Android 双缓冲技术

    为了有效控制闪屏现象，可以使用双缓冲来加载资源显示。        /**         * 双缓冲技术实例         * @author b         *         */        public class Surfaceview extends View implements Runnable{                    //要绘制的图片            private Bitmap mBitmap;            private Paint paint;            //内存一块缓冲区            private Bitmap sBitmap;            private Canvas canvas;            public Surfaceview(Context context) {                super(context);                //加载图片到内存                mBitmap = ((BitmapDrawable)getResources().getDrawable(R.drawable.b122)).getBitmap();                //创建指定大小的缓冲区域                sBitmap = Bitmap.createBitmap(1000, 800, Bitmap.Config.ARGB_8888);                canvas = new Canvas();                //                canvas.setBitmap(sBitmap);                paint = new Paint();                //把图片绘制在缓冲区域上                canvas.drawBitmap(mBitmap, 0, 0, paint);                new Thread(this).start();            }                    @Override            protected void onDraw(Canvas canvas) {                super.onDraw(canvas);                //将缓冲区域的图片显示出来                canvas.drawBitmap(sBitmap, 0, 0, paint);            }            @Override            public void run() {                while(!Thread.currentThread().isInterrupted()){                    try {                        Thread.sleep(100);                    } catch (Exception e) {                        Thread.interrupted();                    }                    postInvalidate();                }            }                }