diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 9bba60d..526b4c2 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -4,7 +4,7 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="PLATFORM" />
+        <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">
@@ -14,7 +14,6 @@
           </set>
         </option>
         <option name="resolveModulePerSourceSet" value="false" />
-        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/app/build.gradle b/app/build.gradle
index 7cc8827..4432676 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -27,8 +27,8 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility = '1.8'
-        targetCompatibility = '1.8'
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
     testOptions {
         unitTests {
@@ -45,8 +45,6 @@ android {
 }
 
 dependencies {
-    def room_version = "2.2.5"
-
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'com.google.android.material:material:1.3.0-beta01'
@@ -63,6 +61,9 @@ dependencies {
     kapt "androidx.room:room-compiler:$room_version"
     androidTestImplementation "androidx.room:room-testing:$room_version"
 
+    // jsoup
+    implementation 'org.jsoup:jsoup:1.13.1'
+
     // test implementation
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'
@@ -107,7 +108,6 @@ dependencies {
     kapt 'com.github.bumptech.glide:compiler:4.9.0'
 
     // jsoup, anko
-    implementation 'org.jsoup:jsoup:1.11.3'
     implementation "org.jetbrains.anko:anko:$rootProject.anko_version"
     implementation 'androidx.gridlayout:gridlayout:1.0.0'
 
diff --git a/app/src/main/java/com/seok/gfd/utils/CommonUtils.kt b/app/src/main/java/com/seok/gfd/utils/CommonUtils.kt
deleted file mode 100644
index 64a4edf..0000000
--- a/app/src/main/java/com/seok/gfd/utils/CommonUtils.kt
+++ /dev/null
@@ -1,32 +0,0 @@
-package com.seok.gfd.utils
-
-import com.google.gson.Gson
-import com.google.gson.GsonBuilder
-
-class CommonUtils private constructor(){
-    private object INSTANCE{
-        val instance = CommonUtils()
-        val gson = GsonBuilder().create()
-    }
-
-    private var screenWidth = 0f
-    private var screenHeight = 0f
-
-    companion object{
-        val instance : CommonUtils by lazy { INSTANCE.instance }
-        val gson : Gson by lazy { INSTANCE.gson }
-    }
-
-    fun getScreenWidth(): Float {
-        return screenWidth
-    }
-    fun setScreenWidth(screenWidth: Float){
-        this.screenWidth = screenWidth
-    }
-    fun getScreenHeight(): Float{
-        return screenHeight
-    }
-    fun setScreenHeight(screenHeight : Float){
-        this.screenHeight = screenHeight
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/seok/gfd/utils/ValidationCheck.kt b/app/src/main/java/com/seok/gfd/utils/ValidationCheck.kt
new file mode 100644
index 0000000..22b6991
--- /dev/null
+++ b/app/src/main/java/com/seok/gfd/utils/ValidationCheck.kt
@@ -0,0 +1,17 @@
+package com.seok.gfd.utils
+
+class ValidationCheck {
+    companion object {
+        fun validIsEmptyString(str: String): Boolean {
+            return str.isEmpty() || str == ""
+        }
+
+        fun isExistSite(str: String): Boolean{
+            val url = "https://github.com/$str"
+
+
+
+            return true
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/seok/gfd/v1/views/MainFragment.kt b/app/src/main/java/com/seok/gfd/v1/views/MainFragment.kt
index 8345f73..0a3a10a 100644
--- a/app/src/main/java/com/seok/gfd/v1/views/MainFragment.kt
+++ b/app/src/main/java/com/seok/gfd/v1/views/MainFragment.kt
@@ -17,15 +17,14 @@ import com.ogaclejapan.smarttablayout.utils.v4.FragmentPagerItems
 import com.seok.gfd.R
 import com.seok.gfd.retrofit.domain.User
 import com.seok.gfd.retrofit.domain.resopnse.CommitsResponseDto
-import com.seok.gfd.utils.CommonUtils
 import com.seok.gfd.utils.ProgressbarDialog
 import com.seok.gfd.utils.SharedPreference
+import com.seok.gfd.utils.ValidationCheck
 import com.seok.gfd.viewmodel.GithubContributionViewModel
 import kotlinx.android.synthetic.main.fragment_main.*
 import java.time.LocalDate
 
 class MainFragment : Fragment() {
-    private lateinit var commonUtils: CommonUtils
     private lateinit var sharedPreference: SharedPreference
     private lateinit var progressbar: ProgressbarDialog
     private lateinit var githubContributionViewModel: GithubContributionViewModel
@@ -52,7 +51,6 @@ class MainFragment : Fragment() {
         progressbar.show()
         sharedPreference = SharedPreference(this.activity!!.application)
         user = sharedPreference.getValueObject(getString(R.string.user_info))
-        commonUtils = CommonUtils.instance
         githubContributionViewModel =
             ViewModelProviders.of(this).get(GithubContributionViewModel::class.java)
         githubContributionViewModel.getContributions(user.login)
@@ -79,9 +77,6 @@ class MainFragment : Fragment() {
 
     private fun initSetUI() {
         main_tv_today.text = LocalDate.now().toString()
-        main_top_scalable_layout.scaleWidth = commonUtils.getScreenWidth()
-        main_top_scalable_layout.scaleHeight = commonUtils.getScreenHeight()
-
         main_tv_user_name.text = user.login
 
         val requestOptions = RequestOptions().transform(CenterCrop(), RoundedCorners(50))
diff --git a/app/src/main/java/com/seok/gfd/v1/views/MainSub.kt b/app/src/main/java/com/seok/gfd/v1/views/MainSub.kt
index 8985582..c4fd288 100644
--- a/app/src/main/java/com/seok/gfd/v1/views/MainSub.kt
+++ b/app/src/main/java/com/seok/gfd/v1/views/MainSub.kt
@@ -12,7 +12,6 @@ import androidx.fragment.app.Fragment
 import com.ogaclejapan.smarttablayout.utils.v4.Bundler
 import com.seok.gfd.R
 import com.seok.gfd.retrofit.domain.resopnse.CommitsResponseDto
-import com.seok.gfd.utils.CommonUtils
 import kotlinx.android.synthetic.main.fragment_main_sub.*
 import org.jetbrains.anko.backgroundColor
 import org.jetbrains.anko.textColor
@@ -27,8 +26,8 @@ class MainSub : Fragment() {
 
     companion object {
         fun arguments(param: CommitsResponseDto): Bundle {
-            val str = CommonUtils.gson.toJson(param)
-            return Bundler().putString("year", str).get()
+//            val str = CommonUtils.gson.toJson(param)
+            return Bundler().putString("year", "str").get()
         }
     }
 
@@ -55,7 +54,6 @@ class MainSub : Fragment() {
 
     private fun init() {
         val yearContribution = arguments?.getString("year")
-        commitResponse = CommonUtils.gson.fromJson(yearContribution, CommitsResponseDto::class.java)
     }
 
     private fun createContributionUI(commitSize: Int, startDay: Int, commits : List<CommitsResponseDto.Contribution>) {
diff --git a/app/src/main/java/com/seok/gfd/views/SearchActivity.kt b/app/src/main/java/com/seok/gfd/views/SearchActivity.kt
index 5176e6b..0479212 100644
--- a/app/src/main/java/com/seok/gfd/views/SearchActivity.kt
+++ b/app/src/main/java/com/seok/gfd/views/SearchActivity.kt
@@ -3,6 +3,7 @@ package com.seok.gfd.views
 import android.os.Bundle
 import android.text.Editable
 import android.text.TextWatcher
+import android.view.View
 import android.view.WindowManager
 import android.view.animation.AnimationUtils
 import androidx.appcompat.app.AppCompatActivity
@@ -11,9 +12,11 @@ import androidx.lifecycle.ViewModelProviders
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
+import com.google.android.material.snackbar.Snackbar
 import com.seok.gfd.R
 import com.seok.gfd.adapter.SearchGithubIdAdapter
 import com.seok.gfd.room.entity.SearchGithubId
+import com.seok.gfd.utils.ValidationCheck
 import com.seok.gfd.viewmodel.GithubIdViewModel
 import kotlinx.android.synthetic.main.activity_search.*
 
@@ -36,12 +39,6 @@ class SearchActivity : AppCompatActivity() {
     }
 
     private fun setListener() {
-        // EditText 포커싱 되었을 때
-//        search_edt_id.onFocusChangeListener = OnFocusChangeListener { _, hasFocus ->
-//            if (hasFocus) {
-//                githubIdsViewModel.getGithubId("")
-//            }
-//        }
         search_edt_id.addTextChangedListener(object : TextWatcher {
             override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {
                 githubIdsViewModel.getGithubId(search_edt_id.text.toString())
@@ -55,7 +52,16 @@ class SearchActivity : AppCompatActivity() {
         })
 
         search_btn_ok.setOnClickListener {
-            githubIdsViewModel.insertGithubId(SearchGithubId(search_edt_id.text.toString()))
+            val githubId = search_edt_id.text.toString()
+            if(ValidationCheck.validIsEmptyString(githubId)){
+                Snackbar.make(search_main_layout, "아이디칸이 비어있네요!", Snackbar.LENGTH_SHORT).show()
+            }else{
+                if(ValidationCheck.isExistSite(githubId)){
+
+                }else{
+                    Snackbar.make(search_main_layout, "존재하지 않는 아이디 같아요.\n문제가 생겼다면 개발자에게 문의해주세요!", Snackbar.LENGTH_SHORT).show()
+                }
+            }
         }
 
         // githubIdsViewModel.closeDatabase() db 컨넥션 끊기
diff --git a/app/src/main/res/layout/activity_search.xml b/app/src/main/res/layout/activity_search.xml
index d9c7523..304d0d8 100644
--- a/app/src/main/res/layout/activity_search.xml
+++ b/app/src/main/res/layout/activity_search.xml
@@ -2,6 +2,7 @@
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
         xmlns:tools="http://schemas.android.com/tools"
+        android:id="@+id/search_main_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         tools:context=".views.SearchActivity">
diff --git a/app/src/main/res/layout/item_search_github_id.xml b/app/src/main/res/layout/item_search_github_id.xml
index 8d0a956..6097228 100644
--- a/app/src/main/res/layout/item_search_github_id.xml
+++ b/app/src/main/res/layout/item_search_github_id.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:app="http://schemas.android.com/apk/res-auto"
-        xmlns:tools="http://schemas.android.com/tools"
         android:layout_width="match_parent"
         android:layout_height="50dp">
 
diff --git a/build.gradle b/build.gradle
index 17c138e..52e53d4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,10 +2,10 @@
 
 buildscript {
     ext {
-        kotlin_version = '1.3.21'
+        kotlin_version = '1.4.21'
         coroutine_version = '1.0.0'
-        anko_version = '0.10.5'
-        room_version = '1.1.1'
+        anko_version = '0.10.8'
+        room_version = '2.2.5'
         archlifecycle_version = '1.1.1'
     }
     repositories {
@@ -20,8 +20,11 @@ buildscript {
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
+
 }
 
+
+
 allprojects {
     repositories {
         google()