Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android Build a Simple Android App with Java Improving Our Code Dynamically Changing the Background Color

The code below has a RelativeLayout variable named mealLayout. Change the background color of this layout to green. Use

What could be the problem here?

MealActivity.java
import android.os.Bundle;
import android.widget.TextView;

public class MealActivity extends Activity {


  @Override
    private RelativeLayout relativeLayout;  
    public void onCreate(Bundle savedInstanceState) {
        mealLayout.setBackgroundColor (Color.GREEN);
        setContentView(R.layout.activity_meal);

        TextView foodLabel = (TextView) findViewById(R.id.foodTextView);
        TextView drinkLabel = (TextView) findViewById(R.id.drinkTextView);
       RelativeLayout mealLayout = (RelativeLayout) findViewById(R.id.mealLayout);
    }
}

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there, Sezare Freta Miguel ! The line of code you added is actually fine, but it's a little misplaced. You can't change the background color of something that isn't yet defined. The mealLayout variable is defined in the last line. Moving your line of code below that line causes this challenge to pass!

Hope this helps! :sparkles:

Thank you, Jennifer Nordell...