Android Studio / Trying to change background color in app?

Question

Hey guys I'm having a small issue I cant for the life of me figure out what I did wrong to not allow myself to change the background color in my app. See image for example at the Top where it says AppStack I want to change the background color of that instead of it being white. Is there something I am missing any help would be greatly appreciated thank you.!

Answer 1

I think you mean to the AppBar color. You can do it with

ActionBar bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(getRes‌​ources().getColor(R.c‌​olor.mycolor)); 

Add value in colors:

<color name="mycolor">#FFFFFF</color>

The answer is from here: Change action bar color in android

Answer 2

If you want to do in XML Try this tutorial from google

If you want to set it up in code:

public class MainActivity extends AppCompact {

      @Override
      protected void onCreate(final Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         ActionBar actionBar = getActionBar();
         actionBar.setBackgroundDrawable(new ColorDrawable(Color.BLUE)); // set your desired color
         ...
      }
     ...
  }