MultiColorPickerView.java 文件源码

private int getColorFromBitmap(float x, float y) {
    if (paletteDrawable == null) return 0;

    Matrix invertMatrix = new Matrix();
    palette.getImageMatrix().invert(invertMatrix);

    float[] mappedPoints = new float[]{x, y};
    invertMatrix.mapPoints(mappedPoints);

    if (palette.getDrawable() != null && palette.getDrawable() instanceof BitmapDrawable &&
            mappedPoints[0] > 0 && mappedPoints[1] > 0 &&
            mappedPoints[0] < palette.getDrawable().getIntrinsicWidth() && mappedPoints[1] < palette.getDrawable().getIntrinsicHeight()) {

        invalidate();
        return ((BitmapDrawable) palette.getDrawable()).getBitmap().getPixel((int) mappedPoints[0], (int) mappedPoints[1]);
    }
    return 0;
}