Given the following code snipet from page 35 of your book
Code:
package net2.learn2develop.Dialog;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.app.ProgressDialog;
import android.os.Handler;
import android.os.Message;
public class MainActivity extends Activity {
CharSequence[] items = { "Google", "Apple", "Microsoft" };
boolean[] itemsChecked = new boolean [items.length];
public void OnCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btn = (Button) findViewById(R.id.btn_dialog);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
showDialog(0);
}
});
}
}
With the Main.xml file listing as :
Code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
<Button
android:id="@+id/btn_dialog"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Click to display a dialog" />
</LinearLayout>
I get the following compile error :
btn_dialog can not be resolved or is not a field. This code was cut copied pasted straight into the Android application. This book is a very, very poor book for beginners to say the least. The book doesn't go into enough instructions on a step by step basis on what to do and how to go about doing it. The screen shots with Eclipse with the Android SDK also don't even come close to matching up to what I am running right now, so even creating a new Android project leaves a lot to confusion.
Btn code not accessible
