When the project is already opened in android studio and the same time Another project is opened in android studio then use the Reopen project. When the project work is done in android studio then use the Close project and When all project is complete in android studio then use the Save All.
How to Reopen, Close and Save project in Android Studio
How to reopen the project in Android Studio performs the following steps:
Step 1: Firstly, Click on File then Click on Reopen Project and choose the file which file you want to be opened. We choose “My Application” file.
Step 2: After that a message box will be shown on your computer screen. This will show project will be opened in “This Window” or “New Window”. We open the project in “New Window” and After that your project will be opened.
How to Close project in Android Studio:
Step 1: Click on File then Click on Close Project and your project will be closed.
How to Save project in Android Studio:
Step 1: Click on File then Click on Save All and your project will be saved. You can also use ctrl+S shortcut.