EditorConfig for Android projects with mapping to IntelliJ IDEA's config

.editorconfig

root = true

[*]
charset = utf-8
end_of_line = lf
indent_size = 4
indent_style = space
insert_final_newline = true
trim_trailing_whitespace = true
max_line_length = 120
# Uncomment if you want to show non-strict recommended guideline
#ij_visual_guides = 100

# General
ij_continuation_indent_size = 8
ij_smart_tabs = false
ij_wrap_on_typing = false
ij_any_keep_indents_on_empty_lines = false

# Formatter
ij_formatter_tags_enabled = true
ij_formatter_on_tag = @formatter:on
ij_formatter_off_tag = @formatter:off

[{*.kt,*.kts}]
# Tabs and Indents
#  continuation_indent_size = 4 to match ktlint settings
ij_kotlin_continuation_indent_size = 4
ij_kotlin_keep_indents_on_empty_lines = unset

# Spaces
## Before parentheses
ij_kotlin_space_before_if_parentheses = true
ij_kotlin_space_before_for_parentheses = true
ij_kotlin_space_before_while_parentheses = true
ij_kotlin_space_before_catch_parentheses = true
ij_kotlin_space_before_when_parentheses = true
## Around operators
ij_kotlin_spaces_around_assignment_operators = true
ij_kotlin_spaces_around_logical_operators = true
ij_kotlin_spaces_around_equality_operators = true
ij_kotlin_spaces_around_relational_operators = true
ij_kotlin_spaces_around_additive_operators = true
ij_kotlin_spaces_around_multiplicative_operators = true
ij_kotlin_spaces_around_unary_operator = false
ij_kotlin_spaces_around_range = false
## Other
ij_kotlin_space_before_comma = false
ij_kotlin_space_after_comma = true
ij_kotlin_space_before_type_colon = false
ij_kotlin_space_after_type_colon = true
ij_kotlin_space_before_extend_colon = true
ij_kotlin_space_after_extend_colon = true
ij_kotlin_insert_whitespaces_in_simple_one_line_method = true
ij_kotlin_spaces_around_function_type_arrow = true
ij_kotlin_spaces_around_when_arrow = true
ij_kotlin_space_before_lambda_arrow = true

# Wrapping and Braces
## Keep when reformatting
ij_kotlin_keep_line_breaks = true
ij_kotlin_keep_first_column_comment = true
## Extends/implements list
ij_kotlin_extends_list_wrap = normal
ij_kotlin_align_multiline_extends_list = false
ij_kotlin_continuation_indent_in_supertype_lists = false
## Function declaration parameters
ij_kotlin_method_parameters_wrap = on_every_item
ij_kotlin_align_multiline_parameters = true
ij_kotlin_method_parameters_new_line_after_left_paren = true
ij_kotlin_method_parameters_right_paren_on_new_line = true
ij_kotlin_continuation_indent_in_parameter_lists = false
## Function call arguments
ij_kotlin_call_parameters_wrap = on_every_item
ij_kotlin_align_multiline_parameters_in_calls = false
ij_kotlin_call_parameters_new_line_after_left_paren = true
ij_kotlin_call_parameters_right_paren_on_new_line = true
ij_kotlin_continuation_indent_in_argument_lists = false
## Function parentheses
ij_kotlin_align_multiline_method_parentheses = false
## Chained function calls
ij_kotlin_method_call_chain_wrap = normal
ij_kotlin_wrap_first_method_in_call_chain = false
ij_kotlin_continuation_indent_for_chained_calls = false
## 'if()' statement
ij_kotlin_else_on_new_line = false
ij_kotlin_if_rparen_on_new_line = true
ij_kotlin_continuation_indent_in_if_conditions = false
## 'do ... while()' statement
ij_kotlin_while_on_new_line = false
## 'try' statement
ij_kotlin_catch_on_new_line = false
ij_kotlin_finally_on_new_line = false
## Binary expressions
ij_kotlin_align_multiline_binary_operation = false
## Wraps
ij_kotlin_assignment_wrap = normal
ij_kotlin_enum_constants_wrap = off
ij_kotlin_class_annotation_wrap = split_into_lines
ij_kotlin_method_annotation_wrap = split_into_lines
ij_kotlin_field_annotation_wrap = split_into_lines
ij_kotlin_parameter_annotation_wrap = off
ij_kotlin_variable_annotation_wrap = off
## 'when' statements
ij_kotlin_align_in_columns_case_branch = false
ij_kotlin_line_break_after_multiline_when_entry = true
## Braces placement
ij_kotlin_lbrace_on_next_line = false
## Expression body functions
ij_kotlin_wrap_expression_body_functions = 1
ij_kotlin_continuation_indent_for_expression_bodies = false
## Elvis expressions
ij_kotlin_wrap_elvis_expressions = 1
ij_kotlin_continuation_indent_in_elvis = false

# Blank Lines
## Keep maximum blank lines
ij_kotlin_keep_blank_lines_in_declarations = 1
ij_kotlin_keep_blank_lines_in_code = 1
ij_kotlin_keep_blank_lines_before_right_brace = 0
## Minimum blank lines
ij_kotlin_blank_lines_after_class_header = 0
ij_kotlin_blank_lines_around_block_when_branches = 1
ij_kotlin_blank_lines_before_declaration_with_comment_or_annotation_on_separate_line = 1

# Imports
ij_kotlin_name_count_to_use_star_import = 5
ij_kotlin_name_count_to_use_star_import_for_members = 3
ij_kotlin_import_nested_classes = false
ij_kotlin_packages_to_use_import_on_demand = java.util.*,kotlinx.android.synthetic.**,io.ktor.**
ij_kotlin_imports_layout = *,java.**,javax.**,kotlin.**,^

# Other
## Trailing comma
ij_kotlin_allow_trailing_comma = true
ij_kotlin_allow_trailing_comma_on_call_site = false

# Code generation
## Comment code
ij_kotlin_line_comment_at_first_column = true
ij_kotlin_line_comment_add_space = false
ij_kotlin_line_comment_add_space_on_reformat = false
ij_kotlin_block_comment_at_first_column = true
ij_kotlin_block_comment_add_space = false

# Compose
ij_kotlin_use_custom_formatting_for_modifiers = true

# Load/Save
ij_kotlin_code_style_defaults = KOTLIN_OFFICIAL

[*.kts]
# Always use wildcard imports in scripts
ij_kotlin_name_count_to_use_star_import = 2

# EditorConfig can not set some of XML code style options.
# Remember to set default Android XML code style: Editor > Code Style > XML > Set from... -> Android
[{**/res/**.xml,**/AndroidManifest.xml}]
# Tabs and Indents
ij_xml_continuation_indent_size = 4
ij_xml_keep_indents_on_empty_lines = unset

# Other
ij_xml_keep_line_breaks = false
ij_xml_keep_line_breaks_in_text = true
ij_xml_keep_blank_lines = 2
ij_xml_attribute_wrap = normal
ij_xml_text_wrap = normal
ij_xml_align_text = false
ij_xml_align_attributes = false
ij_xml_keep_whitespaces = false
## Spaces
ij_xml_space_around_equals_in_attribute = false
ij_xml_space_after_tag_name = false
ij_xml_space_inside_empty_tag = true
## CDATA
ij_xml_keep_whitespaces_around_cdata = preserve
ij_xml_keep_whitespaces_inside_cdata = false

# Code Generation
ij_xml_line_comment_at_first_column = true
ij_xml_block_comment_at_first_column = true
ij_xml_block_comment_add_space = false

# Android
ij_xml_use_custom_settings = true

[*.md]
trim_trailing_whitespace = false

# Wrapping and Braces
ij_markdown_wrap_text_if_long = false
ij_markdown_wrap_text_inside_blockquotes = false
## When reformatting
ij_markdown_keep_line_breaks_inside_text_blocks = true
ij_markdown_insert_quote_arrows_on_wrap = true
ij_markdown_format_tables = true

# Tabs and Indents
ij_markdown_keep_indents_on_empty_lines = unset

# Blank Lines
## Keep maximum blank lines
ij_markdown_max_lines_around_header = 1
ij_markdown_max_lines_around_block_elements = 1
ij_markdown_max_lines_between_paragraphs = 1
## Minimum blank lines
ij_markdown_min_lines_around_header = 1
ij_markdown_min_lines_around_block_elements = 1
ij_markdown_min_lines_between_paragraphs = 1

# Spaces
## Force one space
ij_markdown_force_one_space_between_words = true
ij_markdown_force_one_space_after_header_symbol = true
ij_markdown_force_one_space_after_list_bullet = true
ij_markdown_force_one_space_after_blockquote_symbol = true

[{*.yaml,*.yml}]
indent_size = 2
ij_yaml_keep_indents_on_empty_lines = unset
ij_yaml_keep_line_breaks = true
ij_yaml_spaces_within_brackets = false

[{*.bash,*.sh,*.zsh}]
indent_size = 2
tab_width = 2

[*.bat]
end_of_line = crlf

[*.properties]
ij_properties_keep_blank_lines = true

Unset options

If some common option is configured on top level and we want to ensure that developers hasn't overriden this option for specific language, it is useful to unset the option for the language. For example:

ij_any_keep_indents_on_empty_lines = false
ij_kotlin_keep_indents_on_empty_lines = unset

Wrap style mapping

Name	Option	Int*
Do not wrap	off	0
Wrap if long	normal	1
Chop down if long	on_every_item	-
Wrap always	split_into_lines	2

* int form is used in several options where it is not possible to use on_every_item mode

Source: WrappingAccessor.java

Imports Layout

The format of imports layout is not documented, but there is a comment with a brief description of it.