[#261] Add property for NDK version

demo-app/build.gradle

@@ -5,12 +5,12 @@ apply plugin: 'kotlin-kapt'
 apply plugin: 'androidx.navigation.safeargs'
 
 android {
-    ndkVersion "21.1.6352462"
-    compileSdkVersion 29
+    ndkVersion project.property("ndkVersion")
+    compileSdkVersion Integer.parseInt(project.property("compileSdkVersion"))
     defaultConfig {
         applicationId "cash.z.ecc.android.sdk.demoapp"
-        minSdkVersion 21
-        targetSdkVersion 29
+        minSdkVersion 21 // Different from the SDK min
+        targetSdkVersion Integer.parseInt(project.property("targetSdkVersion"))
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

gradle.properties

@@ -37,4 +37,11 @@ POM_LICENCE_URL=http://opensource.org/licenses/MIT
 POM_LICENCE_DIST=repo
 POM_DEVELOPER_ID=gmale
 POM_DEVELOPER_NAME=Kevin Gorham
-POM_DEVELOPER_URL=https://github.com/gmale/
+POM_DEVELOPER_URL=https://github.com/gmale/
+
+# Versions
+# Note: When updating the NDK version here, be sure to update the version on the CI server as well
+ndkVersion=21.1.6352462
+minSdkVersion=16
+targetSdkVersion=29
+compileSdkVersion=29

sdk-lib/build.gradle

@@ -17,15 +17,15 @@ apply plugin: 'org.mozilla.rust-android-gradle.rust-android'
 apply plugin: 'com.vanniktech.maven.publish'
 
 android {
-    compileSdkVersion config.compileSdkVersion
+    compileSdkVersion Integer.parseInt(project.property("compileSdkVersion"))
 
     useLibrary 'android.test.runner'
 
-    ndkVersion "21.1.6352462"
+    ndkVersion project.property("ndkVersion")
 
     defaultConfig {
-        minSdkVersion config.minSdkVersion
-        targetSdkVersion config.targetSdkVersion
+        minSdkVersion Integer.parseInt(project.property("minSdkVersion"))
+        targetSdkVersion Integer.parseInt(project.property("targetSdkVersion"))
         versionCode = config.publish.versionCode
         versionName = config.publish.versionName
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"

sdk-lib/config.gradle

@@ -2,11 +2,6 @@
 // Publishing
 /////////////////////////////////////////
 
-// general
-compileSdkVersion = 30
-minSdkVersion = 16
-targetSdkVersion = 30
-
 publish {
     group = 'cash.z.ecc.android'
     versionName = '1.3.0-beta18'