Android 利用AlarmManager和NotificationManager来实现闹钟和通知栏

实现闹钟运行的效果如下：





通知栏的运行后效果图如下：



通知栏下载（进度条）





布局文件（activity_main.xml）

<?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.example.g150825_android28.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="setAlarm"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="取消周期闹钟"
android:onClick="cancelAlarm"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="发送通知"
android:onClick="send"
/>
</LinearLayout>

activity_ring.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context="com.example.g150825_android28.RingActivity">

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="停止"
android:onClick="stop"
android:id="@+id/button"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="慈禧太后青霜来了，赶紧起床！"
android:id="@+id/textView"
android:textSize="30sp"
android:layout_below="@+id/button"
android:layout_centerHorizontal="true"
android:layout_marginTop="36dp" />

</RelativeLayout>

Java代码（MainActivity）

package com.example.g150825_android28;

import android.app.AlarmManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.app.NotificationCompat;
import android.view.View;
import android.widget.TimePicker;

import java.util.Calendar;

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);
}

public void setAlarmOne(View view){
//得到系统的时间
Calendar calendar=Calendar.getInstance();
int hourOfDay=calendar.get(Calendar.HOUR_OF_DAY);//得到的小时
int minute=calendar.get(Calendar.MINUTE);//分钟

//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) {
//得到设置之后的时间
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,i);
c.set(Calendar.MINUTE,i1);

//实例化闹钟管理器
AlarmManager alarmManager= (AlarmManager) MainActivity.this.getSystemService(Context.ALARM_SERVICE);

Intent intent=new Intent();
//设置广播名字
intent.setAction("com.example.g150825_android28.RING");

//将来执行的操作
PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0x101,intent,0);
alarmManager.set(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),pendingIntent);
}
},hourOfDay,minute,true);
timePickerDialog.show();
}

public void setAlarm(View view){
//得到系统的时间
Calendar calendar=Calendar.getInstance();
int hourOfDay=calendar.get(Calendar.HOUR_OF_DAY);//得到的小时
int minute=calendar.get(Calendar.MINUTE);//分钟

//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) {
//得到设置之后的时间
Calendar c=Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY,i);
c.set(Calendar.MINUTE,i1);

//实例化闹钟管理器

alarmManager = (AlarmManager) MainActivity.this.getSystemService(Context.ALARM_SERVICE);

Intent intent=new Intent();
//设置广播名字
intent.setAction("com.example.g150825_android28.RING");

//将来执行的操作

pendingIntent = PendingIntent.getBroadcast(MainActivity.this,0x102,intent,0);
//周期
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,c.getTimeInMillis(),5000,pendingIntent);
}
},hourOfDay,minute,true);
timePickerDialog.show();
}

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

}

public void send(View view){
//实例化通知管理器
NotificationManager nm= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
//实例化通知
NotificationCompat.Builder builder=new NotificationCompat.Builder(this);
//给通知栏设置参数
builder.setDefaults(NotificationCompat.DEFAULT_ALL);
//设置大图标
Bitmap bitmp= BitmapFactory.decodeResource(getResources(),android.R.drawable.btn_star);
builder.setLargeIcon(bitmp);
//设置小图标
builder.setSmallIcon(android.R.drawable.ic_media_pause);
//设置标题
builder.setContentTitle("您有新的消息：");
builder.setContentText("消息内容：恭喜您中大奖啦!");
builder.setNumber(10);

Intent intent=new Intent(this,RingActivity.class);
PendingIntent pendingIntent=PendingIntent.getActivity(this,0x101,intent,PendingIntent.FLAG_UPDATE_CURRENT);
//设置跳转页面
builder.setContentIntent(pendingIntent);

//设置点击通知之后，状态栏删除通知
builder.setAutoCancel(true);
//展示提示文字
builder.setTicker("主人，您有新消息哦");

//发送通知
nm.notify(0x201,builder.build());

}

}

RingActivity

package com.example.g150825_android28;

import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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);

mediaPlayer = MediaPlayer.create(this, R.raw.sqbm);
mediaPlayer.start();
}

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

}
}

MyReceiver

package com.example.g150825_android28;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class MyReceiver extends BroadcastReceiver {
public MyReceiver() {
}

@Override
public void onReceive(Context context, Intent intent) {
if("com.example.g150825_android28.RING".equals(intent.getAction())){
Toast.makeText(context, "闹钟响了", Toast.LENGTH_SHORT).show();
//跳转到Activity
Intent intent1=new Intent(context,RingActivity.class);
//设置标志位(Flag)
intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent1);

}
}
}

清单文件（AndroidManifest.xml）

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.g150825_android28">

<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=".MyReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="com.example.g150825_android28.RING" />
</intent-filter>
</receiver>

<activity android:name=".RingActivity"
android:theme="@style/Theme.AppCompat.Dialog"
></activity>
</application>

</manifest>