Creating a TO DO app in kotlin using TDD and MVP architechure.

.gitignore

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+*.iml
+.gradle
+gradle.properties
+/local.properties
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+apply plugin: 'kotlin-android'
+
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 26
+    defaultConfig {
+        applicationId "com.todo.todokotlinmvp"
+        minSdkVersion 15
+        targetSdkVersion 26
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
+    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+
+    testImplementation group: 'com.nhaarman', name: 'mockito-kotlin', version: '1.5.0'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.todo.todokotlinmvp">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name="com.todo.view.home.ToDoHomeActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity android:name="com.todo.view.addToDo.AddToDoActivity"/>
+    </application>
+
+</manifest>

app/src/main/java/com/todo/constants/Constants.kt

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+package com.todo.constants
+
+const val ADD_TO_DO_REQUEST_CODE = 1111
+const val ADD_TO_DO_RESULT_CODE = 2222
+const val ADD_TO_DO_KEY = "addToDoMsg"

app/src/main/java/com/todo/presenter/AddToDoPresenter.kt

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+package com.todo.presenter
+
+import com.todo.constants.ADD_TO_DO_KEY
+import com.todo.constants.ADD_TO_DO_RESULT_CODE
+import com.todo.view.addToDo.AddToDoView
+
+class AddToDoPresenter(val view: AddToDoView) {
+
+    fun onSaveToDo() {
+
+        view.getMessageView()?.text.let {
+            if(it.toString().isNotBlank()) {
+                view.setResultMessage(ADD_TO_DO_RESULT_CODE, view.getMessageView()?.text.toString(), ADD_TO_DO_KEY)
+                view.finishView()
+            }
+        }
+    }
+}

app/src/main/java/com/todo/presenter/ToDoHomePresenter.kt

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+package com.todo.presenter
+
+import android.content.Intent
+import android.widget.ArrayAdapter
+import com.todo.constants.ADD_TO_DO_KEY
+import com.todo.constants.ADD_TO_DO_REQUEST_CODE
+import com.todo.constants.ADD_TO_DO_RESULT_CODE
+import com.todo.view.addToDo.AddToDoActivity
+import com.todo.view.home.ToDoHomeView
+
+class ToDoHomePresenter(val view: ToDoHomeView, val toDoListAdapter: ArrayAdapter<String>) {
+
+    fun onViewCreated() {
+        view.getToDoListView()?.adapter = this.toDoListAdapter
+    }
+
+    fun onAddNewTodo() {
+        view.startNewIntent(destination = AddToDoActivity::class, requestCode = ADD_TO_DO_REQUEST_CODE)
+    }
+
+    fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        if (requestCode == ADD_TO_DO_REQUEST_CODE && resultCode == ADD_TO_DO_RESULT_CODE && data != null) {
+            this.toDoListAdapter.add(data.getStringExtra(ADD_TO_DO_KEY))
+            this.toDoListAdapter.notifyDataSetChanged()
+        }
+    }
+}

app/src/main/java/com/todo/view/addToDo/AddToDoActivity.kt

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+package com.todo.view.addToDo
+
+import android.content.Intent
+import android.os.Bundle
+import android.support.v7.app.AppCompatActivity
+import android.view.View
+import android.widget.EditText
+import com.todo.presenter.AddToDoPresenter
+import com.todo.todokotlinmvp.R
+
+class AddToDoActivity : AppCompatActivity(), AddToDoView {
+
+    private var message: EditText? = null
+    private var presenter: AddToDoPresenter? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.add_to_do_layout);
+        message = findViewById(R.id.new_msg);
+        presenter = AddToDoPresenter(this)
+    }
+
+    fun onSave(view: View) {
+        presenter?.onSaveToDo()
+    }
+
+    override fun getMessageView(): EditText? {
+        return message
+    }
+
+    override fun setResultMessage(resultCode: Int, resultMessage: String, addToDoKey: String) {
+        val out = Intent()
+        out.putExtra(addToDoKey, resultMessage)
+        setResult(resultCode, out)
+    }
+    override fun finishView() {
+        finish()
+    }
+}

app/src/main/java/com/todo/view/addToDo/AddToDoView.kt

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+package com.todo.view.addToDo
+
+import android.widget.EditText
+
+interface AddToDoView {
+    fun getMessageView(): EditText?
+    fun setResultMessage(resultCode: Int, resultMessage: String, addToDoKey: String)
+    fun finishView()
+}

app/src/main/java/com/todo/view/home/ToDoHomeActivity.kt

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+package com.todo.view.home
+
+import android.content.Intent
+import android.os.Bundle
+import android.support.v7.app.AppCompatActivity
+import android.view.View
+import android.widget.ArrayAdapter
+import android.widget.ListView
+import com.todo.presenter.ToDoHomePresenter
+import com.todo.todokotlinmvp.R
+import com.todo.view.addToDo.AddToDoActivity
+import kotlin.reflect.KClass
+
+class ToDoHomeActivity : AppCompatActivity(), ToDoHomeView {
+    private var homePresenter: ToDoHomePresenter? = null
+    private var toDoListView: ListView? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        val listAdapter = ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1)
+        homePresenter = ToDoHomePresenter(this, listAdapter)
+        toDoListView = findViewById(R.id.my_to_do_list)
+        homePresenter?.onViewCreated()
+    }
+
+    fun addNewTodo(addToDoButton: View) {
+        homePresenter?.onAddNewTodo()
+    }
+
+    override fun startNewIntent(destination: KClass<AddToDoActivity>, requestCode: Int) {
+        val intent = Intent(this, destination.java)
+        startActivityForResult(intent, requestCode)
+    }
+
+    override fun getToDoListView(): ListView? {
+        return toDoListView
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        homePresenter?.onActivityResult(requestCode, resultCode, data)
+    }
+}

app/src/main/java/com/todo/view/home/ToDoHomeView.kt

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+package com.todo.view.home
+
+import android.widget.ListView
+import com.todo.view.addToDo.AddToDoActivity
+import kotlin.reflect.KClass
+
+interface ToDoHomeView {
+    fun startNewIntent(destination: KClass<AddToDoActivity>, requestCode: Int)
+    fun getToDoListView(): ListView?
+}

app/src/main/res/drawable-v24/ic_launcher_foreground.xml

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+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportHeight="108"
+    android:viewportWidth="108">
+    <path
+        android:fillType="evenOdd"
+        android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="78.5885"
+                android:endY="90.9159"
+                android:startX="48.7653"
+                android:startY="61.0927"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z"
+        android:strokeColor="#00000000"
+        android:strokeWidth="1" />
+</vector>