Android多功能時(shí)鐘開(kāi)發(fā)案例（實(shí)戰(zhàn)篇）

更新時(shí)間：2016年05月31日 15:01:29 投稿：lijiao

這篇文章主要為大家詳細(xì)介紹了Android多功能時(shí)鐘開(kāi)發(fā)案例，開(kāi)發(fā)了時(shí)鐘、鬧鐘、計(jì)時(shí)器和秒表，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

上一篇為大家介紹的是Android多功能時(shí)鐘開(kāi)發(fā)基礎(chǔ)內(nèi)容，大家可以回顧一下，Android多功能時(shí)鐘開(kāi)發(fā)案例（基礎(chǔ)篇）

接下來(lái)進(jìn)入實(shí)戰(zhàn)，快點(diǎn)來(lái)學(xué)習(xí)吧。

一、時(shí)鐘

在布局文件中我們看到，界面上只有一個(gè)TextView，這個(gè)TextView的作用就是顯示一個(gè)系統(tǒng)的當(dāng)前時(shí)間，同時(shí)這個(gè)時(shí)間還是一秒一秒跳的，要實(shí)現(xiàn)一秒一秒的跳就需要我們每隔一秒就要刷新一下，同時(shí)我們這里還考慮了切換到另一個(gè)Tab的時(shí)候，這個(gè)時(shí)間就不跳動(dòng)了，這樣就會(huì)減少這個(gè)對(duì)系統(tǒng)的占用，考慮到了這點(diǎn)我們?cè)谶@里用到了Handler，通過(guò)handler發(fā)送的msg.what 來(lái)判斷是否要刷新時(shí)間。

public class TimeView extends LinearLayout { 
 
 private TextView tvTime; 
 public TimeView(Context context) { 
 super(context); 
 } 
 
 public TimeView(Context context, AttributeSet attrs) { 
 super(context, attrs); 
 } 
 
 public TimeView(Context context, AttributeSet attrs, int defStyle) { 
 super(context, attrs, defStyle); 
 } 
 
 @Override 
 protected void onFinishInflate() { 
 super.onFinishInflate(); 
 tvTime = (TextView) findViewById(R.id.tvTime); 
 //tvTime.setText("hello"); 
  
 timeHandler.sendEmptyMessage(0); 
 } 
 
 @Override 
 protected void onVisibilityChanged(View changedView, int visibility) { 
 super.onVisibilityChanged(changedView, visibility); 
 //當(dāng)再次切換到這個(gè)Tab時(shí)我們就再發(fā)送一次這個(gè)消息，否者就把所有的消息移除掉 
 if (visibility == View.VISIBLE) { 
  timeHandler.sendEmptyMessage(0);  
 }else{ 
  timeHandler.removeMessages(0); 
 } 
 } 
 
 private void refreshTime(){ 
 //獲取當(dāng)前的時(shí)間 
 Calendar c = Calendar.getInstance(); 
  
 tvTime.setText(String.format("%d:%d:%d", c.get(Calendar.HOUR_OF_DAY),c.get(Calendar.MINUTE),c.get(Calendar.SECOND))); 
 } 
 private Handler timeHandler = new Handler(){ 
 public void handleMessage(android.os.Message msg) { 
  refreshTime(); 
  
  //處于當(dāng)前Tab的時(shí)候給自己發(fā)送信息，可以刷新 
  if (getVisibility() == View.VISIBLE) {  
  //1秒鐘后再次執(zhí)行以下sendEmptyMessage，what參數(shù)用于區(qū)分不同的message 
  timeHandler.sendEmptyMessageDelayed(0, 1000); 
  } 
 }; 
 }; 
}

其實(shí)這里的Handler可以用Timer來(lái)完成亦可以達(dá)到同樣的效果。

在這里要提一下的是onFinishInflate()，這在我們自定義布局的時(shí)候一定要用到的，解釋以及例子在之后上傳的知識(shí)點(diǎn)中同樣有，看看那個(gè)就可以了。

二、鬧鐘

從第二個(gè)布局中我們可以看到，我們?cè)谶@里用到了一個(gè)ListView，這是用來(lái)存儲(chǔ)我們添加的鬧鐘的，既然這里用到了ListView，那么我們接著就會(huì)想到要給這個(gè)ListView一個(gè)適配器adapter，因此我們會(huì)在這里創(chuàng)建這么一個(gè)適配器，
private ArrayAdapter<AlarmData> adapter;

看到這里可能又會(huì)有疑問(wèn)了，AlarmData這是個(gè)什么東西？有這么一個(gè)數(shù)據(jù)類型嗎？？其實(shí)這里我們自定義了一個(gè)數(shù)據(jù)類型，用來(lái)專門(mén)存儲(chǔ)一下創(chuàng)建的鬧鐘時(shí)間。我們來(lái)看一下自定義的數(shù)據(jù)類型代碼吧！

// 自定義數(shù)據(jù)類型 
 private static class AlarmData { 
 private long time = 0; 
 private Calendar date; 
 private String timeLabel = ""; 
 
 public AlarmData(long time) { 
  this.time = time; 
  date = Calendar.getInstance(); 
  date.setTimeInMillis(time); 
  timeLabel = String.format("%d月%d日 %d:%d", 
   date.get(Calendar.MONTH) + 1, 
   date.get(Calendar.DAY_OF_MONTH), 
   date.get(Calendar.HOUR_OF_DAY), date.get(Calendar.MINUTE)); 
 } 
 
 public long getTime() { 
  return time; 
 } 
 
 public String getTimeLabel() { 
  return timeLabel; 
 } 
 
 public int getId() { 
  return (int) (getTime() / 1000 / 60); 
 } 
 
 @Override 
 public String toString() { 
  return getTimeLabel(); 
 } 
 
 }

這個(gè)數(shù)據(jù)類型的代碼其實(shí)還是很容易明白的，不多講了。

當(dāng)我們到這里的時(shí)候，我們其實(shí)還沒(méi)有真正的完成，假如我們的代碼已經(jīng)寫(xiě)好了，并且可以運(yùn)行了我們運(yùn)行一次后，并且添加了N個(gè)鬧鐘，當(dāng)我們退出程序，再次打開(kāi)就會(huì)發(fā)現(xiàn)，我們之前創(chuàng)建的鬧鐘都沒(méi)了，原因是我們雖然把數(shù)據(jù)臨時(shí)的保存在了ListView中，但是我們并沒(méi)有長(zhǎng)時(shí)間的保存，因此我們接著就來(lái)講講長(zhǎng)久的保存這些鬧鐘數(shù)據(jù)。

private void saveAlarmList() { 
 Editor editor = getContext().getSharedPreferences( 
  AlarmView.class.getName(), Context.MODE_PRIVATE).edit(); 
 
 StringBuffer sb = new StringBuffer(); 
 
 for (int i = 0; i < adapter.getCount(); i++) { 
  sb.append(adapter.getItem(i).getTime()).append(","); 
 } 
 if (sb.length() > 1) { 
  String content = sb.toString().substring(0, sb.length() - 1); 
  editor.putString(KEY_ALARM_LIST, content); 
 
  System.out.println(content); 
 } else { 
  editor.putString(KEY_ALARM_LIST, null); 
 } 
 editor.commit(); 
 }

有了保存，我們當(dāng)然的會(huì)想到讀取

private void readSaveAlarmList() { 
 SharedPreferences sp = getContext().getSharedPreferences( 
  AlarmView.class.getName(), Context.MODE_PRIVATE); 
 String content = sp.getString(KEY_ALARM_LIST, null); 
 
 if (content != null) { 
  String[] timeStrings = content.split(","); 
  for (String string : timeStrings) { 
  adapter.add(new AlarmData(Long.parseLong(string))); 
  } 
 } 
 }

上面的一些陌生的類型在之后的知識(shí)點(diǎn)中可以查看。

接著我們來(lái)看看最關(guān)鍵的就是添加鬧鐘

private void addAlarm() { 
 
 Calendar c = Calendar.getInstance(); 
 
 new TPDiolog(getContext(), new TimePickerDialog.OnTimeSetListener() { 
 
  @Override 
  public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 
 
  Calendar calendar = Calendar.getInstance(); 
  calendar.set(Calendar.HOUR_OF_DAY, hourOfDay); 
  calendar.set(Calendar.MINUTE, minute); 
  calendar.set(Calendar.SECOND, 0); 
  calendar.set(Calendar.MILLISECOND, 0); 
 
  Calendar currentTime = Calendar.getInstance(); 
  if (currentTime.getTimeInMillis() >= calendar.getTimeInMillis()) { 
   calendar.setTimeInMillis(calendar.getTimeInMillis() + 24 
    * 60 * 60 * 1000); 
  } 
  AlarmData ad = new AlarmData(calendar.getTimeInMillis()); 
  adapter.add(ad); 
  alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 
   ad.getTime(), 5 * 60 * 1000, PendingIntent 
    .getBroadcast(getContext(), ad.getId(), 
     new Intent(getContext(), 
      AlarmReceiver.class), 0)); 
  saveAlarmList(); 
  } 
 }, c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE), true).show(); 
 }

這里我們可以看到TPDiolog這個(gè)，當(dāng)你自己嘗試過(guò)后可能也會(huì)遇到同樣的問(wèn)題，那就是當(dāng)你通過(guò)TimePickerDialog這個(gè)系統(tǒng)的時(shí)間選擇控件的時(shí)候，點(diǎn)擊確定后，會(huì)創(chuàng)建兩條記錄，這是因?yàn)槲覀凕c(diǎn)擊確定后會(huì)調(diào)用該事件監(jiān)聽(tīng)器的時(shí)間，在關(guān)閉這個(gè)Dialog的時(shí)候也會(huì)調(diào)用一次，所以我們?cè)谶@里自己重寫(xiě)了一下該類的方法

TPDiolog.class

public class TPDiolog extends TimePickerDialog { 
 
 public TPDiolog(Context context, OnTimeSetListener callBack, int hourOfDay, 
  int minute, boolean is24HourView) { 
 super(context, callBack, hourOfDay, minute, is24HourView); 
 } 
 
 //重寫(xiě)該方法是為了避免調(diào)用兩次onTimeSet 
 @Override 
 protected void onStop() { 
 //super.onStop(); 
 } 
}

在之前的代碼中我們還看到了一個(gè)alarmManager這一對(duì)象，這是我們?yōu)榱苏{(diào)用系統(tǒng)的鬧鐘服務(wù)創(chuàng)建的實(shí)例，我們也因此而創(chuàng)建了一個(gè)AlarmReceiver.class

public class AlarmReceiver extends BroadcastReceiver { 
 
 @Override 
 public void onReceive(Context context, Intent arg1) { 
 System.out.println("鬧鐘執(zhí)行了！"); 
  
 AlarmManager am=(AlarmManager) context.getSystemService(Context.ALARM_SERVICE); 
 am.cancel(PendingIntent.getBroadcast(context, getResultCode(), new Intent(context, AlarmReceiver.class), 0)); 
  
 Intent i =new Intent(context,PlayAlarmAty.class); 
 //設(shè)置intent的啟動(dòng)模式 
 i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
 context.startActivity(i); 
 } 
 
}

一些小的地方講好了，最后把AlarmView.class的完整代碼貼上。

package com.example.clock; 
 
import java.util.Calendar; 
import java.util.Date; 
import java.util.Iterator; 
 
import android.app.AlarmManager; 
import android.app.AlertDialog; 
import android.app.PendingIntent; 
import android.app.TimePickerDialog; 
import android.app.TimePickerDialog.OnTimeSetListener; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.SharedPreferences; 
import android.content.SharedPreferences.Editor; 
import android.util.AttributeSet; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemLongClickListener; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.LinearLayout; 
import android.widget.ListView; 
import android.widget.Switch; 
import android.widget.TimePicker; 
 
public class AlarmView extends LinearLayout { 
 
 private Button btnAddAlarm; 
 private ListView lvListAlarm; 
 private ArrayAdapter<AlarmData> adapter; 
 private AlarmManager alarmManager; 
 
 public AlarmView(Context context, AttributeSet attrs, int defStyle) { 
 super(context, attrs, defStyle); 
 init(); 
 } 
 
 public AlarmView(Context context, AttributeSet attrs) { 
 super(context, attrs); 
 init(); 
 } 
 
 public AlarmView(Context context) { 
 super(context); 
 init(); 
 } 
 
 private void init() { 
 alarmManager = (AlarmManager) getContext().getSystemService( 
  Context.ALARM_SERVICE); 
 } 
 
 @Override 
 protected void onFinishInflate() { 
 super.onFinishInflate(); 
 btnAddAlarm = (Button) findViewById(R.id.btnAddAlarm); 
 lvListAlarm = (ListView) findViewById(R.id.lvListAlarm); 
 
 adapter = new ArrayAdapter<AlarmData>(getContext(), 
  android.R.layout.simple_list_item_1); 
 lvListAlarm.setAdapter(adapter); 
 
 readSaveAlarmList(); 
 // adapter.add(new AlarmData(System.currentTimeMillis())); 
 
 btnAddAlarm.setOnClickListener(new OnClickListener() { 
 
  @Override 
  public void onClick(View v) { 
  addAlarm(); 
  } 
 }); 
 // 長(zhǎng)按某項(xiàng)刪除 
 lvListAlarm.setOnItemLongClickListener(new OnItemLongClickListener() { 
 
  @Override 
  public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
   final int position, long arg3) { 
 
  new AlertDialog.Builder(getContext()) 
   .setTitle("操作選項(xiàng)") 
   .setItems(new CharSequence[] { "刪除", "刪除1" }, 
    new DialogInterface.OnClickListener() { 
 
     @Override 
     public void onClick(DialogInterface dialog, 
      int which) { 
     switch (which) { 
     case 0: 
      deleteAlarm(position); 
      break; 
 
     default: 
      break; 
     } 
     } 
    }).setNegativeButton("取消", null).show(); 
  return true; 
  } 
 }); 
 } 
 
 private void deleteAlarm(int position) { 
 AlarmData ad = adapter.getItem(position); 
 adapter.remove(ad); 
 saveAlarmList(); 
 
 alarmManager.cancel(PendingIntent.getBroadcast(getContext(), 
  ad.getId(), new Intent(getContext(), AlarmReceiver.class), 0)); 
 } 
 
 private void addAlarm() { 
 
 Calendar c = Calendar.getInstance(); 
 
 new TPDiolog(getContext(), new TimePickerDialog.OnTimeSetListener() { 
 
  @Override 
  public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 
 
  Calendar calendar = Calendar.getInstance(); 
  calendar.set(Calendar.HOUR_OF_DAY, hourOfDay); 
  calendar.set(Calendar.MINUTE, minute); 
  calendar.set(Calendar.SECOND, 0); 
  calendar.set(Calendar.MILLISECOND, 0); 
 
  Calendar currentTime = Calendar.getInstance(); 
  if (currentTime.getTimeInMillis() >= calendar.getTimeInMillis()) { 
   calendar.setTimeInMillis(calendar.getTimeInMillis() + 24 
    * 60 * 60 * 1000); 
  } 
  AlarmData ad = new AlarmData(calendar.getTimeInMillis()); 
  adapter.add(ad); 
  alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 
   ad.getTime(), 5 * 60 * 1000, PendingIntent 
    .getBroadcast(getContext(), ad.getId(), 
     new Intent(getContext(), 
      AlarmReceiver.class), 0)); 
  saveAlarmList(); 
  } 
 }, c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE), true).show(); 
 } 
 
 private static final String KEY_ALARM_LIST = "alarmlist"; 
 
 private void saveAlarmList() { 
 Editor editor = getContext().getSharedPreferences( 
  AlarmView.class.getName(), Context.MODE_PRIVATE).edit(); 
 
 StringBuffer sb = new StringBuffer(); 
 
 for (int i = 0; i < adapter.getCount(); i++) { 
  sb.append(adapter.getItem(i).getTime()).append(","); 
 } 
 if (sb.length() > 1) { 
  String content = sb.toString().substring(0, sb.length() - 1); 
  editor.putString(KEY_ALARM_LIST, content); 
 
  System.out.println(content); 
 } else { 
  editor.putString(KEY_ALARM_LIST, null); 
 } 
 editor.commit(); 
 } 
 
 private void readSaveAlarmList() { 
 SharedPreferences sp = getContext().getSharedPreferences( 
  AlarmView.class.getName(), Context.MODE_PRIVATE); 
 String content = sp.getString(KEY_ALARM_LIST, null); 
 
 if (content != null) { 
  String[] timeStrings = content.split(","); 
  for (String string : timeStrings) { 
  adapter.add(new AlarmData(Long.parseLong(string))); 
  } 
 } 
 } 
 
 // 自定義數(shù)據(jù)類型 
 private static class AlarmData { 
 private long time = 0; 
 private Calendar date; 
 private String timeLabel = ""; 
 
 public AlarmData(long time) { 
  this.time = time; 
  date = Calendar.getInstance(); 
  date.setTimeInMillis(time); 
  timeLabel = String.format("%d月%d日 %d:%d", 
   date.get(Calendar.MONTH) + 1, 
   date.get(Calendar.DAY_OF_MONTH), 
   date.get(Calendar.HOUR_OF_DAY), date.get(Calendar.MINUTE)); 
 } 
 
 public long getTime() { 
  return time; 
 } 
 
 public String getTimeLabel() { 
  return timeLabel; 
 } 
 
 public int getId() { 
  return (int) (getTime() / 1000 / 60); 
 } 
 
 @Override 
 public String toString() { 
  return getTimeLabel(); 
 } 
 
 } 
}

三、計(jì)時(shí)器
計(jì)時(shí)器的主要功能就是你先設(shè)定一個(gè)時(shí)間，然后點(diǎn)擊開(kāi)始，時(shí)間就會(huì)一秒一秒的減少，在這里我么主要用到了Timer這個(gè)系統(tǒng)的計(jì)時(shí)器，這代碼中沒(méi)有上面難懂的地方，有些地方已經(jīng)給上注釋了，所以直接貼代碼，可能有些人會(huì)不知道Timer怎么用，之后的知識(shí)點(diǎn)中都會(huì)有提到。

package com.example.clock; 
 
import java.util.Timer; 
import java.util.TimerTask; 
 
import android.R.integer; 
import android.app.AlertDialog; 
import android.content.Context; 
import android.os.Handler; 
import android.text.Editable; 
import android.text.TextUtils; 
import android.text.TextWatcher; 
import android.util.AttributeSet; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.LinearLayout; 
 
public class TimerView extends LinearLayout { 
 
 public TimerView(Context context, AttributeSet attrs) { 
 super(context, attrs); 
 } 
 
 public TimerView(Context context) { 
 super(context); 
 } 
 
 @Override 
 protected void onFinishInflate() { 
 super.onFinishInflate(); 
 
 btnStart = (Button) findViewById(R.id.btnStart); 
 btnPause = (Button) findViewById(R.id.btnPause); 
 btnResume = (Button) findViewById(R.id.btnResume); 
 btnReset = (Button) findViewById(R.id.btnReset); 
 
 btnStart.setOnClickListener(new OnClickListener() { 
 
  @Override 
  public void onClick(View v) { 
  startTimer(); 
  btnStart.setVisibility(View.GONE); 
  btnPause.setVisibility(View.VISIBLE); 
  btnReset.setVisibility(View.VISIBLE); 
  } 
 }); 
  
 btnPause.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  stopTimer(); 
  btnPause.setVisibility(View.GONE); 
  btnResume.setVisibility(View.VISIBLE); 
  } 
 }); 
  
 btnResume.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  startTimer(); 
  btnPause.setVisibility(View.VISIBLE); 
  btnResume.setVisibility(View.GONE); 
  } 
 }); 
 btnReset.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  stopTimer(); 
  etHour.setText("00"); 
  etMin.setText("00"); 
  etSec.setText("00"); 
   
  btnReset.setVisibility(View.GONE); 
  btnResume.setVisibility(View.GONE); 
  btnPause.setVisibility(View.GONE); 
  btnStart.setVisibility(View.VISIBLE); 
  } 
 }); 
 
 etHour = (EditText) findViewById(R.id.etHour); 
 etMin = (EditText) findViewById(R.id.etMin); 
 etSec = (EditText) findViewById(R.id.etSec); 
 
 etHour.setText("00"); 
 etHour.addTextChangedListener(new TextWatcher() { 
 
  @Override 
  public void onTextChanged(CharSequence s, int start, int before, 
   int count) { 
  /* 
   * 這個(gè)方法是在Text改變過(guò)程中觸發(fā)調(diào)用的， 它的意思就是說(shuō)在原有的文本s中， 
   * 從start開(kāi)始的count個(gè)字符替換長(zhǎng)度為before的舊文本， 
   * 注意這里沒(méi)有將要之類的字眼，也就是說(shuō)一句執(zhí)行了替換動(dòng)作。 
   */ 
  if (!TextUtils.isEmpty(s)) { 
 
   int value = Integer.parseInt(s.toString()); 
 
   if (value > 59) { 
   etHour.setText("59"); 
   } else if (value < 0) { 
   etHour.setText("00"); 
   } 
  } 
  checkToEnableBtnStart(); 
  } 
 
  @Override 
  public void beforeTextChanged(CharSequence s, int start, int count, 
   int after) { 
  } 
 
  @Override 
  public void afterTextChanged(Editable s) { 
  } 
 }); 
 etMin.setText("00"); 
 etMin.addTextChangedListener(new TextWatcher() { 
 
  @Override 
  public void onTextChanged(CharSequence s, int start, int before, 
   int count) { 
  if (!TextUtils.isEmpty(s)) { 
 
   int value = Integer.parseInt(s.toString()); 
 
   if (value > 59) { 
   etMin.setText("59"); 
   } else if (value < 0) { 
   etMin.setText("00"); 
   } 
  } 
  checkToEnableBtnStart(); 
  } 
 
  @Override 
  public void beforeTextChanged(CharSequence s, int start, int count, 
   int after) { 
  } 
 
  @Override 
  public void afterTextChanged(Editable s) { 
  } 
 }); 
 etSec.setText("00"); 
 etSec.addTextChangedListener(new TextWatcher() { 
 
  @Override 
  public void onTextChanged(CharSequence s, int start, int before, 
   int count) { 
  if (!TextUtils.isEmpty(s)) { 
 
   int value = Integer.parseInt(s.toString()); 
 
   if (value > 59) { 
   etSec.setText("59"); 
   } else if (value < 0) { 
   etSec.setText("00"); 
   } 
  } 
  checkToEnableBtnStart(); 
  } 
 
  @Override 
  public void beforeTextChanged(CharSequence s, int start, int count, 
   int after) { 
  } 
 
  @Override 
  public void afterTextChanged(Editable s) { 
  } 
 }); 
 
 btnStart.setVisibility(View.VISIBLE); 
 btnStart.setEnabled(false); 
 btnPause.setVisibility(View.GONE); 
 btnResume.setVisibility(View.GONE); 
 btnReset.setVisibility(View.GONE); 
 } 
 
 private void checkToEnableBtnStart() { 
 btnStart.setEnabled((!TextUtils.isEmpty(etHour.getText()) && Integer 
  .parseInt(etHour.getText().toString()) > 0) 
  || (!TextUtils.isEmpty(etMin.getText()) && Integer 
   .parseInt(etMin.getText().toString()) > 0) 
  || (!TextUtils.isEmpty(etSec.getText()) && Integer 
   .parseInt(etSec.getText().toString()) > 0)); 
 } 
 
 private void startTimer() { 
 if (timerTask == null) { 
  allTimeCount = Integer.parseInt(etHour.getText().toString()) * 60 
   * 60 + Integer.parseInt(etMin.getText().toString()) * 60 
   + Integer.parseInt(etSec.getText().toString()); 
  timerTask = new TimerTask() { 
 
  @Override 
  public void run() { 
   allTimeCount--; 
   handle.sendEmptyMessage(MSG_WHAT_TIME_TICK); 
   if (allTimeCount <= 0) { 
   handle.sendEmptyMessage(MSG_WHAT_TIME_IS_UP); 
   stopTimer(); 
   } 
  } 
  }; 
  timer.schedule(timerTask, 1000, 1000); 
 } 
 } 
 private void stopTimer(){ 
 if (timerTask!=null) { 
  timerTask.cancel(); 
  timerTask=null; 
 } 
 } 
 
 private Handler handle = new Handler(){ 
  
 public void handleMessage(android.os.Message msg) { 
  switch (msg.what) { 
  case MSG_WHAT_TIME_TICK: 
  int hour = allTimeCount/60/60; 
  int min = (allTimeCount/60)%60; 
  int sec = allTimeCount%60; 
   
  etHour.setText(hour+""); 
  etMin.setText(min+""); 
  etSec.setText(sec+""); 
  break; 
   
  case MSG_WHAT_TIME_IS_UP: 
  new AlertDialog.Builder(getContext()) 
  .setTitle("Time is up!") 
  .setMessage("Time is up!") 
  .setNegativeButton("Cancle", null).show(); 
   
  btnReset.setVisibility(View.GONE); 
  btnResume.setVisibility(View.GONE); 
  btnPause.setVisibility(View.GONE); 
  btnStart.setVisibility(View.VISIBLE); 
  break; 
 
  default: 
  break; 
  } 
 }; 
 }; 
 private static final int MSG_WHAT_TIME_IS_UP = 1; 
 private static final int MSG_WHAT_TIME_TICK = 2; 
 
 private int allTimeCount = 0; 
 private Timer timer = new Timer(); 
 private TimerTask timerTask = null; 
 private Button btnStart, btnPause, btnResume, btnReset; 
 private EditText etHour, etMin, etSec; 
 
}

四、秒表
最后的秒表相信大家都不陌生，用到的知識(shí)正好之前的三個(gè)都有講到，只要明白前三個(gè)后，這個(gè)就不難理解了。

package com.example.clock; 
 
import java.util.ArrayList; 
import java.util.Timer; 
import java.util.TimerTask; 
 
import android.content.Context; 
import android.os.Handler; 
import android.util.AttributeSet; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.LinearLayout; 
import android.widget.ListView; 
import android.widget.TextView; 
 
public class StopWatchView extends LinearLayout { 
 
 private TextView tvHour,tvMin,tvSec,tvMsec; 
 private Button btnStart,btnPause,btnResume,btnReset,btnLap; 
 private ListView lvTimeList; 
 private ArrayAdapter<String> adapter; 
 public StopWatchView(Context context, AttributeSet attrs) { 
 super(context, attrs); 
 } 
 
 @Override 
 protected void onFinishInflate() { 
 super.onFinishInflate(); 
  
 tvHour = (TextView) findViewById(R.id.timeHour); 
 tvHour.setText("0"); 
 tvMin = (TextView) findViewById(R.id.timeMin); 
 tvMin.setText("0"); 
 tvSec = (TextView) findViewById(R.id.timeSec); 
 tvSec.setText("0"); 
 tvMsec = (TextView) findViewById(R.id.timeMsec); 
 tvMsec.setText("0"); 
  
 btnStart = (Button) findViewById(R.id.btnSWStart); 
 btnPause = (Button) findViewById(R.id.btnSWPause); 
 btnResume = (Button) findViewById(R.id.btnSWResume); 
 btnLap = (Button) findViewById(R.id.btnSWLap); 
 btnReset = (Button) findViewById(R.id.btnSWReset); 
  
 btnStart.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  startTimer(); 
  btnStart.setVisibility(View.GONE); 
  btnPause.setVisibility(View.VISIBLE); 
  btnLap.setVisibility(View.VISIBLE); 
  } 
 }); 
 btnPause.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  stopTimer(); 
  btnPause.setVisibility(View.GONE); 
  btnResume.setVisibility(View.VISIBLE); 
  btnLap.setVisibility(View.GONE); 
  btnReset.setVisibility(View.VISIBLE); 
  } 
 }); 
 btnResume.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  startTimer(); 
  btnResume.setVisibility(View.GONE); 
  btnPause.setVisibility(View.VISIBLE); 
  btnLap.setVisibility(View.VISIBLE); 
  btnReset.setVisibility(View.GONE); 
  } 
 }); 
 btnReset.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  stopTimer(); 
  tenMSecs = 0; 
  adapter.clear(); 
  btnReset.setVisibility(View.GONE); 
  btnLap.setVisibility(View.GONE); 
  btnPause.setVisibility(View.GONE); 
  btnResume.setVisibility(View.GONE); 
  btnStart.setVisibility(View.VISIBLE); 
  } 
 }); 
 btnLap.setOnClickListener(new OnClickListener() { 
  
  @Override 
  public void onClick(View v) { 
  adapter.insert(String.format("%d:%d:%d.%d", tenMSecs/100/60/60,tenMSecs/100/60%60,tenMSecs/100%60,tenMSecs%100), 0); 
  } 
 }); 
 btnLap.setVisibility(View.GONE); 
 btnPause.setVisibility(View.GONE); 
 btnResume.setVisibility(View.GONE); 
 btnReset.setVisibility(View.GONE); 
  
 lvTimeList = (ListView) findViewById(R.id.lvWatchTime); 
 adapter = new ArrayAdapter<String>(getContext(), android.R.layout.simple_list_item_1); 
 lvTimeList.setAdapter(adapter); 
  
 showTimerTask = new TimerTask() { 
  
  @Override 
  public void run() { 
  handle.sendEmptyMessage(MSG_WHAT_SHOW_TIME); 
  } 
 }; 
 timer.schedule(showTimerTask, 200, 200); 
 } 
 
 private void startTimer(){ 
 if (timerTask == null) { 
  timerTask = new TimerTask() { 
   
  @Override 
  public void run() { 
   tenMSecs++; 
  } 
  }; 
  timer.schedule(timerTask, 10, 10); 
 } 
 } 
 private void stopTimer(){ 
 if (timerTask != null) { 
  timerTask.cancel(); 
  timerTask = null; 
 } 
 } 
 
 private int tenMSecs = 0; 
 private Timer timer =new Timer(); 
 private TimerTask timerTask = null; 
 private TimerTask showTimerTask = null; 
 private static final int MSG_WHAT_SHOW_TIME = 1; 
 
 private Handler handle = new Handler(){ 
 public void handleMessage(android.os.Message msg) { 
  switch (msg.what) { 
  case MSG_WHAT_SHOW_TIME: 
  tvHour.setText(tenMSecs/100/60/60+""); 
  tvMin.setText(tenMSecs/100/60%60+""); 
  tvSec.setText(tenMSecs/100%60+""); 
  tvMsec.setText(tenMSecs%100+""); 
  break; 
 
  default: 
  break; 
  } 
 }; 
 }; 
 public void onDestroy() { 
 timer.cancel(); 
 } 
 
}

到此為止，自己的第一個(gè)實(shí)戰(zhàn)算是完成了，但是就是界面很low，這個(gè)只是把基本的功能實(shí)現(xiàn)了，但是在界面上沒(méi)有做很大的完善，在之后的實(shí)戰(zhàn)中會(huì)慢慢改進(jìn)的。

源碼下載：Android多功能時(shí)鐘

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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