android: replace build system with gradle

.gitignore

@@ -1,3 +1,3 @@
 /local.properties
-/bin/
-/gen/
+/build
+/.gradle

AndroidManifest.xml

@@ -6,7 +6,7 @@
     android:versionName="@string/app_versionName">
 
   <uses-sdk
-      android:minSdkVersion="17"
+      android:minSdkVersion="14"
       android:targetSdkVersion="19" />
 
   <uses-permission android:name="android.permission.INTERNET" />

ant.properties

@@ -1 +0,0 @@
-java.compilerargs=-Xlint:deprecation

build.gradle

@@ -0,0 +1,52 @@
+import java.util.regex.Pattern
+
+apply plugin: 'android'
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:0.14.+'
+    }
+}
+
+repositories {
+    maven {
+        url 'https://download.01.org/crosswalk/releases/crosswalk/android/maven2'
+    }
+}
+
+dependencies {
+    compile 'org.xwalk:xwalk_core_library:10.39.235.15'
+}
+
+android {
+    sourceSets {
+        main {
+            manifest.srcFile 'AndroidManifest.xml'
+            java.srcDirs = ['src']
+            resources.srcDirs = ['src']
+            aidl.srcDirs = ['src']
+            renderscript.srcDirs = ['src']
+            res.srcDirs = ['res']
+            assets.srcDirs = ['assets']
+        }
+    }
+
+    defaultConfig {
+        versionCode getVersionCodeFromManifest()
+    }
+
+    compileSdkVersion 21
+    buildToolsVersion "21.1.2"
+}
+
+def getVersionCodeFromManifest() {
+    def manifestFile = file(android.sourceSets.main.manifest.srcFile)
+    def pattern = Pattern.compile("versionCode=\"(\\d+)\"")
+    def matcher = pattern.matcher(manifestFile.getText())
+    matcher.find()
+    return Integer.parseInt(matcher.group(1))
+}

build.xml

@@ -1,25 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project name="DashKiosk" default="help">
-
-    <property file="local.properties" />
-    <property file="ant.properties" />
-
-    <property environment="env" />
-    <condition property="sdk.dir" value="${env.ANDROID_HOME}">
-        <isset property="env.ANDROID_HOME" />
-    </condition>
-
-    <loadproperties srcFile="project.properties" />
-
-    <!-- quick check on sdk.dir -->
-    <fail
-            message="sdk.dir is missing. Make sure to generate local.properties using 'android update project' or to inject it through the ANDROID_HOME environment variable."
-            unless="sdk.dir"
-    />
-
-    <import file="custom_rules.xml" optional="true" />
-
-    <!-- version-tag: custom -->
-    <import file="${sdk.dir}/tools/ant/build.xml" />
-
-</project>

project.properties

@@ -1,15 +0,0 @@
-# This file is automatically generated by Android Tools.
-# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
-#
-# This file must be checked in Version Control Systems.
-#
-# To customize properties used by the Ant build system edit
-# "ant.properties", and override values to adapt the script to your
-# project structure.
-#
-# To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user.home):
-#proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
-
-# Project target.
-target=android-19
-android.library.reference.1=../../../../src/crosswalk-webview-7.35.136.0-arm/