This week's book giveaway is in the Java in General forum. We're giving away four copies of Java by Comparison (eBook) and have Simon Harrer, Jörg Lenhard, Linus Dietz on-line! See this thread for details.
I'm no Android expert so can't comment on "LargeHeap=true", but, I would advise you to be sure that your app's memory usage is legitimate and check that you don't have a memory leak. If you have a memory leak, then increasing the heap size is just putting off the inevitable.