Overall interface architecture of the android Project (reusable) and android Architecture

Overall interface architecture of the android Project (reusable) and android Architecture

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What should I do if I develop an android project?

Does android have similar things? Do you also need to consider frameworks and other things? Please help.
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If the database is used locally, it is embedded with sqlite3. If you use a remote database, you can use it as needed.
I personally think the architecture is basically mvc, but it is best to discard the web ssh framework and re-learn the beautiful design pattern of Android.
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Focus on the reusability of components.
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First, let's talk about the design concept:
1. First, design the database as needed, because almost all operations should refer to the data model. 1 million people/times per day
SQL Server or mysql.
2. Secondly, design the android interface, and design the business logic to be consistent.
3. create and implement the android object class again.
4. Finally, return the request sent by the front-end server design and processing.
The above four steps are generally involved.
As for the design pattern and framework:
Some tool classes on android can be used in a single example or factory.
The android end does not need the framework (not yet ...), In the background, we recommend that you use struts2 to control and process requests.
I think so much for the moment. If you don't understand it, ask again.

SDH multiplexing Structure

SDH multiplexing involves two scenarios: one is that the lower-level SDH signal is reused into the higher-level SDH signal.
One is the low-speed branch signal, for example, 2 Mbit/s 34 Mbit/s 140 Mbit/s, multiplexing into SDH Signal
STM-N
The first case is that the multiplexing method mentioned above is mainly completed through the inter-byte insertion multiplexing method.
The number of multiplexing is 4 in one, that is, 4 STM-1 STM-4 4 STM-4 STM-16
Keep frame rate unchanged 8000 frames/second during multiplexing, which means high level STM-N Signal
It is four times of the low-level STM-N signal rate.
The Net Load and pointer bytes are inserted and reused based on the original value, while the segment overhead will be reused.
In the STM-N frame, SOH is not the overhead of all low-level SDH frames.
Is to discard the segment overhead of some low-level frames. The specific reuse method is described in the next section.
The second case is to reuse the PDH signal into the STM-N signal.