如何找到具体的像素颜色协调的图像？ [英] How to find pixels color in particular coordinate in images?

问题描述

我有一个活动，我的活动包含一个ImageView.I已经实现了OnTouchListener我ImageView.Here找到想要的颜色的像素在那里我在image.Please碰让我知道如何找到color.I有一个想法像素，

I have one activity, my activity contains one ImageView.I have implemented OnTouchListener for ImageView.Here I want find pixels color where i touch in image.Please let me know how to find pixels color.I have one ideas,

- >在那里的ImageView我摸到只要找到X和Y坐标，找到相同的X和Y坐标的像素，找到像素color.Please让我有没有可能

-->In ImageView where i touch just find X and Y coordinate and find pixels in same X and Y coordinate and find pixels color.Please let me is it possible.

请给予任何建议或文档做到这一点吧。

Please give any suggestion or document for to do this please.

与乌尔参考我写code位图，

with ur reference i wrote code for bitmap,

int mId=R.drawable.with_colors;
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), mId);
bitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true);  

在onTouch

int x=(int) event.getX();
int y=(int) event.getY();
int color=bitmap.getPixel(x, y);
Log.d("colors","---"+color);

但在这里登录打印颜色--- 0。

But here Log printing "Colors---0".

推荐答案

您可以使用的 getDrawable（） 上的ImageView得到什么绘制，然后通过强制转换为<$得到位图的方法C $ C> BitmapDrawable 并调用的 getBitmap（） ：

You can use the getDrawable() method of the imageview to get what is drawn, and then get the bitmap from that by casting to BitmapDrawable and calling getBitmap():

Drawable d = imageView.getDrawable();
Bitmap bitmap = ((BitmapDrawable) d).getBitmap();
int color = bitmap.getPixel(x, y);

要获得坐标，分配 OnTouchListener ：

To get the coordinates, assign an OnTouchListener:

imageview.setOnTouchListener(new OnTouchListener(){
    @Override
    public boolean onTouch(View v, MotionEvent event){
        switch(event.getAction()){
        case MotionEvent.ACTION_UP:
            int x = (int) event.getX();
            int y = (int) event.getY();

            //TODO: get pixel at x, y

            break;
        default:
            return false;
        }
    return true;
    }
});

在code以上就可以基本上只是将第一张code它说：在x拿到像素，Y来获得像素的颜色。

In the code above you can basically just insert the first code where it says "get pixel at x, y" to get the pixel color.

这篇关于如何找到具体的像素颜色协调的图像？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！