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Android Build an Interactive Story App (Retired) User Input Finding Views by IDs

Posted by Elias Baruch
Elias Baruch
Courses Plus Student 910 Points

Initialize the member variable mExterminateButton using the findViewById() method. The ID for the button is button1. Don

Initialize the member variable mExterminateButton using the findViewById() method. The ID for the button is button1. Don't forget to cast the generic View returned by the method!

I have no idea on how to do this

MainActivity.java 
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {

    protected Button mExterminateButton;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Declare our view variables
      mExterminateButton.cast.findViewById(button1);

    }

}

4 Answers

Temidayo Adelakin
Temidayo Adelakin
17,505 Points
Temidayo Adelakin
Temidayo Adelakin
17,505 Points

To cast the class, you don't do .cast. If I want to cast the Button class into mExterminateButton, I have to do mExterminateButton = (Button).....

So to solve the question, you need to enter mExterminateButton = (Button) findViewById(R.id.button1);

Eman Tsal
Eman Tsal
836 Points
Eman Tsal
Eman Tsal
836 Points

It's kind of bad that they expect you to do this without ever truly explaining concepts like casting and what findViewByID really does. I've completed all the prior courses for Android but it only superficially glosses over these things and expects you to just type these things that might as well as be gibberish and follow along.

Dean Gladish
Dean Gladish
1,997 Points
Dean Gladish
Dean Gladish
1,997 Points

Yes, all you need to do is enter exterminateButton = (Button) findViewById(R.id.button1);

Elias Baruch
PLUS
Elias Baruch
Courses Plus Student 910 Points
Elias Baruch
Elias Baruch
Courses Plus Student 910 Points

thank you very much!

Alex Alexander
Alex Alexander
5,673 Points

Remember to mark the solution as "Best Answer"!

Andy Hammond
Andy Hammond
5,415 Points

I looked this up and I was like...I just did that...to find out i had "extermination" not "exterminate" im now realizing how important it is to spell check my code :P