In practice, explore the Android smartphone system-APK Program Installation

Required tools: Es file browser + virtual data cable

 

APK is short for Android package and is an android upper-layer application.ProgramSuch as PE's position on Windows. We know that to install a program on Windows is to copy all the files required by the program to the appropriate directory. The APK has only one file. The installation process is to copy the file to the/data/APP directory and change the file name without changing its content. Through the experiment, copy the APK of a debug version directly to the/data/APP directory, then you can see this program and run it.

 

In fact, the installation is very simple. What is difficult is how Android loads and executes an APK file. This is also the starting point for an in-depth understanding of the working principles of Android. At present, I still don't understand it. Let's explore it together.