Use Gradle (#452)

31 files changed, 552 insertions, 228 deletions

diff --git a/.github/workflows/make-apk.yml b/.github/workflows/make-apk.yml
index f580d04..ea334de 100644
--- a/.github/workflows/make-apk.yml
+++ b/.github/workflows/make-apk.yml
@@ -12,36 +12,37 @@ jobs:
     - uses: actions/setup-java@v3
       with:
         distribution: 'zulu' # See 'Supported distributions' for available options
-        java-version: '11'
+        java-version: '17'
     - name: Checkout repo
       uses: actions/checkout@v3
-    - name: Cache debug certificate
-      uses: actions/cache@v3
-      with:
-        path: _build/debug.keystore
-        key: debug-keystore
-    - name: Restore debug keystore from github Secrets 
+    - name: Restore debug keystore from GitHub Secrets
       run: |
-        mkdir -p _build
-        cd "_build"
         # Check if exist and use the secret named DEBUG_KEYSTORE
         # The contents of the secret can be obtained -
-        #    from the debug.keystore.asc from you local _build folder
+        #    from the debug.keystore.asc from you local folder (refer to CONTRIBUTING.md#Using the local debug.keystore on the Github CI actions)
         if [[ ! "${{ secrets.DEBUG_KEYSTORE }}" = "" ]]; then
             echo "${{ secrets.DEBUG_KEYSTORE }}" > "debug.keystore.asc"
             if [[ -s "debug.keystore.asc" ]]; then
+                echo "Restoring debug keystore from GitHub secrets"
                 gpg -d --passphrase "debug0" --batch "debug.keystore.asc" > "debug.keystore"
             fi
         fi
-    - name: Build
-      run: make
+    - name: Build debug APK
+      uses: gradle/gradle-build-action@v2
+      env:
+        DEBUG_KEYSTORE: "debug.keystore"
+        DEBUG_KEYSTORE_PASSWORD: debug0
+        DEBUG_KEY_ALIAS: debug
+        DEBUG_KEY_PASSWORD: debug0
+      with:
+        arguments: assembleDebug
     - name: Artifact naming
       run: |
         artifact="${{github.repository_owner}} ${{github.ref_name}}"
         artifact="${artifact//\//-}" # replace slashes
         echo "artifact=${artifact}" >> $GITHUB_ENV
-    - name: Save debug apk
+    - name: Upload debug APK
       uses: actions/upload-artifact@v3
       with:
         name: "${{env.artifact}} debug_apk"
-        path: _build/*.apk
+        path: build/outputs/apk/debug/*.apk
diff --git a/.gitignore b/.gitignore
index 8a08a4a..397d793 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,12 @@
 *.keystore
 *.keystore.asc
-_build
 /*-keystore.conf
+*.iml
+.gradle
+/local.properties
+/.idea
+.DS_Store
+/captures
+/build
+# Directory _build is not used anymore
+/_build
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index a9bb792..ed0b60f 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="juloo.keyboard2" android:versionCode="36" android:versionName="1.24.0" android:hardwareAccelerated="false">
-  <uses-sdk android:minSdkVersion="4" android:targetSdkVersion="33"/>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="36" android:versionName="1.24.0" android:hardwareAccelerated="false">
   <application android:label="@string/app_name" android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:hardwareAccelerated="false">
     <service android:name="juloo.keyboard2.Keyboard2" android:label="@string/app_name" android:permission="android.permission.BIND_INPUT_METHOD" android:exported="true" android:directBootAware="true">
       <intent-filter>
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 487e268..9af5fa1 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -4,52 +4,44 @@ Thanks for contributing :)
 
 ## Building the app
 
-The application doesn't use Gradle and it might be hard to use some features of
-Android Studio.
-
-Fortunately, there's not many dependencies:
-- OpenJDK 8
+The application uses Gradle and can be used with Android Studio, but using
+Android Studio is not required. The build dependencies are:
+- OpenJDK 17
 - Android SDK: build tools (minimum `28.0.1`), platform `30`
-- Make sure to have the `$ANDROID_HOME` environment variable set.
 
-For Nix users, the right environment can be obtained with `nix-shell ./shell.nix`.
-Instructions to install Nix are [here](https://nixos.wiki/wiki/Nix_Installation_Guide).
+Python 3 is required to update generated files but not to build the app.
 
-Building the debug apk:
+For Android Studio users, no more setup is needed.
 
-```sh
-make
-```
-
-If the build succeed, the debug apk is located in `_build/juloo.keyboard2.debug.apk`.
-
-## Using the local debug.keystore on the Github CI actions
+For Nix users, the right environment can be obtained with `nix-shell ./shell.nix`.
+Instructions to install Nix are [here](https://nixos.wiki/wiki/Nix_Installation_Guide).
 
-It's possible to save the local debug.keystore into a github secret, so the same keystore is utilized to build the debug apk in the CI github actions.
-Doing this, they wil have the same signature, thus the debug apk can be updated without having to uninstall it first.
+If you don't use Android Studio or Nix, you have to inform Gradle about the
+location of your Android SDK by either:
+- Setting the `ANDROID_HOME` environment variable to point to the android sdk or
+- Creating the file `local.properties` and writing
+  `sdk.dir=<location_of_android_home>` into it.
 
-After you sucessfully run `make`, (thus a debug.keystore exists) you can use this second command to generate a base64 stringified version of it
+Building the debug apk:
 
 ```sh
-cd _build
-gpg -c --armor --pinentry-mode loopback --passphrase debug0 --yes "debug.keystore"
+./gradlew assembleDebug
 ```
 
-A file will be generated inside the local `_build/` folder, called `debug.keystore.asc`
-
-You can copy the content of this file, and with that, paste it into a new github secret in your repo settings.
-
-The secret must be named `DEBUG_KEYSTORE`
+If the build succeeds, the debug apk is located in `build/outputs/apk/debug/app-debug.apk`.
 
 ## Debugging on your phone
 
 First [Enable adb debugging on your device](https://developer.android.com/studio/command-line/adb#Enabling).
-Then connect your phone to your computer using an USB cable or wireless
+Then connect your phone to your computer using an USB cable or via wireless
 debugging.
 
+If you use Android Studio, this process will be automatic and you don't have to
+follow this guide anymore.
+
 And finally, install the application with:
 ```sh
-make installd
+./gradlew installDebug
 ```
 
 The released version of the application won't be removed, both versions will
@@ -57,11 +49,13 @@ be installed at the same time.
 
 ## Debugging the application: INSTALL_FAILED_UPDATE_INCOMPATIBLE
 
-`make installd` can fail with the following error message:
+`./gradlew installDebug` can fail with the following error message:
 
 ```
-adb: failed to install _build/juloo.keyboard2.debug.apk: Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package juloo.keyboard2.debug signatures do not match previously installed version; ignoring!]
-make: *** [Makefile:20: installd] Error 1
+FAILURE: Build failed with an exception.
+* What went wrong:
+Execution failed for task ':installDebug'.
+> java.util.concurrent.ExecutionException: com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException: INSTALL_FAILED_UPDATE_INCOMPATIBLE: Existing package juloo.keyboard2.debug signatures do not match newer version; ignoring!
 ```
 
 The application can't be "updated" because the temporary certificate has been
@@ -70,9 +64,24 @@ The application must be enabled again in the settings.
 
 ```sh
 adb uninstall juloo.keyboard2.debug
-make installd
+./gradlew installDebug
 ```
 
+## Specifying a debug signing certificate on Github Actions
+
+It's possible to specify the signing certificate that the automated build
+should use.
+After you successfully run `./gradlew asssembleDebug`, (thus a debug.keystore
+exists) you can use this second command to generate a base64 stringified
+version of it:
+
+```sh
+gpg -c --armor --pinentry-mode loopback --passphrase debug0 --yes "debug.keystore"
+```
+
+This will create the file `debug.keystore.asc`, paste its content into a new
+Github secret named `DEBUG_KEYSTORE`.
+
 ## Guidelines
 
 ### Adding a layout
@@ -89,17 +98,18 @@ The layout file must be placed in the `res/xml/` directory and named according t
 - layout name (eg. the name of a standard)
 - country code (or language code if more adequate)
 
-Then, run `make gen_layouts` to add the layout to the app.
+Then, run `./gradlew genLayoutsList` to add the layout to the app.
 
 The last step will update the file `res/values/layouts.xml`, that you should
 not edit directly.
 
-Run `make check_layouts` to check some properties about your layout. This will
-change the file `check_layout.output`, which you should commit.
+Run `./gradlew checkKeyboardLayouts` to check some properties about your
+layout. This will change the file `check_layout.output`, which you should
+commit.
 
 #### Adding a programming layout
 
-A programming layout must contains every ASCII characters.
+A programming layout must contain all ASCII characters.
 The current programming layouts are: QWERTY, Dvorak and Colemak.
 
 See for example, Dvorak, added in https://github.com/Julow/Unexpected-Keyboard/pull/16
@@ -161,7 +171,7 @@ default translation in `res/values/strings.xml`, which contain the structure of
 the file and the English strings.
 
 To check that `strings.xml` is formatted correctly, run
-`python sync_translations.py`. This will modify your files.
+`./gradlew syncTranslations`. This will modify your files.
 
 The store description is found in `metadata/android/<locale>/`,
 `short_description.txt` and `full_description.txt`.
diff --git a/Makefile b/Makefile
deleted file mode 100644
index b86019a..0000000
--- a/Makefile
+++ /dev/null
@@ -1,139 +0,0 @@
-# Configuration
-
-PACKAGE_NAME = juloo.keyboard2
-
-ANDROID_PLATFORM_VERSION = android-30
-JAVA_VERSION = 1.7
-
-SRC_DIR = srcs
-RES_DIR = res
-
-EXTRA_JARS =
-
-# /
-
-debug: _build/$(PACKAGE_NAME).debug.apk
-release: _build/$(PACKAGE_NAME).apk
-
-installd: _build/$(PACKAGE_NAME).debug.apk
-	adb install -r "$<"
-
-clean:
-	rm -rf _build/*.dex _build/class _build/gen _build/*.apk _build/*.unsigned-apk \
-		_build/*.idsig _build/assets
-
-rebuild_special_font: _build/special_font.ttf
-	cp "$<" srcs/special_font/result.ttf
-
-sync_translations:
-	python sync_translations.py
-
-check_layouts:
-	python check_layout.py $(wildcard res/xml/*.xml) > check_layout.output
-
-gen_layouts:
-	python gen_layouts.py
-
-# Will modify the source tree.
-runtest: rebuild_special_font sync_translations check_layouts gen_layouts
-
-.PHONY: release debug installd clean rebuild_special_font check_layouts \
-	sync_translations runtest gen_layouts
-
-$(shell mkdir -p _build)
-
-ifndef ANDROID_HOME
-$(error ANDROID_HOME not set)
-endif
-
-ANDROID_BUILD_TOOLS = $(lastword $(sort $(wildcard $(ANDROID_HOME)/build-tools/*)))
-ANDROID_PLATFORM = $(ANDROID_HOME)/platforms/$(ANDROID_PLATFORM_VERSION)
-
-ifeq ($(shell [ -d "$(ANDROID_PLATFORM)" ] && echo ok),)
-$(error Android platform not found. Want $(ANDROID_PLATFORM_VERSION), \
-	found $(notdir $(wildcard $(ANDROID_HOME)/platforms/*)))
-endif
-
-JAVAC_FLAGS = -source $(JAVA_VERSION) -target $(JAVA_VERSION) -encoding utf8
-
-# Source files
-
-MANIFEST_FILE = AndroidManifest.xml
-JAVA_FILES = $(shell find $(SRC_DIR) -name '*.java')
-RES_FILES = $(shell find $(RES_DIR) -type f)
-
-# Debug signing
-
-DEBUG_KEYSTORE = _build/debug.keystore
-DEBUG_PASSWD = debug0
-
-$(DEBUG_KEYSTORE):
-	echo y | keytool -genkeypair -dname "cn=d, ou=e, o=b, c=ug" \
-		-alias debug -keypass $(DEBUG_PASSWD) -keystore "$@" \
-		-keyalg rsa -storepass $(DEBUG_PASSWD) -validity 10000
-
-_build/%.debug.apk: _build/%.debug.unsigned-apk $(DEBUG_KEYSTORE)
-	$(ANDROID_BUILD_TOOLS)/apksigner sign --in "$<" --out "$@" \
-		--ks $(DEBUG_KEYSTORE) --ks-key-alias debug --ks-pass "pass:$(DEBUG_PASSWD)"
-
-# Debug apk
-
-_build/$(PACKAGE_NAME).debug.unsigned-apk: AAPT_PACKAGE_FLAGS+=--rename-manifest-package $(PACKAGE_NAME).debug --product debug
-
-# Release signing
-
-# %-keystore.conf should declare KEYSTORE, KEYNAME and KEYSTOREPASS
-#  it is interpreted as a shell script
-_build/%.apk: _build/%.unsigned-apk %-keystore.conf
-	eval `cat $(word 2,$^)` && \
-	$(ANDROID_BUILD_TOOLS)/apksigner sign --in "$<" --out "$@" \
-		--ks "$$KEYSTORE" --ks-key-alias "$$KEYNAME" --ks-pass "pass:$$KEYSTOREPASS"
-
-# Package
-
-_build/%.unsigned-apk: _build/%.unaligned-apk
-	$(ANDROID_BUILD_TOOLS)/zipalign -fp 4 "$<" "$@"
-
-APK_EXTRA_FILES = classes.dex assets/special_font.ttf
-
-_build/%.unaligned-apk: $(addprefix _build/,$(APK_EXTRA_FILES)) $(MANIFEST_FILE)
-	$(ANDROID_BUILD_TOOLS)/aapt package -f -M $(MANIFEST_FILE) -S $(RES_DIR) \
-		-I $(ANDROID_PLATFORM)/android.jar -F "$@" $(AAPT_PACKAGE_FLAGS)
-	cd $(@D) && $(ANDROID_BUILD_TOOLS)/aapt add $(@F) $(APK_EXTRA_FILES)
-
-# Copy the special font file into _build because aapt requires relative paths
-_build/assets/special_font.ttf: srcs/special_font/result.ttf
-	mkdir -p $(@D)
-	cp "$<" "$@"
-
-# R.java
-
-GEN_DIR = _build/gen
-R_FILE = $(GEN_DIR)/$(subst .,/,$(PACKAGE_NAME))/R.java
-
-$(R_FILE): $(RES_FILES) $(MANIFEST_FILE)
-	mkdir -p "$(@D)"
-	$(ANDROID_BUILD_TOOLS)/aapt package -f -m -S $(RES_DIR) -J $(GEN_DIR) \
-		-M $(MANIFEST_FILE) -I $(ANDROID_PLATFORM)/android.jar
-
-# Compile java classes and build classes.dex
-
-OBJ_DIR = _build/class
-# A$B.class files are ignored
-# CLASS_FILES = $(JAVA_FILES:$(SRC_DIR)/%.java=$(OBJ_DIR)/%.class) \
-# 	$(R_FILE:$(GEN_DIR)/%.java=$(OBJ_DIR)/%.class)
-
-_build/classes.dex: $(JAVA_FILES) $(R_FILE)
-	mkdir -p $(OBJ_DIR)
-	javac -d $(OBJ_DIR) $(JAVAC_FLAGS) \
-		-classpath $(ANDROID_PLATFORM)/android.jar:$(EXTRA_JARS) \
-		-sourcepath $(SRC_DIR):$(GEN_DIR) \
-		$^
-	$(ANDROID_BUILD_TOOLS)/d8 --output $(@D) $(OBJ_DIR)/*/*/* $(subst :, ,$(EXTRA_JARS))
-
-# Font file
-
-FONT_GLYPHS = $(wildcard srcs/special_font/*.svg)
-
-_build/special_font.ttf: srcs/special_font/build.pe $(FONT_GLYPHS)
-	fontforge -lang=ff -script $< "$@" $(FONT_GLYPHS)
diff --git a/srcs/special_font/result.ttf b/assets/special_font.ttf
index 5217d4b..5217d4b 100644
--- a/srcs/special_font/result.ttf
+++ b/assets/special_font.ttf
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..57beb80
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,147 @@
+plugins {
+  id 'com.android.application' version '8.1.1'
+}
+
+android {
+  namespace 'juloo.keyboard2'
+  compileSdk 33
+
+  defaultConfig {
+    applicationId "juloo.keyboard2"
+    minSdk 4
+    targetSdkVersion 33
+    versionCode 36
+    versionName "1.24.0"
+  }
+
+  sourceSets {
+    main {
+      manifest.srcFile 'AndroidManifest.xml'
+      java.srcDirs = ['srcs']
+      res.srcDirs = ['res']
+      assets.srcDirs = ['assets']
+    }
+  }
+
+  signingConfigs {
+    // Debug builds will always be signed. If no environment variables are set, a default
+    // keystore will be initialized by the task initDebugKeystore and used. This keystore
+    // can be uploaded to GitHub secrets by following instructions in CONTRIBUTING.md
+    // in order to always receive correctly signed debug APKs from the CI.
+    debug {
+      storeFile(System.env.DEBUG_KEYSTORE ? file(System.env.DEBUG_KEYSTORE) : file("debug.keystore"))
+      storePassword(System.env.DEBUG_KEYSTORE_PASSWORD ? "$System.env.DEBUG_KEYSTORE_PASSWORD" : "debug0")
+      keyAlias(System.env.DEBUG_KEY_ALIAS ? "$System.env.DEBUG_KEY_ALIAS" : "debug")
+      keyPassword(System.env.DEBUG_KEY_PASSWORD ? "$System.env.DEBUG_KEY_PASSWORD" : "debug0")
+    }
+    // Release builds will only be signed with a dedicated key if specified. This key has to be
+    // created manually.
+    release {
+      if (System.env.RELEASE_KEYSTORE) {
+        storeFile file(System.env.RELEASE_KEYSTORE)
+        storePassword "$System.env.RELEASE_KEYSTORE_PASSWORD"
+        keyAlias "$System.env.RELEASE_KEY_ALIAS"
+        keyPassword "$System.env.RELEASE_KEY_PASSWORD"
+      }
+    }
+  }
+
+  buildTypes {
+    release {
+      minifyEnabled true
+      shrinkResources true
+      debuggable false
+      proguardFiles getDefaultProguardFile('proguard-android-optimize.txt')
+      resValue "string", "app_name", "@string/app_name_release"
+      if (System.env.RELEASE_KEYSTORE) {
+        signingConfig signingConfigs.release
+      }
+    }
+    debug {
+      minifyEnabled false
+      shrinkResources false
+      debuggable true
+      applicationIdSuffix ".debug"
+      resValue "string", "app_name", "@string/app_name_debug"
+      resValue "bool", "debug_logs", "true"
+      signingConfig signingConfigs.debug
+    }
+  }
+
+  compileOptions {
+    sourceCompatibility JavaVersion.VERSION_1_7
+    targetCompatibility JavaVersion.VERSION_1_7
+  }
+}
+
+dependencies {
+
+}
+
+tasks.register('buildKeyboardFont') {
+  println "\nBuilding assets/special_font.ttf"
+  mkdir "$buildDir"
+  exec {
+    workingDir "$projectDir/srcs/special_font"
+    def svgFiles = workingDir.listFiles().findAll {
+      it.isFile() && it.name.endsWith(".svg")
+    }
+    commandLine("fontforge", "-lang=ff", "-script", "build.pe", "$buildDir/special_font.ttf", *svgFiles)
+  }
+  copy {
+    from "$buildDir/special_font.ttf"
+    into "assets"
+  }
+}
+
+tasks.withType(Test).configureEach {
+  dependsOn 'genLayoutsList'
+  dependsOn 'checkKeyboardLayouts'
+  dependsOn 'syncTranslations'
+}
+
+tasks.register('genLayoutsList') {
+  println "\nGenerating res/values/layouts.xml"
+  exec {
+    workingDir = projectDir
+    commandLine "python", "gen_layouts.py"
+  }
+}
+
+tasks.register('checkKeyboardLayouts') {
+  println "\nChecking layouts"
+  new ByteArrayOutputStream().withStream { bos ->
+    exec {
+      def layouts = new File(projectDir, "res/xml").listFiles().findAll {
+          it.isFile() && it.name.endsWith(".xml")
+      }
+      workingDir = projectDir
+      commandLine("python", "check_layout.py", *layouts)
+      standardOutput = bos
+    }
+
+    new File(projectDir, "check_layout.output").write(bos.toString())
+  }
+}
+
+tasks.register('syncTranslations') {
+  println "\nUpdating translations"
+  exec {
+    workingDir = projectDir
+    commandLine "python", "sync_translations.py"
+  }
+}
+
+tasks.named("preBuild") {
+  dependsOn += "initDebugKeystore"
+}
+
+tasks.register('initDebugKeystore') {
+  if (!file("debug.keystore").exists()) {
+    println "Initializing default debug keystore"
+    exec {
+      // A shell script might be needed if this line requires input from the user
+      commandLine "keytool", "-genkeypair", "-dname", "cn=d, ou=e, o=b, c=ug", "-alias", "debug", "-keypass", "debug0", "-keystore", "debug.keystore", "-keyalg", "rsa", "-storepass", "debug0", "-validity", "10000"
+    }
+  }
+}
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..72138dd
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Dfile.encoding=UTF-8
+android.useAndroidX=false
+android.nonTransitiveRClass=true
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..e708b1c
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.jar
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..b32fb16
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Mon Aug 21 18:13:41 CEST 2023
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..4f906e0
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/res/values-cs/strings.xml b/res/values-cs/strings.xml
index 85cb835..13be4fb 100644
--- a/res/values-cs/strings.xml
+++ b/res/values-cs/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Klávesnice Unexpected (pro ladění)</string>
-  <string name="app_name" product="default">Klávesnice Unexpected</string>
+  <string name="app_name_release">Klávesnice Unexpected</string>
+  <string name="app_name_debug">Klávesnice Unexpected (pro ladění)</string>
   <string name="settings_activity_label">Nastavení Klávesnice Unexpected</string>
   <string name="pref_portrait">V režimu na výšku</string>
   <string name="pref_landscape">V režimu na šířku</string>
diff --git a/res/values-de/strings.xml b/res/values-de/strings.xml
index f7bf7ba..03042e8 100644
--- a/res/values-de/strings.xml
+++ b/res/values-de/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (Debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (Debug)</string>
   <string name="settings_activity_label">Unexpected Keyboard - Einstellungen</string>
   <string name="pref_portrait">Im Hochformatmodus</string>
   <string name="pref_landscape">Im Querformatmodus</string>
diff --git a/res/values-es/strings.xml b/res/values-es/strings.xml
index b403bdc..3e91392 100644
--- a/res/values-es/strings.xml
+++ b/res/values-es/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (debug)</string>
   <string name="settings_activity_label">Ajustes de Unexpected Keyboard</string>
   <string name="pref_portrait">En modo vertical</string>
   <string name="pref_landscape">En modo horizontal</string>
diff --git a/res/values-fa/strings.xml b/res/values-fa/strings.xml
index de80960..b4a8bcc 100644
--- a/res/values-fa/strings.xml
+++ b/res/values-fa/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">صفحه کلید غیرمنتظره</string>
-  <string name="app_name" product="default">صفحه کلید غیرمنتظره</string>
+  <string name="app_name_release">صفحه کلید غیرمنتظره</string>
+  <string name="app_name_debug">صفحه کلید غیرمنتظره</string>
   <string name="settings_activity_label">تنظیمات صفحه کلید غیرمنتظره</string>
   <string name="pref_portrait">در حالت عمودی</string>
   <string name="pref_landscape">در حالت افقی</string>
diff --git a/res/values-fr/strings.xml b/res/values-fr/strings.xml
index d965996..dc99e83 100644
--- a/res/values-fr/strings.xml
+++ b/res/values-fr/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (debug)</string>
   <string name="settings_activity_label">Unexpected Keyboard Paramètres</string>
   <string name="pref_portrait">En mode portrait</string>
   <string name="pref_landscape">En mode landscape</string>
diff --git a/res/values-it/strings.xml b/res/values-it/strings.xml
index e5cb669..d66e1ce 100644
--- a/res/values-it/strings.xml
+++ b/res/values-it/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (debug)</string>
   <string name="settings_activity_label">Impostazioni di Unexpected Keyboard</string>
   <!-- <string name="pref_portrait">In portrait mode</string> -->
   <!-- <string name="pref_landscape">In landscape mode</string> -->
diff --git a/res/values-ko/strings.xml b/res/values-ko/strings.xml
index 08bbeeb..8f08436 100644
--- a/res/values-ko/strings.xml
+++ b/res/values-ko/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <!-- <string name="app_name" product="debug">Unexpected Keyboard (debug)</string> -->
-  <!-- <string name="app_name" product="default">Unexpected Keyboard</string> -->
+  <!-- <string name="app_name_release">Unexpected Keyboard</string> -->
+  <!-- <string name="app_name_debug">Unexpected Keyboard (Debug)</string> -->
   <string name="settings_activity_label">Unexpected Keyboard 설정</string>
   <!-- <string name="pref_portrait">In portrait mode</string> -->
   <!-- <string name="pref_landscape">In landscape mode</string> -->
diff --git a/res/values-lv/strings.xml b/res/values-lv/strings.xml
index bf43e00..c1c53aa 100644
--- a/res/values-lv/strings.xml
+++ b/res/values-lv/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (atkļūdošana)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (atkļūdošana)</string>
   <string name="settings_activity_label">Unexpected Keyboard iestatījumi</string>
   <string name="pref_portrait">Stateniski</string>
   <string name="pref_landscape">Guleniski</string>
diff --git a/res/values-pl/strings.xml b/res/values-pl/strings.xml
index 0699850..0a6f380 100644
--- a/res/values-pl/strings.xml
+++ b/res/values-pl/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (debug)</string>
   <string name="settings_activity_label">Ustawienia Unexpected Keyboard</string>
   <string name="pref_portrait">W widoku pionowym</string>
   <string name="pref_landscape">W widoku poziomym</string>
diff --git a/res/values-pt/strings.xml b/res/values-pt/strings.xml
index 45ce72d..5e4e93e 100644
--- a/res/values-pt/strings.xml
+++ b/res/values-pt/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Teclado Unexpected</string>
-  <string name="app_name" product="default">Teclado Unexpected</string>
+  <string name="app_name_release">Teclado Unexpected</string>
+  <string name="app_name_debug">Teclado Unexpected</string>
   <string name="settings_activity_label">Configurações</string>
   <string name="pref_portrait">No modo retrato</string>
   <string name="pref_landscape">No modo paisagem</string>
diff --git a/res/values-ro/strings.xml b/res/values-ro/strings.xml
index b205dca..d52db9b 100644
--- a/res/values-ro/strings.xml
+++ b/res/values-ro/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Tastatură Unexpected (depanare)</string>
-  <string name="app_name" product="default">Tastatură Unexpected</string>
+  <string name="app_name_release">Tastatură Unexpected</string>
+  <string name="app_name_debug">Tastatură Unexpected (depanare)</string>
   <string name="settings_activity_label">Setări Tastatură Unexpected</string>
   <string name="pref_portrait">În mod portret</string>
   <string name="pref_landscape">În mod panoramă</string>
diff --git a/res/values-ru/strings.xml b/res/values-ru/strings.xml
index 46e7d42..1ac480a 100644
--- a/res/values-ru/strings.xml
+++ b/res/values-ru/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (отладка)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (отладка)</string>
   <string name="settings_activity_label">Unexpected Keyboard Настройки</string>
   <string name="pref_portrait">В портретном режиме</string>
   <string name="pref_landscape">В ландшафтном режиме</string>
diff --git a/res/values-tr/strings.xml b/res/values-tr/strings.xml
index 292b64e..71a6565 100644
--- a/res/values-tr/strings.xml
+++ b/res/values-tr/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (debug)</string>
   <string name="settings_activity_label">Unexpected Keyboard Ayarları</string>
   <string name="pref_portrait">Portre modunda</string>
   <string name="pref_landscape">Manzara modunda</string>
diff --git a/res/values-vi/strings.xml b/res/values-vi/strings.xml
index 08e7353..a0a0e81 100644
--- a/res/values-vi/strings.xml
+++ b/res/values-vi/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (gỡ lỗi)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (gỡ lỗi)</string>
   <string name="settings_activity_label">Cài đặt Unexpected Keyboard</string>
   <string name="pref_portrait">Trong chế độ chân dung</string>
   <string name="pref_landscape">Trong chế độ phong cảnh</string>
diff --git a/res/values-zh-rCN/strings.xml b/res/values-zh-rCN/strings.xml
index a63133e..642e71a 100644
--- a/res/values-zh-rCN/strings.xml
+++ b/res/values-zh-rCN/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (debug)</string>
   <string name="settings_activity_label">Unexpected Keyboard 设置</string>
   <string name="pref_portrait">在竖屏模式下</string>
   <string name="pref_landscape">在横屏模式下</string>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 7a80d76..b84f683 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-  <string name="app_name" product="debug">Unexpected Keyboard (debug)</string>
-  <string name="app_name" product="default">Unexpected Keyboard</string>
+  <string name="app_name_release">Unexpected Keyboard</string>
+  <string name="app_name_debug">Unexpected Keyboard (Debug)</string>
   <string name="settings_activity_label">Unexpected Keyboard Settings</string>
   <string name="pref_portrait">In portrait mode</string>
   <string name="pref_landscape">In landscape mode</string>
diff --git a/res/values/values.xml b/res/values/values.xml
index 737e7db..8e40307 100644
--- a/res/values/values.xml
+++ b/res/values/values.xml
@@ -6,6 +6,5 @@
   <dimen name="emoji_grid_height">250dp</dimen>
   <dimen name="emoji_text_size">28dp</dimen>
   <dimen name="pref_button_size">28dp</dimen>
-  <bool name="debug_logs" product="debug">true</bool>
-  <bool name="debug_logs" product="default">false</bool>
+  <bool name="debug_logs">false</bool> <!-- Will be overwritten automatically by Gradle for the debug build variant -->
 </resources>
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..649cd46
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,17 @@
+pluginManagement {
+  repositories {
+    google()
+    mavenCentral()
+    gradlePluginPortal()
+  }
+}
+
+dependencyResolutionManagement {
+  repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+  repositories {
+    google()
+    mavenCentral()
+  }
+}
+
+rootProject.name = "Unexpected-Keyboard"
diff --git a/srcs/juloo.keyboard2/Theme.java b/srcs/juloo.keyboard2/Theme.java
index b5e5b88..8539edb 100644
--- a/srcs/juloo.keyboard2/Theme.java
+++ b/srcs/juloo.keyboard2/Theme.java
@@ -1,7 +1,6 @@
 package juloo.keyboard2;
 
 import android.content.Context;
-import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.Color;
 import android.graphics.Paint;