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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

By : Ray Rischpater, Brian Ritchie
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The JavaScript JSON Cookbook

The JavaScript JSON Cookbook

1 (2)
By: Ray Rischpater, Brian Ritchie

Overview of this book

If you're writing applications that move structured data from one place to another, this book is for you. This is especially true if you've been using XML to do the job because it's entirely possible that you could do much of the same work with less code and less data overhead in JSON. While the book's chapters make some distinction between the client and server sides of an application, it doesn't matter if you're a frontend, backend, or full-stack developer. The principles behind using JSON apply to both the client and the server, and in fact, developers who understand both sides of the equation generally craft the best applications.
Table of Contents (12 chapters)
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11
Index

Parsing JSON on Android

Android provides the JSONObject class, which lets you represent the name-value pairs of JSON documents through an interface that's conceptually similar to a map, and includes serialization and deserialization through getter and setter methods that access the named fields of a JSON object.

How to do it…

You begin by initializing JSONObject with the JSON that you want to parse and then use its various get methods to obtain the values of the JSON fields:

Import org.json.JSONObject;

String json = "…";
JSONObject data = new JSONObject(data);

String call = data.getString("call");
double lat = data.getDouble("lat");
double lng = data.getDouble("lng");

How it works…

The JSONObject constructor takes the JSON to parse and provides accessor methods to access the fields of the JSON. Here, we use the getString and getDouble accessors to access the call, lat, and lng fields of the JSON respectively.

The JSONObject class...

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