Databinding

.idea/gradle.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>

app/build.gradle

@@ -20,6 +20,10 @@ android {
         enabled = true
     }
 
+    dataBinding {
+        enabled = true
+    }
+
     buildTypes {
         release {
             minifyEnabled false

app/src/main/java/dev/andrewkemp/aboutme/MainActivity.kt

@@ -1,15 +1,42 @@
 package dev.andrewkemp.aboutme
 
+import android.content.Context
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.view.View
+import android.view.inputmethod.InputMethodManager
+import androidx.databinding.DataBindingUtil
 import dev.andrewkemp.aboutme.databinding.ActivityMainBinding
+import kotlinx.android.synthetic.main.activity_main.*
 
 class MainActivity : AppCompatActivity() {
     private lateinit var binding: ActivityMainBinding
 
+    private var myName: MyName = MyName("Andrew Kemp")
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        binding = ActivityMainBinding.inflate(layoutInflater)
-        setContentView(R.layout.activity_main)
+        binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
+        binding.myName = myName
+        done_button.setOnClickListener {
+            addNickname(it)
+        }
+    }
+
+    private fun addNickname(view: View) {
+        binding.apply {
+            myName?.nickname = nicknameEdit.text.toString()
+            invalidateAll()
+            nicknameEdit.visibility = View.GONE
+            doneButton.visibility = View.GONE
+            nicknameText.visibility = View.VISIBLE
+        }
+
+        hideKeyboard(view)
+    }
+
+    private fun hideKeyboard(view: View) {
+        var imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
+        imm.hideSoftInputFromWindow(view.windowToken, 0)
     }
 }

app/src/main/java/dev/andrewkemp/aboutme/MyName.kt

@@ -0,0 +1,3 @@
+package dev.andrewkemp.aboutme
+
+data class MyName(var name: String = "", var nickname: String = "")

app/src/main/res/layout/activity_main.xml

@@ -1,6 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+<layout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+        <variable
+            name="myName"
+            type="dev.andrewkemp.aboutme.MyName" />
+    </data>
+
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical"
@@ -12,9 +21,39 @@
             style="@style/NameStyle"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-        android:text="@string/andrew_kemp"
+            android:text="@={myName.name}"
             android:textAlignment="center" />
 
+        <EditText
+            android:id="@+id/nickname_edit"
+            style="@style/NameStyle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:ems="10"
+            android:hint="@string/what_is_your_nickname"
+            android:importantForAutofill="no"
+            android:inputType="textMultiLine|textPersonName"
+            android:textAlignment="center" />
+
+        <Button
+            android:id="@+id/done_button"
+            style="@style/Widget.AppCompat.Button.Colored"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal"
+            android:layout_marginTop="@dimen/layout_margin"
+            android:fontFamily="@font/roboto"
+            android:text="@string/done" />
+
+        <TextView
+            android:id="@+id/nickname_text"
+            style="@style/NameStyle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="@={myName.nickname}"
+            android:textAlignment="center"
+            android:visibility="gone" />
+
         <ImageView
             android:id="@+id/star_image"
             android:layout_width="match_parent"
@@ -37,4 +76,5 @@
                 android:text="@string/bio" />
         </ScrollView>
 
-</LinearLayout>
+    </LinearLayout>
+</layout>

app/src/main/res/values/strings.xml

@@ -1,6 +1,5 @@
 <resources>
     <string name="app_name">About Me</string>
-    <string name="andrew_kemp">Andrew Kemp</string>
     <string name="yellow_star">Yellow Star</string>
     <string name="bio">
         Hi, my name is Andrew!
@@ -10,4 +9,6 @@
         \n\u2022 Avid video gamer, and world traveler
         \n\u2022 purveyor of marine life, and avid scuba diver
     </string>
+    <string name="what_is_your_nickname">What is your nickname?</string>
+    <string name="done">Done</string>
 </resources>