使用Notification在状态栏上显示通知

运行效果图：

            

 结构目录：

注意事项：

如果logcat有错误提示：No Channel found for pkg， 可参考链接：https://blog.csdn.net/u010356768/article/details/83546008

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/background"
    tools:context=".MainActivity">


</RelativeLayout>

activity_detail.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/img"
    tools:context=".DetailActivity">

</RelativeLayout>

MainActivity：

package com.mingrisoft.notification;

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.graphics.Color;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends AppCompatActivity {
    final int NOTIFIYID = 0x123;    //通知的ID

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //获取通知管理器用于发送通知
        final NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        //创建一个Notification对象
        Notification.Builder notification = new Notification.Builder(MainActivity.this);
        //设置打开该通知，该通知自动消失
        notification.setAutoCancel(true);
        //设置通知的图标
        notification.setSmallIcon(R.drawable.packet);
        //设置通知的标题
        notification.setContentTitle("奖励百万红包");
        //设置通知的内容
        notification.setContentText("点击查看详情");
        //设置发送时间
        notification.setWhen(System.currentTimeMillis());
        //设置使用系统默认的声音、震动
        notification.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE);
        //兼容android8.0
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel("001","my_channel",NotificationManager.IMPORTANCE_DEFAULT);
            channel.enableLights(true); //是否在桌面icon右上角展示小红点
            channel.setLightColor(Color.GREEN); //小红点颜色
            channel.setShowBadge(true); //是否在久按桌面图标时显示此渠道的通知
            notificationManager.createNotificationChannel(channel);
            notification.setChannelId("001");
        }

        //创建一个启动DetailActivity的Intent
        Intent intent = new Intent(MainActivity.this, DetailActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, intent, 0);
        //设置通知栏点击跳转
        notification.setContentIntent(pendingIntent);
        //发送通知
        notificationManager.notify(NOTIFIYID, notification.build());
    }
}

DetailActivity：

package com.mingrisoft.notification;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class DetailActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail);
    }
}

因为程序要访问系统震动器，所以要声明权限：

manifests:

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

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        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>
        <activity android:name=".DetailActivity"></activity>
    </application>

</manifest>