クラスを作成しました。Android を使用していると仮定すると、Android の残りの作業を行う必要があります。
public class TimerActivity extends Activity implements OnClickListener {
private CountDownTimer countDownTimer;
private boolean timerHasStarted = false;
private Button startB;
public TextView text;
private final long startTime = 30 * 1000;
private final long interval = 1 * 1000;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_timer);
startB = (Button) this.findViewById(R.id.button);
startB.setOnClickListener(this);
text = (TextView) this.findViewById(R.id.timer);
//NOTE: I don't know what you expect as the third parameter
countDownTimer = new CDT(startTime, interval, null);
text.setText(text.getText() + String.valueOf(startTime/1000));
}
@Override
public void onClick(View v) {
if (!timerHasStarted) {
countDownTimer.start();
timerHasStarted = true;
startB.setText("STOP");
} else {
countDownTimer.cancel();
timerHasStarted = false;
startB.setText("RESTART");
}
}
public class CDT extends CountDownTimer {
//your class definition that you wrote above.
}
}
次に、XML が必要です。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="@drawable/bgi" >
<TextView
android:id="@+id/timer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:paddingRight="10dip"
android:textSize="50dp" />
<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:text="Start" />
</RelativeLayout>
ソース:
http://androidbite.blogspot.com/2012/11/android-count-down-timer-example.html