json search bar in android appthat searches a json file from an api server

Question

i want to have a search bar that searches a number that has been typed in (for example: 115048) and put that in a listview. the json file looks like this http://api.ccapp.it/v1/student/115048/schedule/11 hope someone can help me, the code that i use right now to search a link is like this but it doesnt have a search bar:

public class RoosterviewMd extends ListActivity {

    Button mButton;
    EditText mEdit;

    private ProgressDialog pDialog;

    // URL to get contacts JSON
    //private static String id = null;
    //private static String url = "http://api.ccapp.it/v1/student/" + id + "/schedule/11";
    private static String url = "http://api.ccapp.it/v1/student/115048/schedule/12";

    // JSON Node names
    private static final String TAG_LESSON = "class";
    private static final String TAG_ROOM = "room";
    private static final String TAG_TEACHER = "teacher";

    // contacts JSONArray
    JSONArray contacts = null;

    // Hashmap for ListView
    ArrayList<HashMap<String, String>> contactList;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.roosterviewmd);

        //Number input
        final EditText input = (EditText) findViewById(R.id.editText2);



        //buttons for all the days

        Button btn2 = (Button) findViewById(R.id.button29);
        btn2.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v)
            {
                Toast.makeText(getBaseContext(), "Je ziet je rooster voor maandag al" , Toast.LENGTH_SHORT ).show();

            }
        });

        Button btnOne = (Button)findViewById(R.id.button30);

        btnOne.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(getApplicationContext(), RoosterviewDi.class);
                startActivity(intent);
            }
        });

        Button btnTwo = (Button)findViewById(R.id.button31);

        btnTwo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(getApplicationContext(), RoosterviewWo.class);
                startActivity(intent);
            }
        });

        Button btnThree = (Button)findViewById(R.id.button32);

        btnThree.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(getApplicationContext(), RoosterviewDo.class);
                startActivity(intent);
            }
        });

        Button btnFour = (Button)findViewById(R.id.button33);

        btnFour.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent intent = new Intent(getApplicationContext(), RoosterviewVr.class);
                startActivity(intent);
            }
        });
        //Buttons end here

        contactList = new ArrayList<HashMap<String, String>>();

        ListView lv = getListView();

        // Listview on item click listener
        lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                // getting values from selected ListItem
                String lesson = ((TextView) view.findViewById(R.id.lesson))
                        .getText().toString();
                String teacher = ((TextView) view.findViewById(R.id.teacher))
                        .getText().toString();
                String room = ((TextView) view.findViewById(R.id.room))
                        .getText().toString();



            }
        });

        // Calling async task to get json
        new GetContacts().execute();

    }

    /**
     * Async task class to get json by making HTTP call
     * */
    private class GetContacts extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog
            pDialog = new ProgressDialog(RoosterviewMd.this);
            pDialog.setMessage("Give me a second please");
            pDialog.setCancelable(false);
            pDialog.show();

        }

        @Override
        protected Void doInBackground(Void... arg0) {
            // Creating service handler class instance
            ServiceHandler sh = new ServiceHandler();

            // Making a request to url and getting response
            String jsonStr = sh.makeServiceCall(url, ServiceHandler.GET);

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

            if (jsonStr != null) {
                try {
                    JSONObject jsonObj = new JSONObject(jsonStr);

                    JSONArray arr1 = jsonObj.getJSONArray("lessons");


                    JSONArray arr2 = arr1.getJSONArray(0); //Dag

                    for (int b = 0; b < arr2.length(); b++) {
                        JSONObject c = arr2.getJSONObject(b);

                        String lesson = c.getString(TAG_LESSON);
                        String teacher = c.getString(TAG_TEACHER);
                        String room = c.getString(TAG_ROOM);



                        // tmp hashmap for single contact
                        HashMap<String, String> contact = new HashMap<String, String>();

                        // adding each child node to HashMap key => value
                        contact.put(TAG_LESSON, lesson);
                        contact.put(TAG_TEACHER, teacher);
                        contact.put(TAG_ROOM, room);

                        // adding contact to contact list
                        contactList.add(contact);
                    }



                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } else {
                Log.e("CCApp", "Couldn't get any data from the url");
                Toast.makeText(getBaseContext(),"We are aware of this error and are working on it, in the mean time eat a cookie", Toast.LENGTH_LONG).show();
            }

            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
            // Dismiss the progress dialog
            if (pDialog.isShowing())
                pDialog.dismiss();
            /**
             * Updating parsed JSON data into ListView
             * */
            ListAdapter adapter = new SimpleAdapter(RoosterviewMd.this, contactList,
    R.layout.list_item, new String[] {TAG_LESSON,  TAG_TEACHER,
    TAG_ROOM }, new int[] { R.id.lesson,
    R.id.teacher, R.id.room });





            setListAdapter(adapter);
        }



    }

}

i hope someone can help me with this

Answer 1

Check out this answer: Get text from web page to string

Basically, you can simply get the text from the page and pass it into a string, and search the string application side for the contents of your edit text.

If you're looking for more functionality with the data from the web site, I would pull the Json into an array of Jsonobjects using something like Gson. You'd then be able to use the data from the web page in a bit more of a structured manner.

Edit: Now to actually answer your question.

You can include an edit text and button in your xml in order to search using a basic search bar kinda thing.

To set a listener on the button, you would do something like:

findViewById(R.id.button).setOnClickListener(new OnClickListener(){
  @Override
  protected void onClick(View v){
    //Here, we can control what the response to the button press is, and grab the text in the edit text field.
    String editTextString = findViewById(R.id.edittext).getEditableText().toString();
    //Now we have a string used to parse the json or whatever else you need to do. 
    //May want to add a case here if editTextString is null to prevent runtime errors.
  }
}

(Forgive me if there's any minor syntatic errors, just wrote that up quick here in the browser, no API to check on it. :))