Android集成腾讯云通信关于全局消息监听的实现

Question

在Android集成腾讯云通信的时候遇到一个问题。在Activity中实现了腾讯云通信SDK里的TIMMessageListener类后通过onNewMessage方法接收云端的新消息。
但是，这个监听方法并不能在每个Activity里面实现。
1Activity里面实现了这个方法，并且在测试中接收到了新消息，但是跳转到2Activity之后再次实现了这个方法，并且在测试中也接收到了新消息，再返回到1Activity后就无法监听到新消息了，目测是因为在2Activity中这个方法被重新实现，所以之前实现的监听就报废了，当2Activity被销毁后，1Activity里面的监听无法恢复。
这是我碰到的问题。
我想问一下各位大神，该如何设计这个即时通讯功能。
比如说我需要在每个页面都监听新消息以便发送Notification，另外，需要给部分页面的图标增加角标，顺便在会话页面实现聊天过程。
本人刚刚入门，不是很了解整个流程，请大神指教。

Answer 1

General logic of IM:

1. Implement an Service, 用于接收推送消息(即注册SDK的TIMMessageListener), 然后调用Context.sendOrderedBroadcast(Intent, String)orderly broadcast message

2. Implement a android:priority="-999"的BroadcastReceiver, 并在AndroidManifest.xml中注册, 用于接收Service发送出来的有序广播, 并通过Notificationsend to the status bar. Since the level is very low, therefore, it will finally receive the above broadcast

3. InActivity/Fragment里注册BroadcastReceiver用于接收上述有序广播, 由于这个BroadcastReceiver的默认级别要比2中注册的BroadcastReceiver的要高, 因此会优先接收到广播, 在这里我们就可以做拦截处理(代码如下): 会话页面打开后, 不再通过状态栏通知收到新消息. Activity/Fragment关闭时, 反注册上述BroadcastReceiver, at this time, the new message reminder notification in the status bar has been restored.

private BroadcastReceiver mReceiverInActivityOrFragment = new BroadcastReceiver() {
    // TODO ...
    setResultCode(Activity.RESULT_CANCELED); 
}

Key knowledge points:

1. Orderly broadcast

2. Private permissions

Reference books:

• The Definitive Guide to Android Programming 2nd Edition Chapter 27-Broadcast Intent (The first edition is Chapter 30, the English version is as follows)

• Android Programming: The Big Nerd Ranch Guide

p.s. The respondent is not a book supporter. The respondent has read this book completely. The knowledge points in the book basically correspond to the official documents. It is equivalent to a Chinese book with official documents, and it is more relevant to the question. Question, so I recommend that the English electronic file can be downloaded from the Internet.