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, 9 insertions, 1 deletions

diff --git a/make/build.xml b/make/build.xml
index 1eaab32..7e1b6c0 100644
--- a/make/build.xml
+++ b/make/build.xml
@@ -696,6 +696,9 @@
         <exclude name="jogamp/common/os/android/**" />
         <exclude name="${jogamp.android-launcher.classes}" />
       </fileset>
+      <fileset dir="resources/assets">
+        <include name="**" />
+      </fileset>
     </jar>
 
     <copy file="Manifest-rt"
@@ -717,6 +720,9 @@
         <include name="jogamp/common/**" />
         <exclude name="${jogamp.android-launcher.classes}" />
       </fileset>
+      <fileset dir="resources/assets">
+        <include name="**" />
+      </fileset>
     </jar>
 
     <!-- Copy antlr.jar into build directory for convenience so
@@ -749,6 +755,7 @@
     <javac destdir="${classes}"
            includeAntRuntime="false"
            includes="${jogamp.android-launcher.classes}"
+           excludes="${jogamp.common.classes}"
            memoryMaximumSize="${javac.memorymax}"
            encoding="UTF-8"
            source="${target.sourcelevel}" 
@@ -777,6 +784,7 @@
     </jar>
 
     <aapt.signed 
+        assetsdir="resources/android/assets-launcher"
         jarbuilddir="${build}"
         jarbasename="jogamp.android-launcher"
         nativebuilddir="${build}"
@@ -802,6 +810,7 @@
   <target name="android.package" depends="gluegen.cpptasks.detect.os,gluegen.build.check.aapt" if="isAndroid" unless="gluegen.build.skip.aapt" >
 
     <aapt.signed 
+        assetsdir="resources/assets"
         jarbuilddir="${build}"
         jarbasename="gluegen-rt"
         nativebuilddir="${gluegen.lib.dir}"
@@ -813,7 +822,6 @@
         version.code="${gluegen_int_version}"
         version.name="${gluegen.version.plus}"
       />
-
   </target>
 
   <target name="base.compile" description="Base compile ensuring valid build results w/o tampering the artifacts.properties"