convert to kotlin from java

app/build.gradle

@@ -1,4 +1,6 @@
 apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion rootProject.ext.compileSdkVersion
@@ -22,11 +24,15 @@ android {
     }
 
     // If you need to add more flavors, consider using flavor dimensions.
+    flavorDimensions "flavor"
     productFlavors {
         mock {
+            dimension "flavor"
+
             applicationIdSuffix = ".mock"
         }
         prod {
+            dimension "flavor"
 
         }
     }
@@ -52,6 +58,9 @@ android {
  all versions in a single place. This improves readability and helps managing project complexity.
  */
 dependencies {
+    // Kotlin
+    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
+
     // App's dependencies, including test
     compile "com.android.support:appcompat-v7:$rootProject.supportLibraryVersion"
     compile "com.android.support:cardview-v7:$rootProject.supportLibraryVersion"

app/src/androidTestMock/java/com/example/android/testing/notes/notedetail/NoteDetailScreenTest.java

@@ -92,7 +92,7 @@ public void intentWithStubbedNoteId() {
 
         // Lazily start the Activity from the ActivityTestRule this time to inject the start Intent
         Intent startIntent = new Intent();
-        startIntent.putExtra(NoteDetailActivity.EXTRA_NOTE_ID, NOTE.getId());
+        startIntent.putExtra(NoteDetailActivity.Companion.getEXTRA_NOTE_ID(), NOTE.getId());
         mNoteDetailActivityTestRule.launchActivity(startIntent);
 
         registerIdlingResource();

app/src/main/java/com/example/android/testing/notes/addnote/AddNoteActivity.kt

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2015, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.testing.notes.addnote
+
+import android.os.Bundle
+import android.support.annotation.VisibleForTesting
+import android.support.test.espresso.IdlingResource
+import android.support.v4.app.Fragment
+import android.support.v7.app.AppCompatActivity
+import com.example.android.testing.notes.R
+import com.example.android.testing.notes.util.EspressoIdlingResource
+import kotlinx.android.synthetic.main.activity_addnote.*
+
+/**
+ * Displays an add note screen.
+ */
+class AddNoteActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_addnote)
+
+        // Set up the toolbar.
+        setSupportActionBar(toolbar)
+        supportActionBar?.run {
+            setTitle(R.string.add_note)
+            setDisplayHomeAsUpEnabled(true)
+            setDisplayShowHomeEnabled(true)
+        }
+
+        if (null == savedInstanceState) {
+            initFragment(AddNoteFragment.newInstance())
+        }
+    }
+
+    override fun onSupportNavigateUp(): Boolean {
+        onBackPressed()
+        return true
+    }
+
+    private fun initFragment(detailFragment: Fragment) {
+        // Add the AddNoteFragment to the layout
+        supportFragmentManager
+                .beginTransaction()
+                .add(R.id.contentFrame, detailFragment)
+                .commit()
+    }
+
+    val countingIdlingResource: IdlingResource
+        @VisibleForTesting
+        get() = EspressoIdlingResource.idlingResource
+}

app/src/main/java/com/example/android/testing/notes/notedetail/NoteDetailContract.java → app/src/main/java/com/example/android/testing/notes/addnote/AddNoteContract.kt

@@ -14,36 +14,37 @@
  * limitations under the License.
  */
 
-package com.example.android.testing.notes.notedetail;
+package com.example.android.testing.notes.addnote
 
-import android.support.annotation.Nullable;
+import java.io.IOException
 
 /**
  * This specifies the contract between the view and the presenter.
  */
-public interface NoteDetailContract {
+interface AddNoteContract {
 
     interface View {
 
-        void setProgressIndicator(boolean active);
+        fun showEmptyNoteError()
 
-        void showMissingNote();
+        fun showNotesList()
 
-        void hideTitle();
+        fun openCamera(saveTo: String)
 
-        void showTitle(String title);
+        fun showImagePreview(uri: String)
 
-        void showImage(String imageUrl);
+        fun showImageError()
+    }
 
-        void hideImage();
+    interface UserActionsListener {
 
-        void hideDescription();
+        fun saveNote(title: String, description: String)
 
-        void showDescription(String description);
-    }
+        @Throws(IOException::class)
+        fun takePicture()
 
-    interface UserActionsListener {
+        fun imageAvailable()
 
-        void openNote(@Nullable String noteId);
+        fun imageCaptureFailed()
     }
 }