getDecorView非一般绘制

getDecorView特殊绘制Bitmap bm Bitmap.create...?Canvas canvas new Canvas(bm)?getWindow.getDecor

getDecorView特殊绘制

Bitmap bm = Bitmap.create...?
Canvas canvas = new Canvas(bm);?
getWindow.getDecorView().draw(canvas);?

以上代码是看过来的 但是没有实际调出绘制屏幕的效果