I developing a game using andengine. In J2me game when exit , i made all object as null
ie:
Image img;
Sprite s1;
When exit application ,
img=null;
s1=null;
In android i will use System.gc() or i need to make all texture, textureRegion and sprite as make as null, when exit appliaction ?
Java garbage collection should take care of that. You don't need to do that.
However I would close open connections, file handles, etc..
System.gc() is just a hint to the JVM that garbage collection is suggested, however Java is running it at its own will.