OS independent call to applyStyle

android/build.gradle

@@ -34,12 +34,40 @@ task clean(type: Delete) {
     delete rootProject.buildDir
 }
 
-task checkStyle(type:Exec) {
+task checkStyle(type:JavaExec) {
+    workingDir = "utils"
+    classpath = files("utils/google-java-format-1.7-all-deps.jar")
+    FileTree tree = fileTree('app/src/main/java') {
+        include '**/*.java'
+    }
+    args(["-n","--set-exit-if-changed"]) // -n prints filename if using wrong style
+    tree.each {args += it}
+    //color codes: "\u001B[33m" - yellow, "\u001B[32m" - green, "\u001B[0m" - reset (Unix)
+    doFirst {
+        println("You can fix the style of the files below (if any) with "
+                + "\u001B[33m" + "./gradlew applyStyle" + "\u001B[0m")
+    }
+    doLast { // will only execute on success (exitcode=0)
+        println ("\u001B[32m" + " -> All java files follow the correct style." + "\u001B[0m")
+    }
+}
+
+task checkStyleUnix(type:Exec) {
     workingDir 'utils'
     commandLine './checkStyle.sh'
 }
 
-task applyStyle(type:Exec) {
+task applyStyle(type:JavaExec) {
+    workingDir = "utils"
+    classpath = files("utils/google-java-format-1.7-all-deps.jar")
+    FileTree tree = fileTree('app/src/main/java') {
+        include '**/*.java'
+    }
+    args("-r") // replace cmd, means write changes back to source file
+    tree.each {args += it}
+}
+
+task applyStyleUnix(type:Exec) {
     workingDir 'utils'
     commandLine './applyStyle.sh'
-}
+}