DigitalClock直接放到Layout中就可以使用,不需要實現什麼代碼。
主要看看AnaLogClock和TextView(用於類比DigitalClock)的結合使用。
package com.example;
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.TextView;
public class EX0414 extends Activity {
/** Called when the activity is first created. */
//聲明一常數作為判別資訊用
protected static final int GUINOTIFIER = 0x1234;
//聲明兩個widget物件變數
private TextView mTextView;
public AnalogClock mAnalogClock;
//聲明與時間相關的變數
public Calendar mCalendar;
public int mMinutes;
public int mHour;
//聲明關鍵Handler與Thread變數
public Handler mHandler;
private Thread mClockThread;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mTextView =(TextView)findViewById(R.id.myTextView);
mAnalogClock=(AnalogClock)findViewById(R.id.myAnalogClock);
//通過Handler來接收進程所傳遞的資訊並進行更新TextView
mClockThread = new LooperThread();
mClockThread.start();
mHandler = new Handler()
{
public void handleMessage(Message msg)
{
/*處理資訊方法*/
switch (msg.what)
{
case EX0414.GUINOTIFIER:
/*在這處理要TextView對象Show時間的事件*/
mTextView.setText(mHour+" : "+mMinutes);
break;
}
super.handleMessage(msg);
}
};
//通過進程來持續取得系統時間
}
class LooperThread extends Thread
{
public void run()
{
super.run();
try
{
do
{
/*取得系統時間*/
long time = System.currentTimeMillis();
final Calendar mCalendar = Calendar.getInstance();
mCalendar.setTimeInMillis(time);
mHour = mCalendar.get(Calendar.HOUR);
mMinutes = mCalendar.get(Calendar.MINUTE);
Thread.sleep(1000);
Message m = new Message();
m.what = EX0414.GUINOTIFIER;
EX0414.this.mHandler.sendMessage(m);
}while(EX0414.LooperThread.interrupted()==false);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
main.xml內容如下:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<AnalogClock
android:id="@+id/myAnalogClock"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
>
</AnalogClock>
<TextView
android:id="@+id/myTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:textSize="20sp"
android:layout_gravity="center_horizontal"
>
</TextView>
<DigitalClock
android:id="@+id/digitalClock1"
android:text="DigitalClock"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
</DigitalClock>
</LinearLayout>