Converting JSONObject to HashMap<>

Today, I had a huge Json in my app and I wanted to fetch all these values in a general way. I also wanted to parse Json for only one time to avoid try/catch each time I access any value. So, first thing I had in mind was to convert the JSONObject in the HashMap or Map<> etc.

So if you are using Gson in your apps for json mapping, then you can use this one line code for conversion.

Map<String, Object> mapObj = new Gson().fromJson(
  myJsonObjectString, new TypeToken<HashMap<String, Object>>() {}.getType()

This will give you a Map object and you can access the values using this code.

String strValue = (String) mapObj.get(myJsonKey);
String contains = mapObj.containsKey(myJsonKey);


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Wajahat Karim
🌍 Making the world a better place, one app at a time.
🔥 Google Developer Expert (GDE) in Android . 📱 Professional Android Developer with ~10 years experience. 💻 Creator of various Open Source libraries on Android . 📝 Author of two technical books and 100+ articles on Android. 🎤 A passionate Public Speaker giving talks all over the world.
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Wajahat Karim

🔥 Google Dev Expert (GDE) in Android .
📱 Android Dev. 💻 Open Source Contributor . 📝 Technical Writer . 🎤 Public Speaker

Senior Android Developer

Karachi, Pakistan