[Upgrade] Convert to Kotlin

Signed-off-by: aabhasjindal <aabhas.j@zolostays.com>

app/build.gradle

@@ -1,4 +1,6 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion 28
@@ -29,4 +31,9 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
     implementation 'com.github.GrenderG:Toasty:1.4.0'
+    implementation "androidx.core:core-ktx:1.1.0"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
+repositories {
+    mavenCentral()
 }

app/src/androidTest/java/in/aabhasjindal/otpview/ExampleInstrumentedTest.kt

@@ -0,0 +1,18 @@
+package `in`.aabhasjindal.otpview
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see [Testing documentation](http://d.android.com/tools/testing)
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+
+    }
+}

app/src/main/java/in/aabhasjindal/otpview/MainActivity.kt

@@ -0,0 +1,40 @@
+package `in`.aabhasjindal.otpview
+
+import `in`.aabhasjindal.otptextview.OTPListener
+import `in`.aabhasjindal.otptextview.OtpTextView
+import android.os.Build
+import android.os.Bundle
+import android.view.WindowManager
+import android.widget.Button
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import es.dmoral.toasty.Toasty
+
+class MainActivity : AppCompatActivity() {
+    private var otpTextView: OtpTextView? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            val window = window
+            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)
+            window.statusBarColor = resources.getColor(R.color.black)
+        }
+        val errorButton = findViewById<Button>(R.id.button)
+        val successButton = findViewById<Button>(R.id.button2)
+        otpTextView = findViewById(R.id.otp_view)
+        otpTextView?.requestFocusOTP()
+        otpTextView?.otpListener = object : OTPListener {
+            override fun onInteractionListener() {
+
+            }
+
+            override fun onOTPComplete(otp: String) {
+                Toasty.success(this@MainActivity, "The OTP is $otp", Toast.LENGTH_SHORT).show()
+            }
+        }
+        errorButton.setOnClickListener { otpTextView?.showError() }
+        successButton.setOnClickListener { otpTextView?.showSuccess() }
+    }
+}

app/src/test/java/in/aabhasjindal/otpview/ExampleUnitTest.kt

@@ -0,0 +1,16 @@
+package `in`.aabhasjindal.otpview
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see [Testing documentation](http://d.android.com/tools/testing)
+ */
+class ExampleUnitTest {
+    @Test
+    fun additionIsCorrect() {
+        assertEquals(4, (2 + 2).toLong())
+    }
+}

build.gradle

@@ -1,15 +1,17 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-
+    ext.kotlin_version = '1.3.50'
+
     repositories {
         google()
         jcenter()
     }
     dependencies {
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
         classpath 'com.android.tools.build:gradle:3.2.1'
-
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

otptextview/build.gradle

@@ -1,4 +1,6 @@
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-android'
 apply plugin: 'com.github.dcendents.android-maven'
 group = 'com.github.aabhasjindal'
 
@@ -31,4 +33,9 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    api "androidx.core:core-ktx:1.1.0"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
+repositories {
+    mavenCentral()
 }

otptextview/src/androidTest/java/in/aabhasjindal/otptextview/ExampleInstrumentedTest.kt

@@ -0,0 +1,23 @@
+package `in`.aabhasjindal.otptextview
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see [Testing documentation](http://d.android.com/tools/testing)
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getTargetContext()
+
+        assertEquals("in.aabhasjindal.otptextview.test", appContext.getPackageName())
+    }
+}