AnalogClock和DigitalClock
本篇主要介绍一下AnalogClock和DigitalClock控件。
package com.kevin.clock;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 Main extends Activity {private static final int MSGTYPE = 1;private AnalogClock analogClock;private TextView tv_title;private DigitalClock digitalClock;private Calendar calendar;private int hour;private int minute;private int second;private Handler handler;private Thread thread;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);tv_title = (TextView) findViewById(R.id.tv_title);analogClock = (AnalogClock) findViewById(R.id.analogClock1);digitalClock = (DigitalClock) findViewById(R.id.digitalClock1);// 通过Handler来接受线程锁传递的信息并更新TextViewhandler = new Handler() {@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case MSGTYPE:tv_title.setText(hour + ":" + minute + ":" + second);break;default:break;}super.handleMessage(msg);}};// 每隔一秒取得系统时间thread = new LooperThread();thread.start();}class LooperThread extends Thread {@Overridepublic void run() {try {while (true) {// 取得系统时间long time = System.currentTimeMillis();calendar = Calendar.getInstance();calendar.setTimeInMillis(time);second = calendar.get(Calendar.SECOND);minute = calendar.get(Calendar.MINUTE);hour = calendar.get(Calendar.HOUR_OF_DAY);Thread.sleep(1000);Message msg = new Message();msg.what = MSGTYPE;handler.sendMessage(msg);}} catch (Exception e) {e.printStackTrace();}}}}