Android hardware back button does not run onBack function

[ynsgnr]

Version

Tell us which versions you are using:

• react-native-router-flux v4.beta21 (v3 is not supported)
• react-native v0.48

When Android hardware back button pressed onBack function is not called. I dont know if its intentinal or not and can be solved by adding an event on BackHandler and returning true in function but i think that this should be mentioned in docs.

Thank you for your efforts, if you want i can add this into docs

[aksonov]

You are right, BackHandler should be used, feel free to submit PR for docs.

[CodeRabbitYu]

What is your solution? Can I provide the code?

[ynsgnr]

`componentDidMount(){
BackHandler.addEventListener('hardwareBackPress', this.handleAndroidBack)
}

componentWillUnmount(){
BackHandler.removeEventListener('hardwareBackPress', this.handleAndroidBack)
}

handleAndroidBack = () =>{
//Add desired function here (onBack in this case)
Actions.pop();
return true
}`