diff --git a/app/src/main/java/jp/atled/agileworks/view/ui/DirectOpenDocumentActivity.kt b/app/src/main/java/jp/atled/agileworks/view/ui/DirectOpenDocumentActivity.kt
index fb85145013b4416222b00d6ae1352ca528a74072..d3584ec392a056feaf59f48e341fd78c95349450 100644
--- a/app/src/main/java/jp/atled/agileworks/view/ui/DirectOpenDocumentActivity.kt
+++ b/app/src/main/java/jp/atled/agileworks/view/ui/DirectOpenDocumentActivity.kt
@@ -13,8 +13,11 @@ import jp.atled.agileworks.view.ui.documentweb.DocumentWebFragment
 import jp.atled.agileworks.view.utils.putExtraNonNullString
 import jp.atled.agileworks.view.utils.putNonNullStingFromExtra
 import kotlinx.android.synthetic.main.activity_main.*
+import android.view.KeyEvent
+import android.view.View
+import android.widget.Button
 
-class DirectOpenDocumentActivity : BaseActivity() {
+class DirectOpenDocumentActivity : BaseActivity(), View.OnClickListener {
     private val TAG = "DirectOpenDocumentActivity"
 
     private lateinit var directOpenControl: DirectOpenControl
@@ -29,11 +32,20 @@ class DirectOpenDocumentActivity : BaseActivity() {
         toolbar.title = title()
         setSupportActionBar(toolbar)
         setupDrawerMenu()
+        findViewById<Button>(R.id.close_btn).setOnClickListener(this);
 
         supportFragmentManager.beginTransaction()
                 .replace(R.id.direct_open_webview_fragment, documentWebFragment())
                 .commit()
     }
+    //閉じるボタンが押された処理
+    override fun onClick(v: View?) {
+        var event = KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_BACK)
+        dispatchKeyEvent(event)
+        event = KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_BACK)
+        dispatchKeyEvent(event)
+    }
+
 
     private fun title() = intent.getStringExtra("title") ?: ""
 
diff --git a/app/src/main/res/layout/activity_direct_open_document.xml b/app/src/main/res/layout/activity_direct_open_document.xml
index 8dcb7543528cd7c815f108e15531d069c0384781..ce26c96edfbe89fc7dc3563ead5dbd25d49df33e 100644
--- a/app/src/main/res/layout/activity_direct_open_document.xml
+++ b/app/src/main/res/layout/activity_direct_open_document.xml
@@ -27,7 +27,18 @@
                     android:layout_width="match_parent"
                     android:layout_height="?attr/actionBarSize"
                     android:background="?attr/colorPrimary"
-                    app:popupTheme="@style/AppTheme.PopupOverlay" />
+                    app:popupTheme="@style/AppTheme.PopupOverlay">
+
+                    <Button
+                        android:id="@+id/close_btn"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:background="#00000000"
+                        android:layout_gravity="right"
+                        android:layout_centerVertical="true"
+                        android:text="@string/notification_channel_close" />
+
+                </androidx.appcompat.widget.Toolbar>
 
             </com.google.android.material.appbar.AppBarLayout>
 
diff --git a/app/src/main/res/values-en/strings.xml b/app/src/main/res/values-en/strings.xml
index b6c4f408b1254400b716143d39f27e95fddf43e1..995faf07266e463b4ce97096af50874a1dc8a45d 100644
--- a/app/src/main/res/values-en/strings.xml
+++ b/app/src/main/res/values-en/strings.xml
@@ -72,6 +72,7 @@
     <string name="notification_channel_id_document">document</string>
     <string name="notification_channel_name_document">document notification</string>
     <string name="notification_channel_description_document">Notification of document status will be given.</string>
+    <string name="notification_channel_close">Close</string>
 
     <string name="notification_channel_id_download">download</string>
     <string name="notification_channel_name_download">Download Notification</string>
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 266f740127e6d4865b9875dc550fcd6518a0d37a..361ad358b0c84d025906a1f6ee6699b9e5fe6d5a 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -72,6 +72,7 @@
     <string name="notification_channel_id_document">document</string>
     <string name="notification_channel_name_document">書類通知</string>
     <string name="notification_channel_description_document">書類状態の通知が行われます。</string>
+    <string name="notification_channel_close">閉じる</string>
 
     <string name="notification_channel_id_download">download</string>
     <string name="notification_channel_name_download">ダウンロード通知</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 6c47e39a76ea428295a3cebacbf1515a7f332c3e..e0a5421c727378a3539a92ab122fb15de6b300b8 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -72,6 +72,7 @@
     <string name="notification_channel_id_document">document</string>
     <string name="notification_channel_name_document">文件通知</string>
     <string name="notification_channel_description_document">提供文件狀態的通知。</string>
+    <string name="notification_channel_close">關閉</string>
 
     <string name="notification_channel_id_download">download</string>
     <string name="notification_channel_name_download">下載通知</string>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index d2cb72f4dbe2aa7e22e151598775d1f0f2f0ced0..861b791405b8b8e9a710b3ce74bca3180d3795b1 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -72,6 +72,7 @@
     <string name="notification_channel_id_document">document</string>
     <string name="notification_channel_name_document">文件通知</string>
     <string name="notification_channel_description_document">提供文件状态的通知。</string>
+    <string name="notification_channel_close">关闭</string>
 
     <string name="notification_channel_id_download">download</string>
     <string name="notification_channel_name_download">下载通知</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 266f740127e6d4865b9875dc550fcd6518a0d37a..361ad358b0c84d025906a1f6ee6699b9e5fe6d5a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -72,6 +72,7 @@
     <string name="notification_channel_id_document">document</string>
     <string name="notification_channel_name_document">書類通知</string>
     <string name="notification_channel_description_document">書類状態の通知が行われます。</string>
+    <string name="notification_channel_close">閉じる</string>
 
     <string name="notification_channel_id_download">download</string>
     <string name="notification_channel_name_download">ダウンロード通知</string>
diff --git a/gradle/wrapper/gradle-7.0.2-all.zip b/gradle/wrapper/gradle-7.0.2-all.zip
deleted file mode 100644
index 2851666d247972b37c0827bcf0d4d7409fc39a01..0000000000000000000000000000000000000000
Binary files a/gradle/wrapper/gradle-7.0.2-all.zip and /dev/null differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 418196d68e1bda8a09666f9ca63a0b7e4923bea2..e58cdc6383820cb358b24487e110994f23b252f5 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=gradle-7.0.2-all.zip
+#distributionUrl=gradle-7.0.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip