React NativeBackAndroid #
Detect hardware back button presses, and programmatically invoke the default back button -functionality to exit the app if there are no listeners or if none of the listeners return true.
Example:
BackAndroid.addEventListener('hardwareBackPress', function() {
+functionality to exit the app if there are no listeners or if none of the listeners return true.
+The event subscriptions are called in reverse order (i.e. last registered subscription first),
+and if one subscription returns true then subscriptions registered earlier will not be called.
Example:
BackAndroid.addEventListener('hardwareBackPress', function() {
// this.onMainScreen and this.goBack are just examples, you need to use your own implementation here
// Typically you would use the navigator here to go to the last state.