Merge pull request #272 from googlesamples/hello-libs-ndk

Adding hello-libs into master-ndk branch for purpose of:

hello-libs/.google/packaging.yaml

@@ -0,0 +1,7 @@
+status:       PUBLISHED
+technologies: [Android, NDK]
+categories:   [NDK]
+languages:    [C++, Java]
+solutions:    [Mobile]
+github:       googlesamples/android-ndk
+license:      apache2

hello-libs/README.md

@@ -0,0 +1,62 @@
+Hello-libs
+=========
+Hello-Libs is an Android sample that demos native lib management in Android Studio.
+
+This sample uses the new [Android Studio external C build plugin](http://tools.android.com/tech-docs/external-c-builds)
+with external lib support with 
+* LOCAL_STATIC_LIBRARIES
+* LOCAL_SHARED_LIBRARIES
+
+it includes 2 modules:
+*    app -- uses one shared lib and one static lib from $project/distribution/
+*    gen-libs -- generates one shared and one static lib, and copy them into $project/distribution
+To generate libs, refer to file gen-libs/gen_lib.sh
+
+
+Pre-requisites
+--------------
+- Android Studio 2.2+ with [NDK](https://developer.android.com/ndk/) bundle.
+
+Getting Started
+---------------
+1. [Download Android Studio](http://developer.android.com/sdk/index.html)
+1. Launch Android Studio.
+1. Open the sample directory.
+1. Open *File/Project Structure...*
+  - Click *Download* or *Select NDK location*.
+1. Click *Tools/Android/Sync Project with Gradle Files*.
+1. Click *Run/Run 'app'*.
+
+Screenshots
+-----------
+![screenshot](screenshot.png)
+
+Support
+-------
+If you've found an error in these samples, please [file an issue](https://github.com/googlesamples/android-ndk/issues/new).
+
+Patches are encouraged, and may be submitted by [forking this project](https://github.com/googlesamples/android-ndk/fork) and
+submitting a pull request through GitHub. Please see [CONTRIBUTING.md](../CONTRIBUTING.md) for more details.
+
+- [Stack Overflow](http://stackoverflow.com/questions/tagged/android-ndk)
+- [Google+ Community](https://plus.google.com/communities/105153134372062985968)
+- [Android Tools Feedbacks](http://tools.android.com/feedback)
+
+License
+-------
+Copyright 2015 Google, Inc.
+
+Licensed to the Apache Software Foundation (ASF) under one or more contributor
+license agreements.  See the NOTICE file distributed with this work for
+additional information regarding copyright ownership.  The ASF licenses this
+file to you 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.

hello-libs/app/build.gradle

@@ -0,0 +1,40 @@
+apply plugin: 'com.android.application'
+
+// Pre-requirement:
+//  generate 2 libs on terminal ( or command line )
+//  please refer to ${project}/gen-libs/gen_lib.sh for details
+
+android {
+    compileSdkVersion = 23
+    buildToolsVersion = '23.0.2'
+
+    defaultConfig {
+        applicationId = 'com.example.hellolibs'
+        minSdkVersion 13
+        targetSdkVersion 23
+        versionCode = 1
+        versionName = '1.0'
+        externalNativeBuild {
+            ndkBuild {
+                abiFilters 'x86', 'x86_64', 'armeabi', 'armeabi-v7a', 'arm64-v8a'
+            }
+        }
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    externalNativeBuild {
+        ndkBuild {
+            path 'src/main/cpp/Android.mk'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(include: ['*.jar'], dir: 'libs')
+    compile 'com.android.support:appcompat-v7:23.4.0'
+    compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha2'
+}

hello-libs/app/proguard-rules.pro

@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in /Users/gfan/dev/sdk_current/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

hello-libs/app/src/main/AndroidManifest.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.hellolibs">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

hello-libs/app/src/main/cpp/Android.mk

@@ -0,0 +1,44 @@
+# Copyright (C) 2010 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.
+#
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+# config distributed lib path
+EXT_LIB_ROOT := $(LOCAL_PATH)/../../../../distribution
+
+# import 2 libs: remember to generate them SEPARATELY in terminal/command line first!
+LOCAL_MODULE := local_gmath
+LOCAL_SRC_FILES := $(EXT_LIB_ROOT)/gmath/lib/$(TARGET_ARCH_ABI)/libgmath.a
+LOCAL_EXPORT_C_INCLUDES := $(EXT_LIB_ROOT)/gmath/include
+include $(PREBUILT_STATIC_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := local_gperf
+LOCAL_SRC_FILES := $(EXT_LIB_ROOT)/gperf/lib/$(TARGET_ARCH_ABI)/libgperf.so
+LOCAL_EXPORT_C_INCLUDES := $(EXT_LIB_ROOT)/gperf/include
+include $(PREBUILT_SHARED_LIBRARY)
+
+# build our app's shared lib
+include $(CLEAR_VARS)
+LOCAL_CFLAGS := -std=gnu++11
+LOCAL_MODULE    := hello-libs
+LOCAL_SRC_FILES := hello-libs.cpp
+LOCAL_LDLIBS    := -llog -landroid
+LOCAL_STATIC_LIBRARIES := local_gmath
+LOCAL_SHARED_LIBRARIES := local_gperf
+
+include $(BUILD_SHARED_LIBRARY)
+

hello-libs/app/src/main/cpp/Application.mk

@@ -0,0 +1,3 @@
+APP_ABI := all
+APP_PLATFORM := android-9
+APP_STL := gnustl_static

hello-libs/app/src/main/cpp/hello-libs.cpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2016 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.
+ *
+ */
+#include <cstring>
+#include <jni.h>
+#include <cinttypes>
+#include <android/log.h>
+#include <gmath.h>
+#include <gperf.h>
+
+
+#define LOGI(...) \
+  ((void)__android_log_print(ANDROID_LOG_INFO, "hell-libs::", __VA_ARGS__))
+
+/* This is a trivial JNI example where we use a native method
+ * to return a new VM String. See the corresponding Java source
+ * file located at:
+ *
+ *   app/src/main/java/com/example/hellolibs/MainActivity.java
+ */
+extern "C" JNIEXPORT jstring JNICALL
+Java_com_example_hellolibs_MainActivity_stringFromJNI(JNIEnv *env, jobject thiz) {
+    // Just for simplicity, we do this right away; correct way would do it in
+    // another thread...
+    auto ticks = GetTicks();
+
+    for (auto exp = 0; exp < 32; ++exp) {
+        volatile unsigned val = gpower(exp);
+        (void) val;  // to silence compiler warning
+    }
+    ticks = GetTicks() - ticks;
+
+    LOGI("calculation time: %" PRIu64, ticks);
+
+    return env->NewStringUTF("Hello from JNI!");
+}

hello-libs/app/src/main/java/com/example/hellolibs/MainActivity.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+package com.example.hellolibs;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.widget.TextView;
+/*
+ * Simple Java UI to trigger jni function. It is exactly same as Java code
+ * in hello-jni.
+ */
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        TextView tv = new TextView(this);
+        tv.setText( stringFromJNI() );
+        setContentView(tv);
+    }
+    public native String  stringFromJNI();
+    static {
+        System.loadLibrary("hello-libs");
+    }
+
+}

hello-libs/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.example.hellolibs.MainActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Hello World!" />
+</RelativeLayout>

hello-libs/app/src/main/res/values-w820dp/dimens.xml

@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

hello-libs/app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

hello-libs/app/src/main/res/values/dimens.xml

@@ -0,0 +1,5 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>

hello-libs/app/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">hello-libs</string>
+</resources>

hello-libs/app/src/main/res/values/styles.xml

@@ -0,0 +1,11 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+</resources>

hello-libs/build.gradle

@@ -0,0 +1,23 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:2.2.0-alpha6'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

hello-libs/gen-libs/gen_lib.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Purpose:  Generate libgmath.a and libgperf.so
+#           Copy them into distribution directories
+#              distribution/gmath
+#              distribution/gperf
+#           works for Mac X. windows batch file is not implemented
+# Execution in Terminal:
+#          source gen_lib.sh  ( or ./gen_lib.sh )
+
+# Build 2 libs in terminal with  ndk-build tool DIRECTLY
+ndk-build APP_BUILD_SCRIPT=./gmath/Android.mk  NDK_PROJECT_PATH=. NDK_APPLICATION_MK=./gmath/Application.mk
+ndk-build APP_BUILD_SCRIPT=./gperf/Android.mk  NDK_PROJECT_PATH=. NDK_APPLICATION_MK=./gperf/Application.mk
+
+# Distribute the libs
+DEST_DIR=../distribution
+declare supported_ABIs=( \
+  armeabi        \
+  armeabi-v7a    \
+  arm64-v8a      \
+  mips           \
+  mips64        \
+  x86            \
+  x86_64         \
+)
+
+for abi in "${supported_ABIs[@]}"; do
+  mkdir -p ${DEST_DIR}/gmath/lib/${abi} ${DEST_DIR}/gperf/lib/${abi}
+  cp -f ./obj/local/${abi}/libgmath.a  ${DEST_DIR}/gmath/lib/${abi}/
+  cp -f ./obj/local/${abi}/libgperf.so ${DEST_DIR}/gperf/lib/${abi}/  
+done
+
+# or we could copy it from lib directly for shared lib
+# cp -fr libs ${DEST_DIR}/gperf/lib
+
+mkdir -p ${DEST_DIR}/gmath/include  ${DEST_DIR}/gperf/include
+cp -f ./gmath/gmath.h  ${DEST_DIR}/gmath/include/
+cp -f ./gperf/gperf.h  ${DEST_DIR}/gperf/include/
+

hello-libs/gen-libs/gmath/Android.mk

@@ -0,0 +1,8 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := gmath
+LOCAL_SRC_FILES := gmath.c
+include $(BUILD_STATIC_LIBRARY)
+
+

hello-libs/gen-libs/gmath/Application.mk

@@ -0,0 +1,3 @@
+APP_ABI := all
+APP_PLATFORM := android-9
+

hello-libs/gen-libs/gmath/gmath.c

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2016 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.
+ *
+ */
+#include <android/log.h>
+#include "gmath.h"
+
+#if defined(__GNUC__) && __GNUC__ >= 4
+#define GMATH_EXPORT __attribute__((visibility("default")))
+#elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)
+#define GMATH_EXPORT __attribute__((visibility("default")))
+#else
+#define GMATH_EXPORT
+#endif
+
+#define LOGE(...) \
+  ((void)__android_log_print(ANDROID_LOG_ERROR, "gmath::", __VA_ARGS__))
+
+/*
+ * return 2 ^ n with multiplication implementation
+ */
+GMATH_EXPORT unsigned gpower(unsigned n) {
+    if (n == 0)
+        return 1;
+    if (n > 31) {
+        LOGE("error from power(%d): integer overflow", n);
+        return 0;
+    }
+    unsigned val = gpower(n>>1) * gpower (n>>1);
+    if (n & 1)
+      val *= 2;
+    return val;
+}
+

hello-libs/gen-libs/gmath/gmath.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2016 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.
+ *
+ */
+#ifndef __POWER_HPP__
+#define __POWER_HPP__
+/*
+ * return pow(2, n)
+ */
+#ifdef __cplusplus
+extern "C"
+#endif // __cplusplus
+           unsigned gpower(unsigned n);
+
+#endif //__POWER_HPP__

hello-libs/gen-libs/gperf/Android.mk

@@ -0,0 +1,8 @@
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := gperf
+LOCAL_SRC_FILES := gperf.c
+include $(BUILD_SHARED_LIBRARY)
+
+

hello-libs/gen-libs/gperf/Application.mk

@@ -0,0 +1,3 @@
+APP_ABI := all
+APP_PLATFORM := android-9
+

hello-libs/gen-libs/gperf/gperf.c

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016 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.
+ *
+ */
+#include <time.h>
+#include "gperf.h"
+
+#if defined(__GNUC__) && __GNUC__ >= 4
+#define GPERF_EXPORT __attribute__((visibility("default")))
+#elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)
+#define GPERF_EXPORT __attribute__((visibility("default")))
+#else
+#define GPERF_EXPORT
+#endif
+
+/*
+ * return current ticks
+ */
+GPERF_EXPORT uint64_t GetTicks(void) {
+    struct timeval Time;
+    uint64_t cur_tick = (uint64_t) 1000000;
+
+    gettimeofday( &Time, NULL );
+    cur_tick *= Time.tv_sec;
+
+    return (cur_tick + Time.tv_usec);
+}
+

hello-libs/gen-libs/gperf/gperf.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2016 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.
+ *
+ */
+#ifndef __GPERF_HPP__
+#define __GPERF_HPP__
+
+#include <sys/types.h>
+
+/*
+ * return current system ticks
+ */
+#ifdef __cplusplus
+extern "C"
+#endif // __cplusplus
+uint64_t GetTicks(void);
+
+#endif //__GPERF_HPP__

hello-libs/gradle.properties

@@ -0,0 +1,18 @@
+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+# Default value: -Xmx10248m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true

hello-libs/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Tue May 31 19:59:23 PDT 2016
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-bin.zip

hello-libs/gradlew

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# 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 "$SAVED" >/dev/null
+
+CLASSPATH=$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" ] ; 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, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$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`="\"$arg\""
+        fi
+        i=$((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
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

hello-libs/gradlew.bat

@@ -0,0 +1,90 @@
+@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
+
+@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=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@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 init
+
+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 init
+
+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
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+: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 %CMD_LINE_ARGS%
+
+: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

hello-libs/settings.gradle

@@ -0,0 +1,5 @@
+include ':app'
+
+
+
+