Android(安卓)O 8.0 通知(Notification)更新后的简单兼容写法

我是Android初学者，在看第一行代码学习自学时，其中通知用到NotificationCompat()这个V4库中的方法。但是在实际使用时发现书上的代码已经过时并且Android8.0已经不支持这种写法，经过几天的研究终于写出一个可以同时兼容Android8.0及以下的通知写法再此把我的研究过程写给大家。

·查找的资料

代码过时第一想到的就是看源码的替代代码是什么，所以我贴上源码的截图参考

仔细看一下官方的说明

通过百度在一篇文章中详细介绍了channel的用法及其特性，我贴出地址 http://www.jianshu.com/p/92afa56aee05
我按照文章中的方法创建了channel并在NotificationCompat中使用，但是在模拟器中出现了BUG 界面出错并且抽风。

贴出错误代码

            String id = "channel_1";            String description = "123";            int importance = NotificationManager.IMPORTANCE_HIGH;            NotificationChannel mChannel = new NotificationChannel(id, "123", importance);            //  mChannel.setDescription(description);            //  mChannel.enableLights(true);            //  mChannel.setLightColor(Color.RED);            //  mChannel.enableVibration(true);            //  mChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});            mNotificationManager.createNotificationChannel(mChannel);            Notification notification = new Notification.Builder(this, id)                    .setContentTitle("Title")                    .setSmallIcon(R.mipmap.ic_launcher)                    .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))                    .setContentTitle("您有一条新通知")                    .setContentText("这是一条逗你玩的消息")                    .setAutoCancel(true)//                    .setContentIntent(pintent)                    .build();            mNotificationManager.notify(1, notification);

这样写会出现如下错误还伴随卡死
大概可能是不安全吧关于Android O的写法在网上很少最后在一个国外网站上看到一种写法可行并且我把它改编还可以适配Android8.0以下的系统贴出国外网站 http://forum.yourwebapp.mobi/android-o-how-to-use-notification-channels/不得不说标题非常亲民啊：ANDROID O: HOW TO USE NOTIFICATION CHANNELS

·改编后的具有简单兼容性的代码

NotificationUtils:

import android.app.Notification;import android.app.NotificationChannel;import android.app.NotificationManager;import android.content.Context;import android.content.ContextWrapper;import android.os.Build;import android.support.v4.app.NotificationCompat;/** * Created by LaoZhao on 2017/11/19. */public class NotificationUtils extends ContextWrapper {    private NotificationManager manager;    public static final String id = "channel_1";    public static final String name = "channel_name_1";    public NotificationUtils(Context context){        super(context);    }    public void createNotificationChannel(){        NotificationChannel channel = new NotificationChannel(id, name, NotificationManager.IMPORTANCE_HIGH);        getManager().createNotificationChannel(channel);    }    private NotificationManager getManager(){        if (manager == null){            manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);        }        return manager;    }    public Notification.Builder getChannelNotification(String title, String content){        return new Notification.Builder(getApplicationContext(), id)                .setContentTitle(title)                .setContentText(content)                .setSmallIcon(android.R.drawable.stat_notify_more)                .setAutoCancel(true);    }    public NotificationCompat.Builder getNotification_25(String title, String content){        return new NotificationCompat.Builder(getApplicationContext())                .setContentTitle(title)                .setContentText(content)                .setSmallIcon(android.R.drawable.stat_notify_more)                .setAutoCancel(true);    }    public void sendNotification(String title, String content){        if (Build.VERSION.SDK_INT>=26){            createNotificationChannel();            Notification notification = getChannelNotification                    (title, content).build();            getManager().notify(1,notification);        }else{            Notification notification = getNotification_25(title, content).build();            getManager().notify(1,notification);        }    }}

MainActivity:

import android.app.NotificationManager;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends AppCompatActivity implements View.OnClickListener{    private NotificationManager mManager;    private Button sendn;    public static final String id = "channel_1";    public static final String name = "名字";    private NotificationUtils notificationUtils;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        sendn = findViewById(R.id.send_notice);        sendn.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()){            case R.id.send_notice:                NotificationUtils notificationUtils = new NotificationUtils(this);                notificationUtils.sendNotification("测试标题", "测试内容");        }    }}

布局文件activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

经过测试可以在8.0模拟器和7.0模拟器运行。