android 把图变成灰色
16lz
2021-12-19
public static final Bitmap grey(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Bitmap faceIconGreyBitmap = Bitmap
.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(faceIconGreyBitmap);
Paint paint = new Paint();
ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.setSaturation(0);
ColorMatrixColorFilter colorMatrixFilter = new ColorMatrixColorFilter(
colorMatrix);
paint.setColorFilter(colorMatrixFilter);
canvas.drawBitmap(bitmap, 0, 0, paint);
return faceIconGreyBitmap;
}
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Bitmap faceIconGreyBitmap = Bitmap
.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(faceIconGreyBitmap);
Paint paint = new Paint();
ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.setSaturation(0);
ColorMatrixColorFilter colorMatrixFilter = new ColorMatrixColorFilter(
colorMatrix);
paint.setColorFilter(colorMatrixFilter);
canvas.drawBitmap(bitmap, 0, 0, paint);
return faceIconGreyBitmap;
}
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