ViewをTimerで更新するサンプル

MyActivity.java

package jp.noxi.sample.android.timer;

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

import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.TimeUnit;

public class MyActivity extends Activity {

    private Handler handler;
    private Timer timer;

    private TextView text1;
    private TextView text2;

    private int count1;
    private int count2;

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

        handler = new Handler();

        text1 = (TextView) findViewById(R.id.text1);
        text2 = (TextView) findViewById(R.id.text2);

        timer = new Timer();

        // Handler経由で更新
        timer.scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        text1.setText(String.valueOf(++count1));
                    }
                });
            }
        }, 0, TimeUnit.SECONDS.toMillis(1L));

        // Handlerを経由せずに更新
        timer.scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                text2.post(new Runnable() {
                    @Override
                    public void run() {
                        text2.setText(String.valueOf(++count2));
                    }
                });
            }
        }, 0, TimeUnit.SECONDS.toMillis(2L));
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (timer != null) {
            timer.cancel();
            timer.purge();
            timer = null;
        }
    }
}