手表样式的时间并且时间是变化的

效果显示图如下

定义一个Activity

package cn.mw.com;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.widget.AnalogClock;

import android.widget.DigitalClock;

import android.widget.TextView;

public class EX02_01Activity extends Activity {

// 声明两个widget对象

private static AnalogClock ac;

private DigitalClock dc;

private TextView mTextView;

// 声明一常数作为判别信息用

protected static final int GUINOTIFIER = 0x1234;

// 声明与时间相关的变量

public Calendar mCalendar;

public int mMinutes;

public int mHour;

private int msecond;

// 声明关键 Handler 与Thread 变量

public Handler mHandler;

private Thread mClockThread;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

mTextView = (TextView) findViewById(R.id.tv1);

ac = (AnalogClock) findViewById(R.id.anclock);

dc = (DigitalClock) findViewById(R.id.digitalclock01);

mHandler = new Handler() {

public void handleMessage(Message msg) {

// 这里是处理信息的方法

switch (msg.what) {

case EX02_01Activity.GUINOTIFIER:

// 在这里处理TextView对象show时间事件

mTextView.setText(mHour + " : " + mMinutes);

break;

}

super.handleMessage(msg);

}

};

* 通过进程来持续取得系统时间

*/mClockThread = new LooperThread();

mClockThread.start();

}

// 改写一个Thread Class 用来持续取得系统时间

class LooperThread extends Thread {

public void run() {

super.run();

try {

do {

// 取得系统时间

long time = System.currentTimeMillis();

/* 通过Calendar 对象来取得小时与分钟 */

final Calendar mCalendar = Calendar.getInstance();

mCalendar.setTimeInMillis(time);

mHour = mCalendar.get(Calendar.HOUR);

mMinutes = mCalendar.get(Calendar.MINUTE);

msecond = mCalendar.get(Calendar.MINUTE);

// 让进程休息一秒

Thread.sleep(1000);

Message m = new Message();

m.what = EX02_01Activity.GUINOTIFIER;

EX02_01Activity.this.mHandler.sendMessage(m);

} while (EX02_01Activity.LooperThread.interrupted() == false);

// 当系统发出中断信息后停止本次循环

} catch (Exception e) {

e.printStackTrace();

}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

</LinearLayout>

手表样式的时间并且时间是变化的

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