Ctrl + Alt + O - To remove the unused import statements
Shift + Alt + Mouse Click - To add multi cursors
Ctrl + F4 - To close the current file
Ctrl + Shift + F - To find something in the whole application
Shift + F6 - To change the value at all places
Shift + F10 - To build and run the activity
Ctrl + F10 - To apply the changes and restart the activity
Ctrl + Shift + Backspace - To go to last edit location
Alt + Right-Arrow , Alt + Left-Arrow - To navigate between open files
Ctrl + / - To comment/uncomment with line comment
Ctrl + Shift + / - To comment/uncomment with block comment
Ctrl + Alt + L - To reformat the code