用Movie显示gif(1)SimpleGif

代码如下：

 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Movie;
 import android.os.Build;
 import android.util.AttributeSet;
 import android.view.View;

 import com.e.weixin.R;

 public class SimpleGif extends View {

     private Movie movie;        //播放动画的类
     private long firstFrame;    //第1帧的时间

     public int gifId;           //gif的res
     public int times;           //循环次数
     public int currentFrame;    //当前播放到第几帧
     public int duration;        //动画时长

     public SimpleGif(Context context, AttributeSet attrs) {
         super(context, attrs);
         boolean b = isHardwareAccelerated();
         //在有的版本上要关闭硬件加速才显示动画，
         //也可以在manifest.xml的application,activity等元素下用android:hardwareAccelerated="false" 关闭硬件加速。
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
             setLayerType(View.LAYER_TYPE_SOFTWARE, null);
         }
         b = isHardwareAccelerated();
         gifId = R.raw.tsj01;
         //构造一个movie
         movie = Movie.decodeStream(getResources().openRawResource(gifId));
         duration = movie.duration();//动画的总共时长
         if (duration == ) { //设置一个默认时间
             duration = ;
         }
         times = ;
     }

     public void onDraw(Canvas canvas) {

         //绘制第1步，取得当前时间
         long now = android.os.SystemClock.uptimeMillis();

         //记录第1帧的时间
         if (firstFrame == ) {// first time
             firstFrame = now;
         }

         if (movie != null) {
             //如果循环次数不为0就断续绘制。
             if (times > ) {
                 //计算当前帧的时间
                 currentFrame = (int) (now - firstFrame);
                 //如果当前帧大于时长，就说明是新循环开始
                 if (currentFrame > duration){
                     --times;//循环次数减1
                     firstFrame = now;
                     //计算在动画时长内的帧。
                     currentFrame %= duration;
                     System.out.println(" 倒数第  " + times + " 次");
                 }
                 //设置当前绘制的帧
                 movie.setTime(currentFrame);

                 //开始绘制动画的当前帧
                 movie.draw(canvas, , );

                 //刷新，绘制下1帧
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                     postInvalidateOnAnimation();
                 } else {
                     invalidate();
                 }
             }else{
                 movie.setTime();//设置绘制第0帧
                 movie.draw(canvas, , );//绘制
             }
         }
     }

 }