adding kotlin in gradle files

app/build.gradle

@@ -1,14 +1,16 @@
 apply plugin: 'com.android.application'
 apply plugin: 'android-apt'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
 
 android {
-    compileSdkVersion 25
+    compileSdkVersion 26
-    buildToolsVersion "25.0.2"
+    buildToolsVersion "26.0.2"
 
     defaultConfig {
         applicationId "com.simplemobiletools.flashlight"
         minSdkVersion 16
-        targetSdkVersion 25
+        targetSdkVersion 26
         versionCode 22
         versionName "1.22"
     }
@@ -24,17 +26,39 @@ android {
             signingConfig signingConfigs.release
         }
     }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    lintOptions {
+        checkReleaseBuilds false
+        abortOnError false
+    }
 }
 
 dependencies {
-    compile 'com.android.support:appcompat-v7:25.2.0'
+    compile 'com.simplemobiletools:commons:2.35.6'
     compile 'com.jakewharton:butterknife:8.0.1'
     compile 'com.squareup:otto:1.3.8'
     compile 'com.github.yukuku:ambilwarna:2.0.1'
+    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 
     apt 'com.jakewharton:butterknife-compiler:8.0.1'
 }
 
+buildscript {
+    ext.kotlin_version = '1.1.51'
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+        classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
+    }
+}
+
 def Properties props = new Properties()
 def propFile = new File('signing.properties')
 if (propFile.canRead()) {

build.gradle

@@ -16,6 +16,8 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven { url "https://jitpack.io" }
+        maven { url "https://maven.google.com" }
     }
 }