Add 'asset' URLConnection; IOUtil uses URLConnection / incr. effeciency; Android ClassLoaderUtil cleanup;

- Add 'asset' URLConnection
  - Please read API doc 'PiggybackURLConnection' and 'AssetURLConnection'

  - Solves generic resource handling where platform locations may differ,
    ie ClassLoader lookup on Android in the 'assets/' subfolder.

  - New Android 'AssetDexClassLoader' uses 'assets/' folder for findResource(..)

  - aapt.signed (our APK ant task)
    - uses 'assets/' folder

    - adds the 'assetsdir' attribute allowing to copy other assets into the APK

- IOUtil uses URLConnection / incr. effeciency
  - using URLConnection on all getResource(..) since URL
    is connected anyways for validation and URLConnection can be used by caller right away

  - String getRelativeOf(URL, String) -> URL getRelativeOf(URL, String)
    - preserves scheme, authority, etc
    - simple parentOf handling, more efficient

  - reusing new 'asset' protocol impl.

- Android ClassLoaderUtil cleanup;
  - Use createClassLoader(..) impl for build-in static jogamp and user APKs,
    which removes code redundancy

Tests: New code path, especially 'assets' are covered by new unit tests, no regressions on Linux.

1 files changed, 10 insertions, 4 deletions

diff --git a/make/jogamp-androidtasks.xml b/make/jogamp-androidtasks.xml
index 5e8405b..5c68e0e 100644
--- a/make/jogamp-androidtasks.xml
+++ b/make/jogamp-androidtasks.xml
@@ -32,6 +32,7 @@
       -->
 
     <macrodef name="aapt.signed">
+      <attribute name="assetsdir" default="/non.existing.src.path"/>
       <attribute name="jarsrcdir" default="/non.existing.src.path"/>
       <attribute name="jarbuilddir" />
       <attribute name="jarbasename" />
@@ -73,20 +74,24 @@
         <delete file="${m.aapt.release.file.name}" includeEmptyDirs="true" quiet="true" failonerror="false" />
         <delete dir="${m.aapt.build.apk}" includeEmptyDirs="true" quiet="true" failonerror="false" />
 
+        <mkdir dir="${m.aapt.build.apk}/image/assets" />
         <mkdir dir="${m.aapt.build.apk}/image/lib/@{android.abi}" />
         <mkdir dir="${m.aapt.build.apk}/image/lib/src" />
         <mkdir dir="${m.aapt.build.apk}/image/lib/classes" />
-        <mkdir dir="${m.aapt.build.apk}/image/lib/assets" />
         <copy todir="${m.aapt.build.apk}/image/lib/@{android.abi}">
             <fileset dir="@{nativebuilddir}">
                 <include name="*@{nativebasename}*.${native.library.suffix}" />
             </fileset>
         </copy>
 
-        <copy todir="${m.aapt.build.apk}/image" failonerror="false" includeEmptyDirs="false">
+        <copy todir="${m.aapt.build.apk}/image/assets" failonerror="false" includeEmptyDirs="false">
             <fileset dir="@{jarsrcdir}"
                      includes="**"
-                     excludes="**/*.java **/*.class **/*.h **/*.c **/*.m"/>
+                     excludes="**/*.java **/*.class **/*.h **/*.c **/*.m **/*.sh"/>
+        </copy>
+        <copy todir="${m.aapt.build.apk}/image/assets" failonerror="false" includeEmptyDirs="false">
+            <fileset dir="@{assetsdir}"
+                     includes="**"/>
         </copy>
 
         <copy file="@{androidmanifest.path}" tofile="${m.aapt.build.apk}/image/AndroidManifest.xml"/>
@@ -150,8 +155,9 @@
             <arg line="-S" />
             <arg value="@{androidresources.path}"/>
 
+            <!-- implicit image layout
             <arg line="-A" />
-            <arg value="${m.aapt.build.apk}/image/lib/assets"/>
+            <arg value="${m.aapt.build.apk}/image/assets"/> -->
 
             <arg line="-I" />
             <arg line="${android.jar}"/>