Android：闹钟提醒结合通知（alarm+notification）

Android的Notification是android系统中很重要的一个机制， 产品人员常常利用通知栏的方式，跟用户进行弱沟通。拥有推送通知的app要比没有此类功能的app活跃率要高很多。另外类似于墨迹天气，清理大师等app，也会将通知栏常驻，利用自定义的布局，方便用户及时快捷的查看所需的信息和使用快捷的功能。所以Notification的使用，也在开发当中， 使用的越来越频繁。今天我就跟大家完成这个小demo。

流程：设定时间>利用AlarmManager（闹钟管理器）通知PendingIntent跳转到指定的activity，实现闹铃跟通知。

代码如下：

activity_main.xml(设定何时通知):

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:orientation="vertical"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.android28_alarm_notification.MainActivity">


    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="闹钟一次"
        android:onClick="oneAlarm"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="周期闹钟"
        android:onClick="periodAlarm"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="关闭周期闹钟"
        android:onClick="closeAlarm"
        />

LinearLayout>

---

activity_ring.xml（闹钟的页面）：

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:orientation="vertical"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.android28_alarm_notification.MainActivity">


    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="闹钟一次"
        android:onClick="oneAlarm"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="周期闹钟"
        android:onClick="periodAlarm"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="关闭周期闹钟"
        android:onClick="closeAlarm"
        />

LinearLayout>

---

MainActivity.java

package com.example.android28_alarm_notification;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TimePicker;

import java.util.Calendar;

import static android.icu.lang.UCharacter.GraphemeClusterBreak.T;

public class MainActivity extends AppCompatActivity {

    private AlarmManager alarmManager;
    private PendingIntent pi;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //得到闹钟管理器
        alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
    }


    //开启单此闹钟
    public void oneAlarm(View view){

        //获得当前系统的小时跟分
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);//得到小时
        final int minue=calendar.get(Calendar.MINUTE);//得到分钟
        Log.i("test",hour+"....."+minue);
        //弹出世间对话框
        TimePickerDialog tpd=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                Calendar calendar=Calendar.getInstance();
                calendar.set(Calendar.HOUR_OF_DAY,hourOfDay);
                calendar.set(Calendar.MINUTE,minue);
                Intent intent=new Intent();
                intent.setAction("com.example.android28_alarm_notification.RING");
                PendingIntent pi=PendingIntent.getBroadcast(MainActivity.this,0x105,intent,0);
                //时间一到
                alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),pi);
            }
        },hour,minue,true);
        tpd.show();//显示窗口
    }

    //开启周期闹钟
    public void periodAlarm(View view){

        //获得当前系统的小时跟分
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);//得到小时
        final int minue=calendar.get(Calendar.MINUTE);//得到分钟

        //弹出世间对话框
        TimePickerDialog tpd=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                Calendar calendar=Calendar.getInstance();
                calendar.set(Calendar.HOUR_OF_DAY,hourOfDay);
                calendar.set(Calendar.MINUTE,minue);
                Intent intent=new Intent();
                intent.setAction("com.example.android28_alarm_notification.RING");
                pi = PendingIntent.getBroadcast(MainActivity.this,0x102,intent,0);
                //时间一到
                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),60*60*24*1000, pi);
            }
        },hour,minue,true);
        tpd.show();//显示窗口
    }
    //关闭周期闹钟
    public void closeAlarm(View view){
        alarmManager.cancel(pi);//取消周期的闹钟
    }
}

RingActivity.java:

package com.example.android28_alarm_notification;

import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.NotificationCompat;
import android.view.View;

import static android.R.attr.x;

public class RingActivity extends AppCompatActivity {

    private MediaPlayer mp;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ring);
        mp = MediaPlayer.create(this, R.raw.bow);
        mp.start();
        //实例化管理
        final   NotificationManager nm= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        //实例化通知
        final   NotificationCompat.Builder nc=new NotificationCompat.Builder(this);
        //默认哪些特色提示
        nc.setDefaults(NotificationCompat.DEFAULT_ALL);
        //通知标题
        nc.setContentTitle("下载");
        //设置通知图片
        nc.setSmallIcon(android.R.drawable.ic_lock_idle_alarm);
        //通知内容
        nc.setContentText("下载中...");
        //得到build
        Notification notification=nc.build();
        //发送通知
        nm.notify(0x110,notification);
        //增加一个进度条
        nc.setProgress(100,0,false);//初始为0
        //给一个子线程
        new Thread(){
            @Override
            public void run() {
                super.run();
                //设置不可删除通知
//                nc.build().flags=Notification.FLAG_ONGOING_EVENT;
                 for (int i=1;i<=100;i++){
                     nc.setProgress(100,i,false);
                     nm.notify(0x110,nc.build());
                     nc.setContentText("下载："+i+"%");
                     try {
                         //模拟下载
                         Thread.sleep(100);
                     } catch (InterruptedException e) {
                         e.printStackTrace();
                     }
                 }
                //下载完成后更改标题以及提示信息
                nc.setContentTitle("开始安装");
                nc.setContentText("安装中...");
                //设置进度为不确定，用于模拟安装
                nc.setProgress(0,0,true);
                nc.build().flags=Notification.FLAG_NO_CLEAR;
                nm.notify(0x110,nc.build());
            }
        }.start();
    }



    //关闭闹钟
    public void stop(View view){
        mp.stop();
        finish();//干掉自己
    }

}

---

#####因为这边我用的是广播通知跳转的activity，所以我这里还有一个静态的广播接收者

package com.example.android28_alarm_notification;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

import static android.transition.Fade.IN;

/**
 * Created by Administrator on 2017/2/22.
 */

public class RingReceiver extends BroadcastReceiver {


    @Override
    public void onReceive(Context context, Intent intent1) {
        if("com.example.android28_alarm_notification.RING".equals(intent1.getAction())){
          Log.i("test","收到广播了");
            Intent intent=new Intent(context,RingActivity.class);
            //广播跳activity必须设置标志位
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);//新的栈
            context.startActivity(intent);
        }
    }
}

---

清单文件 AndroidManifest.xml：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android28_alarm_notification">

       
        <uses-permission android:name="android.permission.VIBRATE">uses-permission>
      
       <uses-permission android:name="android.permission.FLASHLIGHT">uses-permission>

    <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=".RingReceiver">
            <intent-filter>
                <action android:name="com.example.android28_alarm_notification.RING" />
            intent-filter>
        receiver>
        <activity android:name=".RingActivity">activity>
    application>

manifest>