(On the basis of Linux core, Android provides various shared function libraries and a complete application framework. Apache copyright that is more suitable for commercial restrictions shall be selected. On the basis of Linux core, it provides Google's self controlled application running environment (called Dalvik, which is different from Sun's J2ME), and provides free, cross platform (Windows, MacOSX, Linux) development tools (SDKs) based on Eclipse combined development environment (IDE), which is convenient for application developers to learn and use.
Easy to understand Android.pdf)