How to add external dependencies (jar file) to android studio?

Question

I am trying to add external projects (httpmime-4.0-sources.jar) to an android project caused by the android studio popping up errors like

• error: org.apache.http.entity.mime package does not exist
• error: cannot find MultipartEntity character class
• error: cannot find HttpMultipartMode character class

I need help.

As a practice, I copied the jar file to the lib folder and added this as a library. But the error does not disappear.

Answer 1

Step wise

• Copy the JAR file to the libs folder
• Register the module in the build.gradle file, the instructions for which are given in steps 3 to 9
• Open the file menu and click on the project structure.
• Now in the Project Structure dialog box, select the application in the module
• Now click the Dependencies tab in the project structure dialog box.
• Click the + sign in the right corner.
• Select "File Dependency" in the list.
• Select jar file from libs folder
• Click Apply and Ok
• Finally click gradle sync button

One more thing, check for a proxy connection if you are using it.

Answer 2

First copy your library to the libs folder, and then add this dependency to build.gradle:

dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) ...... }