Display Back Arrow on Toolbar

How to Display the Back Arrow on Toolbar

So, you're making the switch from the old and outdated ActionBar to the modern and sleek Toolbar in your application. Good choice! 👍 But you've encountered a little roadblock - how do you display and set a click event on the Back Arrow in the Toolbar? 🤔 Don't worry, I've got you covered! Let's dive into it.

The Problem at Hand

Here's a user query I stumbled upon in a tech forum:

I'm migrating from ActionBar to Toolbar in my application. But I don't know how to display and set a click event on the Back Arrow on Toolbar like I did on Actionbar. With ActionBar, I used to call mActionBar.setDisplayHomeAsUpEnabled(true). But there doesn't seem to be a similar method with Toolbar. Has anyone ever faced this situation and somehow found a way to solve it?

Finding a Solution

Lucky for you, there is indeed a way to display the Back Arrow on the Toolbar and handle the click event. And it's actually quite simple! Here's how you can do it:

1. Set the Toolbar as the Action Bar

   First things first, you need to set your Toolbar as the action bar for your activity or fragment. In your XML layout file, add the following code snippet:

   <androidx.appcompat.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" android:elevation="4dp" android:theme="@style/ThemeOverlay.AppCompat.ActionBar" />

2. Retrieve the Toolbar in Your Activity or Fragment

   In your activity or fragment code, retrieve the Toolbar using its ID and set it as the action bar. Add the following code snippet to your onCreate method:

   Toolbar toolbar = findViewById(R.id.toolbar); setSupportActionBar(toolbar);

3. Display the Back Arrow

   The magic happens here! To display the Back Arrow on the Toolbar, simply enable the home button by calling setDisplayHomeAsUpEnabled(true) on your Toolbar object. Add the following code snippet after setting the Toolbar as the action bar:

   getSupportActionBar().setDisplayHomeAsUpEnabled(true);

4. Handle the Click Event

   Lastly, you need to handle the click event when the Back Arrow is tapped. Override the onOptionsItemSelected method in your activity or fragment and add the necessary logic:

   @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { // Handle the click event here // For example, you might want to navigate back or perform some custom action return true; } return super.onOptionsItemSelected(item); }

Conclusion

And there you have it! 💥 You can now successfully display the Back Arrow on the Toolbar and handle its click event. Say goodbye to the old ActionBar and embrace the modern Toolbar with confidence.

I hope this guide was helpful to you and anyone else facing the same issue. If you have any questions or had a different approach to solving this problem, feel free to share your thoughts below. Let's make the tech community stronger together! 💪🌐