Canvas清屏的实现
/** * Canvas清屏的操作 * * 參考资料: http://blog.csdn.net/lfdfhl/article/details/9076001 * */ private void cleanCanvas() { mCanvas = mSurfaceHolder.lockCanvas(); if (mCanvas != null) { Paint paint = new Paint(); // 下面三行为清屏的核心代码 paint.setXfermode(new PorterDuffXfermode(Mode.CLEAR)); mCanvas.drawPaint(paint); paint.setXfermode(new PorterDuffXfermode(Mode.SRC)); // 以上三行为清屏的核心代码 // 在清屏后再运行drawXXX()操作,比方: mCanvas.drawBitmap(mBitmap, lastX, 40, mPaint); } }