如何使屏幕在所有应用程序中仅显示android中的白色和黑色 [英] how to make screen only display white and black color in android for all app

问题描述

我想使应用看起来像超省电模式（galaxy s5）。它更改屏幕仅显示黑白颜色。我不知道该怎么做
有人可以提供一些建议或信息吗？
非常感谢。

I want to make app look like Ultra Power Saving Mode (galaxy s5). it change screen only display black and white color. I don't know how to make it. Can anyone give some advice or information about how to do this? Thanks a lot.

推荐答案

// Create a paint object with 0 saturation (black and white)
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0);
Paint greyscalePaint = new Paint();
greyscalePaint.setColorFilter(new ColorMatrixColorFilter(cm));
// Create a hardware layer with the greyscale paint
v.setLayerType(LAYER_TYPE_HARDWARE, greyscalePaint);

使用这些代码作为根布局。

use these code to the root layout.

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