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 event. I've tried and looked everything but doesn't seem to find a similar problem.

This is my Activity class :

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

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

    // Set up the drawer.
    navDrawerFragment = 
        (NavigationDrawerFragment) getSupportFragmentManager()
        .findFragmentById(R.id.navigation_drawer);
    navDrawerFragment.setUp(
        R.id.navigation_drawer, 
        (DrawerLayout) findViewById(R.id.drawer_layout), 
        toolbar);
}

And this is my NavigationDrawerFragment class :

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (savedInstanceState != null) {
        currentSelectedPosition = savedInstanceState.getInt(
            STATE_SELECTED_POSITION);
        fromSavedInstanceState = true;
    }

    // Select either the default item (0) or the last selected item.
    selectItem(currentSelectedPosition);
}

@Override
public void onActivityCreated (Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    // Indicate that this fragment would like 
    // to influence the set of actions in the action bar.
    setHasOptionsMenu(true);
}

public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        drawerListView = (ListView) inflater.inflate(
            R.layout.fragment_navigation_drawer, container, false);
        drawerListView.setOnItemClickListener(
            new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, 
                View view, int position, long id) {
                selectItem(position);
            }
        });
        //mDrawerListView.setAdapter();
        //mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
        return drawerListView;
}

public void setUp(int fragmentId, DrawerLayout drawerLayout, Toolbar toolbar) {
    fragmentContainerView = getActivity().findViewById(fragmentId);
    this.drawerLayout = drawerLayout;

    // set a custom shadow that overlays the main 
    // content when the drawer opens
    drawerLayout.setDrawerShadow(
        R.drawable.drawer_shadow, GravityCompat.START);
    // set up the drawer's list view 
    // with items and click listener

    ActionBar actionBar = getActionBar();
    actionBar.setDisplayHomeAsUpEnabled(true);
    actionBar.setHomeButtonEnabled(true);

    // ActionBarDrawerToggle ties together the the proper interactions
    // between the navigation drawer and the action bar app icon.
    drawerToggle = new ActionBarDrawerToggle(
        getActivity(), 
        drawerLayout, 
        toolbar, 
        R.string.navigation_drawer_open, 
        R.string.navigation_drawer_close) {
        public void onDrawerClosed(View view) {
            super.onDrawerClosed(view);
        }

        public void onDrawerOpened(View drawerView) {
            super.onDrawerOpened(drawerView);
        }
    };

    // If the user hasn't 'learned' about the drawer, 
    // open it to introduce them to the drawer,
    // per the navigation drawer design guidelines.
    if (!userLearnedDrawer && !fromSavedInstanceState) {
        drawerLayout.openDrawer(fragmentContainerView);
    }

    // Defer code dependent on restoration of previous instance state.
    drawerLayout.post(new Runnable() {
        @Override
        public void run() {
            drawerToggle.syncState();
        }
    });

    drawerLayout.setDrawerListener(drawerToggle);
}

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putInt(STATE_SELECTED_POSITION, currentSelectedPosition);
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // Forward the new configuration the drawer toggle component.
    drawerToggle.onConfigurationChanged(newConfig);
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    Log.d("cek", "item selected");
    if (drawerToggle.onOptionsItemSelected(item)) {
        Log.d("cek", "home selected");
        return true;
    }

    return super.onOptionsItemSelected(item);
}

when I clicked a menu item, the log "item selected" gets called. But when I click on the home button, it opens navigation drawer but the log "home selected" never get called. I've set onOptionsItemSelected method inside my Activity as well, but it still doesn't get called.

Answer 1

This is how I implemented it pre-material design and it seems to still work now I've switched to the new Toolbar. In my case I want to log the user in if they attempt to open the side nav while logged out, (and catch the event so the side nav won't open). In your case you could not return true;.

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    if (!isLoggedIn() && item.getItemId() == android.R.id.home) {
        login();
        return true;
    }
    return mDrawerToggle.onOptionsItemSelected(item) || super.onOptionsItemSelected(item);
}

Answer 2

This is how I do it to return to the right fragment otherwise if you have several fragments on the same level it would return to the first one if you don´t override the toolbar back button behavior.

toolbar.setNavigationOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            finish();
        }
    });

Answer 3

The easiest approach we could do is change the home icon to a known icon and compare drawables (because android.R.id.home icon can differ to different api versions

so set a toolbar as actionbar SetSupportActionBar(_toolbar);

_toolbar.NavigationIcon = your_known_drawable_here;

   for (int i = 0; i < _toolbar.ChildCount; i++)
            {
                View v = _toolbar.GetChildAt(i);
                if (v is ImageButton)
                {
                    ImageButton imageButton = v as ImageButton;

                    if (imageButton.Drawable.GetConstantState().Equals(_bookMarkIcon.GetConstantState()))
                    {
                       //here v is the widget that contains the home  icon you can add your click events here 
                    }
                }
            }

Answer 4

I changed the DrawerLayout a bit to get the events and be able to consume and event, such as if you want to use the actionToggle as back if you are in detail view:

public class ListenableDrawerLayout extends DrawerLayout {

    private OnToggleButtonClickedListener mOnToggleButtonClickedListener;
    private boolean mManualCall;

    public ListenableDrawerLayout(Context context) {
        super(context);
    }

    public ListenableDrawerLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ListenableDrawerLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    /**
     * Sets the listener for the toggle button
     *
     * @param mOnToggleButtonClickedListener
     */
    public void setOnToggleButtonClickedListener(OnToggleButtonClickedListener mOnToggleButtonClickedListener) {
        this.mOnToggleButtonClickedListener = mOnToggleButtonClickedListener;
    }

    /**
     * Opens the navigation drawer manually from code<br>
     * <b>NOTE: </b>Use this function instead of the normal openDrawer method
     *
     * @param drawerView
     */
    public void openDrawerManual(View drawerView) {
        mManualCall = true;
        openDrawer(drawerView);
    }

    /**
     * Closes the navigation drawer manually from code<br>
     * <b>NOTE: </b>Use this function instead of the normal closeDrawer method
     *
     * @param drawerView
     */
    public void closeDrawerManual(View drawerView) {
        mManualCall = true;
        closeDrawer(drawerView);
    }


    @Override
    public void openDrawer(View drawerView) {

        // Check for listener and for not manual open
        if (!mManualCall && mOnToggleButtonClickedListener != null) {

            // Notify the listener and behave on its reaction
            if (mOnToggleButtonClickedListener.toggleOpenDrawer()) {
                return;
            }

        }
        // Manual call done
        mManualCall = false;

        // Let the drawer layout to its stuff
        super.openDrawer(drawerView);
    }

    @Override
    public void closeDrawer(View drawerView) {

        // Check for listener and for not manual close
        if (!mManualCall && mOnToggleButtonClickedListener != null) {

            // Notify the listener and behave on its reaction
            if (mOnToggleButtonClickedListener.toggleCloseDrawer()) {
                return;
            }

        }
        // Manual call done
        mManualCall = false;

        // Let the drawer layout to its stuff
        super.closeDrawer(drawerView);
    }

    /**
     * Interface for toggle button callbacks
     */
    public static interface OnToggleButtonClickedListener {

        /**
         * The ActionBarDrawerToggle has been pressed in order to open the drawer
         *
         * @return true if we want to consume the event, false if we want the normal behaviour
         */
        public boolean toggleOpenDrawer();

        /**
         * The ActionBarDrawerToggle has been pressed in order to close the drawer
         *
         * @return true if we want to consume the event, false if we want the normal behaviour
         */
        public boolean toggleCloseDrawer();
    }

}

Answer 5

Try this code

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    if(id == android.R.id.home){
        //You can get 
    }
    return super.onOptionsItemSelected(item);
}

Add below code to your onCreate() metod

ActionBar ab = getSupportActionBar();
    ab.setDisplayHomeAsUpEnabled(true);