ImageView implementation of Android colorpikcer selector example code

This article introduces the sample code of ImageView implementing Android colorpikcer selector, which is shared with you as follows:

Android colorpikcer selector

The main idea of circular colorpicker is:

Get bitmap

Initialize bitmap in colorpickerview constructor. Because getbackground has a variety of drawable, and the way to obtain bitmap is not necessary,

Override ontouch

Get the color of the corresponding point of the bitmap according to the left side of the touch event.

Note that if the width and height parameters of the view are wrap_ Content, the clicked point of motionevent must be within the coordinates of bitmap. But if it's not wrap_ Content, coordinate conversion is required, and click point conversion is performed using matrix.

Complete code:

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