[Android] Fix the gradle build system to allow for building from term…

…inal. It will now copy the library files correctly and sign the resulting apk.

Source/Android/build.gradle

@@ -1,42 +1,67 @@
 buildscript {
-    repositories {
-        mavenCentral()
-    }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:0.5.+'
-    }
+	repositories {
+		mavenCentral()
+	}
+	dependencies {
+		classpath 'com.android.tools.build:gradle:0.5.+'
+	}
 }
 apply plugin: 'android'
 
 dependencies {
-    compile fileTree(dir: 'libs', include: '*.jar')
+	compile fileTree(dir: 'libs', include: '*.jar')
+	compile fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar')
 }
 
 android {
-    compileSdkVersion 18
-    buildToolsVersion "18.0.1"
+	compileSdkVersion 19
+	buildToolsVersion "19.0.1"
 
-    sourceSets {
-        main {
-            manifest.srcFile 'AndroidManifest.xml'
-            java.srcDirs = ['src']
-            resources.srcDirs = ['src']
-            aidl.srcDirs = ['src']
-            renderscript.srcDirs = ['src']
-            res.srcDirs = ['res']
-            assets.srcDirs = ['assets']
-        }
+	task nativeLibsToJar(type: Zip, description: 'create a jar archive of the native libs') {
+		destinationDir file("$buildDir/native-libs")
+		baseName 'native-libs'
+		extension 'jar'
+		from fileTree(dir: 'libs', include: '**/*.so')
+		into 'lib/'
+	}
 
-        // Move the tests to tests/java, tests/res, etc...
-        instrumentTest.setRoot('tests')
+	tasks.withType(Compile) {
+		compileTask -> compileTask.dependsOn(nativeLibsToJar)
+	}
+	sourceSets {
+		main {
+			manifest.srcFile 'AndroidManifest.xml'
+			java.srcDirs = ['src']
+			resources.srcDirs = ['src']
+			aidl.srcDirs = ['src']
+			renderscript.srcDirs = ['src']
+			res.srcDirs = ['res']
+			assets.srcDirs = ['assets']
+		}
 
-        // Move the build types to build-types/<type>
-        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
-        // This moves them out of them default location under src/<type>/... which would
-        // conflict with src/ being used by the main source set.
-        // Adding new build types or product flavors should be accompanied
-        // by a similar customization.
-        debug.setRoot('build-types/debug')
-        release.setRoot('build-types/release')
-    }
+		// Move the tests to tests/java, tests/res, etc...
+		instrumentTest.setRoot('tests')
+
+		// Move the build types to build-types/<type>
+		// For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
+		// This moves them out of them default location under src/<type>/... which would
+		// conflict with src/ being used by the main source set.
+		// Adding new build types or product flavors should be accompanied
+		// by a similar customization.
+		debug.setRoot('build-types/debug')
+		release.setRoot('build-types/release')
+	}
+	signingConfigs {
+		release {
+			storeFile file(System.getenv("KEYSTORE"))
+			storePassword System.getenv("KEYSTORE_PASSWORD")
+			keyAlias System.getenv("KEY_ALIAS")
+			keyPassword System.getenv("KEY_PASSWORD")
+		}
+	}
+	buildTypes {
+		release {
+			signingConfig signingConfigs.release
+		}
+	}
 }