put back system.exit()

Author: codeanticode

core/src/processing/core/PApplet.java

@@ -3335,11 +3335,7 @@ public void exit() {
 
   void exit2() {
     try {
-      if (activity != null) {
-        activity.finishAffinity();
-        activity = null;
-      }
-//      System.exit(0);
+      System.exit(0);
     } catch (SecurityException e) {
       // don't care about applet security exceptions
     }
@@ -3368,6 +3364,12 @@ final public void dispose() {
       // https://github.com/processing/processing-android/issues/213#issuecomment-217348480
       surfaceView.getHolder().getSurface().release();
       surfaceView = null;
+      
+      // In API level 21 you can do
+      // activity.releaseInstance();
+      // to ask the app to free up its memory.
+      
+      activity = null;
     }
 
     handleMethods("dispose");