Android Studio /试图改变应用程序的背景颜色？

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

我想你的意思是AppBar的颜色。 您可以在色彩搭配

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

增加价值做到这一点：

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

答案是从这里： Change action bar color in android

Answer 2

如果你想在XML做 试试这个tutorial from google

如果您想在代码中设置它：

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 
     ... 
     } 
    ... 
    }