What is the ID of the back arrow drawable in the ActionBar?

Question

The following code causes a back arrow to appear in the ActionBar:

getSupportActionBar().setDisplayShowHomeEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);

I'm looking for the resource ID of the arrow drawable, i.e. android.R.drawable.xxx. The reason I need this ID is so that I can manually set an identical arrow (size & colour) elsewhere in my app.

I tried making my own drawable and using that but the size was different from the one in the ActionBar.

score 56 · Answer 1 · answered Jan 19 '18 at 19:43

56

If you have the support library in your project, you can make a back button in any place in your applicaction like this:

<ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="?attr/homeAsUpIndicator"
        android:background="?attr/selectableItemBackgroundBorderless"/>

Specifically the resource for the back arrow is ?attr/homeAsUpIndicator.

answered Jan 19 '18 at 19:43

VorteXavier

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10

How can I get the same ID programmatically? – Vadim Kotov Jun 27 '19 at 15:14
@VadimKotov I've added my answer for how to get the same id programmatically. – Eren Utku Feb 23 '21 at 12:52

score 17 · Answer 2 · answered Feb 23 '21 at 12:51

If you need to use the default back arrow of Android SDK and also with AndroidX then you can reach it with the following

androidx.appcompat.R.drawable.abc_ic_ab_back_material

Additionally, if you are planning to use it for a custom toolbar then you can set it like this

toolbar.setNavigationIcon(androidx.appcompat.R.drawable.abc_ic_ab_back_material)

And if you need to set click listener

toolbar.setNavigationOnClickListener { doSomething() }

score 3 · Answer 3 · answered Apr 21 '20 at 09:34

3

You can easily create a back arrow using Android asset studio.

Click on res folder and then right click on drawable -> New -> Vector Asset

answered Apr 21 '20 at 09:34

enadun

3,107
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Shihab Uddin · Answer 4 · 2019-07-15T13:43:12.273

2

The id of the back button in Toolbar is

android.R.id.home

You can take action from onOptionsItemSelected Method on Activity.

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (item.getItemId() == android.R.id.home) {
        //Do your task here.
        return true;
    }
    return super.onOptionsItemSelected(item);
}

edited Jul 15 '19 at 13:43

answered Jul 15 '19 at 12:02

Shihab Uddin

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What is the ID of the back arrow drawable in the ActionBar?

4 Answers4

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