当我们在eclipse中开发android程序的时候，往往需要看源代码（可能是出于好奇，可能是读源码习惯），那么如何查看Android源代码呢？-When we develop android programs in eclipse, they often need to look at the source code (perhaps out of curiosity, may be used to read the source code), then how to view the Android source code?