Android中AlarmManager使用示例（持续更新，关于时间的设置已经更改）

现在普遍的手机都会有一个闹钟的功能，如果使用Android来实现一个闹钟可以使用AtarmManager来实现。AtarmManager提供了一种系统级的提示服务，允许你安排在将来的某个时间执行一个服务。AlarmManager对象一般不直接实例化，而是通过Context.getsystemservice(Context.ALARM_SERVICE）方法获得。

下面是我们运用之前用到的TimePickerDialog结合AlarmManager，实现一个可以设定任意时间而且可以重复的闹钟，演示效果如下（大概每晚23:48会有闹钟通知）：

layout中activity_main.xml布局文件代码：

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.administrator.alarmdemo.MainActivity">    <TextView        android:id="@+id/time_tv"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="请设置闹铃时间"        android:clickable="true"        android:onClick="setTime"        android:gravity="center"/>    <TextView        android:id="@+id/time_tv2"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="请设置响铃间隔时间"        android:clickable="true"        android:onClick="setIntervalTime"        android:gravity="center"/>    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="open"        android:text="开启闹钟"/>    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="stop"        android:text="结束闹钟"/></LinearLayout>

AndroidMainfest.xml配置文件（添加自定义重复闹铃receiver）：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.administrator.alarmdemo">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <receiver            android:name=".RepeatAlarmReceiver"            android:enabled="true"            android:exported="true">            <intent-filter>                <action android:name="repeatAlarm" />            </intent-filter>        </receiver>        <activity android:name=".Main2Activity"></activity>    </application></manifest>

RepeatAlarmReceiver.java广播接收文件：

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class RepeatAlarmReceiver extends BroadcastReceiver {    public RepeatAlarmReceiver() {    }    @Override    public void onReceive(Context context, Intent intent) {        Toast.makeText(context, "重复闹钟", Toast.LENGTH_SHORT).show();    }}

MainActivity.java代码实现：

import android.app.AlarmManager;import android.app.PendingIntent;import android.app.TimePickerDialog;import android.content.Intent;import android.provider.Settings;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.TextView;import android.widget.TimePicker;import java.util.Calendar;public class MainActivity extends AppCompatActivity {    AlarmManager alarmManagerSet;    PendingIntent pendingIntentSet;    int myHour,myMinute;//声明响铃时间    int intervalHour,intervalMinute,intervalSecond;//声明间隔时间（响铃周期）    Calendar calendar;//声明日历    TextView time_tv,time_tv2;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);alarmManagerSet= (AlarmManager) getSystemService(ALARM_SERVICE);//设置声明时间格式        calendar = Calendar.getInstance();        myHour=calendar.get(Calendar.HOUR_OF_DAY);        myMinute=calendar.get(Calendar.MINUTE);        intervalHour=calendar.get(Calendar.HOUR_OF_DAY);        intervalMinute=calendar.get(Calendar.MINUTE);//获取时间设置的TextView        time_tv= (TextView) findViewById(R.id.time_tv);        time_tv2= (TextView) findViewById(R.id.time_tv2);    }//使用timePickerDialog设置闹铃响铃时间    public void setTime(View view){        TimePickerDialog timePickerDialog =new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {            @Override            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {                myHour=hourOfDay;                myMinute=minute;                time_tv.setText(myHour+":"+myMinute);            }        },myHour,myMinute,true);        timePickerDialog.show();    }//使用timePickerDialog设置闹铃响铃周期（间隔）    public void setIntervalTime(View view){        TimePickerDialog timePickerDialog =new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {            @Override            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {                intervalHour=hourOfDay;                intervalMinute=minute;                time_tv2.setText(intervalHour+":"+intervalMinute);            }        },intervalHour,intervalMinute,true);        timePickerDialog.show();    }    public void open(View view){//分别获取闹铃响铃时间以及闹铃间隔时间（用冒号分割存储于数组中）        String[] triggerTime=time_tv.getText().toString().split(":"); String[] intervalTime=time_tv2.getText().toString().split(":");//通过Calendar分别获取对应的小时和分钟（需要将String转换为int）        Calendar calendar1 = Calendar.getInstance();        calendar1.set(Calendar.HOUR_OF_DAY,Integer.parseInt(triggerTime[0]));calendar1.set(Calendar.MINUTE,Integer.parseInt(triggerTime[1]));//得到点击触发的毫秒值（即闹钟提醒时间）        long triggerAtMillis= calendar1.getTimeInMillis();        //设定pendinngIntent接受自定义闹铃广播pendingIntentSet = PendingIntent.getBroadcast(this,0,new Intent("repeatAlarm"),0);//判断如果当前系统时间大于设置的闹铃时间，则在第二天开始启用该闹铃if(System.currentTimeMillis()>triggerAtMillis){            triggerAtMillis=triggerAtMillis+24*60*60*1000;        }//使用.setRepeating设置重复闹铃        alarmManagerSet.setRepeating(AlarmManager.RTC_WAKEUP,triggerAtMillis,intervalMillis,pendingIntentSet);    }    public void stop(View v){        alarmManagerSet.cancel(pendingIntentSet);    }}