getsupportactionbar activity

In an Android app, you can use the getSupportActionBar() method of the AppCompatActivity class to get the ActionBar object for the activity. The ActionBar is a toolbar at the top of the activity that can contain a title, navigation buttons, and other action items.

Here's an example of how you could use the getSupportActionBar() method to get the ActionBar object in an AppCompatActivity:

import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;

public class MyActivity extends AppCompatActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my);

    ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
      // use the action bar
      actionBar.setTitle("My Activity");
      actionBar.setDisplayHomeAsUpEnabled(true);
    }
  }
}

In this example, the getSupportActionBar() method is used to get the ActionBar object for the activity. If the ActionBar object is not null, the setTitle() and setDisplayHomeAsUpEnabled() methods are used to set the title and enable the home button in the action bar, respectively.

Note that the AppCompatActivity class is a subclass of the Activity class that provides support for the action bar on devices running Android 2.1 (API level 7) and higher.