import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Movie;
import android.util.AttributeSet;
import android.view.View;
public class MyGifView extends View{
private long movieStart;
private Movie movie;
//此处必须重写该构造方法
public MyGifView(Context context,AttributeSet attributeSet) {
super(context,attributeSet);
//以文件流(InputStream)读取进gif图片资源
movie=Movie.decodeStream(getResources().openRawResource(R.drawable.keyboard));
}
@Override
protected void onDraw(Canvas canvas) {
long curTime=android.os.SystemClock.uptimeMillis();
//第一次播放
if (movieStart == 0) {
movieStart = curTime;
}
if (movie != null) {
int duraction = movie.duration();
int relTime = (int) ((curTime-movieStart)%duraction);
movie.setTime(relTime);
movie.draw(canvas, 0, 0);
//强制重绘
invalidate();
}
super.onDraw(canvas);
}
} |