Android / Gradle updates (current working build): upgraded API 26 to 28, build tools to 28.0.3, Gradle 4.10.2, see readium/readium-sdk#317 and readium/readium-lcp-client#49

Author: danielweck

Diff for: SDKLauncher-Android/app/build_experimental.gradle

@@ -35,8 +35,8 @@ model {
     }
 
     android {
-        compileSdkVersion = 26
-        buildToolsVersion = "27.0.3"
+        compileSdkVersion = 28
+        buildToolsVersion = "28.0.3"
 
         defaultConfig {
 
@@ -47,7 +47,7 @@ model {
             minSdkVersion.apiLevel = 19
 
             // manifest/uses-sdk@android:targetSdkVersion attribute in src/main/AndroidManifest.xml
-            targetSdkVersion.apiLevel = 26
+            targetSdkVersion.apiLevel = 28
 
             // manifest@android:versionCode attribute in src/main/AndroidManifest.xml
             versionCode 31

Diff for: SDKLauncher-Android/app/build_stable.gradle

@@ -11,8 +11,8 @@ def lcpDir = project(':lcp').projectDir
 def epub3Dir = project(':epub3').projectDir
 
 android {
-    compileSdkVersion = 26
-    buildToolsVersion = "27.0.3"
+    compileSdkVersion = 28
+    buildToolsVersion = "28.0.3"
 
     lintOptions {
         checkReleaseBuilds = false
@@ -40,7 +40,7 @@ android {
         minSdkVersion 19
 
         // manifest/uses-sdk@android:targetSdkVersion attribute in src/main/AndroidManifest.xml
-        targetSdkVersion 26
+        targetSdkVersion 28
 
         // manifest@android:versionCode attribute in src/main/AndroidManifest.xml
         versionCode 31

Diff for: SDKLauncher-Android/app/src/main/AndroidManifest.xml

@@ -6,7 +6,7 @@
 
     <uses-sdk
         android:minSdkVersion="19"
-        android:targetSdkVersion="26" />
+        android:targetSdkVersion="28" />
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Diff for: SDKLauncher-Android/gradle/wrapper/gradle-wrapper.properties

@@ -5,5 +5,5 @@ zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
 #https://services.gradle.org/distributions
 # GRADLE EXPERIMENTAL requires 3.3
-# GRADLE STABLE works with latest (4.4)
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+# GRADLE STABLE works with latest (4.10.2)
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip

Diff for: SDKLauncher-Android/project.properties

@@ -11,5 +11,5 @@
 #proguard.config=${sdk.dir}/tools/proguard/proguard-android.txt:proguard-project.txt
 
 # Project target.
-target=android-26
+target=android-28
 android.library.reference.1=../readium-sdk/Platform/Android