ActionBar and ToolBar add instance code to return arrow in Android

Add return arrow

//OnCreate methodActionBar actionBar = ();
("Search Function");
(true);
// Methods in activity class@Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if(() == )
    {
      finish();
      return true;
    }
    return (item);
  }

Here, ActionBar introduces package: import .;

2. ToolBar adds return arrow

The code is as follows:

// in onCreate functionToolbar mToolbarTb = (Toolbar) findViewById();
setSupportActionBar(mToolbarTb);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// Methods in activity class//Add click to return arrow event@Override
public boolean onOptionsItemSelected(MenuItem item) {
  if(() == )
  {
    finish();
    return true;
  }
  return (item);
}

Summarize

The above is the example code for adding return arrows to ActionBar and ToolBar in Android introduced to you. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply to you in time. Thank you very much for your support for my website!