Android: How to pass Json data to another activity from Json populated listview

Question

this is my first question on stackoverflow, and I'm kinda new to android (I'm an iOS developer). I'm using volley to populate a listview with Json data, now I want to handle the click on a listview item and pass all the data related to the item I clicked, to a new activity. How can I do that? Here is my "MainActivity" that I called "MenuActivity". Thanks in advance for your help ^^.

public class MenuActivity extends AppCompatActivity {
JSONArray contact = null;
private String urlJsonObj = "http://advadwords.it/Hotel_managing_app/index.php/Controller_managing_app/json_menu";
private static String TAG = MainActivity.class.getSimpleName();
private ProgressDialog pDialog;
//private String jsonResponse;
ArrayList<HashMap<String, String>> contactList;
ListView lv;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menu);
    contactList = new ArrayList<HashMap<String, String>>();
    lv = (ListView) findViewById(R.id.list);
    pDialog = new ProgressDialog(this);
    pDialog.setMessage("Sto caricando...");
    pDialog.setCancelable(false);
    makeJsonObjectRequest();


}
private void makeJsonObjectRequest() {
    pDialog.show();
    JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.GET,
            urlJsonObj, null, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            Log.d(TAG, response.toString());
            try {
                contact = response.getJSONArray("menu");
                for (int i = 0; i < contact.length(); i++) {
                    JSONObject details = (JSONObject) contact.get(i);
                    String giorno = details.getString("Giorno");
                    String pranzoPrimo = details.getString("Pranzo_primo");

                    HashMap<String, String> contct = new HashMap<String, String>();
                    contct.put("Giorno", giorno);
                    contct.put("Pranzo_primo", pranzoPrimo);

                    contactList.add(contct);


                    //adapter to set response in textview
                    ListAdapter adapter = new SimpleAdapter(
                            MenuActivity.this, contactList,
                            R.layout.list_item, new String[]{"Giorno", "Pranzo_primo"}, new int[]{R.id.name, R.id.primoPranzo});
                    lv.setAdapter(adapter);
                }
            } catch (JSONException e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(),
                        "Error: " + e.getMessage(),
                        Toast.LENGTH_LONG).show();
            }
            hidepDialog();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            Toast.makeText(getApplicationContext(),
                    error.getMessage(), Toast.LENGTH_SHORT).show();
            // hide the progress dialog
            hidepDialog();
        }
    });
    AppController.getInstance().addToRequestQueue(jsonObjReq);
}
private void showpDialog() {
    if (!pDialog.isShowing())
        pDialog.show();
}
private void hidepDialog() {
    if (pDialog.isShowing())
        pDialog.dismiss();
}

}

John Joe · Answer 1 · 2016-01-20T03:11:34.040

0

I want to handle the click on a listview item and pass all the data related to the item I clicked, to a new activity.

You have to implement onItemClickListener in your listView. When list clicked, pass the ID to another activity and finally retrieved all the data which belongs to ID in the activity.

  lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> listView, View view,
                                    int position, long id) {
                HashMap<String, String> clickedItem = contactList.get(position);
                ID=clickedItem.get(Configs.TAG_ID); // your key ID
                Toast.makeText(getApplicationContext(),"Edit"+ID,Toast.LENGTH_LONG).show();
                Intent intent = new Intent(getApplicationContext(), ActivityB.class);
                intent.putExtra("ID", ID); // pass the ID to another activity
                startActivity(intent);
            }
        });

edited Jan 20 '16 at 03:11

answered Jan 19 '16 at 18:09

John Joe

12,412
16
70
135

I've tried to copy this code into the onCreate method, but it gives me a couple of errors. The first one in "lvt.get(position);", the second one in Configs.TAG_ID – Tizio Fit Jan 19 '16 at 18:34
yes,because I just give you some hints. Would you mind to tell me the error ? – John Joe Jan 19 '16 at 18:36
It says "Cannot resolve method get(int)" and "Cannot resolve symbol Configs" – Tizio Fit Jan 19 '16 at 18:54
The Configs you have to change ...what is the key you used for ID ? – John Joe Jan 20 '16 at 01:20
The key is called "id". – Tizio Fit Jan 20 '16 at 15:57
ID=clickedItem.get("id"); – John Joe Jan 20 '16 at 16:08

Android: How to pass Json data to another activity from Json populated listview

1 Answers1