How to use the JDK Api not included with Android SDK in Android development

When Android is developing, you need to call the Java API that does not exist in the Android SDK and consider introducing the JDK. Get the solution by researching JDK package files and SDK files. Did not do this work, so spent a day, just understand what is going on ~ ~ ~

Harvesting: Find out the features of the directories in the JDK installation directory, and the Android SDK API package directory structure.

Workaround: In the installation directory, there is a compressed package src.zip, directly imported into the wirelessly can be ~ ~ ~

Project-Property---buildpath---source--adexternaljar----select Src.zip

So we don't have to think about how to add the JDK source to the Android.jar package.

How to use the JDK Api not included with Android SDK in Android development