Android解码/展示/播放Gif图片动画

Android解码/显示/播放Gif图片动画

Android系统默认不支持Gif图片的播放，需要自定义工具类对Gif图片进行解码、显示和播放动画。至于怎么解码Gif图片，这里在别人的代码基础进行了修改：GifFrame、GifHelper等。


1、GifActivity循环播放类



package com.orgcent.gif;


import java.io.InputStream;


import android.app.Activity;

import android.os.Bundle;

import android.view.ViewGroup.LayoutParams;

import android.widget.ImageView;

import android.widget.TextView;

import android.widget.ImageView.ScaleType;


import com.orgcent.gif.GifHelper.GifFrame;


public class AndroidGifActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        TextView tv = new TextView(this);

        tv.setText("Android Gif Activity");

        setContentView(tv,new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));


        final ImageView iv = new ImageView(this);

        iv.setScaleType(ScaleType.CENTER);

        setContentView(iv, new LayoutParams(LayoutParams.FILL_PARENT,

                LayoutParams.FILL_PARENT));

        //对Gif图片进行解码

        final InputStream is = getResources().openRawResource(R.drawable.cell_orig);

        final GifFrame[] frames = CommonUtil.getGif(is);

        System.out.println("delay:" + frames[1].delay + ",size:" + frames.length);


        mGifTask = new PlayGifTask(iv, frames);

        mGifTask.start();

    }


    @Override

    protected void onDestroy() {

        super.onDestroy();

        if(null != mGifTask) mGifTask.stop();

    }


    private PlayGifTask mGifTask;

    //用来循环播放Gif每帧图片

    private static class PlayGifTask implements Runnable {

        int i = 0;

        ImageView iv;

        GifFrame[] frames;


        public PlayGifTask(ImageView iv, GifFrame[] frames) {

            this.iv = iv;

            this.frames = frames;

        }


        @Override

        public void run() {

            if (!frames[i].image.isRecycled()) {

                iv.setImageBitmap(frames[i].image);

            }

            iv.postDelayed(this, frames[i++].delay);

            i %= frames.length;

        }


        public void start() {

            iv.post(this);

        }


        public void stop() {

            if(null != iv) iv.removeCallbacks(this);

            iv = null;

            if(null != frames) {

                for(GifFrame frame : frames) {

                    if(frame.image != null && !frame.image.isRecycled()) {

                        frame.image.recycle();

                        frame.image = null;

                    }

                }

                frames = null;

            }

        }

    }

}

 

转载：Android解码/显示/播放Gif图片动画 | http://orgcent.com/android-decode-gif-play-animation/