Developing an android application that handles a specific format of JSON data

Question

Developing an android application that handles a specific format of JSON data

I have received a JSON in the following format:

var list=[{"Name":"arun","City":"xyx","CountryName":"KUWAIT"},"Name":"Amal","City":"abb","CountryName":"BAHRAIN"}];

This JSON is sent from my web server to my Android app as a String value. I need to convert it into the proper JSON format. The size of the string may vary depending on certain conditions. So far, I have only dealt with and converted JSON strings and arrays that were received in this format:

{"Android":[{"slno":"1","name":"abc","number1":"123","number2":"456"},{"slno":"2","name":"def","number1":"789","number2":"000"},{"slno":"3","name":"","number1":"234","number2":"567"},{"slno":"4","name":"ghi","number1":"890","number2":"345"}]}

However, I am unsure how to convert the initial JSON string received in my Android app. Can someone please assist me in converting it properly? How can I go about achieving this conversion within my app?

javascript android json

Answer 1

Answer №1

I'm not sure what you mean by conversion. I assume you are looking to extract data from the given JSON format:

[ // Array of JSON objects
    {  // First JSON object
        "Name": "arun",
        "City": "xyx",
        "CountryName": "KUWAIT"
    },
    {  // Second JSON object
        "Name": "Amal",
        "City": "abb",
        "CountryName": "BAHRAIN"
    }
]

To extract the data, you can use the following code:

JSONArray jsonArray = new JSONArray("jsonString");
for(int index = 0; index < jsonArray.length(); index++)
{
     JSONObject jsonObject = (JSONObject) jsonArray.getJSONObject(index);
     String name = jsonObject.getString("Name");
     String city = jsonObject.getString("City");
     String country = jsonObject.getString("CountryName"); 
}

Answer 2

I'm not sure what you mean by conversion. I assume you are looking to extract data from the given JSON format:

[ // Array of JSON objects
    {  // First JSON object
        "Name": "arun",
        "City": "xyx",
        "CountryName": "KUWAIT"
    },
    {  // Second JSON object
        "Name": "Amal",
        "City": "abb",
        "CountryName": "BAHRAIN"
    }
]

To extract the data, you can use the following code:

JSONArray jsonArray = new JSONArray("jsonString");
for(int index = 0; index < jsonArray.length(); index++)
{
     JSONObject jsonObject = (JSONObject) jsonArray.getJSONObject(index);
     String name = jsonObject.getString("Name");
     String city = jsonObject.getString("City");
     String country = jsonObject.getString("CountryName"); 
}

Answer 3

Answer №2

When making an HTTP request, use the following code snippet (replace url with your actual URL):

HttpParams params = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(params, 500);

Client = new DefaultHttpClient(params);
httpget = new HttpGet(url);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
mContent = Client.execute(httpget, responseHandler);

To retrieve data from the response:

JSONObject jsonObject = new JSONObject(mContent);
String firstname = jsonObject.getString("firstName");
String id = jsonObject.getString("Name"");
String headline = jsonObject.getString("City");
String lastName = jsonObject.getString("CountryName");

Then, implement this code inside an asynctask:

FINAL CODE::

public class AsyncTaskActivity extends Activity implements OnClickListener {

        Button btn;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            btn = (Button) findViewById(R.id.button1);
            // because we implement OnClickListener we only have to pass "this"
            // (much easier)
            btn.setOnClickListener(this);
        }

        public void onClick(View view) {
            // detect the view that was "clicked"
            switch (view.getId()) {
            case R.id.button1:
                new LongOperation().execute("");
                break;
            }
        }

        private class LongOperation extends AsyncTask<String, Void, String> {

            @Override
            protected String doInBackground(String... params) {

                HttpParams params = new BasicHttpParams();
                HttpConnectionParams.setConnectionTimeout(params, 500);

               Client = new DefaultHttpClient(params);
               httpget = new HttpGet(url);
               ResponseHandler<String> responseHandler = new BasicResponseHandler();
               mContent = Client.execute(httpget, responseHandler);


              JSONObject jsonObject = new JSONObject(mContent);
              String firstname = jsonObject.getString("firstName");
              String id = jsonObject.getString("Name"");
              String headline = jsonObject.getString("City");
               String lastName = jsonObject.getString("CountryName");


                return "Executed";
            }

            @Override
            protected void onPostExecute(String result) {
                TextView txt = (TextView) findViewById(R.id.output);
                txt.setText("Executed"); 
            }

            @Override
            protected void onPreExecute() {}

            @Override
            protected void onProgressUpdate(Void... values) {}
        }
    }

If you encounter any debugging issues, feel free to let me know

Answer 4

When making an HTTP request, use the following code snippet (replace url with your actual URL):

HttpParams params = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(params, 500);

Client = new DefaultHttpClient(params);
httpget = new HttpGet(url);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
mContent = Client.execute(httpget, responseHandler);

To retrieve data from the response:

JSONObject jsonObject = new JSONObject(mContent);
String firstname = jsonObject.getString("firstName");
String id = jsonObject.getString("Name"");
String headline = jsonObject.getString("City");
String lastName = jsonObject.getString("CountryName");

Then, implement this code inside an asynctask:

FINAL CODE::

public class AsyncTaskActivity extends Activity implements OnClickListener {

        Button btn;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);
            btn = (Button) findViewById(R.id.button1);
            // because we implement OnClickListener we only have to pass "this"
            // (much easier)
            btn.setOnClickListener(this);
        }

        public void onClick(View view) {
            // detect the view that was "clicked"
            switch (view.getId()) {
            case R.id.button1:
                new LongOperation().execute("");
                break;
            }
        }

        private class LongOperation extends AsyncTask<String, Void, String> {

            @Override
            protected String doInBackground(String... params) {

                HttpParams params = new BasicHttpParams();
                HttpConnectionParams.setConnectionTimeout(params, 500);

               Client = new DefaultHttpClient(params);
               httpget = new HttpGet(url);
               ResponseHandler<String> responseHandler = new BasicResponseHandler();
               mContent = Client.execute(httpget, responseHandler);


              JSONObject jsonObject = new JSONObject(mContent);
              String firstname = jsonObject.getString("firstName");
              String id = jsonObject.getString("Name"");
              String headline = jsonObject.getString("City");
               String lastName = jsonObject.getString("CountryName");


                return "Executed";
            }

            @Override
            protected void onPostExecute(String result) {
                TextView txt = (TextView) findViewById(R.id.output);
                txt.setText("Executed"); 
            }

            @Override
            protected void onPreExecute() {}

            @Override
            protected void onProgressUpdate(Void... values) {}
        }
    }

If you encounter any debugging issues, feel free to let me know

Developing an android application that handles a specific format of JSON data

Answer №1

Answer №2

FINAL CODE::

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