How to modify the length of the navigation bar indicator at the bottom of tablayout in Android

preface

I believe everyone is familiar with tablayout. It should be used frequently in development, but the length of the bottom navigation bar is fixed. You need to change the length yourself. You haven't found a way for a long time. After reading the official suggestion, you can modify the length you want through mapping. In fact, it's just a matter of a few lines of code.

Look at the code:

Leftdip and rightdip are left-right spacing, which can be set according to your own needs and called directly.

Many students have problems. The source code is attached here. You can see:

Fragment：

Layout:

summary

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