[Android]ChronometerClock 計時器

[Chronometer 特點]當 Chronometer 開始計時後，即使按<暫停>時仍會繼續計時。


<ChronometerClock.java>
   1: package com.android.chronometerclock;

   2:  

   3: import android.app.Activity;

   4: import android.os.Bundle;

   5: import android.os.SystemClock;

   6: import android.view.View;

   7: import android.view.View.OnClickListener;

   8: import android.widget.Button;

   9: import android.widget.Chronometer;

  10: import android.widget.Chronometer.OnChronometerTickListener;

  11:  

  12: public class ChronometerClock extends Activity

  13: implements OnClickListener, OnChronometerTickListener

  14: {

  15:     private Chronometer chronometer; 

  16:     private Button btnStart, btnStop, btnReset, btnExit;

  17:     

  18:     public void onClick(View view) {  

  19:         switch (view.getId())  

  20:         {  

  21:             case R.id.startBtn:  

  22:                 chronometer.start(); 

  23:                 break;  

  24:             case R.id.stopBtn:  

  25:                 chronometer.stop(); 

  26:                 break;  

  27:             case R.id.resetBtn:

  28:                 chronometer.setBase(SystemClock.elapsedRealtime());  

  29:                 break;  

  30:             case R.id.exitBtn:

  31:                 android.os.Process.killProcess(android.os.Process.myPid());

  32:                 break;

  33:         }  

  34:     }  

  35:  

  36:      public void onChronometerTick(Chronometer chronometer) { 

  37:            

  38:     }  

  39:     

  40:     

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

  42:     @Override

  43:     public void onCreate(Bundle savedInstanceState) {

  44:         super.onCreate(savedInstanceState);

  45:         setContentView(R.layout.main);

  46:         findViews();

  47:         setListeners();

  48:         chronometer.setFormat("Chronometer 計時器：%s");

  49:     }

  50:   

  51:     private void findViews(){

  52:         btnStart = (Button) findViewById(R.id.startBtn);  

  53:         btnStop = (Button) findViewById(R.id.stopBtn);  

  54:         btnReset = (Button) findViewById(R.id.resetBtn);

  55:         btnExit = (Button) findViewById(R.id.exitBtn);

  56:         chronometer = (Chronometer) findViewById(R.id.chronometer);  

  57:     }

  58:     

  59:     private void setListeners() {

  60:         btnStart.setOnClickListener(this);  

  61:         btnStop.setOnClickListener(this);  

  62:         btnReset.setOnClickListener(this);

  63:         btnExit.setOnClickListener(this);

  64:         chronometer.setOnChronometerTickListener(this);  

  65:     }

  66:  

  67: }

<main.xml>

   1: <?xml version="1.0" encoding="utf-8"?>

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

   3:     android:layout_width="fill_parent"

   4:     android:layout_height="fill_parent"

   5:     android:orientation="vertical" >

   6:  

   7:     <Button

   8:         android:id="@+id/startBtn"

   9:         android:layout_width="match_parent"

  10:         android:layout_height="wrap_content"

  11:         android:text="@string/strStart" />

  12:  

  13:     <Button

  14:         android:id="@+id/stopBtn"

  15:         android:layout_width="match_parent"

  16:         android:layout_height="wrap_content"

  17:         android:text="@string/strStop" />

  18:  

  19:     <Button

  20:         android:id="@+id/resetBtn"

  21:         android:layout_width="match_parent"

  22:         android:layout_height="wrap_content"

  23:         android:text="@string/strReset" />

  24:  

  25:     <Button

  26:         android:id="@+id/exitBtn"

  27:         android:layout_width="match_parent"

  28:         android:layout_height="wrap_content"

  29:         android:text="@string/strExit" />

  30:  

  31:     <Chronometer

  32:         android:id="@+id/chronometer"

  33:         android:layout_width="wrap_content"

  34:         android:layout_height="wrap_content"

  35:         android:text="@string/strNull" />

  36:  

  37: </LinearLayout>

<strings.xml>

   1: <?xml version="1.0" encoding="utf-8"?>

   2: <resources>

   3:  

   4:     <string name="hello">Hello World, ChronometerClock!</string>

   5:     <string name="app_name">ChronometerClock</string>

   6:     <string name="strStart">開始</string>

   7:     <string name="strStop">暫停</string>

   8:     <string name="strReset">歸零</string>

   9:     <string name="strExit">離開</string>

  10:     <string name="strNull"></string>

  11:     

  12:     

  13: </resources>