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 are using an ActionBarActivity then you can tell Android to use the Toolbar as the ActionBar like so:

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

And then calls to

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

will work. You can also use that in Fragments that are attached to ActionBarActivities you can use it like this:

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

If you are not using ActionBarActivities or if you want to get the back arrow on a Toolbar that's not set as your SupportActionBar then you can use the following:

mActionBar.setNavigationIcon(getResources().getDrawable(R.drawable.ic_action_back)); mActionBar.setNavigationOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {        //What to do on back clicked    } }); 

If you are using android.support.v7.widget.Toolbar, then you should add the following code to your AppCompatActivity:

@Override public boolean onSupportNavigateUp() {     onBackPressed();     return true; } 

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); }