Added the cmake build files.

Author: Mitchell Dowd

android/AndroidManifest.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- BEGIN_INCLUDE(manifest) -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="jnipp"
+          android:versionCode="1"
+          android:versionName="1.0">
+</manifest>
+<!-- END_INCLUDE(manifest) -->

android/CMakeLists.txt

@@ -0,0 +1,7 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 3.4.1)
+
+PROJECT(native_app)
+
+FILE(GLOB sources ../*.cpp ../common/*.cpp ../android/*.cpp)
+
+ADD_LIBRARY(native_app ${sources})

build.gradle

@@ -1,39 +1,30 @@
-apply plugin: 'com.android.model.native'
+apply plugin: 'com.android.library'
 
-model {
-    android {
-        compileSdkVersion = 24
-        buildToolsVersion = '25.0.3'
+android {
+    compileSdkVersion 26
+    buildToolsVersion '28.0.3'
 
-        defaultConfig {
-            minSdkVersion.apiLevel    = 15
-            targetSdkVersion.apiLevel = 24
-        }
+    defaultConfig {
+        minSdkVersion 15
+        targetSdkVersion 26
+    }
 
-        ndk {
-            platformVersion = 15
-            moduleName      = 'jnipp'
-            toolchain       = 'clang'
-            stl             = 'c++_static'
-            cppFlags.addAll(['-std=c++11', '-fexceptions', '-I' + file('.').absolutePath])
-            ldLibs.addAll(['log', 'android', 'EGL', 'GLESv1_CM'])
+    buildTypes {
+        release {
+            minifyEnabled = false
+            proguardFiles getDefaultProguardFile('proguard-android.txt')
         }
+    }
 
-        buildTypes {
-            release {
-                minifyEnabled = false
-                proguardFiles.add(file('proguard-rules.txt'))
-            }
+    sourceSets {
+        main {
+            manifest.srcFile 'android/AndroidManifest.xml'
         }
+    }
 
-        sources {
-             main {
-                 jni {
-                     source {
-                         srcDir '.'
-                     }
-                 }
-            }
+    externalNativeBuild {
+        cmake {
+            path 'android/CMakeLists.txt'
         }
     }
 }