Unified development environment, what modules and components does the SDK that developers rely on mainly include? How is it different from J2ME framework? What is the learning cost?

Original ecological development: developers use the single mobile phone platform SDK provided by mobile phone operating system manufacturers for development. Cross-platform development: once development and multiple compilation, developers use one language (Java) to develop, compile source code with various native SDK through cross-platform middleware (including cross-platform runtime, platform conversion engine and Eclipse compilation plug-in), and automatically package and generate various mobile phone applications.

It is roughly divided into two modules:

1. It contains SDK of several different mobile phone systems. By providing good "middleware" including (cross-platform runtime, platform conversion engine, Eclipse compiler plug-in), the source code is automatically packaged with their respective SDK.

2. The Unified Development Environment (beta) integrates Eclipse, three types of mobile application SDKs (currently supporting Android, J2ME and Symbian) and Eclipse plug-ins corresponding to the SDKs, intelligently judges the running environment, and automatically installs and sets support tools for users. Developers only need to download and install once, and they have a stable and reliable mobile phone application development platform, which avoids scattered downloads and cumbersome settings and saves valuable time.