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Android Build a Simple Android App Basic Android Programming Initializing a Button

Posted by Yusuf Mohamed
Yusuf Mohamed
2,631 Points

My java code isn't working

So the challenge is "Initialize the showFactButton variable using the findViewById() method like the TextView above it. The ID for the button is showFactButton, and don't forget to cast it to a Button with (Button)!" so basically you can see in the code how I was doing the showFactButton but it doesnt work. I did it on android studio and it worked there but not for.

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

public class FunFactsActivity extends Activity {

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

        // Declare our View variables and assign them the Views from the layout file
        TextView factLabel = (TextView) findViewById(R.id.factTextView);
        mFactTextView = (Button) findViewById(R.id.showFactButton) ;
    }
}

1 Answer

Joseph Wasden
Joseph Wasden
20,406 Points

You've botched the type and naming of the variable. Keep it the same as it is with the default code at the beginning of the challenge and you're golden.

I've commented the relevent code below.

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

public class FunFactsActivity extends Activity {

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

        // Declare our View variables and assign them the Views from the layout file
        TextView factLabel = (TextView) findViewById(R.id.factTextView);

       //See how I declared the type Button and then declared the name of that button as showFactButton?
        Button showFactButton = (Button) findViewById(R.id.showFactButton);
    }
}
Yusuf Mohamed
Yusuf Mohamed
2,631 Points

Thanks for the help.