CODEWITHSUNDEEP
androidandroid-support-libraryandroid-toolbarandroid-appcompat
Sudarshan Bhat
Sudarshan Bhat

Reputation: 3772

setTitle() behaves differently at different times

I'm extending AppCompatActivity and setting ActionBar using setSupportActionBar().

There's a bit of confusion in setting the title.

If I do - 

Toolbar toolbar = (Toolbar) findViewById(R.id.titlebar);
setSupportActionBar(toolbar);
toolbar.setTitle("Title 1"); // Does not work
setTitle("Title 2"); // Works
getSupportActionBar().setTitle("Title 3"); // Works
setTitle("Title 4"); // Does not work. Why?

What I see is that getSupportActionBar().setTitle() is creating a new view for the title and then the activity is losing the reference to it. Is this the intended behavior or a bug in Android?

Upvotes: 2

Views: 202

Answers (3)

bozorgzad.ai
bozorgzad.ai

Reputation: 524

copy this line

setSupportActionBar(toolbar);

add the end of your line.

Toolbar toolbar = (Toolbar) findViewById(R.id.titlebar);    
setSupportActionBar(toolbar);
toolbar.setTitle("Title 1");
setTitle("Title 2");
getSupportActionBar().setTitle("Title 3");
setTitle("Title 4");
setSupportActionBar(toolbar);

Upvotes: 1

VinayagaSundar
VinayagaSundar

Reputation: 1701

It's an intended behaviour once your set setSupportActionBar(Toolbar). support library internal creates new view for display title.

setTitle() is method of Activity it'll update only title if used setActionBar(Toolbar). But, it doesn't have backward compatability.

Ref

AppCompatDelegateImplBase

AppCompatDelegateImplV9

Upvotes: 0

karthik
karthik

Reputation: 357

If you call setSupportActionBar(Toolbar), then the Action Bar is then responsible for handling the title, therefore you need to call getSupportActionBar().setTitle("My Title"); to set a custom title.

Also check this link where toolbar.setTitle("My title"); may cause problem like below:- In android app Toolbar.setTitle method has no effect – application name is shown as title

And toolbar is the general form of action bar.

We can have multiple toolbars as layout widget but action is not.

Thus better approach is to use getSupportActionBar().setTitle("My Title");

Upvotes: 1

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