Android implements random verification code through custom view

Many Android entry program apes may be afraid of Android custom view, but this is the only way for experts to advance. They are ready to spend some time and write more articles on custom view.

1、 Problem description

Familiar with web development, children's shoes know that in order to prevent malicious cracking, malicious submission and ticket swiping, we will use the random verification code function when submitting form data. We also need this function in Android applications. How to implement it? Next, we will customize a random verification code view control to realize this requirement, and it is universal. When necessary, we can directly add this view component to the interface.

2、 Case introduction

Case operation effect

Components involved in the case

1. Checkview custom verification code control, which mainly overrides OnDraw method to realize graphics rendering

2. Config: used to configure the parameters of the verification code control, such as the number of points drawn, the number of dashes, and the setting of the background color

3. Checkutil: tool class related to verification code, which realizes functions such as random point coordinates, start and end point coordinates of random line segments, verification code verification, etc

4. Mainactivity: Test Application

3、 Function realization

1. Writing config components

3. Custom verification code control checkview

4. Write mainactivity test code

The above is for Android to realize the relevant knowledge of random verification code through custom view. I hope it will be helpful to you!