Android 发送通知的写法（兼容8.0以上版本）

Android

1、工具类（NotificationUtils）

package com.zscdumin.zhixinapp.activity;
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.annotation.RequiresApi;
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);
    }
    @RequiresApi(api = Build.VERSION_CODES.O)
    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;
    }
    @RequiresApi(api = Build.VERSION_CODES.O)
    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);
        }
    }
}

2、使用

private void sendNotification() {
        NotificationUtils notificationUtils = new NotificationUtils(this);
        notificationUtils.sendNotification("测试标题", "测试内容");
}