I have made a spinner dynamically during a login process. I'd like to be able to return the value of the spinner when I click on an option but it doesn't seem to work.
I make the spinner here:
public Spinner page_spinner;
protected void onCreate(Bundle savedInstanceState){
...
page_spinner = (Spinner) findViewById(R.id.page_spinner);
...
//MAKE ARRAY HERE
GraphRequest requestPage = GraphRequest.newGraphPathRequest(
currentAccessToken,
"/me/accounts",
new GraphRequest.Callback() {
#Override
public void onCompleted(GraphResponse response) {
JSONArray jsonArray = null;
try {
jsonArray = response.getJSONObject().getJSONArray("data");
for(int i=0; i < jsonArray.length(); i++){
JSONObject page = jsonArray.getJSONObject(i);
String pageName = page.getString("name");
if(!pageName.equals("")) {
//Push names into the array
pages_array.add(pageName);
} else {
pages_array.clear();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
Bundle pageParameters = new Bundle();
pageParameters.putString("fields", "name,access_token,picture{url}");
requestPage.setParameters(pageParameters);
requestPage.executeAsync();
...
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(StartPage.this, android.R.layout.simple_spinner_item, pages_array);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
page_spinner.setAdapter(spinnerArrayAdapter);
spinnerArrayAdapter.notifyDataSetChanged();
then I try to use the spinner here:
page_spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Log.d("***********", "THIS ");
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
Log.d("***********", "THIS ");
}
});
I don't ever get the Log.d or even if I made Toast there, it doesn't fire. Not sure why this is stopping and I'm not getting any errors.
Any ideas?
Declare the spinner as a global variable and without final
and try this:
page_spinner = (Spinner) findViewById(R.id.page_spinner);
...
//MAKE ARRAY HERE
GraphRequest requestPage = GraphRequest.newGraphPathRequest(
currentAccessToken,
"/me/accounts",
new GraphRequest.Callback() {
#Override
public void onCompleted(GraphResponse response) {
JSONArray jsonArray = null;
try {
jsonArray = response.getJSONObject().getJSONArray("data");
for(int i=0; i < jsonArray.length(); i++){
JSONObject page = jsonArray.getJSONObject(i);
String pageName = page.getString("name");
if(!pageName.equals("")) {
//Push names into the array
pages_array.add(pageName);
} else {
pages_array.clear();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(StartPage.this, android.R.layout.simple_spinner_item, pages_array);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
page_spinner.setAdapter(spinnerArrayAdapter);
spinnerArrayAdapter.notifyDataSetChanged();
}
});
Your error seems somewhat correct. You are not notifying adapter about the changes in dataset.
Firstly, Your request is executed Async. So, your code execution will continue to next lines. So I guess, a blank array (size 0) is passed to ArrayAdapter<> and then the adapter is set to Spinner and then you are calling notifyDataSetChanged().
I think you should call spinnerArrayAdapter.notifyDataSetChanged();as below:
#Override
public void onCompleted(GraphResponse response) {
JSONArray jsonArray = null;
try {
jsonArray = response.getJSONObject().getJSONArray("data");
for(int i=0; i < jsonArray.length(); i++){
JSONObject page = jsonArray.getJSONObject(i);
String pageName = page.getString("name");
if(!pageName.equals("")) {
//Push names into the array
pages_array.add(pageName);
} else {
pages_array.clear();
}
}
spinnerArrayAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
I've tested your codes and everything seems Right here. First I tried Adding 10 Items at spinner. Everything worked fine. And I tested adding List of String which contains only one Item.
List<String> spinnerArray = new ArrayList<String>();
spinnerArray.add("Item 1");
My OnItemSelectedListener
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "Selected", Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
But what happened is the code everything worked fine before was not working after because there is only one item in spinnerArray. Toast was shown when Activity loads and not called when item is selected. You may have the same issue there. So my suggestion is give priority to your Array which may contain only one item.
Related
I don't know why the items added to ArrayList won't populate ListView, I tried checking if items are indeed added to ArrayList but it shows it does.
You can check the image of the added items here
Here is my code. I'm using another xml for checkedtextview so my listview will display items with checkboxes.
ArrayList<String> symptomsListTest = new ArrayList<>();
ListView chl1;
String URL = "***********";
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sample);
addListItem();
chl1 = (ListView) findViewById(R.id.checklistSample);
chl1.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
ArrayAdapter<String> aa = new ArrayAdapter<String>(this, R.layout.symptoms_checklist, R.id.txt_title, symptomsListTest);
//ArrayAdapter<String> aa=new ArrayAdapter<String>(this,R.layout.symptoms_checklist, R.id.txt_title,symptomsListTest);
chl1.setAdapter(aa);
chl1.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
String selectedItem = ((TextView) view).getText().toString();
if(symptomsListTest.contains(selectedItem))
{
symptomsListTest.remove(selectedItem); //remove deselected item from the list of selected items
}
else
{
symptomsListTest.add(selectedItem); //add selected item to the list of selected items
}
}
});
}
public void addListItem()
{
StringRequest stringRequest = new StringRequest(Request.Method.POST, URL,
new Response.Listener<String>()
{
#Override
public void onResponse(String response)
{
try
{
JSONObject jsonObject = new JSONObject(response);
String success = jsonObject.getString("success");
String message = jsonObject.getString("message");
JSONArray jsonArray = jsonObject.getJSONArray("read");
if(success.equals("1"))
{
for(int i = 0; i < jsonArray.length(); i++)
{
JSONObject object = jsonArray.getJSONObject(i);
String symptom = object.getString("symptom1");
symptomsListTest.add(symptom);
//Toast.makeText(SAMPLE.this, ""+symptom, Toast.LENGTH_SHORT).show();
//Toast.makeText(Login.this, ""+message+"\nYour name is: "+name+"\nYour email is: "+email,Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(SAMPLE.this, ""+message,Toast.LENGTH_SHORT).show();
}
}
catch (JSONException e)
{
e.printStackTrace();
Toast.makeText(SAMPLE.this, e.toString(),Toast.LENGTH_SHORT).show();
}
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error)
{
Toast.makeText(SAMPLE.this, error.toString(),Toast.LENGTH_SHORT).show();
}
})
{
#Override
protected Map<String, String> getParams() throws AuthFailureError
{
Map<String, String> params = new HashMap<>();
String result="success";
params.put("result", result);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
You are executing an AsyncTask which is giving a response after sometime, meanwhile the code of listView and it's adapter is already executed. You just need to add one line after the for loop like this :-
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject object = jsonArray.getJSONObject(i);
String symptom = object.getString("symptom1");
symptomsListTest.add(symptom);
//Toast.makeText(SAMPLE.this, ""+symptom, Toast.LENGTH_SHORT).show();
//Toast.makeText(Login.this, ""+message+"\nYour name is: "+name+"\nYour email is: "+email,Toast.LENGTH_SHORT).show();
}
//** Add This line **
aa.notifyDataSetChanged();
And make sure your ArrayAdapter is declared global. Hope this helps.
Json File:
{
"Iraq":["Baghdad","Karkh","Sulaymaniyah","Kirkuk","Erbil","Basra","Bahr","Tikrit","Najaf","Al Hillah","Mosul","Haji Hasan","Al `Amarah","Basere","Manawi","Hayat"],
"Lebanon":["Beirut","Zgharta","Bsalim","Halba","Ashrafiye","Sidon","Dik el Mehdi","Baalbek","Tripoli","Baabda","Adma","Hboub","Yanar","Dbaiye","Aaley","Broummana","Sarba","Chekka"]
}
I need to display country name in first spinner and city name in second spinner as per selected countries of spinner.
How to code it android?
My Code:
public class Search_for_room extends Activity {
JSONObject jsonobject;
JSONArray jsonarray;
ProgressDialog mProgressDialog;
ArrayList<String> worldlist;
ArrayList<CollegeList> world;
String value,key;
List<String> al;
ArrayAdapter<String> adapter;
HashMap<String, String> m_li = new HashMap<String, String>();
public ArrayList<SpinnerModel> CustomListViewValuesArr = new ArrayList<SpinnerModel>();
CustomAdapterStatus customAdapter;
Search_for_room activity = null;
Spinner spinner;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search_for_room);
activity = this;
ArrayList<String> items=getCountries("countriesToCities.json");
spinner=(Spinner)findViewById(R.id.spCountry);
spinnerCity=(Spinner)findViewById(R.id.spCity);
}
private ArrayList<String> getCountries(String fileName){
JSONArray jsonArray=null;
ArrayList<String> cList=new ArrayList<String>();
try {
InputStream is = getResources().getAssets().open(fileName);
int size = is.available();
byte[] data = new byte[size];
is.read(data);
is.close();
String json = new String(data, "UTF-8");
JSONObject jsonObj = new JSONObject(json);
// JSONObject resultObject = jsonObj.getJSONObject("result");
System.out.print("======Key: "+jsonObj);
Iterator<String> stringIterator = jsonObj.keys();
while(stringIterator.hasNext()) {
key = stringIterator.next();
value = jsonObj.getString(key);
System.out.println("------------"+key);
m_li.put(key,value);
al = new ArrayList<String>(m_li.keySet());
final SpinnerModel sched = new SpinnerModel();
/******* Firstly take data in model object ******/
sched.setCountryName(value);
// sched.setImage(key);
sched.setStates(key);
/******** Take Model Object in ArrayList **********/
CustomListViewValuesArr.add(sched);
Resources res = getResources();
customAdapter = new CustomAdapterStatus(activity, R.layout.spinner_item, CustomListViewValuesArr,res);
spinner.setAdapter(adapter);
}
}catch (JSONException ex){
ex.printStackTrace();
/*jsonArray=new JSONArray(json);
if (jsonArray != null) {
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jobj = jsonArray.getJSONObject(i);
System.out.pri
//cList.add(String.valueOf(jobj.keys()));
}
}*/
}catch (IOException e){
e.printStackTrace();
}
return cList;
}
}
try this code it can help you
try {
// load json from assets
JSONObject obj = new JSONObject(loadJSONFromAsset());
// than get your both json array
JSONArray IraqArray = obj.getJSONArray("Iraq");
JSONArray LebanonArray = obj.getJSONArray("Lebanon");
// declare your array to store json array value
String Iraq[] = new String[IraqArray.length()];
String Lebanon[] = new String[LebanonArray.length()];
//get json array of Iraq
for (int i = 0; i < IraqArray.length(); i++) {
Iraq[i] = IraqArray.getString(i);
}
//get json array of Lebanon
for (int i = 0; i < LebanonArray.length(); i++) {
Lebanon[i] = LebanonArray.getString(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
ask me in case of any query
add menu item in spinner
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/spinner"
android:title="Select Week"
app:actionViewClass="android.widget.Spinner"
android:textColor="#android:color/white"
android:textSize="11dp"
app:showAsAction="always" />
</menu>
add your json to array list
public void onPostExecute(String response) {
try {
list.clear();
MatchData vid = null;
Gson gson = new Gson();
JSONObject object = new JSONObject(response);
JSONArray array = object.getJSONArray("items");
for (int i = 0; i < array.length(); i++) {
vid = gson.fromJson(array.getJSONObject(i).toString(), MatchData.class);
list.add(vid);
}
matchDataAdapter = new MatchDataAdapter(MainActivity.this, list);
mRecyclerView.setAdapter(matchDataAdapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
finally set adapter to spinner
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.android_action_bar_spinner_menu, menu);
MenuItem item = menu.findItem(R.id.spinner);
Spinner spinner = (Spinner) MenuItemCompat.getActionView(item);
**ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, lists);**
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selected = (String) parent.getSelectedItem();
Toast.makeText(getApplicationContext(),selected,Toast.LENGTH_LONG).show();
week = Integer.parseInt(selected);
requestforinfo();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
return true;
}
You had done everything correct uptil now. Just make my suggestion and you are good to go with long list of JSON data.
First make the JSON Response of file accessible to whole activity/fragment by declaring at top.
Added following function to retrieve cityList of particular country:
private ArrayList<String> getCityList(String countryName){
ArrayList<String> cityList = new ArrayList<>();
//Here jsonObj is the your JSON response from the file.
try {
JSONArray jArray =jsonObj.getJSONArray(countryName);
for(int i=0;i<jArray.length();i++){
cityList.add(jArray.getString(i));
}
} catch (JSONException e) {
e.printStackTrace();
}
return cityList;
}
Then add on spinnerItemSelected call the below function:
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selected = ((SpinnerModel) parent.getSelectedItem()).getCountryName();
//For sake of your answer I had used String Array and ArrayAdapter. You can modify as you want.
ArrayAdapter<String> cityAdapter = new ArrayAdapter<String>(YourActivity.this, R.layout.single_textview,getCityList(selected));
spinnerCity.setAdapter(cityAdapter);
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
I am trying to fetch data from server into my spinner but its not showing any item in spinner , and i am not getting any logcat error also..i have taken this from 1 example , in my json output i want to fetch only name of country ..but its not showing anything:
this is my java class:
pmcountry = (Spinner) findViewById(R.id.country);
//citySpinner = (Spinner) findViewById(City);
//locationSpinner = (Spinner) findViewById(R.id.Location);
pmcountry .setOnItemSelectedListener(this);
country_list = new ArrayList<String>();
//location_list = new ArrayList<String>();
// city_list = new ArrayList<String>();
getData();
}
private void getData(){
StringRequest stringRequest = new StringRequest(Config.DATA_URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
JSONObject j = null;
try {
Log.d("Test",response);
JSONArray result = new JSONArray(response);
//Calling method getCountry to get the Country from the JSON Array
getCountry(result);
} catch (JSONException e) {
e.printStackTrace();
}
}
},new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}});
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(stringRequest);
}
private void getCountry(JSONArray jsonArrayCountry){
//Traversing through all the items in the json array
List<Country> countries = new ArrayList<>();
try {
String country_name, country_code;
JSONObject countries_object;
for (int i = 0; i < jsonArrayCountry.length(); i++) {
countries_object = jsonArrayCountry.getJSONObject(i);
country_code = countries_object.getString("id");
country_name = countries_object.getString("Name");
countries.add(new Country(country_code, country_name));
}
/*ArrayAdapter countryAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, countries);
pmcountry.setPrompt("--Select Country--");
pmcountry.setAdapter(countryAdapter);
pmcountry.setAdapter(new NothingSelectedSpinnerAdapter(countryAdapter,
R.layout.contact_spinner_row_nothing_selected,this));*/
pmcountry.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
} catch (JSONException e) {
}
}
You are trying to set the list of Custom Objects List<Country>
By default array adapter takes list of String. List<String>.
You have to tweak your code to set List of Custom objects in spinner.
Android: How to bind spinner to custom object list?
This should solve your problem.
Uncomment your , You are not setting data to spinner anywhere..
ArrayAdapter countryAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, countries);
pmcountry.setPrompt("--Select Country--");
pmcountry.setAdapter(countryAdapter);
pmcountry.setAdapter(new NothingSelectedSpinnerAdapter(countryAdapter,
R.layout.contact_spinner_row_nothing_selected,this));
I want to display person details from reg_farmer table.. If i select an item from the spinner, i want to display the corresponding data matches with that item from the database.
Here is my android MainActivity.class file..
public class MainActivity extends AppCompatActivity {
//Declaring an Spinner
private Spinner spinner,spinner2;
//An ArrayList for Spinner Items
private ArrayList<String> states;
private ArrayList<String> district;
//JSON Array
private JSONArray States;
private JSONArray District;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Initializing the ArrayList
states = new ArrayList<String>();
district = new ArrayList<String>();
//Initializing Spinner
spinner = (Spinner) findViewById(R.id.spinner);
spinner2 = (Spinner) findViewById(R.id.spinner2);
//Adding an Item Selected Listener to our Spinner
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String sid="";
try {
//Getting object of given index
JSONObject json = States.getJSONObject(position);
//Fetching id from that object
sid = json.getString("id");
} catch (JSONException e) {
e.printStackTrace();
}
getDistrict(sid);
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
Toast.makeText(MainActivity.this,"Nothing Selected",Toast.LENGTH_SHORT).show();
}
});
spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String Dname="";
try {
//Getting object of given index
JSONObject json = District.getJSONObject(position);
//Fetching name from that object
Dname = json.getString("dname");
} catch (JSONException e) {
e.printStackTrace();
}
Toast.makeText(MainActivity.this,Dname,Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
Toast.makeText(MainActivity.this,"Empty",Toast.LENGTH_SHORT).show();
}
});
//This method will fetch the States data from the URL
getStates();
}
private void getStates(){
//Creating a string request
StringRequest stringRequest = new StringRequest(Request.Method.POST,Config.DATA_State,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
JSONObject j = null;
try {
//Parsing the fetched Json String to JSON Object
j = new JSONObject(response);
//Storing the Array of JSON String to our JSON Array
States = j.getJSONArray("States");
for(int i=0;i< States.length();i++){
try {
//Getting json object
JSONObject state = States.getJSONObject(i);
//Adding the name of the state to array list
MainActivity.this.states.add(state.getString("name"));
} catch (JSONException e) {
e.printStackTrace();
}
}
//Setting adapter to show the items in the spinner
spinner.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, states));
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this,error.toString(),Toast.LENGTH_LONG).show();
}
});
//Creating a request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(stringRequest);
}
private void getDistrict(final String sid){
//Creating a string request
StringRequest dRequest = new StringRequest(Request.Method.POST,Config.DATA_District,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
JSONObject j = null;
try {
//Parsing the fetched Json String to JSON Object
Log.i("tagconvertstr", "[" + response + "]");
j = new JSONObject(response);
boolean error = j.getBoolean("error");
// Check for error node in json
if (!error) {
//Storing the Array of JSON String to our JSON Array
District = j.getJSONArray("District");
//Toast.makeText(MainActivity.this, District.toString(), Toast.LENGTH_SHORT).show();
district.removeAll(district);
for (int i = 0; i < District.length(); i++) {
try {
//Getting json object
JSONObject dist = District.getJSONObject(i);
//Adding the name of the district to array list
MainActivity.this.district.add(dist.getString("dname"));
} catch (JSONException e) {
e.printStackTrace();
}
}
//Setting adapter to show the items in the spinner
spinner2.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item, district));
}else {
String errorMsg = j.getString("error_msg");
Toast.makeText(MainActivity.this,
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this,error.toString(),Toast.LENGTH_LONG).show();
}
}){
#Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("state_id", sid);
return params;
}
};
//Creating a request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
//Adding request to the queue
requestQueue.add(dRequest);
}
}
Here is my Config.java file.. In this file i give the url for fetching spinner items..
public class Config {
//JSON URL
public static final String DATA_State = "http://10.0.3.2/cof/state.php";
public static final String DATA_District = "http://10.0.3.2/cof/district.php";
}
I want to display the details like this.. I want to view code,name and mobile number of the person when i choose the district and state from the spinner
I guess you are trying to communicate with a local database. Getting data from an eternal database requires 3 steps.
Creating your database - it can be local using services like wamp or it can be present on actual server.
Creating webservice - In this step you need to create a Webservice which interacts with your database and responds to your android code. It includes making of config. php file which stores your server & database information, then you have your actual anyname.php file which include config.php file, the code to get the data from database and to respond back to android app.
Calling webservice from android - In this step you actually call the webservice from your code to retrieve data from it.
Now as we can see from your provided code. You might have completed most or all of these steps. According to me you have your database ready. You have shown the config folder with two php files which shows that you have your php files ready.
Now to debug, first try to open the links in your browser and see if you get any result. If you get the information correctly then it means that you have placed the files correctly. Now try to print the result of volley in logcat to see if you have the data in your app. If everything works fine then you only have to handle spinner listener. If any of these steps fail, tell us about it.
First you have to retrieve all the data then adding them to an array list so you could get the info again,
You can look at that example it does what you want exactly ,
private void retrieveJSON() {
StringRequest stringRequest = new StringRequest(
Request.Method.GET,
URLstring,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("strrrrr", ">>" + response);
try {
JSONObject obj = new JSONObject(response);
goodModelArrayList = new ArrayList<>();
JSONArray dataArray = obj.getJSONArray("data");
for (int i = 0; i < dataArray.length(); i++) {
PMenus playerModel = new PMenus();
JSONObject dataobj = dataArray.getJSONObject(i);
playerModel.setName(dataobj.getString("name"));
playerModel.setCountry(dataobj.getString("country"));
playerModel.setCity(dataobj.getString("city"));
playerModel.setImgURL(dataobj.getString("imgURL"));
goodModelArrayList.add(playerModel);
}
for (int i = 0; i < goodModelArrayList.size(); i++){
names.add(goodModelArrayList.get(i).getName().toString());
}
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(AddPatient.this, simple_spinner_item, names);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
PmSpinner.setAdapter(spinnerArrayAdapter);
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
//displaying the error in toast if occurrs
Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
// request queue
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
Now after adding the data into an array you can use this method
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String item = parent.getItemAtPosition(position).toString() ;
String city = goodModelArrayList.get(position).getCity().toString() ;
String country = goodModelArrayList.get(position).getCountry().toString() ;
testnotes.setText(item);
testno.setText(city);
testprice.setText(country);
}
and ofcourse don't forget to add this line in you onCreate
goodModelArrayList = new ArrayList<>();
and define it like that
private ArrayList<PMenus> goodModelArrayList;
What I'd like to accomplish is the String array names[] be what you see in the spinner, but I cannot seem to figure out how to do this. I have tried looking off of other similar questions, but everything I try results in a crash in my app, saying that it is unable to instantiate the activity. Below, I have included the onPostExecute, where I am generating the string array, and also my addListenerOnSpinnerSelection() method. Any guidance would be great.
protected void onPostExecute(JSONObject json) {
try {
// Get JSON Object
JSONObject runes = json.getJSONObject(encodedId);
// Get JSON Array node
JSONArray rune = runes.getJSONArray("pages");
// Loop through pages, page names stored in string array
String[] name = new String[rune.length()];
String curr;
ArrayList<String> runePageNames = new ArrayList<String>();
for(int i = 0; i < rune.length(); i++) {
JSONObject c = rune.getJSONObject(i);
name[i] = c.getString(TAG_NAME);
curr = c.getString(TAG_CURRENT);
if(curr.equals("true"))
name[i] = name[i] + " [Active]";
runePageNames.add(name[i]);
Log.i(".........", name[i]);
}
adapter = new ArrayAdapter(this,
android.R.layout.simple_spinner_dropdown_item,
runePageNames);
addListenerOnSpinnerSelection();
// Set TextView
textName.setText(name[0]);
} catch (JSONException e) {
e.printStackTrace();
}
public void addListenerOnSpinnerSelection() {
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
((TextView) adapterView.getChildAt(0)).setTextColor(Color.parseColor("#C49246"));
Toast.makeText(adapterView.getContext(),
"Page Selected: " + adapterView.getItemAtPosition(i).toString(),
Toast.LENGTH_SHORT).show();
page = adapterView.getItemAtPosition(i).toString();
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
}