Android中的闹钟与通知(附Demo)

闹钟

闹钟管理器Alarm Manager

可以使用闹钟管理器触发事件，这些事件可以在特定的时刻或以固定的时间间隔发生
获得闹钟管理器：AlarmManager am=(AlarmManager)this.getSystemService(Caontext.ALARM_SERVICE)

设置周期闹钟

am.setRepeating(int type,Long triggerAMillis,时间间隔,PendingIntent operation)

取消周期闹钟

am.cancel(operation)

通知

Notification

显示在手机状态栏的通知

API

setDefaults():设置通知LED灯，音乐，震动等
setSound(Uri.parse(“file://sdcard/音乐.mp3”)):设置自定义音乐
setAutoCancel():设置点击通知后，状态栏自动删除通知
setContentTitle:设置通知标题
setSmallIcon():设置通知小图标
setLargeIcon():设置通知大图标
setTick():设置通知在状态栏的提示文本
setContentIntent():设置点击通知后将要启动的程序组件对应的PendingIntent

使用Notification步骤

• 得到通知管理者

NotificationManager
magener=(NotificationManager)getSystemService(NOTIFUCATION_SERVICE)

• 创建Notification

Notification notification=new Notification.Builder(this);

• 为Notification设置各种属性
• 通过通知管理者(NotificationManeger)发送通知(Notification)

notificationManager.notify(0x101,notification);

• 删除通知

manager.cancel(NOTIFICATION_ID)

权限

使用手机的震动，闪光灯需要添加权限
<1>震动权限:

<user-permission android:name="android.permission.VIBRATE">

<2>闪光灯权限:

<user-permission android:name="android.permission.FLASHLIGHT">

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下面附上Demo
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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.example.zy_alarm_notification.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:text="设置闹钟(周期)"
        android:onClick="setAlarmCycle"
        />
    <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

public class MainActivity extends AppCompatActivity {
    private AlarmManager alarmManager;
    private PendingIntent pendingIntent;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取闹钟管理者
        alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    }
    public void setAlarmOne(View view){
        //获取系统当前时间
        Calendar calendar = Calendar.getInstance();
        int hour=calendar.get(Calendar.HOUR_OF_DAY);
        int minute = calendar.get(Calendar.MINUTE);
        //01弹出对话框
        TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,hourOfDay);
                c.set(Calendar.MINUTE,minute);
                //04.当之间一到，将执行的响应
                Intent intent=new Intent();
                intent.setAction("com.example.zy_alarm_notification.Ring");
                PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0x101,intent,0);
                alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
            }
        },hour,minute,true);
        timePickerDialog.show();
    }
    public void setAlarmCycle(View view){
        //获取当前系统时间
        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
        TimePickerDialog timePickerDialog=new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker timePicker, int i, int i1) {
                Calendar c=Calendar.getInstance();
                c.set(Calendar.HOUR_OF_DAY,i);
                c.set(Calendar.MINUTE,i1);
                //02.确定好选择的时间
                //03.设置闹钟

                //04.当之间一到，将执行的响应
                Intent intent=new Intent();
                intent.setAction("com.zking.g150831_android28_alarm_notification.RING");
                pendingIntent = PendingIntent.getBroadcast(MainActivity.this,0x102,intent,0);
                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);
            }
        },hour,minute,true);
        timePickerDialog.show();
    }

    public void cancelAlarmCycle(View view){
        alarmManager.cancel(pendingIntent);
    }
}

RingReceived.java

public class RingReceived extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        if("com.example.zy_alarm_notification.Ring".equals(intent.getAction())){
            Log.i("test1","收到广播了");
            //跳转到Activity
            Intent intent1=new Intent(context,RingActivity.class);
            //给Intent设置标志位Flag
            intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent1);
        }
    }
}

RingActivity

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.nqmm);
        mediaPlayer.start();

        //显示通知栏
        NotificationCompat.Builder notificationCompat=new NotificationCompat.Builder(this);
        //设置参数
        notificationCompat.setDefaults(NotificationCompat.DEFAULT_ALL);
        notificationCompat.setContentTitle("提醒");
        notificationCompat.setContentText("一大波僵尸正在门口");
        notificationCompat.setSmallIcon(android.R.drawable.ic_lock_idle_alarm);
        Notification notification=notificationCompat.build();


        //通知管理器
        NotificationManager notificationManager= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        //发送通知
        notificationManager.notify(0x101,notification);

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

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:paddingBottom="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.zy_alarm_notification.RingActivity">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="懒PIG，该起床了"
        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="关闭"
        android:onClick="close"
        />
LinearLayout>

最后在清单文件中加入广播配置详解

 <receiver android:name=".RingReceived">
            <intent-filter>
                <action android:name="com.example.zy_alarm_notification.Ring">action>
            intent-filter>
        receiver>

注意:在res下新建文件夹raw放入响铃的声音(多媒体播放音乐)

效果图

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