io.InputStream;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;

/**
 * GifView<br>
 * 本类可以显示一个gif动画，其使用方法和android的其它view（如imageview)一样。<br>
 * 如果要显示的gif太大，会出现OOM的问题。
 */
public class GifView extends View implements GifAction {

    /** gif解码器 */
    private GifDecoder gifDecoder = null;
    /** 当前要画的帧的图 */
    private Bitmap currentImage = null;

    private boolean isRun = true;

    private boolean pause = false;

    private int showWidth = -1;
    private int showHeight = -1;
    private Rect rect = null;

    private DrawThread drawThread = null;

    private GifImageType animationType = GifImageType.SYNC_DECODER;

    /**
     * 解码过程中，Gif动画显示的方式<br>
     * 如果图片较大，那么解码过程会比较长，这个解码过程中，gif如何显示
     * 
     * @author liao
     *
     */
    public enum GifImageType {
        /**
         * 在解码过程中，不显示图片，直到解码全部成功后，再显示
         */
        WAIT_FINISH(0),
        /**
         * 和解码过程同步，解码进行到哪里，图片显示到哪里
         */
        SYNC_DECODER(1),
        /**
         * 在解码过程中，只显示第一帧图片
         */
        COVER(2);

        GifImageType(int i) {
            nativeInt = i;
        }

        final int nativeInt;
    }

    public GifView(Context context) {
        super(context);

    }

    public GifView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public GifView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

    }

    /**
     * 设置图片，并开始解码
     * 
     * @param gif
     *            要设置的图片
     */
    private void setGifDecoderImage(byte[] gif) {
        if (gifDecoder != null) {
            gifDecoder.free();
            gifDecoder = null;
        }
        gifDecoder = new GifDecoder(gif, this);
        gifDecoder.start();
    }

    /**
     * 设置图片，开始解码
     * 
     * @param is
     *            要设置的图片
     */
    private void setGifDecoderImage(InputStream is) {
        if (gifDecoder != null) {
            gifDecoder.free();
            gifDecoder = null;
        }
        gifDecoder = new GifDecoder(is, this);
        gifDecoder.start();
    }

    /**
     * 以字节数据形式设置gif图片
     * 
     * @param gif
     *            图片
     */
    public void setGifImage(byte[] gif) {
        setGifDecoderImage(gif);
    }

    /**
     * 以字节流形式设置gif图片
     * 
     * @param is
     *            图片
     */
    public void setGifImage(InputStream is) {
        setGifDecoderImage(is);
    }

    /**
     * 以资源形式设置gif图片
     * 
     * @param resId
     *            gif图片的资源ID
     */
    public void setGifImage(int resId) {
        Resources r = this.getResources();
        InputStream is = r.openRawResource(resId);
        setGifDecoderImage(is);
    }

    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (gifDecoder == null)
            return;
        if (currentImage == null) {
            currentImage = gifDecoder.getImage();
        }
        if (currentImage == null) {
            return;
        }
        int saveCount = canvas.getSaveCount();
        canvas.save();
        canvas.translate(getPaddingLeft(), getPaddingTop());
        if (showWidth == -1) {
            canvas.drawBitmap(currentImage, 0, 0, null);
        } else {
            canvas.drawBitmap(currentImage, null, rect, null);
        }
        canvas.restoreToCount(saveCount);
    }

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int pleft = getPaddingLeft();
        int pright = getPaddingRight();
        int ptop = getPaddingTop();
        int pbottom = getPaddingBottom();

        int widthSize;
        int heightSize;

        int w;
        int h;

        if (gifDecoder == null) {
            w = 1;
            h = 1;
        } else {
            w = gifDecoder.width;
            h = gifDecoder.height;
        }

        w += pleft + pright;
        h += ptop + pbottom;

        w = Math.max(w, getSuggestedMinimumWidth());
        h = Math.max(h, getSuggestedMinimumHeight());

        widthSize = resolveSize(w, widthMeasureSpec);
        heightSize = resolveSize(h, heightMeasureSpec);

        setMeasuredDimension(widthSize, heightSize);
    }

    /**
     * 只显示第一帧图片<br>
     * 调用本方法后，gif不会显示动画，只会显示gif的第一帧图
     */
    public void showCover() {
        if (gifDecoder == null)
            return;
        pause = true;
        currentImage = gifDecoder.getImage();
        invalidate();
    }

    /**
     * 继续显示动画<br>
     * 本方法在调用showCover后，会让动画继续显示，如果没有调用showCover方法，则没有任何效果
     */
    public void showAnimation() {
        if (pause) {
            pause = false;
        }
    }

    /**
     * 设置gif在解码过程中的显示方式<br>
     * <strong>本方法只能在setGifImage方法之前设置，否则设置无效</strong>
     * 
     * @param type
     *            显示方式
     */
    public void setGifImageType(GifImageType type) {
        if (gifDecoder == null)
            animationType = type;
    }

    /**
     * 设置要显示的图片的大小<br>
     * 当设置了图片大小 之后，会按照设置的大小来显示gif（按设置后的大小来进行拉伸或压缩）
     * 
     * @param width
     *            要显示的图片宽
     * @param height
     *            要显示的图片高
     */
    public void setShowDimension(int width, int height) {
        if (width > 0 && height > 0) {
            showWidth = width;
            showHeight = height;
            rect = new Rect();
            rect.left = 0;
            rect.top = 0;
            rect.right = width;
            rect.bottom = height;
        }
    }

    public void parseOk(boolean parseStatus, int frameIndex) {
        if (parseStatus) {
            if (gifDecoder != null) {
                switch (animationType) {
                case WAIT_FINISH:
                    if (frameIndex == -1) {
                        if (gifDecoder.getFrameCount() > 1) { // 当帧数大于1时，启动动画线程
                            DrawThread dt = new DrawThread();
                            dt.start();
                        } else {
                            reDraw();
                        }
                    }
                    break;
                case COVER:
                    if (frameIndex == 1) {
                        currentImage = gifDecoder.getImage();
                        reDraw();
                    } else if (frameIndex == -1) {
                        if (gifDecoder.getFrameCount() > 1) {
                            if (drawThread == null) {
                                drawThread = new DrawThread();
                                drawThread.start();
                            }
                        } else {
                            reDraw();
                        }
                    }
                    break;
                case SYNC_DECODER:
                    if (frameIndex == 1) {
                        currentImage = gifDecoder.getImage();
                        reDraw();
                    } else if (frameIndex == -1) {
                        reDraw();
                    } else {
                        if (drawThread == null) {
                            drawThread = new DrawThread();
                            drawThread.start();
                        }
                    }
                    break;
                }

            } else {
                Log.e("gif", "parse error");
            }

        }
    }

    private void reDraw() {
        if (redrawHandler != null) {
            Message msg = redrawHandler.obtainMessage();
            redrawHandler.sendMessage(msg);
        }
    }

    private Handler redrawHandler = new Handler() {
        public void handleMessage(Message msg) {
            invalidate();
        }
    };

    /**
     * 动画线程317      * @author liao319      */
    private class DrawThread extends Thread {
        public void run() {
            if (gifDecoder == null) {
                return;
            }
            while (isRun) {
                if (pause == false) {
                    // if(gifDecoder.parseOk()){
                    GifFrame frame = gifDecoder.next();
                    currentImage = frame.image;
                    long sp = frame.delay;
                    if (redrawHandler != null) {
                        Message msg = redrawHandler.obtainMessage();
                        redrawHandler.sendMessage(msg);
                        SystemClock.sleep(sp);
                    } else {
                        break;
                    }
                    // }else{
                    // currentImage = gifDecoder.getImage();
                    // break;
                    // }
                } else {
                    SystemClock.sleep(10);
                }
            }
        }
    }

}

   以上是Gif用到的所有类库。

   以下是该控件的使用方法。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <com.test.gifview.GifView
        android:id="@+id/gif1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:enabled="false"
        android:paddingRight="14px" />

    <TextView
        android:id="@+id/tsxt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:enabled="false"
        android:paddingRight="4px"
        android:text="click the Angel" />

    <com.test.gifview.GifView
        android:id="@+id/gif2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:enabled="false"
        android:paddingLeft="14px"
        android:paddingTop="4px" />

</LinearLayout>

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import com.test.gifview.GifView;
import com.test.gifview.GifView.GifImageType;

public class TestAction extends Activity implements OnClickListener {

    private GifView gf1;
    private GifView gf2;
    private boolean f = true;

    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        // Log.d("dddddddddd",Environment.getRootDirectory().getAbsolutePath());
        // LinearLayout ll = new LinearLayout(this);
        // LayoutParams la = new LayoutParams(LayoutParams.FILL_PARENT,
        // LayoutParams.FILL_PARENT);
        //
        // ll.setLayoutParams(la);
        // gf1 = new GifView(this);
        // gf2 = new GifView(this);
        //
        // gf1.setGifImage(R.drawable.gif1);
        // gf2.setGifImage(R.drawable.gif2);
        //
        // ll.addView(gf1);
        // ll.addView(gf2);
        //
        // setContentView(ll);

        setContentView(R.layout.gif);
        gf1 = (GifView) findViewById(R.id.gif1);
        // 设置Gif图片源
        gf1.setGifImage(R.drawable.big_mm);
        // 添加监听器
        gf1.setOnClickListener(this);

        gf2 = (GifView) findViewById(R.id.gif2);
        // 设置加载方式：先加载后显示、边加载边显示、只显示第一帧再显示
        gf2.setGifImageType(GifImageType.COVER);
        // 设置显示的大小，拉伸或者压缩
        gf2.setShowDimension(300, 300);
        // 设置Gif图片源
        gf2.setGifImage(R.drawable.a);
        // 添加监听器
        // gf2.setOnClickListener(this);
    }

    public void onClick(View v) {
        if (f) {
            // 点击停止动画
            gf1.showCover();
            f = false;
        } else {
            // 点击播放动画
            gf1.showAnimation();
            f = true;
        }
    }
}

 https://code.google.com/archive/p/gifview/downloads