Appcompatv7-v21导航抽屉没有显示汉堡图标

You need to call

mDrawerToggle.syncState();

When using the ActionBarDrawerToggle, you must call it during onPostCreate() and onConfigurationChanged()

    @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);
}

While including ActionBarDrawerToggle, make sure to use the post method:

mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});

Dont forget to override onOptionsItemSelected method and check if ctionBarDrawerToggle was clicked, in this case return true otherwise the activity will be finished.

@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}

you can call syncState() from your Activity's onPostCreate to synchronize the indicator with the state of the linked DrawerLayout after onRestoreInstanceState has occurred.

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

Also ActionBarDrawerToggle can be used directly as a DrawerLayout.DrawerListener, or if you are already providing your own listener, call through to each of the listener methods from your own.

private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
.
.
.
.
mDrawerLayout.setDrawerListener(mDrawerToggle);


mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});

mDrawerToggle.syncState() did not work for me, but I eventually got it to work with:

getSupportActionBar().setHomeAsUpIndicator(R.drawable.hamburger_icon);

I was, however, not using a Toolbar.

Make sure that you're importing the correct drawer toggle.

When I imported the v4 version I had the arrow (below).

import android.support.v4.app.ActionBarDrawerToggle;

Changing it to this (below, v7) fixed my issue.

import android.support.v7.app.ActionBarDrawerToggle;

Since my NavigationDrawer was extending a Fragment not an Activity I was not able to override postCreate. The below is what I did.

   ActionBar actionBar = getActionBar();
actionBar.setDisplayHomeAsUpEnabled(true); // this sets the button to the    back icon
actionBar.setHomeButtonEnabled(true); // makes it clickable
actionBar.setHomeAsUpIndicator(R.drawable.ic_drawer);// set your own icon

Hope it helps!

You can simply use this:

// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
getActionBar().setHomeAsUpIndicator(R.drawable.ic_drawer);
}
});

Make sure that you call

mDrawerToggle.syncState();

AFTER calling

getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);

This works for me. I have extended AppCompatActivity instead of ActionBarActivity.

mActionBarDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,null, R.string.drawer_opened, R.string.drawer_closed) {
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if( getSupportActionBar()!= null)
getSupportActionBar().setTitle(R.string.drawer_opened);
mActionBarDrawerToggle.syncState();
}


@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if(getSupportActionBar() != null)
getSupportActionBar().setTitle(R.string.drawer_closed);
mActionBarDrawerToggle.syncState();


}
};

Navigation drawer was not showing when clicking action bar menu. This fixed it for me.

   @Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
//add your switch statement




return super.onOptionsItemSelected(item);
}

I also got similar problem, in my case problem was, when initiating actionbartoggle, I was not passing valid toolbar argument (toolbar was initialized later), without a proper, non-null toolbar, ActionBarToggle will fail to create a hamburger icon.

actionBarToggle = ActionBarDrawerToggle(this, mDrawer, toolbar,
R.string.drawer_open, R.string.drawer_close);