Navigation drawer hamburguer icon doesn't show until swipe drawer manually

Question

I did some searchs and tried a lot of solutions, but i'm going to the same problem:

The drawer hamburguer icon doesn't show until I swipe the drawer.

Here my code

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    ...
    setSupportActionBar(toolbar);
    setupDrawer();
    ...
}

//calling the method bellow inside onCreate
public void setupDrawer(){
    mDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close){
        public void onDrawerClosed(View view) {
            super.onDrawerClosed(view);
            syncState();
        }

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

    mDrawerToggle.setDrawerIndicatorEnabled(true);
    drawerLayout.setDrawerListener(mDrawerToggle);
    ActionBar actionBar =  getActionBar();

    if(actionBar != null) {
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setDisplayShowHomeEnabled(true);
        actionBar.setIcon(R.drawable.ic_launcher);
    }
}

I want it aways showing.

You should use `getSupportActionBar()` instead of `getActionBar()` (which probably returns `null`). — Marc Plano-Lesay, Dec 15 '15 at 18:32
@Kernald yes it works, now show the icon, and probably will not cause nullpointer exception. — diogojme, Dec 15 '15 at 18:37

score 3 · Accepted Answer · answered Dec 15 '15 at 18:33

Try to get action bar by getSupportActionBar() method, not getActionBar(). Inside your setupDrawer() method:

mDrawerToggle.setDrawerIndicatorEnabled(true);
drawerLayout.setDrawerListener(mDrawerToggle);
// here
//ActionBar actionBar =  getActionBar();
ActionBar actionBar =  getSupportActionBar();

score 1 · Answer 2 · answered Dec 15 '15 at 18:47

As you're using a Toolbar, and probably an ActionBarActivity, you don't have a built-in ActionBar. The ActionBarActivity provides a wrapper around the Toolbar exposing usual ActionBar methods (like setDisplayShowHomeEnabled(boolean enabled)). But to get this wrapper, you have to call getSupportActionBar() instead of getActionBar().

In your code, it simply translates to this:

public void setupDrawer(){
    // ...

    mDrawerToggle.setDrawerIndicatorEnabled(true);
    drawerLayout.setDrawerListener(mDrawerToggle);
    ActionBar actionBar =  getSupportActionBar();

    if(actionBar != null) {
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setDisplayShowHomeEnabled(true);
        actionBar.setIcon(R.drawable.ic_launcher);
    }
}

Thanks for the answer, but it show the back arrow and I want to show the hamburguer icon, but i fixed it using this solution > http://stackoverflow.com/a/28136349/1879661, but not sure if is the best solution, what you think? — diogojme, Dec 15 '15 at 19:25

score 0 · Answer 3 · edited May 23 '17 at 11:44

After fixed it from @BahodirovMirjalol solution:

mDrawerToggle.setDrawerIndicatorEnabled(true);
drawerLayout.setDrawerListener(mDrawerToggle);
ActionBar actionBar =  getSupportActionBar();

I got another problem because navigation back icon show instead hamburguer, so I added this two methods above my onCreate method and it works:

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

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // Pass any configuration change to the drawer toggls
    mDrawerToggle.onConfigurationChanged(newConfig);
}

found here

Navigation drawer hamburguer icon doesn't show until swipe drawer manually

3 Answers3