如果您还需要在UI线程上运行代码(而不是在计时器线程上)，请查看博客:http://steve.odyfamily.com/?p=12

public class myActivity extends Activity {
private Timer myTimer;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.main);

    myTimer = new Timer();
    myTimer.schedule(new TimerTask() {          
        @Override
        public void run() {
            TimerMethod();
        }

    }, 0, 1000);
}

private void TimerMethod()
{
    //This method is called directly by the timer
    //and runs in the same thread as the timer.

    //We call the method that will work with the UI
    //through the runOnUiThread method.
    this.runOnUiThread(Timer_Tick);
}


private Runnable Timer_Tick = new Runnable() {
    public void run() {

    //This method runs in the same thread as the UI.               

    //Do something to the UI thread here

    }
};
}

这很简单! 你创建了一个新的定时器。

Timer timer = new Timer();

然后扩展计时器任务

class UpdateBallTask extends TimerTask {
   Ball myBall;

   public void run() {
       //calculate the new position of myBall
   }
}

然后以一定的更新间隔将新任务添加到Timer中

final int FPS = 40;
TimerTask updateBall = new UpdateBallTask();
timer.scheduleAtFixedRate(updateBall, 0, 1000/FPS);

声明:这不是理想的解决方案。这是使用定时器类的解决方案(由OP要求)。在Android SDK中，建议使用Handler类(在接受的答案中有示例)。

如果有人感兴趣，我开始尝试创建一个标准对象来运行在活动UI线程上。好像还行。欢迎评论。我想这是可用的布局设计器作为一个组件拖到一个活动。真不敢相信这样的东西竟然不存在。

package com.example.util.timer;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;

public class ActivityTimer {

    private Activity m_Activity;
    private boolean m_Enabled;
    private Timer m_Timer;
    private long m_Delay;
    private long m_Period;
    private ActivityTimerListener m_Listener;
    private ActivityTimer _self;
    private boolean m_FireOnce;

    public ActivityTimer() {
        m_Delay = 0;
        m_Period = 100;
        m_Listener = null;
        m_FireOnce = false;
        _self = this;
    }

    public boolean isEnabled() {
        return m_Enabled;
    }

    public void setEnabled(boolean enabled) {
        if (m_Enabled == enabled)
            return;

        // Disable any existing timer before we enable a new one
        Disable();

        if (enabled) {
            Enable();
        }
    }

    private void Enable() {
        if (m_Enabled)
            return;

        m_Enabled = true;

        m_Timer = new Timer();
        if (m_FireOnce) {
            m_Timer.schedule(new TimerTask() {
                @Override
                public void run() {
                    OnTick();
                }
            }, m_Delay);
        } else {
            m_Timer.schedule(new TimerTask() {
                @Override
                public void run() {
                    OnTick();
                }
            }, m_Delay, m_Period);
        }
    }

    private void Disable() {
        if (!m_Enabled)
            return;

        m_Enabled = false;

        if (m_Timer == null)
            return;

        m_Timer.cancel();
        m_Timer.purge();
        m_Timer = null;
    }

    private void OnTick() {
        if (m_Activity != null && m_Listener != null) {
            m_Activity.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    m_Listener.OnTimerTick(m_Activity, _self);
                }
            });
        }
        if (m_FireOnce)
            Disable();
    }

    public long getDelay() {
        return m_Delay;
    }

    public void setDelay(long delay) {
        m_Delay = delay;
    }

    public long getPeriod() {
        return m_Period;
    }

    public void setPeriod(long period) {
        if (m_Period == period)
            return;
        m_Period = period;
    }

    public Activity getActivity() {
        return m_Activity;
    }

    public void setActivity(Activity activity) {
        if (m_Activity == activity)
            return;
        m_Activity = activity;
    }

    public ActivityTimerListener getActionListener() {
        return m_Listener;
    }

    public void setActionListener(ActivityTimerListener listener) {
        m_Listener = listener;
    }

    public void start() {
        if (m_Enabled)
            return;
        Enable();
    }

    public boolean isFireOnlyOnce() {
        return m_FireOnce;
    }

    public void setFireOnlyOnce(boolean fireOnce) {
        m_FireOnce = fireOnce;
    }
}

在活动中，我有这样的onStart:

@Override
protected void onStart() {
    super.onStart();

    m_Timer = new ActivityTimer();
    m_Timer.setFireOnlyOnce(true);
    m_Timer.setActivity(this);
    m_Timer.setActionListener(this);
    m_Timer.setDelay(3000);
    m_Timer.start();
}

如果您还需要在UI线程上运行代码(而不是在计时器线程上)，请查看博客:http://steve.odyfamily.com/?p=12

public class myActivity extends Activity {
private Timer myTimer;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.main);

    myTimer = new Timer();
    myTimer.schedule(new TimerTask() {          
        @Override
        public void run() {
            TimerMethod();
        }

    }, 0, 1000);
}

private void TimerMethod()
{
    //This method is called directly by the timer
    //and runs in the same thread as the timer.

    //We call the method that will work with the UI
    //through the runOnUiThread method.
    this.runOnUiThread(Timer_Tick);
}


private Runnable Timer_Tick = new Runnable() {
    public void run() {

    //This method runs in the same thread as the UI.               

    //Do something to the UI thread here

    }
};
}

这里有一个简单可靠的方法…

将以下代码放入Activity中，当Activity处于“恢复”状态时，tick()方法将在UI线程中每秒调用一次。当然，您可以更改tick()方法来做您想做的事情，或者更频繁地调用它。

@Override
public void onPause() {
    _handler = null;
    super.onPause();
}

private Handler _handler;

@Override
public void onResume() {
    super.onResume();
    _handler = new Handler();
    Runnable r = new Runnable() {
        public void run() {
            if (_handler == _h0) {
                tick();
                _handler.postDelayed(this, 1000);
            }
        }

        private final Handler _h0 = _handler;
    };
    r.run();
}

private void tick() {
    System.out.println("Tick " + System.currentTimeMillis());
}

对于那些感兴趣的人来说，“_h0=_handler”代码是必要的，以避免在tick周期内暂停和恢复活动时同时运行两个计时器。

我用这种方法:

String[] array={
       "man","for","think"
}; int j;

然后在onCreate下面

TextView t = findViewById(R.id.textView);

    new CountDownTimer(5000,1000) {

        @Override
        public void onTick(long millisUntilFinished) {}

        @Override
        public void onFinish() {
            t.setText("I "+array[j] +" You");
            j++;
            if(j== array.length-1) j=0;
            start();
        }
    }.start();

解决这个问题很简单。