Android Notification小结

1、基本的

Android5.X通知栏做了改进，而且长按的时候会显示消息来源。

• 获取管理者

  NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
  

• 创建

   Notification.Builder builder = new Notification.Builder(MainActivity.this);
   Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.baidu.com"));
   PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this,0,intent,0);  //点击跳转
   builder.setSmallIcon(R.mipmap.ic_launcher);  //小图标，在大图标右下角
   builder.setLargeIcon(BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher)); //大图标，没有设置时小图标就是大图标
   builder.setContentIntent(pendingIntent);
   builder.setAutoCancel(true);   //点击的时候消失
   builder.setContentTitle("Basic");
   builder.setContentText("I am a basic notification");
   builder.setSubText("I'm a test");  //别的其他信息
   manager.notify(1,builder.build());  //参数一为ID，用来区分不同APP的Notification
  

2、折叠式Notification

• 折叠式Notification也是一种自定义视图的Notification，常常用于显示长文本，它拥有两个视图状态，一个的普通状态下的视图状态，另一个是展开状态下的视图状态。

  Notification.Builder builder = new Notification.Builder(MainActivity.this);
  Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.baidu.com"));
  PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this,0,intent,0);  //点击跳转
  builder.setSmallIcon(R.mipmap.ic_launcher);  //没设置发不出通知
  builder.setContentIntent(pendingIntent);
  builder.setAutoCancel(true);   //点击的时候消失
  Notification notification = builder.build();
  RemoteViews remoteViews = new RemoteViews(getPackageName(),R.layout.notification1);
  notification.contentView = remoteViews;
  notification.bigContentView = remoteViews;
  manager.notify(1,notification);
  

3、悬挂式Notification

• 悬挂式Notification是在Android5.0中新增加的方式，会悬挂在屏幕上方一段时间：

  Notification.Builder builder = new Notification.Builder(MainActivity.this)
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setPriority(Notification.PRIORITY_DEFAULT)
                    .setCategory(Notification.CATEGORY_MESSAGE)
                    .setContentTitle("Head")
                    .setContentText("I am a head notify");
  
            Intent intent = new Intent();
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.setClass(MainActivity.this,MainActivity.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this,0,intent,PendingIntent.FLAG_CANCEL_CURRENT);
            builder.setFullScreenIntent(pendingIntent,true);  //重点就是这句
            manager.notify(1,builder.build());
  

4、显示等级的Notification

• Android5.X新加入一种新的模式——Notification的显示等级，分为三个等级：
  VISIBILITY_PRIVATE：表明只有当没有锁屏的时候会显示。
  ViSIBILITY_PUBLIC：表明在任何情况下都会显示。
  ViSIBILITY_SECRET：表明在pin、password等安全锁和没有锁屏是情况下才能够显示。
  设置等级非常简单：

  builder.setVisibility(Notification.VISIBILITY_PRIVATE);