Android JSON Parsing Bug Fixing

We have an existing Android app that uses JSON parsing to navigate through a number of screens of basic text. There is a problem with data filtering based on the intents passed from one screen to another The total number of screens/activities is 5 and the web service APIs, the JSON parser and the code is already mostly there This is a simple task for any developer who have experience with JSON parsing. I need this to be done quickly and if you do it well you will be invited to bid on future phases of the same project. Please do not bid outside the budget- it's there for a reason!