Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
735 views
in Technique[技术] by (71.8m points)

android - How to store json object to shared preferences?

I am creating an application,In my app I am getting response and displaing it in custom alert dialog, Till here it works fine, Now what I am trying to do is if user selects an item from alert dialog once, it should store it in preference so that no need of fetch the data every time.

Following is my code snippet.

The following response which i am getting is :

    {
    "states": [
        {
            "id": "1",
            "state_slug": "agra",
            "statename": "Agra"
        },
        {
            "id": "2",
            "state_slug": "andaman_and_nicobar_islands",
            "statename": "Andaman and Nicobar Islands"
        },
        {
            "id": "3",
            "state_slug": "andhra_pradesh",
            "statename": "Andhra Pradesh"
        },
        {
            "id": "4",
            "state_slug": "arunachal_pradesh",
            "statename": "Arunachal Pradesh"
        },
        {
            "id": "5",
            "state_slug": "assam",
            "statename": "Assam"
        },
        {
            "id": "6",
            "state_slug": "bihar",
            "statename": "Bihar"
        },
        {
            "id": "7",
            "state_slug": "bulandshahr",
            "statename": "Bulandshahr"
        },
        {
            "id": "8",
            "state_slug": "chhattisgarh",
            "statename": "Chhattisgarh"
        },
        {
            "id": "9",
            "state_slug": "dadra_and_nagar_haveli",
            "statename": "Dadra & Nagar Haveli"
        },
        {
            "id": "10",
            "state_slug": "daman_and_diu",
            "statename": "Daman & Diu"
        },
        {
            "id": "11",
            "state_slug": "delhi",
            "statename": "Delhi"
        },
        {
            "id": "12",
            "state_slug": "farrukhabad",
            "statename": "Farrukhabad"
        },
        {
            "id": "13",
            "state_slug": "goa",
            "statename": "Goa"
        },
        {
            "id": "14",
            "state_slug": "gujarat",
            "statename": "Gujarat"
        },
        {
            "id": "15",
            "state_slug": "haryana",
            "statename": "Haryana"
        },
        {
            "id": "16",
            "state_slug": "himachal_pradesh",
            "statename": "Himachal Pradesh"
        },
        {
            "id": "17",
            "state_slug": "jammu_and_kashmir",
            "statename": "Jammu & Kashmir"
        },
        {
            "id": "18",
            "state_slug": "jharkhand",
            "statename": "Jharkhand"
        },
        {
            "id": "19",
            "state_slug": "karnataka",
            "statename": "Karnataka"
        },
        {
            "id": "20",
            "state_slug": "kerala",
            "statename": "Kerala"
        },
        {
            "id": "21",
            "state_slug": "lakshadweep",
            "statename": "Lakshadweep"
        },
        {
            "id": "22",
            "state_slug": "madhya_pradesh",
            "statename": "Madhya Pradesh"
        },
        {
            "id": "23",
            "state_slug": "maharashtra",
            "statename": "Maharashtra"
        },
        {
            "id": "24",
            "state_slug": "manipur",
            "statename": "Manipur"
        },
        {
            "id": "25",
            "state_slug": "meghalaya",
            "statename": "Meghalaya"
        },
        {
            "id": "26",
            "state_slug": "mizoram",
            "statename": "Mizoram"
        },
        {
            "id": "27",
            "state_slug": "nagaland",
            "statename": "Nagaland"
        },
        {
            "id": "28",
            "state_slug": "orissa",
            "statename": "Orissa"
        },
        {
            "id": "29",
            "state_slug": "pondicherry",
            "statename": "Pondicherry"
        },
        {
            "id": "30",
            "state_slug": "punjab",
            "statename": "Punjab"
        },
        {
            "id": "31",
            "state_slug": "purulia",
            "statename": "Purulia"
        },
        {
            "id": "32",
            "state_slug": "rajasthan",
            "statename": "Rajasthan"
        },
        {
            "id": "33",
            "state_slug": "sikkim",
            "statename": "Sikkim"
        },
        {
            "id": "34",
            "state_slug": "tamil_nadu",
            "statename": "Tamil Nadu"
        },
        {
            "id": "35",
            "state_slug": "tripura",
            "statename": "Tripura"
        },
        {
            "id": "36",
            "state_slug": "uttar_pradesh",
            "statename": "Uttar Pradesh"
        },
        {
            "id": "37",
            "state_slug": "uttarakhand",
            "statename": "Uttarakhand"
        },
        {
            "id": "38",
            "state_slug": "west_bengal",
            "statename": "West Bengal"
        }
    ]
}

I am displaying statename in my alert dialog,

class LoadAllStates extends AsyncTask<String, String, ArrayList<HashMap<String,String>>> {

          ArrayAdapter<String> adapterallstates ;
        private ProgressDialog pDialog;

            @Override
            protected void onPreExecute() {
                super.onPreExecute();
                pDialog = new ProgressDialog(MainActivity.this);
                pDialog.setMessage("Please wait..");
                pDialog.setIndeterminate(true);
               // pDialog.setIndeterminateDrawable(getResources().getDrawable(R.drawable.custom_progress));
                pDialog.setCancelable(true);
                pDialog.show();

            }
            protected ArrayList<HashMap<String,String>> doInBackground(String... args) {
                ServiceHandler sh = new ServiceHandler();

                // Making a request to url and getting response
                statedata = new ArrayList<HashMap<String, String>>();
                String jsonStr = sh.makeServiceCall(STATE_URL, ServiceHandler.GET);

                Log.d("Response: ", "> " + jsonStr);

                if (jsonStr != null) {
                    try {
                        JSONObject jsonObj = new JSONObject(jsonStr);
                        state_list = jsonObj.getJSONArray(COUNTRY_LIST);

                        // looping through All Contacts
                        for (int i = 0; i < state_list.length(); i++) {
                            JSONObject c = state_list.getJSONObject(i);

                            // creating new HashMap
                            HashMap<String, String> map = new HashMap<String, String>();

                            // adding each child node to HashMap key => value
                              map.put(STATE_SLG, c.getString(STATE_SLG));
                          map.put(STATE_ID, c.getString(STATE_ID));
                            map.put(STATE_NAME,c.getString(STATE_NAME));

                           statedata.add(map);

                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                } else {
                    Log.e("ServiceHandler", "Couldn't get any data from the url");
                }

                return statedata;
            }

            protected void onPostExecute(ArrayList<HashMap<String,String>> result) {

                super.onPostExecute(result);
               pDialog.dismiss();

                String[] arrallstates=new String[statedata.size()];
                for(int index=0;index<statedata.size();index++){
                          HashMap<String, String> map=statedata.get(index);
                      arrallstates[index]=map.get(STATE_NAME);
                 }  


                 // pass arrConuntry array to ArrayAdapter<String> constroctor :
                adapterallstates = new ArrayAdapter<String>(MainActivity.this,
                                    android.R.layout.simple_spinner_dropdown_item,
                                                                          arrallstates);
                spstate.setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View w) {
                          new AlertDialog.Builder(MainActivity.this)
                          .setTitle("Select")
                          .setAdapter(adapterallstates, new DialogInterface.OnClickListener() {

                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                                spstate.setText(adapterallstates.getItem(which).toString());

                                 try {

                                     String n  = state_list.getJSONObject(which).getString("state_slug");


                                    statename=state_list.getJSONObject(which).getString("state_slug");
                                    stnm=state_list.getJSONObject(which).getString(STATE_NAME);

                                     Log.d("Response statenm: ", "> " + statename);

                                     SharedPreferences.Editor editor = sharedpreferences.edit();

                                        editor.putString(States, n);
                                        editor.commit();
                                     new LoadAllStatesCity().execute();

                                    // Toast.makeText(getActivity(), statename, Toast.LENGTH_LONG).show();
                                } catch (JSONException e) {
                                    // TODO Auto-generated catch block
                                    e.printStackTrace();
                                }

                              dialog.dismiss();
                            }
                          }).create().show();
                        }
                });

            }
     }
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

if you want to store the response the better way is to write the content into a file.if you want to store only some values you can do like this

SharedPreferences.Editor editor = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
 editor.putString("key_from_json", "String_value_from_json");
 editor.putInt("key_from_json","int_value_from_json");
 editor.commit();

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...