Örnek Java Dosyası.

Butona basıldığında, ekrandaki TextView'in içeriğini 1 yapan Java kodu.

submitOrder fonksiyonu, XML içinde onClick özelliği ile tetikleniyor.

package com.example.ersanaskin.justjava;
/** * Add your package below. Package name can be found in the project's AndroidManifest.xml file. * This is the package name our example uses: * * package com.example.android.justjava; */
import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.TextView;
/** * This app displays an order form to order coffee. */public class MainActivity extends AppCompatActivity {

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

    /**     * This method is called when the order button is clicked.     */    public void submitOrder(View view) {
        display(1);    }

    /**     * This method displays the given quantity value on the screen.     */    private void display(int number) {
        TextView quantityTextView = (TextView) findViewById(R.id.quantity_text_view);        quantityTextView.setText("" + number);    }
}