用Movie显示gif(1)SimpleGif
代码如下：
1 import android.content.Context; 2 import android.graphics.Canvas; 3 import android.graphics.Movie; 4 import android.os.Build; 5 import android.util.AttributeSet; 6 import android.view.View; 7 8 import com.e.weixin.R; 9 10 public class SimpleGif extends View { 11 12 private Movie movie; //播放动画的类 13 private long firstFrame; //第1帧的时间 14 15 public int gifId; //gif的res 16 public int times; //循环次数 17 public int currentFrame; //当前播放到第几帧 18 public int duration; //动画时长 19 20 21 public SimpleGif(Context context, AttributeSet attrs) { 22 super(context, attrs); 23 boolean b = isHardwareAccelerated(); 24 //在有的版本上要关闭硬件加速才显示动画， 25 //也可以在manifest.xml的application,activity等元素下用android:hardwareAccelerated="false" 关闭硬件加速。 26 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { 27 setLayerType(View.LAYER_TYPE_SOFTWARE, null); 28 } 29 b = isHardwareAccelerated(); 30 gifId = R.raw.tsj01; 31 //构造一个movie 32 movie = Movie.decodeStream(getResources().openRawResource(gifId)); 33 duration = movie.duration();//动画的总共时长 34 if (duration == 0) { //设置一个默认时间 35 duration = 1000; 36 } 37 times = 1; 38 } 39 40 public void onDraw(Canvas canvas) { 41 42 //绘制第1步，取得当前时间 43 long now = android.os.SystemClock.uptimeMillis(); 44 45 //记录第1帧的时间 46 if (firstFrame == 0) {// first time 47 firstFrame = now; 48 } 49 50 if (movie != null) { 51 //如果循环次数不为0就断续绘制。 52 if (times > 0) { 53 //计算当前帧的时间 54 currentFrame = (int) (now - firstFrame); 55 //如果当前帧大于时长，就说明是新循环开始 56 if (currentFrame > duration){ 57 --times;//循环次数减1 58 firstFrame = now; 59 //计算在动画时长内的帧。 60 currentFrame %= duration; 61 System.out.println(" 倒数第 " + times + " 次"); 62 } 63 //设置当前绘制的帧 64 movie.setTime(currentFrame); 65 66 //开始绘制动画的当前帧 67 movie.draw(canvas, 0, 0); 68 69 //刷新，绘制下1帧 70 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { 71 postInvalidateOnAnimation(); 72 } else { 73 invalidate(); 74 } 75 }else{ 76 movie.setTime(0);//设置绘制第0帧 77 movie.draw(canvas, 0, 0);//绘制 78 } 79 } 80 } 81 82 }
