diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index 5faab08..c44f573 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -1,23 +1,48 @@
 name: Android CI
 
-on: [push]
+on:
+  push:
+  release:
+    types: [published, prereleased]
+  workflow_dispatch:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: set up JDK 1.8
-      uses: actions/setup-java@v1
-      with:
-        java-version: 1.8
-    - name: Build with Gradle
-      run: chmod +x ./gradlew && ./gradlew build
-
-    - name: Upload APK
-      uses: actions/upload-artifact@v2
-      with:
-        name: app
-        path: app/**/*.apk
+      - uses: actions/checkout@v3
+
+      - name: set up JDK 1.8
+        uses: actions/setup-java@v3
+        with:
+          distribution: "zulu"
+          java-version: "8"
+
+      - name: Decode keystore
+        run: |
+          if [ -n "$KEYSTORE_BASE64" ]; then
+            echo "$KEYSTORE_BASE64" | base64 --decode > release.keystore
+          fi
+        env:
+          KEYSTORE_BASE64: ${{ secrets.KEYSTORE_BASE64 }}
+
+      - name: Build with Gradle
+        run: chmod +x ./gradlew && ./gradlew build
+        env:
+          KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
+          KEY_ALIAS: ${{ secrets.KEY_ALIAS }}
+          KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: app
+          path: app/**/*.apk
+
+      - name: Upload release assets
+        if: ${{ github.event_name == 'release' }}
+        uses: shogo82148/actions-upload-release-asset@v1
+        with:
+          upload_url: ${{ github.event.release.upload_url }}
+          asset_path: "app/**/*.apk"
diff --git a/.gitignore b/.gitignore
index 7bdfe81..46ffc21 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,6 +38,7 @@ captures/
 
 # Keystore files
 *.jks
+*.keystore
 
 # External native build folder generated in Android Studio 2.2 and later
 .externalNativeBuild
@@ -49,3 +50,6 @@ google-services.json
 freeline.py
 freeline/
 freeline_project_description.json
+
+# vim tmp file
+*.swp
diff --git a/app/build.gradle b/app/build.gradle
index 4f38580..bfa5720 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -10,10 +10,21 @@ android {
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
+    signingConfigs {
+      release {
+        storeFile rootProject.file('release.keystore')
+        storePassword System.getenv('KEYSTORE_PASSWORD')
+        keyAlias System.getenv('KEY_ALIAS')
+        keyPassword System.getenv('KEY_PASSWORD')
+      }
+    }
     buildTypes {
         release {
-            minifyEnabled false
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            if (rootProject.file('release.keystore').exists()) {
+                signingConfig signingConfigs.release
+            }
         }
     }
 }
diff --git a/app/src/main/java/io/github/tmatz/hackers_unistroke_keyboard/GestureInputMethod.java b/app/src/main/java/io/github/tmatz/hackers_unistroke_keyboard/GestureInputMethod.java
index 3d0125a..52e04e8 100644
--- a/app/src/main/java/io/github/tmatz/hackers_unistroke_keyboard/GestureInputMethod.java
+++ b/app/src/main/java/io/github/tmatz/hackers_unistroke_keyboard/GestureInputMethod.java
@@ -16,6 +16,7 @@
 import android.widget.Button;
 import android.widget.TextView;
 import android.widget.Toast;
+import android.view.inputmethod.*;
 
 public class GestureInputMethod
 extends InputMethodService
@@ -101,6 +102,15 @@ public void performEditorAction()
         getCurrentInputConnection().performEditorAction(getEditorAction());
     }
 
+    public void showInputMethodPicker()
+    {
+        InputMethodManager manager = (InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
+        if (manager != null)
+        {
+            manager.showInputMethodPicker();
+        }
+    }
+
     public void sendText(String str)
     {
         getCurrentInputConnection().commitText(str, str.length());
@@ -238,13 +248,20 @@ private void setupExtendKey(final View view)
 
             keyboardArea.setVisibility(View.INVISIBLE);
 
-            extendKey.setOnClickListener(
-                new OnClickListener()
-                {
+            extendKey.setOnTouchListener(
+                new OnTouchGestureListener(view.getContext())
+                {           
                     @Override
-                    public void onClick(View v)
+                    public boolean onSingleTapUp(MotionEvent e)
                     {
                         toggleKeyboadOn();
+                        return true;
+                    }
+                    
+                    @Override
+                    public void onLongPress(MotionEvent e)
+                    {
+                        showInputMethodPicker();
                     }
 
                     private void toggleKeyboadOn()
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 25ea203..8d6d849 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">Hacker\'s Unistroke Keyboard</string>
+    <string name="app_name">Unistroke Keyboard</string>
     <string name="ime_name">Unistroke</string>
 </resources>