Add a build.gradle file to the extension template.

templates/extension/dependencies/android/build.gradle

@@ -0,0 +1,13 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion ::ANDROID_TARGET_SDK_VERSION::
+
+    defaultConfig {
+        applicationId "org.haxe.extension.::extensionLowerCase::"
+        minSdkVersion ::ANDROID_MINIMUM_SDK_VERSION::
+        targetSdkVersion ::ANDROID_TARGET_SDK_VERSION::
+        versionCode ::META_BUILD_NUMBER::
+        versionName "::META_VERSION::"
+    }
+}

templates/extension/dependencies/android/build.xml

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project name="::className::" default="help">
-	
-	<property environment="env"/>
-	<property name="sdk.dir" value="${env.ANDROID_SDK}"/>
-	
-	<property file="local.properties"/>
-	<property file="ant.properties"/>
-	<property file="project.properties"/>
-	
-	<import file="${sdk.dir}/tools/ant/build.xml"/>
-	
-</project>

templates/extension/dependencies/android/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 use,
-# "build.properties", and override values to adapt the script to your
-# project structure.
-
-android.library=true
-
-android.library.reference.1=../extension-api
-
-# Project target.
-target=android-::ANDROID_TARGET_SDK_VERSION::