diff --git a/.idea/misc.xml b/.idea/misc.xml
index f4425448..c91ec4cc 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -44,7 +44,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" project-jdk-name="JDK" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt b/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt
index 04859d78..72ac6a39 100644
--- a/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt
+++ b/app/src/main/java/jp/juggler/subwaytooter/ActMain.kt
@@ -7,6 +7,7 @@ import android.content.Intent
 import android.content.SharedPreferences
 import android.content.pm.PackageManager
 import android.content.res.ColorStateList
+import android.content.res.Configuration
 import android.graphics.Typeface
 import android.net.Uri
 import android.os.*
@@ -487,6 +488,14 @@ class ActMain : AppCompatActivity()
 		log.w("onNewIntent: isResumed = isResumed")
 	}
 	
+	override fun onConfigurationChanged(newConfig : Configuration) {
+		log.d("onConfigurationChanged")
+		super.onConfigurationChanged(newConfig)
+		if(newConfig.screenHeightDp > 0 || newConfig.screenHeightDp >0){
+			tabOnly { env -> resizeColumnWidth(env) }
+		}
+	}
+	
 	override fun onSaveInstanceState(outState : Bundle) {
 		super.onSaveInstanceState(outState)
 		
@@ -2535,6 +2544,7 @@ class ActMain : AppCompatActivity()
 		
 		if(screen_width < column_w_min * 2) {
 			// 最小幅で2つ表示できないのなら1カラム表示
+			nScreenColumn = 1
 			column_w = screen_width
 		} else {