Android custom control in-depth study of random verification code generated by Android
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Android
In the previous article, the properties of custom controls were introduced. For details, see "explain Android custom control properties typedarray and attrs". Then on this basis, the random verification code generation is realized. The code inside is custom controls and involves custom view painting. 1. First look at the effect diagram of the implementation
It's OK to see this effect picture. Then look at the source code. 2. Attr file
3. Layout
4. Custom authcodeview.class inherits view and overrides
OnDraw (canvas) method. Look at the code, there are detailed comments.
Source code download: Android generates random verification code demo
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