本文实例讲述了Android编程闹钟设置方法。分享给大家供大家参考，具体如下：

闹钟在生活中最常见了，在Android中可以通过AlarmManager来实现闹钟，AlarmManager类专门用来设置在某个指定的时间去完成指定的时间。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中的方法不少，如下：

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	设置重复周期
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方法来接受这个Alarm服务，然后通过建立Intent和PendingIntent连接来调用Alarm组件。通过TimerPickerDialog来设置闹铃时间，当时间到了我们指定的时间后onReceiver方法接受到Alarm服务后的界面。

首先实现接受Alarm服务的AlarmReceiver类，用Toast类提示用户

public class AlarmReceiver extends BroadcastReceiver { @Override public void onReceive(Context arg0, Intent arg1) { // TODO Auto-generated method stub Toast.makeText(arg0, "你设置的闹铃时间到了", Toast.LENGTH_LONG).show(); } }

由于使用了BroadcastReceiver服务，因此需要再AndroidManifest.xml中进行声明：

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

然后需要设置闹铃和取消闹铃的时间进行监听：

package cn.edu.pku; 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 AlarmActivity extends Activity { /** Called when the activity is first created. */ Button mButton1; Button mButton2; TextView mTextView; Calendar calendar; @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) { // TODO Auto-generated method stub calendar.setTimeInMillis(System.currentTimeMillis()); int hour = calendar.get(Calendar.HOUR_OF_DAY); int minute = calendar.get(Calendar.MINUTE); new TimePickerDialog(AlarmActivity.this, new TimePickerDialog.OnTimeSetListener() { public void onTimeSet(TimePicker view, int hourOfDay, int minute) { // TODO Auto-generated method stub 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); Intent intent = new Intent(AlarmActivity.this, AlarmReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(AlarmActivity.this, 0, intent, 0); AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE); alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent); alarmManager.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); } }, hour, minute, true).show(); } }); mButton2.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub Intent intent = new Intent(AlarmActivity.this, AlarmReceiver.class); PendingIntent pendingIntent = PendingIntent.getBroadcast(AlarmActivity.this, 0, intent, 0); AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE); alarmManager.cancel(pendingIntent); mTextView.setText("闹铃已取消！"); } }); } private String format(int time){ String str = "" + time; if(str.length() == 1){ str = "0" + str; } return str; } }

效果如下：

设置闹铃

现在时间到设置闹铃的时间：

取消闹铃：

希望本文所述对大家Android程序设计有所帮助。