如何在android中的触摸事件上获取图像的点(或像素)颜色 [英] how to get color at the spot(or pixel) of a image on touch event in android

问题描述

我想获取我将在 Android 中触摸图像的点或像素的颜色.我在网上搜索了很多，但一无所获.请任何人帮助我.

I want to get the color of the spot or pixel where I will touch a image in Android. I searched a lot on net, but got nothing. Please anyone help me.

推荐答案

试试这个:

final Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
imageView.setOnTouchListener(new OnTouchListener(){
        @Override
        public boolean onTouch(View v, MotionEvent event){
        int x = (int)event.getX();
        int y = (int)event.getY();
        int pixel = bitmap.getPixel(x,y);

        //then do what you want with the pixel data, e.g
        int redValue = Color.red(pixel);
        int blueValue = Color.blue(pixel);
        int greenValue = Color.green(pixel);        
        return false;
        }
   });

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