//JAVA CODE

package kuruza.pizza;

import android.app.Activity;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;


public class Pizza extends Activity implements View.OnClickListener {


    TextView Pizza;
    CheckBox Extra_cheese;
    CheckBox Chicken;
    Button bu;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pizza);

        Pizza= (TextView) findViewById(R.id.pizza);
        Extra_cheese= (CheckBox) findViewById(R.id.cheese);
        Chicken= (CheckBox) findViewById(R.id.chicken);
        bu= (Button) findViewById(R.id.button);
        bu.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {

        String newline=System.getProperty("line.separator");
        StringBuffer buffer=new StringBuffer();
        buffer.append(getString(R.string.Piz));

        if(Extra_cheese.isChecked())
        {
            buffer.append(newline);
            buffer.append(R.string.Extra);
        }
        if(Chicken.isChecked())
        {
            buffer.append(newline);
            buffer.append(R.string.Chick);
        }
        Toast.makeText(this,buffer.toString(),Toast.LENGTH_LONG).show();
    }
}


//LAYOUT

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".Pizza">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="@string/Piz"
        android:id="@+id/pizza"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="56dp" />

    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/Extra"
        android:id="@+id/cheese"
        android:layout_below="@+id/pizza"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="40dp"
        android:checked="false" />

    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/Chick"
        android:id="@+id/chicken"
        android:layout_marginTop="42dp"
        android:checked="false"
        android:layout_below="@+id/cheese"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/But"
        android:id="@+id/button"
        android:layout_alignParentBottom="true"
        android:layout_toEndOf="@+id/chicken"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>


//STRINGS.XML

<resources>

    <string name="app_name">Pizza</string>
   <string name="Piz">Pizza</string>
    <string name="Extra">Extra Cheese</string>
    <string name="Chick">Chicken</string>
    <string name="But">Order</string>>
    <string name="action_settings">Settings</string>

</resources>