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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

please help this answer keeps giving the error message on changing background color

changing background color here is my answer mealLayout.setBackgroundColor(Color.GREEN); but its not working please hellpppppppp

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

public class MealActivity extends Activity {


  @Override  
    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);
    }   mealLayout.backgroundColor(Color.GREEN);
}
prosper nyamukondiwa
prosper nyamukondiwa
656 Points
prosper nyamukondiwa
prosper nyamukondiwa
656 Points

hmm i suspect the treehouse code system somehow is corrupted coz all is not working at all i have tried my best and the communities best but no success

1 Answer

Elias Svoba
Elias Svoba
14,347 Points
Elias Svoba
Elias Svoba
14,347 Points

hi Pro; The code is fine but try to set it within onCreate:

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

public class MealActivity extends Activity {

@Override
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);
    mealLayout.backgroundColor(Color.GREEN);
}

}