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Android Build a Simple Android App (2014) Basic Android Programming Initializing a Button

I don't get this.

Can someone re-explain this to me in a basic form because I dont't Know what I'm suppose to do.

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)!

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;
}

}

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);
        Button showFactButton;
    }
}

4 Answers

Charles Van Way
Charles Van Way
5,814 Points

Gilbert's line works. Or, separating declaration from definition,

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

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

Hope that works!

Thank you guys

ua wlcme