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：

android:name=".AlarmReceiver"

android:process=":remote">

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。