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

prosper nyamukondiwa
prosper nyamukondiwa
656 Points
Posted by prosper nyamukondiwa
prosper nyamukondiwa
656 Points

changing background color

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

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

public class MealActivity extends Activity {


  @Override
    private RelativeLayout relativeLayout;  
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        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);
    }   relativeLayout.setBackgroundColor Color GREEN};
}
Tawanda Mukungureyi
Tawanda Mukungureyi
7,361 Points

Insert your code inside the onCreate method and use mealLayout.setBackgroungColor instaead of ralativeLayout, again your constant color.green should be inside parentheses () like this (color.GREEN) witha small latter "c" on color

1 Answer

Kevin Verbeek
Kevin Verbeek
5,499 Points
Kevin Verbeek
Kevin Verbeek
5,499 Points

Change the last relativeLayout to mealLayout. Also put it inside the curly bracket of the oncreate method. like this:

mealLayout.setBackgroundColor (color.GREEN);

then put this statement inside the onCreate method within the { }