'How can I import an entire project in Android Studio

I'm trying to import an entire project in Android Studio to my actual one. However, when I choose File->Import Project, it just opens new window with this project I need import, without anything importing in. What's wrong ?

Also I do not know how to reference to the imported project.

EDIT

I have now imported my old module, but I do not know how to use it: (I have added my module via project structure) but its functions are still invisible.

enter image description here

$ grep -ri click4 .
grep: ./app8/build/intermediates/dex/debug/mergeProjectDexDebug/classes.dex: binary file matches
grep: ./app8/build/intermediates/javac/debug/classes/com/exampleC/layouttable24/MainActivity$1.class: binary file matches
grep: ./app8/build/intermediates/javac/debug/classes/com/exampleC/layouttable24/MainActivity.class: binary file matches
grep: ./app8/build/intermediates/project_dex_archive/debug/out/com/exampleC/layouttable24/MainActivity$1.dex: binary file matches
grep: ./app8/build/intermediates/project_dex_archive/debug/out/com/exampleC/layouttable24/MainActivity.dex: binary file matches
./app8/src/main/java/com/exampleC/layouttable24/M:                        click4(view);
./app8/src/main/java/com/exampleC/layouttable24/M:    public void click4(View view) {
./app8/src/main/java/com/exampleC/layouttable24/MainActivity.java:                        click4(view);
./app8/src/main/java/com/exampleC/layouttable24/MainActivity.java:    public void click4(View view) {


Solution 1:[1]

Use File->New->Import Module

Solution 2:[2]

Just open the project in which you want to import the existing project and then go to

File->New->Import Module

And then just configure the project

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Peer Mohamed
Solution 2 Himanshu Mishra