From 00e3d842b3d8b6ac79a2999f609caf67397d4b9e Mon Sep 17 00:00:00 2001
From: hyooosong <gythd1998@gmail.com>
Date: Fri, 1 Jan 2021 11:16:21 +0900
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Step.03 dataBinding_onClick event

Related to : #2, #6, #9
---
 .../practicegitanddatabinding/MainActivity.kt | 28 +++++--------------
 app/src/main/res/layout/activity_main.xml     | 12 ++++----
 2 files changed, 14 insertions(+), 26 deletions(-)

diff --git a/app/src/main/java/sotp/semina/practicegitanddatabinding/MainActivity.kt b/app/src/main/java/sotp/semina/practicegitanddatabinding/MainActivity.kt
index 85d8dde..b0184d6 100644
--- a/app/src/main/java/sotp/semina/practicegitanddatabinding/MainActivity.kt
+++ b/app/src/main/java/sotp/semina/practicegitanddatabinding/MainActivity.kt
@@ -1,45 +1,31 @@
 package sotp.semina.practicegitanddatabinding
 
 import android.os.Bundle
-import android.widget.EditText
 import androidx.appcompat.app.AppCompatActivity
 import androidx.databinding.DataBindingUtil
+import androidx.databinding.ObservableField
 import sotp.semina.practicegitanddatabinding.databinding.ActivityMainBinding
 
 class MainActivity : AppCompatActivity() {
 
-    /* TODO step4 설계 변경이 일어납니다 binding 을 전역 클래스 맴버 변수로 올리고
-    *   양방향 데이터 바인딩을 위한 ObservableField 를 작성합니다
-    *  이 과정에서 하단 getEditTextToString이 사라질 수 있습니다.*/
+    private lateinit var binding: ActivityMainBinding
+    val editText = ObservableField<String>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        val binding: ActivityMainBinding =
-            DataBindingUtil.setContentView(this, R.layout.activity_main)
+        binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
         binding.userProfile = UserData(IMAGE_URL, DEFAULT_USER_NAME)
-        /*TODO step2 엑티비티를 결합하였으므로 binding에 엑티비티를 결합한다.*/
-        addButtonClickEvent(binding)
+        binding.mainActivity=this
     }
 
     private fun setProfileName(binding: ActivityMainBinding, content: String) {
         binding.userProfile = UserData(IMAGE_URL,content)
     }
 
-    /*TODO step3 해당 함수를 버튼이 클릭 되었을때 어떤 일이 일어날지 수정합시다.
-    *  필요시 다른 함수를 수정해야함.*/
-    private fun addButtonClickEvent(binding: ActivityMainBinding) {
-        binding.buttonProfileChangeButton.setOnClickListener {
-            setProfileName(
-                binding,
-                getEditTextToString(binding.inputChangedProfile)
-            )
-        }
+    fun ChangeUserNameClickEvent() {
+        setProfileName(binding, editText.get()?: DEFAULT_USER_NAME)
     }
 
-
-    private fun getEditTextToString(content: EditText): String = content.text.toString()
-
-
     companion object {
         private const val IMAGE_URL =
             "https://avatars3.githubusercontent.com/u/45380072?s=460&u=b9fc82996ec2cc568a7dfcbf8846944dc16a7ccd&v=4"
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 6eebcf3..bed4e68 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -8,7 +8,9 @@
             name="userProfile"
             type="sotp.semina.practicegitanddatabinding.UserData" />
 
-        <!--TODO step1 변수로 Activity를 결합합니다.-->
+        <variable
+            name="mainActivity"
+            type="sotp.semina.practicegitanddatabinding.MainActivity" />
     </data>
 
     <androidx.constraintlayout.widget.ConstraintLayout
@@ -40,7 +42,6 @@
             app:layout_constraintTop_toBottomOf="@+id/image_profile_image"
             tools:text="profile name" />
 
-        <!--TODO step5 양방향 데이터 결합-->
         <EditText
             android:id="@+id/input_changed_profile"
             android:layout_width="match_parent"
@@ -50,9 +51,9 @@
             android:layout_marginEnd="16dp"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@+id/text_profile_name" />
+            app:layout_constraintTop_toBottomOf="@+id/text_profile_name"
+            android:text="@={mainActivity.editText}"/>
 
-        <!--TODO step6 결합한 Activity의 함수를 onClick에 결합합니다.-->
         <Button
             android:id="@+id/button_profile_change_button"
             android:layout_width="match_parent"
@@ -63,7 +64,8 @@
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
             android:text="Change"
-            app:layout_constraintTop_toBottomOf="@+id/input_changed_profile" />
+            app:layout_constraintTop_toBottomOf="@+id/input_changed_profile"
+            android:onClick="@{()->mainActivity.ChangeUserNameClickEvent()}"/>
 
     </androidx.constraintlayout.widget.ConstraintLayout>
 </layout>
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