Display Back Arrow on Toolbar

Question

I'm migrating from ActionBar to Toolbar in my application. But I don't know how to display and set click event on Back Arrow on Toolbar like I did on Actionbar.

With ActionBar, I call mActionbar.setDisplayHomeAsUpEnabled(true). But there is no the similar method like this.

Has anyone ever faced this situation and somehow found a way to solve it?

Answer 1

If you don't want to create a custom Toolbar, you can do like this

public class GalleryActivity extends AppCompatActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        ...  
        getSupportActionBar().setTitle("Select Image");
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
        }
return super.onOptionsItemSelected(item);
    }
}

In you AndroidManifest.xml

<activity
    android:name=".GalleryActivity"
    android:theme="@style/Theme.AppCompat.Light"
    >        
</activity>

you can also put this android:theme="@style/Theme.AppCompat.Light" to <aplication> tag, for apply to all activities

Answer 2

I see a lot of answers but here is mine which is not mentioned before. It works from API 8+.

public class DetailActivity extends AppCompatActivity

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_detail);

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

    // add back arrow to toolbar
    if (getSupportActionBar() != null){
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // handle arrow click here
    if (item.getItemId() == android.R.id.home) {
        finish(); // close this activity and return to preview activity (if there is any)
    }

    return super.onOptionsItemSelected(item);
}

Answer 3

In the AppCompatActivity for example you can do

public class GrandStatActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_grand_stat);
    }

    @Override
    public void onResume() {
        super.onResume();

        // Display custom title
        ActionBar actionBar = this.getSupportActionBar();
        actionBar.setTitle(R.string.fragment_title_grandstats);

        // Display the back arrow
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }

    // Back arrow click event to go to the parent Activity
    @Override
    public boolean onSupportNavigateUp() {
        onBackPressed();
        return true;
    }

}

Answer 4

Simple and easy way to show back button on toolbar

Paste this code in onCreate method

 if (getSupportActionBar() != null){

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

Paste this override method outside the onCreate method

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if(item.getItemId()== android.R.id.home) {

        finish();
    }
    return super.onOptionsItemSelected(item);
}

Answer 5

MyActivity extends AppCompatActivity {

    private Toolbar toolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        ...
        toolbar = (Toolbar) findViewById(R.id.my_toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        toolbar.setNavigationOnClickListener(arrow -> onBackPressed());
    }

Answer 6

In Kotlin it would be

private fun setupToolbar(){
    toolbar.title = getString(R.string.YOUR_TITLE)
    setSupportActionBar(toolbar)
    supportActionBar?.setDisplayHomeAsUpEnabled(true)
    supportActionBar?.setDisplayShowHomeEnabled(true)
}

// don't forget click listener for back button
override fun onSupportNavigateUp(): Boolean {
    onBackPressed()
    return true
}