How Can I Set back to last activity in react-native for android?

Question

How Can I Set back to last activity in react-native for android?

My thinking is:

1 set _navigate in index.android.js

// 设置回退的堆栈
var _navigator;
BackAndroid.addEventListener('hardwareBackPress', function() {
    if (_navigator && _navigator.getCurrentRoutes().length > 1) {
        _navigator.pop();
        return true;
    }
    return false;
});

2 pass navigator in RouteMapping:

RouteMapper: function(route, navigationOperations, onComponentRef) {
        _navigator = navigationOperations;
        if (route.name === 'detail') {
            // 问题详情页
            return (
                <DetailScreen
                  navigator={navigationOperations}
                  question={route.question} />
            );
        } else if (route.name == 'front') {
            // 首页
            return(
              <FrontScreen
                navigator={navigationOperations}
                />
            );

        }
    },

3 set push in list view

gotoDetail: function(question: Object) {
    this.props.navigator.push({
        id: question.question_id,
        name: 'detail',
        question: question
    })

But It not work. When I click back button in Android, it jump out the app?

How Can I do that?

Or Anyone can give some example?

Answer 1

You need to add the following code to <your project>/android/app/src/main/java/com/<your project>/MainActivity.java:

@Override
public void onBackPressed() {
    if (mReactInstanceManager != null) {
        mReactInstanceManager.onBackPressed();
    } else {
        super.onBackPressed();
    }
}

Projects created with React Native 0.12 will behave correctly.

For more infos see this issue on Github https://github.com/facebook/react-native/issues/3223.