<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent" >

	<Chronometer

	    android:id="@+id/myChronometer"

	    android:layout_width="wrap_content"

	    android:layout_height="wrap_content"/>

	<LinearLayout

	    android:orientation="horizontal"

	    android:layout_width="fill_parent"

	    android:layout_height="fill_parent">

	    <Button

	        android:id="@+id/butStart"

	        android:text="开始计时"

	        android:layout_width="wrap_content"

	        android:layout_height="wrap_content"/>

	    <Button

	        android:id="@+id/butStop"

	        android:text="停止计时"

	        android:layout_width="wrap_content"

	        android:layout_height="wrap_content"/>

	</LinearLayout>

</LinearLayout>

package com.example.myclock;

import android.os.Bundle;

import android.os.SystemClock;

import android.os.Vibrator;

import android.app.Activity;

import android.app.Service;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Chronometer;

import android.widget.Chronometer.OnChronometerTickListener;

public class MainActivity extends Activity {

	private Chronometer myChronometer = null;

	private Button butStart = null;

	private Button butStop = null;

	private Vibrator vibrator = null;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        this.myChronometer = (Chronometer)super.findViewById(R.id.myChronometer);

        this.vibrator = (Vibrator)super.getApplication().getSystemService(Service.VIBRATOR_SERVICE);

        this.butStart = (Button)super.findViewById(R.id.butStart);

        this.butStop = (Button)super.findViewById(R.id.butStop);

        this.butStart.setOnClickListener(new OnClickListenerlmplStart());

        this.butStop.setOnClickListener(new OnClickListenerlmplStop());

        this.myChronometer.setFormat("当前计时时间：%s。");

        this.myChronometer.setOnChronometerTickListener(new OnChronometerTickListenerlmpl());

    }

    private class OnChronometerTickListenerlmpl implements OnChronometerTickListener{

    	public void onChronometerTick(Chronometer chronometer){

    		String time = chronometer.getText().toString().replaceAll("[^(\\d{2}:\\d{2})]", "");

    		if("01:00".equals(time)){

    			MainActivity.this.vibrator.vibrate(new long[]{1000,10,1000,100},0);

    		}

    	}

    }

    private class OnClickListenerlmplStart implements OnClickListener{

    	public void onClick(View view){

    		MainActivity.this.myChronometer.start();

    	}

    }

    private class OnClickListenerlmplStop implements OnClickListener{

    	public void onClick(View view){

    		MainActivity.this.myChronometer.stop();

    		MainActivity.this.myChronometer.setBase(SystemClock.elapsedRealtime());

    		MainActivity.this.vibrator.cancel();

    	}

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.activity_main, menu);

        return true;

    }

}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.myclock"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="16"

        android:targetSdkVersion="15" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            android:label="@string/title_activity_main" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

	<uses-permission

	    android:name="android.permission.VIBRATE"/>

</manifest>