checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
<module name="Checker">
    <module name="NewlineAtEndOfFile"/>
    <module name="FileLength"/>
    <module name="FileTabCharacter"/>

    <!-- Trailing spaces -->
    <module name="RegexpSingleline">
        <property name="format" value="\s+$"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>
    <!--Trailing newline after open brace-->
    <module name="RegexpMultiline">
        <property name="format" value="\{\n\n"/>
        <property name="message" value="Extraneous newline after open curly brace."/>
    </module>
    <!-- Blank newline before close brace -->
    <module name="RegexpMultiline">
        <property name="format" value="\n\n\s*\}"/>
        <property name="message" value="Extraneous newline before close curly brace."/>
    </module>
    <!-- Space after 'for' and 'if' -->
    <module name="RegexpSingleline">
        <property name="format" value="^\s*(for|if)\b[^ ]"/>
        <property name="message" value="Space needed before opening parenthesis."/>
    </module>

    <!-- For each spacing -->
    <module name="RegexpSingleline">
        <property name="format" value="^\s*for \(.*?([^ ]:|:[^ ])"/>
        <property name="message" value="Space needed around ':' character."/>
    </module>

    <module name="TreeWalker">
        <property name="cacheFile" value="${checkstyle.cache.file}"/>
        <module name="ConstantName"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName"/>
        <module name="PackageName">
            <property name="format" value="^[a-z][a-zA-Z0-9_]+(\.[a-zA-Z_][a-zA-Z0-9_]*)*$"/>
        </module>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName"/>
        <module name="AvoidStarImport"/>
        <module name="IllegalImport"/>
        <module name="RedundantImport"/>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>
        <module name="ImportOrder">
            <property name="groups" value="android,com,org,java,javax,*"/>
            <property name="ordered" value="true"/>
            <property name="separated" value="true"/>
            <property name="option" value="bottom"/>
            <property name="sortStaticImportsAlphabetically" value="true"/>
        </module>
        <module name="LineLength">
            <property name="max" value="135"/>
        </module>
        <module name="GenericWhitespace"/>
        <module name="EmptyForIteratorPad"/>
        <module name="MethodParamPad"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>
        <module name="EmptyLineSeparator">
            <property name="allowNoEmptyLineBetweenFields" value="true"/>
            <property name="allowMultipleEmptyLines" value="false"/>
            <property name="allowMultipleEmptyLinesInsideClassMembers" value="false"/>
        </module>
        <module name="SingleSpaceSeparator"/>
        <module name="ModifierOrder"/>
        <module name="RedundantModifier"/>
        <module name="LeftCurly"/>
        <module name="RightCurly"/>
        <module name="CovariantEquals"/>
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <module name="IllegalInstantiation"/>
        <module name="InterfaceIsType"/>
        <module name="ArrayTypeStyle"/>
        <module name="UpperEll"/>
    </module>
</module>