Android adds system custom jar process

introduction

Usually when we develop Android applications, we need to import the Android SDK, that is, android.jar, which is a dynamic jar package. android.jar provides the interface capability of the framework layer, among which framework.jar and services.jar are two important jar packages, which are used for interface exposure and interface implementation respectively.

Connect the mobile phone through adb, enter $BOOTCLASSPATH and $SYSTEMSERVERCLASSPATH respectively to view the actual paths of framework.jar and services.jar.