Android custom progress bar gradient view instance code

Recently, in the company, the project was not very busy. I occasionally saw a brother asking for help at CSDN and asked for a custom gradient progress bar. At that time, I looked at the progress bar and felt it was very beautiful. I tried to customize the view and realized one. Don't talk nonsense, let's go to the figure above first!

This custom view is completely separated from the progressview provided by Android, and does not use a picture, which can better reduce the coupling of program code!

Now I post the code to explain the implementation idea!

For others, there are no technical difficulties. To make this kind of custom control, the most important thing is to understand the implementation ideas according to other people's renderings. The specific code resume is in the ideas, otherwise it will only be on paper! If you don't understand, you should draw more pictures and calculate them step by step. You can "practice" for a long time!

Here is a demo download address: http://xiazai.jb51.net/201401/yuanma/SpringProgressDemo (jb51.net).zip