How to use 4-space wide tab character in Android Studio?

Issue

I'm creating a Flutter app in android studio. Under Settings -> Editor -> Code Style -> Dart, I enabled "use tab character" and changed the tab size and indent to 4.

However, nothing seemed to have changed in the main.dart file, so I used Ctrl-Alt-Shift-L to reformat the code (even tried with "code cleanup" enabled), but it still uses two spaces to indent.

How do I make android studio use tab characters?

Solution

You can still change the tab indents manually via the configuration files in Android Studio 4.

Look for your configuration files, where CONFIGURATION_FOLDER is your android studio folder:

Windows: %USERPROFILE%\. CONFIGURATION_FOLDER.

macOS: ~/Library/Preferences/ CONFIGURATION_FOLDER.

Linux: ~/. CONFIGURATION_FOLDER.

And then add a new section into the file your IDE is using. Mine is codestyles/Default.xml.

Like so:

<code_scheme name="Default" version="173">
  ...
  <codeStyleSettings language="Dart">
    <option name="BRACE_STYLE" value="2" />
    <option name="METHOD_BRACE_STYLE" value="2" />
    <option name="ELSE_ON_NEW_LINE" value="true" />
    <indentOptions>
      <option name="INDENT_SIZE" value="4" />
      <option name="TAB_SIZE" value="4" />
    </indentOptions>
  </codeStyleSettings>
  ...
</code_scheme>

Answered By - iOSonntag