Add gradle support

Change-Id: Ieb4ccb72b63ed5763e3c7c828c3b7efe7c106bd0
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b0f1df6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+.gradle
+.idea
+bin
+build
+gen
+local.properties
+*.DS_Store
+*~
+*.swp
+*.swo
+*.iml
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..d8ddba8
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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
+ *
+ *   http://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.
+ */
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath "com.android.tools.build:gradle:0.11.+"
+    }
+}
+
+apply plugin: 'android'
+
+android {
+    compileSdkVersion "android-L"
+    buildToolsVersion "19.1"
+
+    defaultConfig {
+        applicationId "com.google.android.apps.calculator"
+    }
+
+    sourceSets {
+        main {
+            manifest.srcFile "AndroidManifest.xml"
+            java.srcDirs = ["src"]
+            res.srcDirs = ["res"]
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_7
+        targetCompatibility JavaVersion.VERSION_1_7
+    }
+}
+
+repositories {
+    mavenLocal()
+}
+
+dependencies {
+    compile files("arity-2.1.2.jar")
+    compile "com.android.support:support-v4:+"
+}