Windows: Ctrl + Alt + L
Linux: Ctrl + Shift + Alt + L
macOS: Option + Command + L
Reference: Key Commands and here are all of the commands for Windows/ Linux users and for Mac users.
As Rohit faced a problem in Ubuntu with the format code shortcut, this is due to the Ctrl + Alt + L key being used to lock the screen in Ubuntu.
I found that Ubuntu handles this keyboard shortcut first. So you should bind the Ctrl + Alt + L keyboard shortcut to something else so that it doesn’t conflict with Ubuntu.
Go to System Tools → System Settings → Keyboard → Shortcuts tab → System → Lock Screen.
Select the row New Accelerator…, then press any special key with the Alpha key (e.g. Shift + L). You should’ve successfully changed the keyboard shortcut.
Check if the keyboard shortcut now works in Android Studio.
Ctrl + Alt + Shift + L (to show a dialog)
You can also use Eclipse shortcuts.
- Windows and Linux: Go to menu File → Settings → Keymap
- macOS: Go to menu Preferences → Keymap and choose Eclipse from the drop-down menu.
Select code which you want to reformat
Click on Code in the menu bar and select Reformat Code as shown in the image below:
In Android studio 3.5, there is problem with rearranging the xml code, it also rearrange the views as well, so need to use these settings first.
Settings -> Editor -> Code Style -> XML-> Set From -> Predefined Style > Android.
Update for Android Studio 4+
Since Android Studio 4+, you might face issue shortcuts on mac. Shortcuts not working after updating to Android studio 4, in Mac? have an answer for that.