Clicking hamburger icon on Toolbar does not open Navigation Drawer

Question

I have a simple android.support.v7.widget.Toolbar and all I am trying to do is to open a NavigationDrawer by pressing the \"hamburger\" icon in the top left cor

Answer 1

You need to sync the drawer toggle:

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    mDrawerToggle.syncState();
}

EDIT: That code is working for me (copied from your post)

public class TempActivity extends AppCompatActivity {
    private ActionBarDrawerToggle mDrawerToggle;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.temp);
        setupDrawer();
    }
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        mDrawerToggle.onConfigurationChanged(newConfig);
    }
    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }
    private void setupDrawer() {
        Toolbar toolbar = (Toolbar) findViewById(R.id.my_toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);
        DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.my_drawer_layout);
        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,toolbar,R.string.drawer_open, R.string.drawer_close) {
            public void onDrawerClosed(View view) {
                super.onDrawerClosed(view);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
        };
        mDrawerLayout.setDrawerListener(mDrawerToggle);
    }
}


    
        
        
    
    
        
    

But if you are using the new NavigationView, then you don't need the toggle etc. Here is a good example how to use it.