Android Notification 兼容3.0到8.0

Build.VERSION.SDK_INT<11
http://www.cnblogs.com/hasse/p/5164417.html

//Android 4.1之前 创建一个Notification
Notification notification = new Notification();		
//设置事件信息
notification.setLatestEventInfo(context,title,content, pendingIntent);

Build.VERSION.SDK_INT >= 11 && Build.VERSION.SDK_INT < 22

//使用Notification.Builder创建一个Notification
Notification.Builder builder = new Notification.Builder(this);
Notification notification= builder.getNotification();// 调用getNotification()来生成Notification   
//其实也可以这么写    
Notification notification = builder.build();//将builder对象转换为普通的notification    
//实际上builder.getNotification();里面的实现就是builder.build()

Build.VERSION.SDK_INT >=22 && Build.VERSION.SDK_INT < 26

  //使用NotificationCompat.Builder创建一个Notification
  Notification notification = new NotificationCompat.Builder(mContext).build();

https://www.jianshu.com/p/6187fe8a0704

Build.VERSION.SDK_INT>=26
Android系统在 8.0 以后增加了通知通道，要正确的在 8.0 系统上使用通知，
需要进行版本判定， 然后进行适配,创建出 Builder以后，其他操作不变。
如果不对其进行处理的话会出现：
Failed to post notification on channel "null"的错误提示。

https://blog.csdn.net/qq_39622065/article/details/83033167

if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.O) {
                    String channelId = "notification_simple";
                    NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
                    NotificationChannel channel = new NotificationChannel(channelId, "simple", NotificationManager.IMPORTANCE_DEFAULT);
                    manager.createNotificationChannel(channel);
}

参考文章

8.0 通知后系统界面崩溃,无限闪屏
https://www.jianshu.com/p/06e04ac55db3

Notification、Notification.Builder 和NotificationCompat.Builder的区别 https://blog.csdn.net/weixin_43174412/article/details/82629985

不同版本Notification的显示问题
https://blog.csdn.net/qq_30393319/article/details/52121331

其他问题

//我的代码
Notification.Builder builder = new Notification.Builder(context);
Bitmap largeIcon largeIcon = BitmapUtil.getLoacalBitmapFromUrl(imageUrl);
//imageUrl是网络图片地址、先从网上下载图片到文件夹中、然后把它转为Bitmap 
builder.setLargeIcon(largeIcon);

// 6.0 报错  等待解决
Caused by: java.lang.AbstractMethodError: abstract method "android.graphics.drawable.Drawable android.content.pm.PackageManager.getUserBadgeForDensity(android.os.UserHandle, int)"
	at android.app.Notification$Builder.getProfileBadgeDrawable(Notification.java:2890)
	at android.app.Notification$Builder.hasThreeLines(Notification.java:3105)
	at android.app.Notification$Builder.build(Notification.java:3660)```