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

how to solve this im a bit confused by the question

What does the question mean?

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 {

  private TextView factTextView;
  private Button showFactButton;

    @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);
        Button showFactButton;
    }
}

2 Answers

Mahmoud Amin
PRO
Mahmoud Amin
Pro Student 6,269 Points

```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);
    Button showFactButton = (Button) findViewById(R.id.showFactButton);
}

}```

Moira Lawrie-Martyn
Moira Lawrie-Martyn
6,673 Points

So in this question, they're asking you to grab the two View variables and cast them into Java so that the program behind the layout can recognise the layout.

In this situation they're wanting you to take:

  private TextView factTextView;
  private Button showFactButton;

and tell Android where to find them in the layout, which you've almost got:

// Declare our View variables and assign them the Views from the layout file

        TextView factLabel = (TextView) findViewById(R.id.factTextView);
        Button showFactButton;

You'd want to change "factLabel" to "factTextView" so it matches the variable declared. You'd also want to take out the "TextView" part before it because it's already been declared.

With the button, it'd be the same. First off take out the "Button" part because it's already been declared, then add in the assignment which would be showFactButton = (Button) findViewById(R.id.showFactButton); which takes the showFactButton variable, tells Java it's looking for a button and where that button is in the layout.

Hope this helps :)