add pmd, findbugs to gradle

build.gradle

@@ -175,3 +175,58 @@ afterEvaluate {
 task wrapper(type: Wrapper) {
     gradleVersion = '2.14.1'
 }
+
+apply plugin: 'pmd'
+
+task pmd(type: Pmd, group: 'reporting', description: 'Inspect sourcecode for bugs') {
+    ruleSetFiles = files("pmd.xml")
+    ignoreFailures = true
+    ruleSets = []
+
+    source 'src'
+    include '**/*.java'
+    exclude '**/gen/**'
+    exclude '**/test/**'
+
+    reports {
+        xml.enabled = true
+        html.enabled = true
+        xml {
+            destination "$reportsDir/pmd/pmd.xml"
+        }
+        html {
+            destination "$reportsDir/pmd/pmd.html"
+        }
+    }
+}
+
+afterEvaluate {
+    if (project.tasks.findByName('check')) {
+        check.dependsOn('pmd')
+    }
+}
+
+apply plugin: 'findbugs'
+
+task findbugs(type: FindBugs) {
+    ignoreFailures = true
+    classes = files('build/intermediates/classes/debug')
+    source = fileTree('src/main/java/')
+    classpath = files()
+    excludeFilter = new File("findbugs.xml")
+
+    effort = 'max'
+    reports {
+        xml.enabled = true
+        html.enabled = false
+        xml {
+            destination "$reportsDir/findbugs/findbugs.xml"
+        }
+    }
+}
+
+afterEvaluate {
+    if (project.tasks.findByName("check")) {
+        check.dependsOn('findbugs')
+    }
+}

findbugs.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<FindBugsFilter>
+    <Match>
+        <Class name="~.*\.R\$.*"/>
+    </Match>
+    <Match>
+        <Class name="~.*\.Manifest\$.*"/>
+    </Match>
+	<Match>
+		<Class name="~.*\.*Test" />
+		<Not>
+			<Bug code="IJU" /> 
+		</Not>
+	 </Match>
+</FindBugsFilter>

pmd.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0"?>
+<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" name="Android Application Rules"
+    xmlns="http://pmd.sf.net/ruleset/1.0.0"
+    xsi:noNamespaceSchemaLocation="http://pmd.sf.net/ruleset_xml_schema.xsd"
+    xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0 http://pmd.sf.net/ruleset_xml_schema.xsd">
+
+    <rule ref="rulesets/java/android.xml" />
+	<rule ref="rulesets/java/basic.xml" />
+	<rule ref="rulesets/java/braces.xml"/>
+    <rule ref="rulesets/java/clone.xml" />
+	<rule ref="rulesets/java/codesize.xml" />
+	<rule ref="rulesets/java/coupling.xml" >
+		<exclude name="LawOfDemeter"/>
+		<exclude name="LoosePackageCoupling"/>
+	</rule>
+	<rule ref="rulesets/java/design.xml" >
+		<exclude name="ImmutableField"/>
+	</rule>
+	<rule ref="rulesets/java/empty.xml" />
+    <rule ref="rulesets/java/finalizers.xml" />
+    <rule ref="rulesets/java/imports.xml">
+        <exclude name="TooManyStaticImports" />
+    </rule>
+    <rule ref="rulesets/java/logging-java.xml">
+        <exclude name="GuardLogStatementJavaUtil" />
+    </rule>
+
+    <rule ref="rulesets/java/strings.xml" />
+    <rule ref="rulesets/java/naming.xml">
+        <exclude name="AbstractNaming" />
+        <exclude name="LongVariable" />
+		<exclude name="ShortVariable"/>
+		<exclude name="ShortClassName"/>
+		<exclude name="ShortMethodName"/>
+	    <exclude name="VariableNamingConventions" />
+    </rule>
+	<rule ref="rulesets/java/strictexception.xml" />
+	<rule ref="rulesets/java/sunsecure.xml" />
+	<rule ref="rulesets/java/typeresolution.xml" />
+	<rule ref="rulesets/java/unnecessary.xml" />
+	<rule ref="rulesets/java/unusedcode.xml" />
+</ruleset>