In react native, press the Android physical back key twice to exit the application

preface

This article mainly introduces the relevant contents of Android physical back key in react native, and pressing the return key twice will exit the application. It is shared for your reference and learning. I won't say much below. Let's take a look at the detailed introduction together.

Without much to say, go straight to the figure above:

Lines 16 to 22 set event listening and remove event listening

Lines 24 to 32 implement the onbackandroid method

The core part of the code is the two pieces of code mentioned in the appeal. The effect picture is sent below

Press the back button again within two seconds to return to the mobile desktop

summary

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