Android实现闹钟，通过AlarmManager+BroadcastReceiver（广播）

以下是我利用AlarmManager+BroadcastReceiver实现闹钟的功能，以及通过广播来实现通知，这里我的闹铃是存放在内存raw中，并不需要在清单文件中获取权限

activity_main.xml

<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.myapp.MainActivity">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="设置闹钟(一次)"
        android:onClick="setAlarmOne"
        />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="setAlarmCycle"
        android:text="设置闹钟(周期)" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="取消周期闹钟"
        android:onClick="cancelAlarmCycle"
        />
LinearLayout>

MainActivity.java

package com.example.myapp;

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.view.View;
import android.widget.TimePicker;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

    private PendingIntent pendingIntent;
    private AlarmManager alarmManager;

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

    }

    //设置闹钟(一次)
    public void setAlarmOne(View view){
        //获取系统当前时间
        //获取当前系统的时间
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);
        int minute=calendar.get(Calendar.MINUTE);
        //弹出时间对话框
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            //2 确定选择好的时间 hourOfDay   minut
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,hourOfDay);
                c.set(Calendar.MINUTE,minute);

                //04.时间一到，执行相对应的操作
                Intent  intent=new Intent();
                intent.setAction("com.example.myapp.RING");
                PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0x101,intent,0);

                //03.设置闹钟
                alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
                  }
        },hour,minute,true);
        timePickerDialog.show();

    }
    //设置闹钟(周期)
    public void setAlarmCycle(View view){
        //获取当前系统的时间
        Calendar calendar=Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);
        int minute=calendar.get(Calendar.MINUTE);


        //01.弹出时间对话框（选择时间）
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker timePicker, int i, int i1) {
                //02.确定选择好的时间  i  i1
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,i);
                c.set(Calendar.MINUTE,i1);

                //04.时间一到，执行相对应的操作
                Intent  intent=new Intent();
                intent.setAction("com.example.myapp.RING");
                pendingIntent = PendingIntent.getBroadcast(MainActivity.this,0x102,intent,0);

                //03.设置闹钟(周期)
                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);
            }
        },hour,minute,true);
        timePickerDialog.show();
    }

    ///取消闹钟
    public void cancelAlarmCycle(View view){
        alarmManager.cancel(pendingIntent);
    }


}

activity_ring.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_ring"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.myapp.RingActivity">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="you are my love!!!"
        android:textSize="30sp"
        />
    <AnalogClock
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/analogClock" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="停止"
        android:onClick="stop"
        />
LinearLayout>

RingActivity.java

package com.example.myapp;

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;

public class RingActivity extends AppCompatActivity {

    private MediaPlayer mediaPlayer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ring);
        //播放音乐
        mediaPlayer = MediaPlayer.create(this, R.raw.yang);
        mediaPlayer.start();
        //实例化通知管理器
        NotificationManager notificationManager=(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        //实例化通知
        NotificationCompat.Builder builder=new NotificationCompat.Builder(this);
        builder.setDefaults(NotificationCompat.DEFAULT_ALL);
        builder.setContentTitle("闹钟响了");
        builder.setSmallIcon(android.R.drawable.ic_lock_idle_alarm);
        builder.setContentText("记得在早上9点之前吃早餐哦");
        Notification notification=builder.build();
        //发送通知
        notificationManager.notify(0x103,notification);
    }

    public void stop(View view){
        mediaPlayer.stop();
        finish();
    }
}

广播
RingReceived.java

package com.example.myapp;

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

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

public class RingReceived extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if ("com.example.myapp.RING".equals(intent.getAction())){
            Log.i("test","闹钟响了");
            //跳转到Activity
            Intent intent1=new Intent(context,RingActivity.class);
            //广播跳转到activity.必须给intent设置标志位flags

            intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent1);

        }
    }
}

注意音乐时放在raw中