手机当中肯定是有闹钟的，这是不用说的，要不然就不是手机了。对吧。
下面我根据广播的方式写了一个闹钟，大家请看图：

        
                
  1. 下面让我们看一下原代码的是如何写的，
    2.             
  2. packagecom.smart;
    3.             
    4.             
  4. importjava.util.Calendar;
    5.             
    6.             
  6. importandroid.app.Activity;
    7.             
  7. importandroid.content.BroadcastReceiver;
    8.             
  8. importandroid.content.Context;
    9.             
  9. importandroid.content.Intent;
    10.             
  10. importandroid.content.SharedPreferences;
    11.             
  11. importandroid.media.MediaPlayer;
    12.             
    13.             
  13. publicclassAlarmReceiverextendsBroadcastReceiver{
    14.             
  14. /**
    15.             
  15. *通过广播进行扫描，是否到达时间后再响起闹铃
    16.             
  16. *
    17.             
  17. **/
    18.             
  18. @Override
    19.             
  19. publicvoidonReceive(Contextcontext,Intentintent){
    20.             
    21.             
    22.             
  22. SharedPreferencessharedPreferences=context.getSharedPreferences("alarm_record",Activity.MODE_PRIVATE);
    23.             
  23. Stringhour=String.valueOf(Calendar.getInstance().get(Calendar.HOUR_OF_DAY));
    24.             
  24. Stringminute=String.valueOf(Calendar.getInstance().get(Calendar.MINUTE));
    25.             
  25. Stringtime=sharedPreferences.getString(hour+":"+minute,null);//小时与分，
    26.             
    27.             
  27. if(time!=null){//判断是否为空，然后通过创建，
    28.             
  28. MediaPlayermediaPlayer=MediaPlayer.create(context,R.raw.llb);
    29.             
  29. mediaPlayer.start();//开始
    30.             
  30. }
    31.             
    32.             
  32. }
    33.             
    34.             
  34. }
    35.             
  35. packagecom.smart;
    36.             
    37.             
  37. importandroid.app.Activity;
    38.             
  38. importandroid.app.AlarmManager;
    39.             
  39. importandroid.app.AlertDialog;
    40.             
  40. importandroid.app.PendingIntent;
    41.             
  41. importandroid.content.Context;
    42.             
  42. importandroid.content.DialogInterface;
    43.             
  43. importandroid.content.Intent;
    44.             
  44. importandroid.content.SharedPreferences;
    45.             
  45. importandroid.os.Bundle;
    46.             
  46. importandroid.view.View;
    47.             
  47. importandroid.view.View.OnClickListener;
    48.             
  48. importandroid.widget.Button;
    49.             
  49. importandroid.widget.TextView;
    50.             
  50. importandroid.widget.TimePicker;
    51.             
    52.             
  52. publicclassMainextendsActivityimplementsOnClickListener{
    53.             
    54.             
  54. privateTextViewalarmRecord;
    55.             
  55. privateSharedPreferencessharedPreferences;
    56.             
    57.             
    58.             
  58. @Override
    59.             
  59. publicvoidonCreate(BundlesavedInstanceState){
    60.             
  60. super.onCreate(savedInstanceState);
    61.             
  61. setContentView(R.layout.main);
    62.             
  62. ButtonaddAlarm=(Button)findViewById(R.id.addAlarm);
    63.             
  63. alarmRecord=(TextView)findViewById(R.id.alarmRecord);
    64.             
  64. addAlarm.setOnClickListener(this);
    65.             
  65. sharedPreferences=getSharedPreferences("alarm_record",Activity.MODE_PRIVATE);
    66.             
  66. AlarmManageraManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
    67.             
  67. Intentintent=newIntent(this,AlarmReceiver.class);
    68.             
  68. PendingIntentpendingIntent=PendingIntent.getBroadcast(this,0,intent,0);
    69.             
  69. aManager.setRepeating(AlarmManager.RTC,0,60*1000,pendingIntent);
    70.             
    71.             
  71. }
    72.             
    73.             
    74.             
  74. @Override
    75.             
  75. publicvoidonClick(Viewv){
    76.             
  76. Viewview=getLayoutInflater().inflate(R.layout.llb,null);//
    77.             
  77. finalTimePickertimePicker=(TimePicker)view.findViewById(R.id.timepicker);
    78.             
  78. timePicker.setIs24HourView(true);//
    79.             
  79. newAlertDialog.Builder(this).setTitle("设置闹铃时间").setView(view).setPositiveButton("确定",newDialogInterface.OnClickListener(){
    80.             
  80. //设置标题
    81.             
  81. @Override
    82.             
  82. publicvoidonClick(DialogInterfacedialog,intwhich){
    83.             
  83. //按钮事件触发方法
    84.             
  84. StringtimeStr=String.valueOf(timePicker.getCurrentHour())+":"+String.valueOf(timePicker.getCurrentMinute());
    85.             
  85. alarmRecord.setText(alarmRecord.getText().toString()+"\n"+timeStr);
    86.             
  86. sharedPreferences.edit().putString(timeStr,timeStr).commit();
    87.             
    88.             
  88. }
    89.             
  89. }).setNegativeButton("取消",null).show();
    90.             
    91.             
    92.             
    93.             
    94.             
    95.             
    96.             
    97.             
    98.             
  98. }
    99.             
  99. }
    100.

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