Android的 - 在钮扣setBackgroundResource [英] Android - setBackgroundResource on Button

问题描述

我有一些按钮，我设置背景与 setBackgroundResource（R.drawable.cal_box_center）; ，我遇到的问题是，我的背景是一个渐变哪些有这个频带效应（讨厌），我读过，为了消除这一点，你就需要设置Bitmap.Config.ARGB_8888。我看着API，并做到这一点的方法是使用德codeStream等，但我怎么可以使用setBackgroundResource，仍然设置为配置ARGB_8888？

I have some buttons which i set the background with setBackgroundResource(R.drawable.cal_box_center); and the problem I'm having is that my background is a gradient which has this banding effect (annoying) and I've read that in order to remove this you'll need to set the Bitmap.Config.ARGB_8888. I looked into the API and the way to do this is to use decodeStream etc, but how can i use setBackgroundResource and still set the Config to ARGB_8888?

先谢谢了。

推荐答案

您可以使用此code片断：

You can use this code snippet:

// create button
Button btn = new Button(getApplicationContext());

//decode the resource(You can also use decodeStream and other decode method of
//BitmapFactory)
Bitmap btm = BitmapFactory.decodeResource(getResources(), R.drawable.cal_box_center);

//create another copy of your bitmap and specify Config
Bitmap newBtm = btm.copy(Bitmap.Config.ARGB_8888, true);

//use your newBtm to create a BitmapDrawable
BitmapDrawable btmDrwble = new BitmapDrawable(newBtm);

// finally set the drawable as your button's background
btn.setBackgroundDrawable(btmDrwble);

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感谢。

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