将操作栏的标题从Fragmetn更改为Activity

Question

I have One MainActivity with Button A to navigate to Fragment A and initiall Title Set as "This is Main Title"

When I click Button A, Following Code gets Executed

   getSupportActionBar().setTitle("Profile");
            getSupportFragmentManager().beginTransaction().replace(R.id.container,new TrialProfile()).addToBackStack(null).commit();

and Now the Title Bar Text chnage to "Profile" But The Problem is When I press Back Button, The Title remains Same. I want it to change to Original One ie "This is Main Title"

Can you please help me with this?

Answer 1

在oncreate方法的当前活动中再次调用此方法

getSupportActionBar().setTitle("This is Main Title");

Answer 2

(getActivity()).setTitle("Profile");

Answer 3

To Change the title of Action Bar from Fragment to Activity

Create a method in activity like below:

public void setTitleActionBar(String title) {
        getSupportActionBar().setTitle(title);
    }

Now you can call the method in fragment and activity for changing the title:

In Fragment:

  ((HomeActvitiy) getActivity()).setTitleActionBar("Fragment title");

In Activity call the method before fragment replace like below:

 setTitleActionBar("My Profile");
        getSupportFragmentManager().beginTransaction()
                .replace(R.id.home_container, new MyProfileFragment())
                .commit();

I hope its work for you.