Hello Kularajini,
It solely depends on the project needs. If anybody needs an android app for cross platform then definitely framework is much important and you must choose the best framework as well.
It seems you are searching for a cross platform mobile app development framework. If yes, then there are many good frameworks available in the marketplace. But you have to choose according to your needs. Here are some best app development frameworks like "IONIC", "React Native", "Sencha" and "phone gap" etc. Among these we will prefer IONIC framework for the great package support and community, or simply if you don't need cross platform app development and looking for the best way to develop app for only android device use the latest android SDK.