title: Flutter - How to change the text in bottom navigation from child widget?
body: <p>I started Flutter recently and my app required bottom navigation. I have created bottom navigation and manage to access the child widget based on the tab selected. </p>
  
  <p>Under the child widget there is drop down selection where I can change the bottom navigation text in one of the tabs for different selections.</p>
  
  <p>I have tried a few days but still could not figure out how the child widget can change the text.</p>
  
  <p>I have tried callback but cannot get it work. I have tried navigation.push - material page route but it rebuild the whole widget and my selection gone. I have also tried to use GlobalKey or Sharedpreference to capture my selection so that when it rebuild, it will use back the stored selection but I couldn't get it work.</p>
  
  <p>I only wish to change the bottom navigation text in one of the text from child widget drop down selection. </p>
  
  <p>Which is the best method to achieve this?</p>