android 播放网络或本地gif格式的动态图片

主要代码都在这个自定义的View类里,此代码是参考了apidemos里BitmapDecode.java:

注意的地方已用红色的标注了.

我试过的android版本:4.0.4, 4.11, 4.12

package com.hzg.cpTest;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Movie;

import android.graphics.Paint;

import android.os.Handler;

import android.os.Message;

import android.util.AttributeSet;

import android.util.Log;

import android.view.View;

public class GifView extends View

{
private static final String TAG = GifView.class.getSimpleName();
private Movie mMovie;
//private Bitmap mBmp;
private long mPlayMovieTime;
private static final String DOWNLOAD_ADDR = "http://img3.3lian.com/2006/013/08/20051105155416881.gif";
private Context context;
public GifView(Context context)
{
super(context);
this.context = context;
//readGifFormNative();//播放本地的gif格式图片
readGifFormNet();//播放网络的gif格式图片
}

public GifView(Context context, AttributeSet attrs)
{
super(context, attrs);
readGifFormNet();
//setFocusable(true);
//readGifFormNative();
}

private void readGifFormNative()
{
InputStream in;
in = context.getResources().openRawResource(
R.drawable.gif_pic);
mMovie = Movie.decodeStream(in);
}

private void readGifFormNet()
{
new Thread(new Runnable()
{

@Override
public void run()
{
httpTest();
mHandler.sendEmptyMessage(0);
}
}).start();
}

Handler mHandler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
switch (msg.what)
{
case 0:
invalidate();
break;

default:
break;
}
super.handleMessage(msg);
}
};

private void httpTest()
{
try
{
URL url = new URL(DOWNLOAD_ADDR);
HttpURLConnection connection = (HttpURLConnection) url
.openConnection();
// connection.setRequestMethod("GET");
int size = connection.getContentLength();
Log.e(TAG, "size = " + size);
InputStream in = connection.getInputStream();
byte[] array = streamToBytes(in);
mMovie = Movie.decodeByteArray(array, 0, array.length);
//mMovie = Movie.decodeStream(in);
// mBmp = BitmapFactory.decodeStream(in);
in.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}

    private static byte[] streamToBytes(InputStream is) {

        ByteArrayOutputStream os = new ByteArrayOutputStream(1024);

        byte[] buffer = new byte[1024];

        int len;

        try {

            while ((len = is.read(buffer)) >= 0) {

                os.write(buffer, 0, len);

            }

        } catch (java.io.IOException e) {

        }

        return os.toByteArray();

    }

    
@Override
protected void onDraw(Canvas canvas)
{
Paint p = new Paint(); 
p.setAntiAlias(true); 
setLayerType(LAYER_TYPE_SOFTWARE, p);

        if (mMovie != null) {

       

            long now = android.os.SystemClock.uptimeMillis();

            if (mPlayMovieTime == 0) {   // first time

            mPlayMovieTime = now;

            }

            int dur = mMovie.duration();

            if (dur == 0) {

                dur = 1000;

            }

            int relTime = (int)((now - mPlayMovieTime) % dur);

            mMovie.setTime(relTime);

            mMovie.draw(canvas, getWidth() - mMovie.width(),

                        getHeight() - mMovie.height());

            invalidate();

        }
}

}