added a prefernces screen to handle media card selection on Android devices. Contains actual fix for 4297.

Added a place marker to allow volume change during app.  Right now it's either loud or off.  There isn't a way to allow the volume to gradually go up and odwn based on the values set in settings.

JGE/include/JGE.h

@@ -126,6 +126,7 @@ class JGE
 #endif
 
 #if defined (ANDROID)
+    JavaVM * mJavaVM;
     JNIEnv * mJNIEnv;
     jclass mJNIClass;
     jmethodID midSendCommand;
@@ -164,6 +165,10 @@ class JGE
   static JGE* GetInstance();
   static void Destroy();
 
+#ifdef ANDROID
+    JNIEnv * getJNIEnv();
+  void setJVM (JavaVM * vm);
+#endif
   void Init();
   void End();
 
@@ -377,6 +382,7 @@ class JGE
    /// Access to JNI Environment
    void SetJNIEnv(JNIEnv * env, jclass cls);
    void sendJNICommand(std::string command);
+   std::string getFileSystemLocation();
 #endif 
   
  protected:

JGE/include/JSoundSystem.h

@@ -82,6 +82,7 @@ public:
     SLObjectItf playerObject;
     SLPlayItf playInterface;
     SLSeekItf seekInterface;
+    SLVolumeItf musicVolumeInterface;
 #else
     void* mTrack;
 #endif  //WITH_FMOD
@@ -115,6 +116,7 @@ class JSample
 #elif defined ANDROID
     SLObjectItf playerObject;
     SLPlayItf playInterface;
+    SLVolumeItf sampleVolumeInterface;
     void* mSample;
 #else
     void* mSample;
@@ -242,9 +244,8 @@ protected:
 
 private:
 
-#ifdef WIN32
 	JMusic *mCurrentMusic;
-#endif
+    JSample *mCurrentSample;
 
 	int mVolume;
   int mMusicVolume;