ตัวอย่างโปรแกรม นับถอยหลัง CountDown

Code ส่วนของ main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <TextView android:id="@+id/showCount"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="TextView"
    android:textAppearance="?android:attr/textAppearanceLarge">
    </TextView>
    
</LinearLayout>

Code ส่วนของ Java

package slayer.countdown;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
import android.os.CountDownTimer;

public class CountDownActivity extends Activity {
 private TextView mTextField;
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
 
 mTextField = (TextView)findViewById(R.id.showCount);
 
  new CountDownTimer(30000, 1000) {
      public void onTick(long millisUntilFinished) {
          mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
      }
      public void onFinish() {
          mTextField.setText("done!");
      }
   }.start();
 }
}