Android custom view to realize circular rotating disc in QQ music

Circular rotating disc in QQ music

Idea analysis: 1. After measuring the width and height of the entire view in onmeasure, set the width and height. 2. After obtaining the picture resources of our res, draw a circular picture in the OnDraw method. 3. Start the rotation thread by sending runnable through the handler (this step can be removed if you only want to make a circular avatar). 4. Use our view in the layout

design sketch:

Post our variable information:

Step 1: after measuring the width and height of the whole view, set the width and height

Step 2: after obtaining the image resources of our res, draw a circular image in the OnDraw method

Step 3: start the rotation thread by sending runnable through the handler

Step 4: use our view in the layout

The following is the source code of the whole class

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