Develop Reference

Android - invisible ActionBar with back button

I know how to implment ActionBar with back button. But I want to make ActionBar invisible or with no background, I want to have only visible back button arrow. Is it possible?

With a little of search you will find the response. Any way you can try this :
ActionBar actionBar = getSupportActionBar();
actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#00000000")));
If you want to have your tab background below your ActionBar add this too :
actionBar.setStackedBackgroundDrawable(new ColorDrawable(Color.parseColor("#00000000")));

Add image to left side of action bar ?

I need add a image in between navigation button and drop-down in action-bar.How can I do this?

you need to call setIcon() it will change the icon
getActionBar();
ActionBar actionBar = getActionBar();
actionBar.setIcon(R.drawable.my_icon);
see this for more detail

android: how to remove the back/home button in the action bar

I am having difficulties trying to remove the back/home button from the action bar.
getActionBar().setDisplayShowHomeEnabled(false); //disable back button
getActionBar().setHomeButtonEnabled(false);
In a older android phone, the back button is removed with these two code lines. However with the nexus 4, the back button still appears but is just disabled. Also I am just adding a menu item on the right that behaves like the back/home button replacing the back/home button. What am I missing?

Use getActionBar().setDisplayHomeAsUpEnabled(false) to remove the home button from the action bar.

If you're on API level 14 or above and are not using ActionbarSherlock, this code in onCreateOptionsMenu will disable the up button, remove the left caret, and remove the icon:
ActionBar actionBar = getActionBar();
if (actionBar != null) {
actionBar.setHomeButtonEnabled(false); // disable the button
actionBar.setDisplayHomeAsUpEnabled(false); // remove the left caret
actionBar.setDisplayShowHomeEnabled(false); // remove the icon
}
source: https://stackoverflow.com/a/24967862/2887103

ElectronicGeeks answer is correct.
For API lower than 11, Use:
getSupportActionBar().setDisplayHomeAsUpEnabled(false);

To control the up affordance, use setDisplayHomeAsUpEnabled().

None of the suggested solutions works for me.
But this one does:
// Hide the back button
mActionBar.setHomeAsUpIndicator(null);
It is a kind of a hack (last resort solution), though, so showing the action bar again means setting its icon back again.

This worked for me :)
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(false);

For Kotlin;
(activity as AppCompatActivity).supportActionBar?.setDisplayHomeAsUpEnable(false)

In the case where you have used toolbar as Action bar:-
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Use the below code to hide the navigation button:-
toolbar.setNavigationIcon(null);

This code work for me
For remove navigation bar
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
For remove status bar
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);
ฺBut above code, it show again when you touch on screen, so if you want static state, combine this code.
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_IMMERSIVE);

You can use this code :
toggle.setDrawerIndicatorEnabled(false);
Works great for me.

Removing an icon from the Actionbar

I want a custom ActionBar with Tabs that has a graphic background (displaying just one image) and 3 tabs.
I can't remove the icon of the actionbar.I've been through tens of stackoverflow questions about how to remove the icon and title, but nothing worked.
I have a minSdk=14, ViewPager, ActionBar compat7, ActionBarActivity. Would any of these hinder it?
This is the code I have. Some declarations are excessive, I've been trying everything I could.
The best I got is an actionbar with no title, but the icon never goes away.
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayHomeAsUpEnabled(false);
actionBar.setDisplayUseLogoEnabled(false);
actionBar.setHomeButtonEnabled(false);
actionBar.setDisplayShowHomeEnabled(false); // this hides the icon well but doesn't
// work if you use actionbar tabs (viewpager)
solution below
Thanks

Have you tried for actionBar.setDisplayShowHomeEnabled(false)

The solution is this:
((View)findViewById(android.R.id.home).getParent()).setVisibility(View.GONE);
as seen on: https://github.com/JakeWharton/ActionBarSherlock/issues/327#issuecomment-10593286
Using actionBar.setDisplayShowHomeEnabled(false) hides the icon, but your actionbar ends up being below the viewpager tabs (if you're using any)

Hide Home button on ActionBar Sherlock Actionbar extending Navigation Activity

I am using ActionBarSherlock on my simple app and would like to hide the HOME button if the user is on the home/main activity. I understand how to do so with the setHomeButtonEnabled(false), however, I am extending a class that contains my navigation and has setHomeButtonEnabled(true) and I cannot seem to overwrite that setting in my main activity.
Thanks to #andy I am able to get rid of the icon, however, I cannot get rid of the < arrow. Any ideas?
Thanks for any help.

With ActionBarSherlock just put this in your home/main activity onCreate() method:
final ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(false);

The only way I have found to do this is to not have this set on your baseActivity:
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
and then set it as you will for each activity that requires the menu:
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
or
getSupportActionBar().setDisplayHomeAsUpEnabled(false);

Get the home button view and apply this
mHomeButton.setVisibility(View.INVISIBLE);