diff --git a/android/quest/build.gradle b/android/quest/build.gradle
index 5f3d9bc..49575cc 100644
--- a/android/quest/build.gradle
+++ b/android/quest/build.gradle
@@ -64,13 +64,13 @@ def ver_tag = "git describe --tags --abbrev=0".execute().text.trim()
 println classpath
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 28
     android.buildToolsVersion "28.0.3"
 
     defaultConfig {
         applicationId = 'com.omixlab.panopainter'
-        minSdkVersion   21
-        targetSdkVersion 26
+        minSdkVersion   23
+        targetSdkVersion 28
         versionCode ver_count
         versionName "${ver_tag}.${ver_count}"
         // This block is different from the one you use to link Gradle
diff --git a/android/quest/src/main/AndroidManifest.xml b/android/quest/src/main/AndroidManifest.xml
index 9f1033e..d136bd7 100644
--- a/android/quest/src/main/AndroidManifest.xml
+++ b/android/quest/src/main/AndroidManifest.xml
@@ -18,8 +18,10 @@
             android:value="vr_only"/>
         <activity android:name=".MainActivity"
             android:label="@string/app_name"
+            android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"
             android:launchMode="singleTask"
-            android:configChanges="screenSize|screenLayout|orientation|keyboardHidden|keyboard|navigation|uiMode"
+            android:configChanges="density|keyboard|keyboardHidden|navigation|orientation|screenLayout|screenSize|uiMode"
+            android:resizeableActivity="false"
             android:excludeFromRecents="true"
             android:screenOrientation="landscape">
             <meta-data android:name="android.app.lib_name"
diff --git a/scripts/pre-build.py b/scripts/pre-build.py
index ee05aad..15c6a02 100644
--- a/scripts/pre-build.py
+++ b/scripts/pre-build.py
@@ -8,6 +8,10 @@ branch = check_output(["git", "rev-parse", "--abbrev-ref", "HEAD"]).rstrip().dec
 shorthash = check_output(["git", "log", "--pretty=format:%h", "-n 1"]).rstrip().decode("utf-8")
 revcount = int(check_output(["git", "rev-list", "--count", "HEAD"]))
 tag = check_output(["git", "describe", "--tags", "--abbrev=0"]).rstrip().decode("utf-8").split('-',1)[0]
+if len(sys.argv) < 2:
+    print("pre-build.py failed")
+    exit(0)
+    
 config = sys.argv[1].lower()
 
 version = "%s.%d (%s-%s-%s)" % (tag, revcount, shorthash, branch, config)