You can’t increase the heap size dynamically. But one immediate solution for dealing with large memory requirements is to request a large Dalvik heap for your app. You can do this by adding android:largeHeap="true" to your <application> tag in AndroidManifest.xml. But this will not work on any pre Honeycomb devices and there is no guarantee how large the large heap will be.
Attention !
It is strongly advised that you don’t use a large heap just to allow higher memory usage. You should always optimize your memory usage, because -
Firstly, a large heap on low-memory, low-end devices can still be too small for your application.
Secondly, using this may adversely affect your app performance. Because you are telling system to increase the maximum heap limit. When this happens it will take more time for garbage collection. If you check the log you can see that GC Pause time will be greater. Ideally it should be between 2–5ms.In this case it can vary even up-to 30–45ms. So don’t set large heap property to true just because you are getting out of memory. Use it as the very last step.Otherwise it will be a performance hit.
