android 设置闹铃 安卓怎么设闹铃

写代码挺费时间的，懒得写，我就说说思路，你建一个类继承子BroadcastReceiver,复写onReceive方法，在里面写监听系统时间的代码用于跟你闹钟设置时间进行匹配，当匹配上时，创建MediaPlayer对象，播放你要播放的音乐，音乐文件可以放在Res/raw目录下，也可是在SD卡中，使用不同的方法即可。设闹钟的Activity找找例子，写出来应该不难。

在Android中可以通过AlarmManager 来实现闹钟，AlarmManager类是专门用来设定在某个指定的时间去完成指定的事件。AlarmManager 提供了访问系统警报的服务，只要在程序中设置了警报服务，AlarmManager 就会通过onReceive()方法去执行这些事件，就算系统处于待机状态，同样不会影响运行。可以通过 Context.getSystemService 方法来获得该服务。 AlarmManager 中的方法很少。如下所示

AlarmManager 的方法

方法 说明

cancel 取消AlarmManager服务

set 设置AlarmManager服务

setInexactRepeating 设置不精确周期

setRepeating 设置精确周期

setTimeZone 设置时区

要实现闹钟，首先需要创建一个继承自 BroadcastReceiver 的类，实现 onReceive 方法来接收这个Alarm服务，然后通过建立Intent 和 PendingIntent连接来调用 Alarm组件。当我们点击“设置闹钟”按钮时，通过 TimePickerDialog 来设置时间，当时间到我们指定的时间后onReceive 方法接收Alarm服务 运行效果见下图

设置闹钟时间

时间到后的Toast提示

首先看看我们实现的接收 Alarm 服务的 AlarmReceiver类，很简单，就是在收到消息后用一个 Toast 来提示用户，代码如下：

Java代码

1. packagecom.yarin.android.Examples_07_07; 
2. 
3. importandroid.content.BroadcastReceiver;  
4. importandroid.content.Context;  
5. importandroid.content.Intent;  
6. importandroid.widget.Toast;  
7. 
8. publicclassAlarmReceiverextendsBroadcastReceiver{  
9. publicvoidonReceive(Contextcontext,Intentintent){  
10. "你设置的闹钟时间到了",Toast.LENGTH_LONG).show();  
11. } 
12. }

package com.yarin.android.Examples_07_07; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.widget.Toast; public class AlarmReceiver extends BroadcastReceiver { public void onReceive(Context context, Intent intent) { Toast.makeText(context, "你设置的闹钟时间到了", Toast.LENGTH_LONG).show(); } }

由于使用了 BroadcastReceiver 服务，因此需要在 AndroidManifest.xml中进行声明，代码如下：

Xml代码

1. <receiverandroid:name=".AlarmReceiver"android:process=":remote"/>
 <receiver android:name=".AlarmReceiver" android:process=":remote" />

然后就只需要对"设置闹钟"、"取消闹钟" 的事件进行监听了，代码如下：

Java代码

1. packagecom.yarin.android.Examples_07_07; 
2. 
3. importjava.util.Calendar;  
4. 
5. importandroid.app.Activity;  
6. importandroid.app.AlarmManager;  
7. importandroid.app.PendingIntent;  
8. importandroid.app.TimePickerDialog;  
9. importandroid.content.Intent;  
10. importandroid.os.Bundle;  
11. importandroid.view.View;  
12. importandroid.widget.Button;  
13. importandroid.widget.TextView;  
14. importandroid.widget.TimePicker;  
15. 
16. publicclassActivity01extendsActivity{  
17. ButtonmButton1; 
18. ButtonmButton2; 
19. 
20. TextViewmTextView; 
21. 
22. Calendarcalendar; 
23. 
24. /**Calledwhentheactivityisfirstcreated.*/
25. @Override
26. publicvoidonCreate(BundlesavedInstanceState){  
27. super.onCreate(savedInstanceState);  
28. 
29. setContentView(R.layout.main); 
30. calendar=Calendar.getInstance(); 
31. 
32. mTextView=(TextView)findViewById(R.id.TextView01); 
33. mButton1=(Button)findViewById(R.id.Button01); 
34. mButton2=(Button)findViewById(R.id.Button02); 
35. 
36. newView.OnClickListener(){  
37. publicvoidonClick(Viewv){  
38. calendar.setTimeInMillis(System.currentTimeMillis()); 
39. intmHour=calendar.get(Calendar.HOUR_OF_DAY);  
40. intmMinute=calendar.get(Calendar.MINUTE);  
41. newTimePickerDialog(Activity01.this,  
42. newTimePickerDialog.OnTimeSetListener(){  
43. publicvoidonTimeSet(TimePickerview,  
44. inthourOfDay,intminute){  
45. calendar.setTimeInMillis(System 
46. .currentTimeMillis()); 
47. calendar.set(Calendar.HOUR_OF_DAY,hourOfDay); 
48. calendar.set(Calendar.MINUTE,minute); 
49. 0);  
50. 0);  
51. /*建立Intent和PendingIntent，来调用目标组件*/
52. newIntent(Activity01.this,  
53. class);  
54. PendingIntentpendingIntent=PendingIntent 
55. this,0,  
56. 0);  
57. AlarmManageram; 
58. /*获取闹钟管理的实例*/
59. am=(AlarmManager)getSystemService(ALARM_SERVICE); 
60. /*设置闹钟*/
61. am.set(AlarmManager.RTC_WAKEUP,calendar 
62. .getTimeInMillis(),pendingIntent); 
63. /*设置周期闹*/
64. am.setRepeating(AlarmManager.RTC_WAKEUP,System 
65. .currentTimeMillis() 
66. 10*1000),(24*60*60*1000),  
67. pendingIntent); 
68. "设置闹钟时间为"+format(hourOfDay)  
69. ":"+format(minute);  
70. mTextView.setText(tmpS); 
71. } 
72. true).show();  
73. } 
74. }); 
75. 
76. newView.OnClickListener(){  
77. publicvoidonClick(Viewv){  
78. newIntent(Activity01.this,AlarmReceiver.class);  
79. PendingIntentpendingIntent=PendingIntent.getBroadcast( 
80. this,0,intent,0);  
81. AlarmManageram; 
82. /*获取闹钟管理的实例*/
83. am=(AlarmManager)getSystemService(ALARM_SERVICE); 
84. /*取消*/
85. am.cancel(pendingIntent); 
86. "闹钟已取消！");  
87. } 
88. }); 
89. } 
90. 
91. /*格式化字符串(7:3->07:03)*/
92. privateStringformat(intx){  
93. ""+x;  
94. if(s.length()==1)  
95. "0"+s;  
96. returns;  
97. } 
98. }

package com.yarin.android.Examples_07_07; import java.util.Calendar; import android.app.Activity; import android.app.AlarmManager; import android.app.PendingIntent; import android.app.TimePickerDialog; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.TimePicker; public class Activity01 extends Activity { Button mButton1; Button mButton2; TextView mTextView; Calendar calendar; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); calendar = Calendar.getInstance(); mTextView = (TextView) findViewById(R.id.TextView01); mButton1 = (Button) findViewById(R.id.Button01); mButton2 = (Button) findViewById(R.id.Button02); mButton1.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { calendar.setTimeInMillis(System.currentTimeMillis()); int mHour = calendar.get(Calendar.HOUR_OF_DAY); int mMinute = calendar.get(Calendar.MINUTE); new TimePickerDialog(Activity01.this, new TimePickerDialog.OnTimeSetListener() { public void onTimeSet(TimePicker view, int hourOfDay, int minute) { calendar.setTimeInMillis(System .currentTimeMillis()); calendar.set(Calendar.HOUR_OF_DAY, hourOfDay); calendar.set(Calendar.MINUTE, minute); calendar.set(Calendar.SECOND, 0); calendar.set(Calendar.MILLISECOND, 0); /* 建立Intent和PendingIntent，来调用目标组件 */ Intent intent = new Intent(Activity01.this, AlarmReceiver.class); PendingIntent pendingIntent = PendingIntent .getBroadcast(Activity01.this, 0, intent, 0); AlarmManager am; /* 获取闹钟管理的实例 */ am = (AlarmManager) getSystemService(ALARM_SERVICE); /* 设置闹钟 */ am.set(AlarmManager.RTC_WAKEUP, calendar .getTimeInMillis(), pendingIntent); /* 设置周期闹 */ am.setRepeating(AlarmManager.RTC_WAKEUP, System .currentTimeMillis() + (10 * 1000), (24 * 60 * 60 * 1000), pendingIntent); String tmpS = "设置闹钟时间为" + format(hourOfDay) + ":" + format(minute); mTextView.setText(tmpS); } }, mHour, mMinute, true).show(); } }); mButton2.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(Activity01.this, AlarmReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast( Activity01.this, 0, intent, 0); AlarmManager am; /* 获取闹钟管理的实例 */ am = (AlarmManager) getSystemService(ALARM_SERVICE); /* 取消 */ am.cancel(pendingIntent); mTextView.setText("闹钟已取消！"); } }); } /* 格式化字符串(7:3->07:03) */ private String format(int x) { String s = "" + x; if (s.length() == 1) s = "0" + s; return s; } }