Cannot catch toolbar home button click event

Question

I\'ve implemented the newest appcompat library and using the Toolbar as action bar. But the problem is I cannot catch the home button / hamburger icon click eve

Answer 1

I have handled back and Home button in Navigation Drawer like

public class HomeActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {
    private ActionBarDrawerToggle drawerToggle;
    private DrawerLayout drawerLayout;
    NavigationView navigationView;
    private Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_home);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        resetActionBar();

        navigationView = (NavigationView) findViewById(R.id.navigation_view);
        navigationView.setNavigationItemSelectedListener(this);

        //showing first fragment on Start
        getSupportFragmentManager().beginTransaction().setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN).replace(R.id.content_fragment, new FirstFragment()).commit();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        //listener for home
        if(id==android.R.id.home)
        {  
            if (getSupportFragmentManager().getBackStackEntryCount() > 0)
                onBackPressed();
            else
                drawerLayout.openDrawer(navigationView);
            return  true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onBackPressed() {
       if (drawerLayout.isDrawerOpen(GravityCompat.START)) 
            drawerLayout.closeDrawer(GravityCompat.START);
       else 
            super.onBackPressed();
    }

    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Begin the transaction

        Fragment fragment = null;
        // Handle navigation view item clicks here.
        int id = item.getItemId();
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (id == R.id.nav_companies_list) {
            fragment = new FirstFragment();
            // Handle the action
        } 


        // Begin the transaction
        if(fragment!=null){

            if(item.isChecked()){
                if(getSupportFragmentManager().getBackStackEntryCount()==0){
                    drawer.closeDrawers();
            }else{
                    removeAllFragments();
                    getSupportFragmentManager().beginTransaction().setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE).replace(R.id.WikiCompany, fragment).commit();
                    drawer.closeDrawer(GravityCompat.START);
                }

            }else{
                removeAllFragments();
                getSupportFragmentManager().beginTransaction().setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE).replace(R.id.WikiCompany, fragment).commit();
                drawer.closeDrawer(GravityCompat.START);
            }
        }

        return true;
    }

    public void removeAllFragments(){
        getSupportFragmentManager().popBackStackImmediate(null,
                FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }

    public void replaceFragment(final Fragment fragment) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction().setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
                .replace(R.id.WikiCompany, fragment).addToBackStack("")
                .commit();
    }


    public void updateDrawerIcon() {
        final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                try {
                    Log.i("", "BackStackCount: " + getSupportFragmentManager().getBackStackEntryCount());
                    if (getSupportFragmentManager().getBackStackEntryCount() > 0)
                        drawerToggle.setDrawerIndicatorEnabled(false);
                    else
                        drawerToggle.setDrawerIndicatorEnabled(true);
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        }, 50);
    }

    public void resetActionBar()
    {
        //display home
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
    }

    public void setActionBarTitle(String title) {
        getSupportActionBar().setTitle(title);
    }
}

and In each onViewCreated I call

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    ((HomeActivity)getActivity()).updateDrawerIcon();
    ((HomeActivity) getActivity()).setActionBarTitle("List");
}