如何修复底部导航栏未正确显示

Question

I'm having the problem that when I trying to switch between the menu item. The menu item will not pointing to the correct icon. here is the flow when i found this problem

1. starting at the (Home)fragment,then press on the second menu item (Features )

case R.id.nav_home:
    //home fragment transaction
    actionBar.setTitle("Home");
    HomeFragment fragment1 = new HomeFragment();
    FragmentTransaction fragmentTransaction1 = getSupportFragmentManager().beginTransaction();
    fragmentTransaction1.replace(R.id.content, fragment1, "");
    fragmentTransaction1.commit();
    break;

2. second menu item (features) will go to features activity

case R.id.nav_features:
    //features fragment transaction
    startActivity(new Intent(DashboardActivity.this, FeaturesActivity.class));
    break;

3. close features activity and back to (Home) fragment

onBackPressed(); 

4. bottom navigation still pointing to second menu item (features).

how can I make the system point to the correct menu item?

Answer 1

You should return a boolean for this method:

 @Override
 public boolean onNavigationItemSelected(@NonNull MenuItem item) {

    //...
 }

do this:

 case R.id.nav_home:
      //home fragment transaction
      actionBar.setTitle("Home");
      HomeFragment fragment1 = new HomeFragment();
      FragmentTransaction fragmentTransaction1 = 
      getSupportFragmentManager().beginTransaction();
      fragmentTransaction1.replace(R.id.content, fragment1, "");
      fragmentTransaction1.commit();
      return true; // add this line and remove break;

if you don't want to select icon after click, you can return false .