Android 控件界面转成Bitmap

方法一：

customView.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(customView.getDrawingCache());

方法二：

Bitmap bitmap = Bitmap.createBitmap(customView.getWidth(), customView.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
customView.draw(canvas);