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

Posted by Richie Dalton
Richie Dalton
693 Points

I'm really stuck on this part can anyone give me some tips would love it cuz i wanna start working again

I really don't know what he wants me to do

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

    }

}

1 Answer

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Hi Richie,

This is connecting the button that's declared in the code to the button that's drawn in the GUI. So, when the user clicks the button on the screen, the code knows what it's supposed to do.

The code button is declared as mExterminateButton, in the GUI, it is called button1.

In the exercises, you'll have used statements like findViewById which is what you need here too. The solution looks like:

mExterminateButton = (Button) findViewById(R.id.button1);

So, the graphical button is access by its location, R.id.button1 using the findViewById method. That returns an object that needs casting to the type you want, hence the (Button) preceding it.

I hope that helps!

Steve.