Android: Cleanup ClassLoaderUtil/LauncherUtil - Using cached parent ClassLoader for SYS-Packages w/ native libs, and non cached child ClassLoader for USR-Packages

Android's Dalvik VM, like a JVM, cannot load a native library from one location by multiple ClassLoader.

Since we don't like to hardcode the system-packages, as it was before, i.e. "com.jogamp.common", "javax.media.opengl",
we need to either copy the libs or use parenting of cached ClassLoader.
The latter is chosen, since it's faster and uses less resources.

- System-packages are passed through from the user 'List<String> LauncherUtil.BaseActivityLauncher::getSysPackages()'
  to the ActivityLauncher, which instantiates the ClassLoader.

- No more hard-reference the system-packages in ClassLoaderUtil ("com.jogamp.common", "javax.media.opengl"),
  just use the new user provided system-packages.

- The system-packages denominate a hash-key for caching, a new ClassLoader is created and mapped
  if it does not yet exist.

- A non-chached user-packages ClassLoader is created using the cached system-packages ClassLoader as it's parent.

1 files changed, 12 insertions, 2 deletions

diff --git a/src/java/jogamp/android/launcher/ActivityLauncher.java b/src/java/jogamp/android/launcher/ActivityLauncher.java
index 0ac940e..6e2f261 100644
--- a/src/java/jogamp/android/launcher/ActivityLauncher.java
+++ b/src/java/jogamp/android/launcher/ActivityLauncher.java
@@ -55,7 +55,7 @@ public class ActivityLauncher extends Activity {
        data = LauncherUtil.DataSet.create(uri);
        data.setSystemProperties();
 
-       ClassLoader cl = ClassLoaderUtil.createClassLoader(this, data.getPackages(), false, null);
+       ClassLoader cl = ClassLoaderUtil.createClassLoader(this, data.getSysPackages(), data.getUsrPackages(), null);
        if(null != cl) {
            try {
                activityClazz = Class.forName(data.getActivityName(), true, cl);
@@ -135,8 +135,18 @@ public class ActivityLauncher extends Activity {
      Log.d(TAG, "onDestroy - S");
      callMethod(activityObject, mOnDestroy);
      if(null != data) {
+         activityObject=null;
+         mOnCreate=null;
+         mOnDestroy=null;
+         mOnPause=null;
+         mOnRestart=null;
+         mOnResume=null; 
+         mOnStart=null;
+         mOnStop=null;
+         mSetRootActivity=null;
+         activityClazz = null;
          data.clearSystemProperties();
-         data = null;
+         data = null;           
      }
      super.onDestroy();  
      Log.d(TAG, "onDestroy - X");