Android-闹钟(单次闹钟及周期闹钟<通过服务>)，发送通知

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首先，写个简单的布局文件：

0.1设置闹钟界面

<?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: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.asus.android_28_alarm_notification.MainActivity">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="设置闹钟(一次)"        android:onClick="setAlarm"        />    <Button        android:layout_width="match_parent"        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"        android:onClick="cancelAlarmCycle"        />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="发送通知"        android:onClick="sendNotification"        /></LinearLayout>

0.2闹铃界面

<?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_ring"    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.asus.android_28_alarm_notification.RingActivity">    <TextView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="懒猪，起床了!"        android:textSize="20sp"        />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="停止"        android:onClick="stop"        /></LinearLayout>

0.3写一个服务类

注：服务需要配置

<receiver android:name=".RingReceived">            <intent-filter>                <action android:name="com.asus.android_28_alarm_notification"></action>            </intent-filter>        </receiver>

package com.asus.android_28_alarm_notification;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;/** * Created by ASUS on 2017/2/15. */public class RingReceived extends BroadcastReceiver{    @Override    public void onReceive(Context context, Intent intent) {        if ("com.asus.android_28_alarm_notification".equals(intent.getAction())) {            Log.i("test","闹钟响了");            //跳转到Activity            Intent intent1=new Intent(context,RingActivity.class);            //getIntent设置标志位            intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);            context.startActivity(intent1);        }    }}

1.Android中单单设置闹钟比较简单：

注：闹钟管理者我设置的是全局变量：

    private AlarmManager alarmManager;    @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 setAlarm(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);        //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) {                Calendar c=Calendar.getInstance();                c.set(Calendar.HOUR_OF_DAY,hourOfDay);                c.set(Calendar.MINUTE,minute);                Intent intent=new Intent();                intent.setAction("com.asus.android_28_alarm_notification");                //将来时态的跳转                PendingIntent pendingIntent=PendingIntent.getBroadcast(getApplicationContext(),0x00,intent,0);                //设置闹钟                alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);                //时间一到，发送广播                //广播接受者(跳转Activity)                //时间一到，跳转Activity，并在该Activity中播放音乐            }        },hour,minute,true);        timePickerDialog.show();    }

2.设置周期闹钟

注：pendingIntent是全局变量

private PendingIntent pendingIntent;

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);        //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) {                Calendar c=Calendar.getInstance();                c.set(Calendar.HOUR_OF_DAY,hourOfDay);                c.set(Calendar.MINUTE,minute);                Intent intent=new Intent();                intent.setAction("com.asus.android_28_alarm_notification");                //将来时态的跳转                pendingIntent = PendingIntent.getBroadcast(getApplicationContext(),0x00,intent,0);                //设置闹钟//                alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);                //设置周期闹钟                alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000, pendingIntent);                //时间一到，发送广播                //广播接受者(跳转Activity)                //时间一到，跳转Activity，并在该Activity中播放音乐            }        },hour,minute,true);        timePickerDialog.show();    }

3.结束周期闹钟

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

4.发送系统通知

public void sendNotification(View view){        //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.setContentTitle("今天天气不错");        builder.setContentText("阳光明媚，万里无云");        builder.setDefaults(NotificationCompat.DEFAULT_ALL);        builder.setAutoCancel(true);        builder.setSmallIcon(android.R.drawable.ic_media_play);        builder.setContentIntent(PendingIntent.getActivity(this,0x102,new Intent(this,RingActivity.class),0));        Notification notification=builder.build();        //发送通知        notificationManager.notify(0x101,notification);    }

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