Android 页面置灰

java

Paint paint = new Paint();

ColorMatrix colorMatrix= new ColorMatrix();

colorMatrix.setSaturation(0);

paint.setColorFilter(new ColorMatrixColorFilter(colorMatrix));

getWindow().getDecorView().setLayerType(View.LAYER_TYPE_HARDWARE, paint);

kotlin

val paint = Paint()

val colorMatrix = ColorMatrix()

colorMatrix.setSaturation(0F)

paint.setColorFilter(ColorMatrixColorFilter(colorMatrix))

window.decorView.setLayerType(View.LAYER_TYPE_HARDWARE,paint)