How to create a JSONArray from a json file

Hello Everyone,

This time while working on creating a list for the recycler view, i tried loading it from a json file which i downloaded from internet.

Approach :

Place your json file in your Assests folder.
Create a string and start adding the contents of your json file into this string.
use this string as argument while declaraing your JSONArray.

See, its really simple.

Let me give you example on how to code this approach and get it working.

   try {
            String JsonString = loadJSONFromAsset();
            JSONArray jsonArray = new JSONArray(JsonString);
        } catch (JSONException e) {
            e.printStackTrace();
        }

try {

String JsonString = loadJSONFromAsset();

JSONArray jsonArray = new JSONArray(JsonString);

} catch (JSONException e) {

e.printStackTrace();

}

Now the Function loadJSONFromAsset();

public String loadJSONFromAsset() {
        String json = null;
        try {

            InputStream is = getAssets().open("my_json_file.json"); //Replace "my_json_file.json" with the name of your json file

            int size = is.available();

            byte[] buffer = new byte[size];

            is.read(buffer);

            is.close();

            json = new String(buffer, "UTF-8");


        } catch (Exception ex) {
            ex.printStackTrace();
            return null;
        }
        return json;

    }

public String loadJSONFromAsset() {

String json = null;

try {

InputStream is = getAssets().open("my_json_file.json"); //Replace "my_json_file.json" with the name of your json file

int size = is.available();

byte[] buffer = new byte[size];

is.read(buffer);

is.close();

json = new String(buffer, "UTF-8");

} catch (Exception ex) {

ex.printStackTrace();

return null;

}

return json;

}

That’s it !

Now you have got your JSONArray and you can use it simply as per your requirements.

Keep coding and keep sharing. : )

Android app

anchit 18 December 2016

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How to create a JSONArray from a json file

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