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How to parse nested keys and values using JsonReader?

I am learning Java and I'm trying to make a Fortnite stat tracking app. I'm using the Fortnite tracker API and JsonReader to read the keys and values that get returned. This works fine but the problem is the stats like 'kills' etc are nested and I'm not sure how to read those.
Can I read nested keys and values using JsonReader?
I tried JSONObject but I'm not entirely sure I was using it correctly so I didn't get very far.
{ "accountId": "c48bb072-f321-4572-9069-1c551d074949", "platformId": 1, "platformName": "xbox", "platformNameLong": "Xbox", "epicUserHandle": "playername", "stats": {
"p2": {
"trnRating": {
"label": "TRN Rating",
"field": "TRNRating",
"category": "Rating",
"valueInt": 1,
"value": "1",
"rank": 852977,
"percentile": 100.0,
"displayValue": "1"
},
"score": {
"label": "Score",
"field": "Score",
"category": "General",
"valueInt": 236074,
"value": "236074",
"rank": 6535595,
"percentile": 3.0,
"displayValue": "236,074"
}
Above is a sample of the information that I pulled so that you can see the structure
public class MainActivity extends AppCompatActivity {
TextView tv;
TextView tv2;
TextView tv3;
Button submit;
EditText tbplatform;
EditText tbhandle;
String TAG = "TESTRUN";
String id = "";
InputStreamReader responseBodyReader;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = (TextView) findViewById(R.id.tvOne);
tv2 = (TextView) findViewById(R.id.tvTwo);
tv3 = (TextView) findViewById(R.id.tvThree);
submit = (Button) findViewById(R.id.btnSubmit);
tbplatform = (EditText) findViewById(R.id.tbPlatform);
tbhandle = (EditText) findViewById(R.id.tbHandle);
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final String platform = String.valueOf(tbplatform.getText());
final String username = String.valueOf(tbhandle.getText());
AsyncTask.execute(new Runnable() {
#Override
public void run() {
// All your networking logic
// should be here
// Create URL
URL githubEndpoint = null;
try {
githubEndpoint = new URL("https://api.fortnitetracker.com/v1/profile/" + platform+ "/" + username);
} catch (MalformedURLException e) {
e.printStackTrace();
}
// Create connection
HttpsURLConnection myConnection = null;
try {
myConnection =
(HttpsURLConnection) githubEndpoint.openConnection();
} catch (IOException e) {
e.printStackTrace();
}
myConnection.setRequestProperty("TRN-Api-Key", "API_KEY_HERE");
try {
if (myConnection.getResponseCode() == 200) {
InputStream responseBody = myConnection.getInputStream();
responseBodyReader =
new InputStreamReader(responseBody, "UTF-8");
JsonReader jsonReader = new JsonReader(responseBodyReader);
jsonReader.beginObject(); // Start processing the JSON object
while (jsonReader.hasNext()) { // Loop through all keys
final String key = jsonReader.nextName(); // Fetch the next key
//Log.v(TAG, key);
if (key.equals("epicUserHandle") || key.equals("platformName") || key.equals("accountId")) { // Check if desired key
// Fetch the value as a String
final String value = jsonReader.nextString();
if (key.equals("epicUserHandle")) {
Log.v(TAG, "Gamertag: " + value);
}
if (key.equals("platformName")) {
Log.v(TAG, "Console: " + value);
}
if (key.equals("stats")) {
Log.v(TAG, "Kills: " + value);
}
runOnUiThread(new Runnable() {
#Override
public void run() {
//stuff that updates ui
if(key.equals("epicUserHandle")) {
tv.setText("Username: " + value);
}
if(key.equals("platformName")) {
tv2.setText("Platform: " +value);
}
if(key.equals("accountId")) {
tv3.setText("Account ID: " +value);
}
}
});
//Log.v(TAG, "" +value);
// Do something with the value
// ...
//break; // Break out of the loop
} else {
jsonReader.skipValue(); // Skip values of other keys
}
}
jsonReader.close();
myConnection.disconnect();
} else {
// Error handling code goes here
}
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
});
}
}

I think this may help you
You Need To Create Some Classes As Given Below
class Score implements Serializable {
private String label;
private String field;
private String category;
private Integer valueInt;
private String value;
private Integer rank;
private Double percentile;
private String displayValue;
public Score() {
this("", "", "", 0, "", 0, 0.0, "");
}
public Score(String label, String field,
String category, Integer valueInt,
String value, Integer rank,
Double percentile, String displayValue) {
this.label = label;
this.field = field;
this.category = category;
this.valueInt = valueInt;
this.value = value;
this.rank = rank;
this.percentile = percentile;
this.displayValue = displayValue;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public String getField() {
return field;
}
public void setField(String field) {
this.field = field;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public Integer getValueInt() {
return valueInt;
}
public void setValueInt(Integer valueInt) {
this.valueInt = valueInt;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public Integer getRank() {
return rank;
}
public void setRank(Integer rank) {
this.rank = rank;
}
public Double getPercentile() {
return percentile;
}
public void setPercentile(Double percentile) {
this.percentile = percentile;
}
public String getDisplayValue() {
return displayValue;
}
public void setDisplayValue(String displayValue) {
this.displayValue = displayValue;
}
}
class TRNRating implements Serializable {
private String label;
private String field;
private String category;
private Integer valueInt;
private String value;
private Integer rank;
private Double percentile;
private String displayValue;
public TRNRating() {
this("", "", "", 0, "", 0, 0.0, "");
}
public TRNRating(String label, String field,
String category, Integer valueInt,
String value, Integer rank,
Double percentile, String displayValue) {
this.label = label;
this.field = field;
this.category = category;
this.valueInt = valueInt;
this.value = value;
this.rank = rank;
this.percentile = percentile;
this.displayValue = displayValue;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public String getField() {
return field;
}
public void setField(String field) {
this.field = field;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public Integer getValueInt() {
return valueInt;
}
public void setValueInt(Integer valueInt) {
this.valueInt = valueInt;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public Integer getRank() {
return rank;
}
public void setRank(Integer rank) {
this.rank = rank;
}
public Double getPercentile() {
return percentile;
}
public void setPercentile(Double percentile) {
this.percentile = percentile;
}
public String getDisplayValue() {
return displayValue;
}
public void setDisplayValue(String displayValue) {
this.displayValue = displayValue;
}
}
class P2 implements Serializable {
private TRNRating trnRating;
private Score score;
public P2() {
this(new TRNRating(), new Score());
}
public P2(TRNRating trnRating, Score score) {
this.trnRating = trnRating;
this.score = score;
}
public TRNRating getTrnRating() {
return trnRating;
}
public void setTrnRating(TRNRating trnRating) {
this.trnRating = trnRating;
}
public Score getScore() {
return score;
}
public void setScore(Score score) {
this.score = score;
}
}
class Stats implements Serializable {
private P2 p2;
public Stats() {
this(new P2());
}
public Stats(P2 p2) {
this.p2 = p2;
}
}
//You Need To Change Name Of This Class
class Response implements Serializable {
private String accountId;
private Integer platformId;
private String platformName;
private String platformNameLong;
private String epicUserHandle;
private Stats stats;
public Response() {
this("", 0, "", "", "", new Stats());
}
public Response(String accountId, Integer platformId,
String platformName, String platformNameLong,
String epicUserHandle, Stats stats) {
this.accountId = accountId;
this.platformId = platformId;
this.platformName = platformName;
this.platformNameLong = platformNameLong;
this.epicUserHandle = epicUserHandle;
this.stats = stats;
}
public String getAccountId() {
return accountId;
}
public void setAccountId(String accountId) {
this.accountId = accountId;
}
public Integer getPlatformId() {
return platformId;
}
public void setPlatformId(Integer platformId) {
this.platformId = platformId;
}
public String getPlatformName() {
return platformName;
}
public void setPlatformName(String platformName) {
this.platformName = platformName;
}
public String getPlatformNameLong() {
return platformNameLong;
}
public void setPlatformNameLong(String platformNameLong) {
this.platformNameLong = platformNameLong;
}
public String getEpicUserHandle() {
return epicUserHandle;
}
public void setEpicUserHandle(String epicUserHandle) {
this.epicUserHandle = epicUserHandle;
}
public Stats getStats() {
return stats;
}
public void setStats(Stats stats) {
this.stats = stats;
}
}
If your response is same as explained in question. Then this will work.
//In your code after status check you need to do like this
if (myConnection.getResopnseCode() == 200) {
BufferedReader br=new BufferedReader(responseBodyReader);
String read = null, entireResponse = "";
StringBuffer sb = new StringBuffer();
while((read = br.readLine()) != null) {
sb.append(read);
}
entireResponse = sb.toString();
//You need to change name of response class
Response response = new Gson().fromJson(entireResponse , Response.class);
}

Retrofit response success but null result

Interface:
public interface BabService {
#GET("bab.php")
Call<Respon> tampil(#Query("imam") String imam);
}
Respon:
public class Respon {
private String value;
private List<BabResult> resultBab;
public String getValue() {
return value;
}
public List<BabResult> getResultBab() { return resultBab; }
}
Result:
public class BabResult {
private String id_bab;
private String id_kitab;
private String bab;
public String getId_bab() { return id_bab; }
public String getId_kitab() {
return id_kitab;
}
public String getBab() {
return bab;
}
}
Adapter:
public class BabAdapter extends RecyclerView.Adapter<BabAdapter.ViewHolder>
{
private Context context;
private List<BabResult> results;
private String idBab, judulBab;
private int no;
public BabAdapter(Context context, List<BabResult> results) {
this.context = context;
this.results = results;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_bab, parent, false);
ViewHolder holder = new ViewHolder(v);
return holder;
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
if(position % 2 != 0){
holder.vBab.setBackgroundResource(R.color.ijo);
}else{
holder.vBab.setBackgroundResource(R.color.oren);
}
no = position + 1;
BabResult result = results.get(position);
idBab = result.getId_bab();
judulBab = result.getBab();
holder.tvNo.setText(no);
holder.tvBab.setText(judulBab);
}
#Override
public int getItemCount() {
if(results == null){
return 4;
}
return results.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private View vBab;
private TextView tvBab, tvNo;
public ViewHolder(View itemView) {
super(itemView);
vBab = (View) itemView.findViewById(R.id.v_bab);
tvNo = (TextView) itemView.findViewById(R.id.tv_no);
tvBab = (TextView) itemView.findViewById(R.id.tv_bab);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent(context, HadisList.class);
i.putExtra("id", idBab);
i.putExtra("bab", judulBab);
i.putExtra("no", no);
context.startActivity(i);
}
});
}
}
}
Activity:
public class MenuBab extends AppCompatActivity {
public static final String URL = "http://mi3bpolinema.000webhostapp.com/";
private List<BabResult> results = new ArrayList<>();
private BabAdapter babAdapter;
private ProgressBar pbLoading;
private RecyclerView rvBab;
private TextView tvImam;
private String imam, namaImam;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu_bab);
if(getSupportActionBar() != null){
getSupportActionBar().hide();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
Intent intent = getIntent();
if(intent != null){
if(intent.getStringExtra("imam") != null){
imam = intent.getStringExtra("imam");
namaImam = intent.getStringExtra("nama");
}
}
pbLoading = (ProgressBar) findViewById(R.id.pb_loading);
rvBab = (RecyclerView) findViewById(R.id.rv_bab);
tvImam = (TextView) findViewById(R.id.tv_imam);
tvImam.setText(namaImam);
babAdapter = new BabAdapter(this, results);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
rvBab.setLayoutManager(mLayoutManager);
rvBab.setItemAnimator(new DefaultItemAnimator());
rvBab.setAdapter(babAdapter);
loadDataBab();
}
#Override
protected void onResume() {
super.onResume();
loadDataBab();
}
private void loadDataBab() {
Retrofit retrofit = new Retrofit
.Builder()
.baseUrl(URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
BabService api = retrofit.create(BabService.class);
Call<Respon> call = api.tampil(imam);
call.enqueue(new Callback<Respon>() {
#Override
public void onResponse(Call<Respon> call, Response<Respon> response) {
String value = response.body().getValue();
pbLoading.setVisibility(View.GONE);
if (value.equals("1")) {
results = response.body().getResultBab();
babAdapter = new BabAdapter(MenuBab.this, results);
rvBab.setAdapter(babAdapter);
}
}
#Override
public void onFailure(Call<Respon> call, Throwable t) {
}
});
}
}
On retrofit get result null, but when I run in website get result like this:
{"value":1,"result":[{"id_bab":"4","id_kitab":"1","bab":"Wudhu"},
{"id_bab":"8","id_kitab":"1","bab":"Shalat"},
{"id_bab":"15","id_kitab":"1","bab":"Puasa"}]}
using this link.

You need to use Model class in this way
now you can get API Result
Response Model Class
import com.google.gson.annotations.SerializedName;
import java.io.Serializable;
import java.util.ArrayList;
public class Response implements Serializable{
#SerializedName("value")
private String value;
#SerializedName("result")
private ArrayList<BabResult> resultBab;
public String getValue() {
return value;
}
public ArrayList<BabResult> getResultBab() {
return resultBab;
}
public void setValue(String value) {
this.value = value;
}
public void setResultBab(ArrayList<BabResult> resultBab) {
this.resultBab = resultBab;
}
public class BabResult {
#SerializedName("id_bab")
private String id_bab;
#SerializedName("id_kitab")
private String id_kitab;
#SerializedName("bab")
private String bab;
public String getId_bab() {
return id_bab;
}
public void setId_bab(String id_bab) {
this.id_bab = id_bab;
}
public String getId_kitab() {
return id_kitab;
}
public void setId_kitab(String id_kitab) {
this.id_kitab = id_kitab;
}
public String getBab() {
return bab;
}
public void setBab(String bab) {
this.bab = bab;
}
}
}

Respon class
public class Respon
{
private ArrayList<Result> result;
private String value;
public ArrayList<Result> getResult ()
{
return result;
}
public void setResult ( ArrayList<Result> result)
{
this.result = result;
}
public String getValue ()
{
return value;
}
public void setValue (String value)
{
this.value = value;
}
#Override
public String toString()
{
return "ClassPojo [result = "+result+", value = "+value+"]";
}
public class Result
{
private String id_kitab;
private String bab;
private String id_bab;
public String getId_kitab ()
{
return id_kitab;
}
public void setId_kitab (String id_kitab)
{
this.id_kitab = id_kitab;
}
public String getBab ()
{
return bab;
}
public void setBab (String bab)
{
this.bab = bab;
}
public String getId_bab ()
{
return id_bab;
}
public void setId_bab (String id_bab)
{
this.id_bab = id_bab;
}
#Override
public String toString()
{
return "ClassPojo [id_kitab = "+id_kitab+", bab = "+bab+", id_bab =
"+id_bab+"]";
}
}
}
Check this way data null or not and add arraylist
private void loadDataBab() {
Retrofit retrofit = new Retrofit
.Builder()
.baseUrl(URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
BabService api = retrofit.create(BabService.class);
Call<Respon> call = api.tampil(imam);
call.enqueue(new Callback<Respon>() {
#Override
public void onResponse(Call<Respon> call, Response<Respon> response) {
if (response.isSuccessful())
if (response.body() != null)
pbLoading.setVisibility(View.GONE);
if (response.body().getValue().equalsIgnoreCase("1")) {
results.addAll(response.body().getResult());
babAdapter = new BabAdapter(MenuBab.this, results);
rvBab.setAdapter(babAdapter);
}
}
#Override
public void onFailure(Call<Respon> call, Throwable t) {
}
});
}

Pass the array in your Respon class like this ..
public class Respon {
private String value;
private BabResult [] result;
public String getValue() {
return value;
}
public BabResult [] getResultBab() { return result; }
}
and in your loadDataBab method ..
private List<BabResult> results = new ArrayList<>();
private void loadDataBab() {
Retrofit retrofit = new Retrofit
.Builder()
.baseUrl(URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
RequestInterface api = retrofit.create(RequestInterface.class);
Call<Respon> call = api.tampil("1");
call.enqueue(new Callback<Respon>() {
#Override
public void onResponse(Call<Respon> call, Response<Respon> response) {
String value = response.body().getValue();
if (value.equals("1")) {
results = new ArrayList<>(Arrays.asList(response.body().getResultBab()));
}
}
#Override
public void onFailure(Call<Respon> call, Throwable t) {
}
});
}

I change Respon to :
public class Respon {
private String value;
private List<BabResult> result;
public String getValue() { return value; }
public List<BabResult> getResult() { return result; }
}
and it works. Thx :))

Illegal Self Reference

I am writing an android app that uses a bundle to pass data between activities. I made an Answers.java class to get the data from the bundle. When I try to get the data I receive an error Illegal Self-Reference. I get the error on
Answers a = a.getQuestion1_1();
Here is my activity code
package www.iup.edu.iupcrimsurvey;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Thank_You_MainActivity extends AppCompatActivity {
Answers a = a.getQuestion1_1();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_thank__you__main);
// Sets an onClickListener to the button and calls the launchNextScreenActivity() method
final Button btn = (Button) findViewById(R.id.Next_Screen15);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
launchNextScreenActivity();
}
});
// Sets an onClickListener to the button and calls the launchNextScreenActivity() method
final Button btn2 = (Button) findViewById(R.id.Close);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
launchFinishActivity();
}
});
}
// Switches to the StartScreen_Activity screen
private void launchNextScreenActivity() {
Intent intent = new Intent(this, StartScreen_MainActivity.class);
startActivity(intent);
}
// Closes the app
private void launchFinishActivity() {
}
}
My Answers.java file
package www.iup.edu.iupcrimsurvey;
public class Answers {
private int question1_1 = StartScreen_MainActivity.MyAppsBundle.getInt("Demographics_question1");
private String question1_2 = StartScreen_MainActivity.MyAppsBundle.getString("Demographics_question2");
private String question1_3 = StartScreen_MainActivity.MyAppsBundle.getString("Demographics_question3");
private String question1_4 = StartScreen_MainActivity.MyAppsBundle.getString("Demographics_question4");
private String question1_5 = StartScreen_MainActivity.MyAppsBundle.getString("Demographics_question5");
private String question1_6 = StartScreen_MainActivity.MyAppsBundle.getString("Demographics_question6");
private String question1_7= StartScreen_MainActivity.MyAppsBundle.getString("Demographics_question7");
private String question2_1 = StartScreen_MainActivity.MyAppsBundle.getString("housing_question1");
private int question2_2 = StartScreen_MainActivity.MyAppsBundle.getInt("housing_question2");
private String question2_3 = StartScreen_MainActivity.MyAppsBundle.getString("housing_question3");
private String question2_4 = StartScreen_MainActivity.MyAppsBundle.getString("housing_question4");
private String question3_1 = StartScreen_MainActivity.MyAppsBundle.getString("Sexuality_question1");
private String question3_2 = StartScreen_MainActivity.MyAppsBundle.getString("Sexuality_question2");
private String question3_3 = StartScreen_MainActivity.MyAppsBundle.getString("Sexuality_question3");
private String question3_4 = StartScreen_MainActivity.MyAppsBundle.getString("Sexuality_question4");
private String question3_5 = StartScreen_MainActivity.MyAppsBundle.getString("Sexuality_question5");
private String question4_1 = StartScreen_MainActivity.MyAppsBundle.getString("Alcohol_question1");
private String question4_2 = StartScreen_MainActivity.MyAppsBundle.getString("Alcohol_question2");
private String question4_3 = StartScreen_MainActivity.MyAppsBundle.getString("Alcohol_question3");
private String question4_4 = StartScreen_MainActivity.MyAppsBundle.getString("Alcohol_question4");
private String question4_5 = StartScreen_MainActivity.MyAppsBundle.getString("Alcohol_question5");
private String question5_1 = StartScreen_MainActivity.MyAppsBundle.getString("Travel_question1");
private String question5_2 = StartScreen_MainActivity.MyAppsBundle.getString("Travel_question2");
private String question5_3 = StartScreen_MainActivity.MyAppsBundle.getString("Travel_question3");
private String question5_4 = StartScreen_MainActivity.MyAppsBundle.getString("Travel_question4");
private String question5_5 = StartScreen_MainActivity.MyAppsBundle.getString("Travel_question5");
private String question6_1 = StartScreen_MainActivity.MyAppsBundle.getString("Work_question1");
private String question6_2 = StartScreen_MainActivity.MyAppsBundle.getString("Work_question2");
private String question6_3 = StartScreen_MainActivity.MyAppsBundle.getString("Work_question3");
private String question6_4 = StartScreen_MainActivity.MyAppsBundle.getString("Work_question4");
private String question6_5 = StartScreen_MainActivity.MyAppsBundle.getString("Work_question5");
private String question7_1 = StartScreen_MainActivity.MyAppsBundle.getString("Crime_question1");
private String question8_1 = StartScreen_MainActivity.MyAppsBundle.getString("Crime_Committed_question1");
private String question8_2 = StartScreen_MainActivity.MyAppsBundle.getString("Crime_Committed_question2");
private String question10_1 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question1");
private String question10_2 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question2");
private String question10_3 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question3");
private String question10_4 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question4");
private String question10_5 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question5");
private String question10_6 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question6");
private String question10_7 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question7");
private String question10_8 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question8");
private String question10_9 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question9");
private String question10_10 = StartScreen_MainActivity.MyAppsBundle.getString("Incident_question10");
public int getQuestion1_1() {
return question1_1;
}
public void setQuestion1_1(int question1_1) {
this.question1_1 = question1_1;
}
public String getQuestion1_2() {
return question1_2;
}
public void setQuestion1_2(String question1_2) {
this.question1_2 = question1_2;
}
public String getQuestion1_3() {
return question1_3;
}
public void setQuestion1_3(String question1_3) {
this.question1_3 = question1_3;
}
public String getQuestion1_4() {
return question1_4;
}
public void setQuestion1_4(String question1_4) {
this.question1_4 = question1_4;
}
public String getQuestion1_5() {
return question1_5;
}
public void setQuestion1_5(String question1_5) {
this.question1_5 = question1_5;
}
public String getQuestion1_6() {
return question1_6;
}
public void setQuestion1_6(String question1_6) {
this.question1_6 = question1_6;
}
public String getQuestion1_7() {
return question1_7;
}
public void setQuestion1_7(String question1_7) {
this.question1_7 = question1_7;
}
public String getQuestion2_1() {
return question2_1;
}
public void setQuestion2_1(String question2_1) {
this.question2_1 = question2_1;
}
public int getQuestion2_2() {
return question2_2;
}
public void setQuestion2_2(int question2_2) {
this.question2_2 = question2_2;
}
public String getQuestion2_3() {
return question2_3;
}
public void setQuestion2_3(String question2_3) {
this.question2_3 = question2_3;
}
public String getQuestion2_4() {
return question2_4;
}
public void setQuestion2_4(String question2_4) {
this.question2_4 = question2_4;
}
public String getQuestion3_1() {
return question3_1;
}
public void setQuestion3_1(String question3_1) {
this.question3_1 = question3_1;
}
public String getQuestion3_2() {
return question3_2;
}
public void setQuestion3_2(String question3_2) {
this.question3_2 = question3_2;
}
public String getQuestion3_3() {
return question3_3;
}
public void setQuestion3_3(String question3_3) {
this.question3_3 = question3_3;
}
public String getQuestion3_4() {
return question3_4;
}
public void setQuestion3_4(String question3_4) {
this.question3_4 = question3_4;
}
public String getQuestion3_5() {
return question3_5;
}
public void setQuestion3_5(String question3_5) {
this.question3_5 = question3_5;
}
public String getQuestion4_1() {
return question4_1;
}
public void setQuestion4_1(String question4_1) {
this.question4_1 = question4_1;
}
public String getQuestion4_2() {
return question4_2;
}
public void setQuestion4_2(String question4_2) {
this.question4_2 = question4_2;
}
public String getQuestion4_3() {
return question4_3;
}
public void setQuestion4_3(String question4_3) {
this.question4_3 = question4_3;
}
public String getQuestion4_4() {
return question4_4;
}
public void setQuestion4_4(String question4_4) {
this.question4_4 = question4_4;
}
public String getQuestion4_5() {
return question4_5;
}
public void setQuestion4_5(String question4_5) {
this.question4_5 = question4_5;
}
public String getQuestion5_1() {
return question5_1;
}
public void setQuestion5_1(String question5_1) {
this.question5_1 = question5_1;
}
public String getQuestion5_2() {
return question5_2;
}
public void setQuestion5_2(String question5_2) {
this.question5_2 = question5_2;
}
public String getQuestion5_3() {
return question5_3;
}
public void setQuestion5_3(String question5_3) {
this.question5_3 = question5_3;
}
public String getQuestion5_4() {
return question5_4;
}
public void setQuestion5_4(String question5_4) {
this.question5_4 = question5_4;
}
public String getQuestion5_5() {
return question5_5;
}
public void setQuestion5_5(String question5_5) {
this.question5_5 = question5_5;
}
public String getQuestion6_1() {
return question6_1;
}
public void setQuestion6_1(String question6_1) {
this.question6_1 = question6_1;
}
public String getQuestion6_2() {
return question6_2;
}
public void setQuestion6_2(String question6_2) {
this.question6_2 = question6_2;
}
public String getQuestion6_3() {
return question6_3;
}
public void setQuestion6_3(String question6_3) {
this.question6_3 = question6_3;
}
public String getQuestion6_4() {
return question6_4;
}
public void setQuestion6_4(String question6_4) {
this.question6_4 = question6_4;
}
public String getQuestion6_5() {
return question6_5;
}
public void setQuestion6_5(String question6_5) {
this.question6_5 = question6_5;
}
public String getQuestion7_1() {
return question7_1;
}
public void setQuestion7_1(String question7_1) {
this.question7_1 = question7_1;
}
public String getQuestion8_1() {
return question8_1;
}
public void setQuestion8_1(String question8_1) {
this.question8_1 = question8_1;
}
public String getQuestion8_2() {
return question8_2;
}
public void setQuestion8_2(String question8_2) {
this.question8_2 = question8_2;
}
public String getQuestion10_1() {
return question10_1;
}
public void setQuestion10_1(String question10_1) {
this.question10_1 = question10_1;
}
public String getQuestion10_2() {
return question10_2;
}
public void setQuestion10_2(String question10_2) {
this.question10_2 = question10_2;
}
public String getQuestion10_3() {
return question10_3;
}
public void setQuestion10_3(String question10_3) {
this.question10_3 = question10_3;
}
public String getQuestion10_4() {
return question10_4;
}
public void setQuestion10_4(String question10_4) {
this.question10_4 = question10_4;
}
public String getQuestion10_5() {
return question10_5;
}
public void setQuestion10_5(String question10_5) {
this.question10_5 = question10_5;
}
public String getQuestion10_6() {
return question10_6;
}
public void setQuestion10_6(String question10_6) {
this.question10_6 = question10_6;
}
public String getQuestion10_7() {
return question10_7;
}
public void setQuestion10_7(String question10_7) {
this.question10_7 = question10_7;
}
public String getQuestion10_8() {
return question10_8;
}
public void setQuestion10_8(String question10_8) {
this.question10_8 = question10_8;
}
public String getQuestion10_9() {
return question10_9;
}
public void setQuestion10_9(String question10_9) {
this.question10_9 = question10_9;
}
public String getQuestion10_10() {
return question10_10;
}
public void setQuestion10_10(String question10_10) {
this.question10_10 = question10_10;
}
public String getQuestion11_1() {
return question11_1;
}
public void setQuestion11_1(String question11_1) {
this.question11_1 = question11_1;
}
public String getQuestion11_2() {
return question11_2;
}
public void setQuestion11_2(String question11_2) {
this.question11_2 = question11_2;
}
public String getQuestion11_3() {
return question11_3;
}
public void setQuestion11_3(String question11_3) {
this.question11_3 = question11_3;
}
public String getQuestion11_4() {
return question11_4;
}
public void setQuestion11_4(String question11_4) {
this.question11_4 = question11_4;
}
public String getQuestion11_5() {
return question11_5;
}
public void setQuestion11_5(String question11_5) {
this.question11_5 = question11_5;
}
public String getQuestion11_6() {
return question11_6;
}
public void setQuestion11_6(String question11_6) {
this.question11_6 = question11_6;
}
public String getQuestion11_7() {
return question11_7;
}
public void setQuestion11_7(String question11_7) {
this.question11_7 = question11_7;
}
public String getQuestion11_8() {
return question11_8;
}
public void setQuestion11_8(String question11_8) {
this.question11_8 = question11_8;
}
public String getQuestion11_9() {
return question11_9;
}
public void setQuestion11_9(String question11_9) {
this.question11_9 = question11_9;
}
public String getQuestion11_10() {
return question11_10;
}
public void setQuestion11_10(String question11_10) {
this.question11_10 = question11_10;
}
private String question11_1 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question1");
private String question11_2 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question2");
private String question11_3 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question3");
private String question11_4 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question4");
private String question11_5 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question5");
private String question11_6 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question6");
private String question11_7 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question7");
private String question11_8 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question8");
private String question11_9 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question9");
private String question11_10 = StartScreen_MainActivity.MyAppsBundle.getString("Relationship_question10");
}

The way you are trying to call is wrong.
Please follow this:
Create the Object of the Answer class
> public class Thank_You_MainActivity extends AppCompatActivity {
Answer a;//Create an object
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_thank__you__main);
a = new Ans();//define it
String aa = a.getGetQuestion1_1(); then use it anywhere
Hope this will help you

Getting data from JSON in android mobile gives fatalexception main

Please i need help , i am new to android so i need help . i need to receive data from JSON and i watched a loot of tutorials and i cant find my answer . I need to receive data from JSON link . once i do it i get a loot of errors and also the compilator gives me a lot of errors . Here is my code :
my custom adapter called CustomItemAdapter.java
package com.example.madrit.okhttp_gson_view;
import android.content.Context;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
public class CustomItemAdapter extends ArrayAdapter <model_item> {
public CustomItemAdapter(Context context , List<model_item> mymodel)
{
super(context , 0 , mymodel);
}
#Nullable
#Override
public model_item getItem(int position) {
return super.getItem(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
model_item model = getItem(position);
if (convertView==null){
convertView = LayoutInflater.from(getContext()).inflate(R.layout.item_shop_list, parent, false);
}
TextView title = (TextView) convertView.findViewById(R.id.item_onthelist_title);
TextView price = (TextView) convertView.findViewById(R.id.item_onthelist_price);
TextView description = (TextView) convertView.findViewById(R.id.item_onthelist_description);
title.setText(model.getName());
price.setText(Double.toString(model.getPrice()));
description.setText(model.getMeta_description());
return convertView;
}
}
my model item model_item.java
package com.example.madrit.okhttp_gson_view;
import com.google.gson.annotations.SerializedName;
import java.util.List;
import com.google.gson.annotations.SerializedName;
import java.util.List;
public class model_item {
private String id_product;
private String id_supplier;
private String id_manufacturer;
private String id_category_default;
private String id_shop_default;
private String id_tax_rules_group;
private String on_sale;
private String online_only;
private String ean13;
private String upc;
private String ecotax;
private int quantity;
private String minimal_quantity;
private double price;
private String wholesale_price;
private String unity;
private String unit_price_ratio;
private String additional_shipping_cost;
private String reference;
private String supplier_reference;
private String location;
private String width;
private String height;
private String depth;
private String weight;
private String out_of_stock;
private String quantity_discount;
private String customizable;
private String uploadable_files;
private String text_fields;
private String active;
private String redirect_type;
private String id_product_redirected;
private String available_for_order;
private String available_date;
private String condition;
private String show_price;
private String indexed;
private String visibility;
private String cache_is_pack;
private String cache_has_attachments;
private String is_virtual;
private String cache_default_attribute;
private String date_add;
private String date_upd;
private String advanced_stock_management;
private String pack_stock_type;
private String id_shop;
private int id_product_attribute;
private String product_attribute_minimal_quantity;
private String description;
private String description_short;
private String available_now;
private String available_later;
private String link_rewrite;
private String meta_description;
private String meta_keywords;
private String meta_title;
private String name;
private String id_image;
private String legend;
private String manufacturer_name;
private String category_default;
#SerializedName("new")
private String newX;
private String orderprice;
private int allow_oosp;
private String category;
private String link;
private int attribute_price;
private double price_tax_exc;
private double price_without_reduction;
private int reduction;
private boolean specific_prices;
private int quantity_all_versions;
private int virtual;
private int pack;
private int nopackprice;
private boolean customization_required;
private int rate;
private String tax_name;
private String image_url;
private List<?> features;
private List<?> attachments;
private List<?> packItems;
public String getId_product() {
return id_product;
}
public void setId_product(String id_product) {
this.id_product = id_product;
}
public String getId_supplier() {
return id_supplier;
}
public void setId_supplier(String id_supplier) {
this.id_supplier = id_supplier;
}
public String getId_manufacturer() {
return id_manufacturer;
}
public void setId_manufacturer(String id_manufacturer) {
this.id_manufacturer = id_manufacturer;
}
public String getId_category_default() {
return id_category_default;
}
public void setId_category_default(String id_category_default) {
this.id_category_default = id_category_default;
}
public String getId_shop_default() {
return id_shop_default;
}
public void setId_shop_default(String id_shop_default) {
this.id_shop_default = id_shop_default;
}
public String getId_tax_rules_group() {
return id_tax_rules_group;
}
public void setId_tax_rules_group(String id_tax_rules_group) {
this.id_tax_rules_group = id_tax_rules_group;
}
public String getOn_sale() {
return on_sale;
}
public void setOn_sale(String on_sale) {
this.on_sale = on_sale;
}
public String getOnline_only() {
return online_only;
}
public void setOnline_only(String online_only) {
this.online_only = online_only;
}
public String getEan13() {
return ean13;
}
public void setEan13(String ean13) {
this.ean13 = ean13;
}
public String getUpc() {
return upc;
}
public void setUpc(String upc) {
this.upc = upc;
}
public String getEcotax() {
return ecotax;
}
public void setEcotax(String ecotax) {
this.ecotax = ecotax;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public String getMinimal_quantity() {
return minimal_quantity;
}
public void setMinimal_quantity(String minimal_quantity) {
this.minimal_quantity = minimal_quantity;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public String getWholesale_price() {
return wholesale_price;
}
public void setWholesale_price(String wholesale_price) {
this.wholesale_price = wholesale_price;
}
public String getUnity() {
return unity;
}
public void setUnity(String unity) {
this.unity = unity;
}
public String getUnit_price_ratio() {
return unit_price_ratio;
}
public void setUnit_price_ratio(String unit_price_ratio) {
this.unit_price_ratio = unit_price_ratio;
}
public String getAdditional_shipping_cost() {
return additional_shipping_cost;
}
public void setAdditional_shipping_cost(String additional_shipping_cost) {
this.additional_shipping_cost = additional_shipping_cost;
}
public String getReference() {
return reference;
}
public void setReference(String reference) {
this.reference = reference;
}
public String getSupplier_reference() {
return supplier_reference;
}
public void setSupplier_reference(String supplier_reference) {
this.supplier_reference = supplier_reference;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public String getWidth() {
return width;
}
public void setWidth(String width) {
this.width = width;
}
public String getHeight() {
return height;
}
public void setHeight(String height) {
this.height = height;
}
public String getDepth() {
return depth;
}
public void setDepth(String depth) {
this.depth = depth;
}
public String getWeight() {
return weight;
}
public void setWeight(String weight) {
this.weight = weight;
}
public String getOut_of_stock() {
return out_of_stock;
}
public void setOut_of_stock(String out_of_stock) {
this.out_of_stock = out_of_stock;
}
public String getQuantity_discount() {
return quantity_discount;
}
public void setQuantity_discount(String quantity_discount) {
this.quantity_discount = quantity_discount;
}
public String getCustomizable() {
return customizable;
}
public void setCustomizable(String customizable) {
this.customizable = customizable;
}
public String getUploadable_files() {
return uploadable_files;
}
public void setUploadable_files(String uploadable_files) {
this.uploadable_files = uploadable_files;
}
public String getText_fields() {
return text_fields;
}
public void setText_fields(String text_fields) {
this.text_fields = text_fields;
}
public String getActive() {
return active;
}
public void setActive(String active) {
this.active = active;
}
public String getRedirect_type() {
return redirect_type;
}
public void setRedirect_type(String redirect_type) {
this.redirect_type = redirect_type;
}
public String getId_product_redirected() {
return id_product_redirected;
}
public void setId_product_redirected(String id_product_redirected) {
this.id_product_redirected = id_product_redirected;
}
public String getAvailable_for_order() {
return available_for_order;
}
public void setAvailable_for_order(String available_for_order) {
this.available_for_order = available_for_order;
}
public String getAvailable_date() {
return available_date;
}
public void setAvailable_date(String available_date) {
this.available_date = available_date;
}
public String getCondition() {
return condition;
}
public void setCondition(String condition) {
this.condition = condition;
}
public String getShow_price() {
return show_price;
}
public void setShow_price(String show_price) {
this.show_price = show_price;
}
public String getIndexed() {
return indexed;
}
public void setIndexed(String indexed) {
this.indexed = indexed;
}
public String getVisibility() {
return visibility;
}
public void setVisibility(String visibility) {
this.visibility = visibility;
}
public String getCache_is_pack() {
return cache_is_pack;
}
public void setCache_is_pack(String cache_is_pack) {
this.cache_is_pack = cache_is_pack;
}
public String getCache_has_attachments() {
return cache_has_attachments;
}
public void setCache_has_attachments(String cache_has_attachments) {
this.cache_has_attachments = cache_has_attachments;
}
public String getIs_virtual() {
return is_virtual;
}
public void setIs_virtual(String is_virtual) {
this.is_virtual = is_virtual;
}
public String getCache_default_attribute() {
return cache_default_attribute;
}
public void setCache_default_attribute(String cache_default_attribute) {
this.cache_default_attribute = cache_default_attribute;
}
public String getDate_add() {
return date_add;
}
public void setDate_add(String date_add) {
this.date_add = date_add;
}
public String getDate_upd() {
return date_upd;
}
public void setDate_upd(String date_upd) {
this.date_upd = date_upd;
}
public String getAdvanced_stock_management() {
return advanced_stock_management;
}
public void setAdvanced_stock_management(String advanced_stock_management) {
this.advanced_stock_management = advanced_stock_management;
}
public String getPack_stock_type() {
return pack_stock_type;
}
public void setPack_stock_type(String pack_stock_type) {
this.pack_stock_type = pack_stock_type;
}
public String getId_shop() {
return id_shop;
}
public void setId_shop(String id_shop) {
this.id_shop = id_shop;
}
public int getId_product_attribute() {
return id_product_attribute;
}
public void setId_product_attribute(int id_product_attribute) {
this.id_product_attribute = id_product_attribute;
}
public String getProduct_attribute_minimal_quantity() {
return product_attribute_minimal_quantity;
}
public void setProduct_attribute_minimal_quantity(String product_attribute_minimal_quantity) {
this.product_attribute_minimal_quantity = product_attribute_minimal_quantity;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDescription_short() {
return description_short;
}
public void setDescription_short(String description_short) {
this.description_short = description_short;
}
public String getAvailable_now() {
return available_now;
}
public void setAvailable_now(String available_now) {
this.available_now = available_now;
}
public String getAvailable_later() {
return available_later;
}
public void setAvailable_later(String available_later) {
this.available_later = available_later;
}
public String getLink_rewrite() {
return link_rewrite;
}
public void setLink_rewrite(String link_rewrite) {
this.link_rewrite = link_rewrite;
}
public String getMeta_description() {
return meta_description;
}
public void setMeta_description(String meta_description) {
this.meta_description = meta_description;
}
public String getMeta_keywords() {
return meta_keywords;
}
public void setMeta_keywords(String meta_keywords) {
this.meta_keywords = meta_keywords;
}
public String getMeta_title() {
return meta_title;
}
public void setMeta_title(String meta_title) {
this.meta_title = meta_title;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getId_image() {
return id_image;
}
public void setId_image(String id_image) {
this.id_image = id_image;
}
public String getLegend() {
return legend;
}
public void setLegend(String legend) {
this.legend = legend;
}
public String getManufacturer_name() {
return manufacturer_name;
}
public void setManufacturer_name(String manufacturer_name) {
this.manufacturer_name = manufacturer_name;
}
public String getCategory_default() {
return category_default;
}
public void setCategory_default(String category_default) {
this.category_default = category_default;
}
public String getNewX() {
return newX;
}
public void setNewX(String newX) {
this.newX = newX;
}
public String getOrderprice() {
return orderprice;
}
public void setOrderprice(String orderprice) {
this.orderprice = orderprice;
}
public int getAllow_oosp() {
return allow_oosp;
}
public void setAllow_oosp(int allow_oosp) {
this.allow_oosp = allow_oosp;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public int getAttribute_price() {
return attribute_price;
}
public void setAttribute_price(int attribute_price) {
this.attribute_price = attribute_price;
}
public double getPrice_tax_exc() {
return price_tax_exc;
}
public void setPrice_tax_exc(double price_tax_exc) {
this.price_tax_exc = price_tax_exc;
}
public double getPrice_without_reduction() {
return price_without_reduction;
}
public void setPrice_without_reduction(double price_without_reduction) {
this.price_without_reduction = price_without_reduction;
}
public int getReduction() {
return reduction;
}
public void setReduction(int reduction) {
this.reduction = reduction;
}
public boolean isSpecific_prices() {
return specific_prices;
}
public void setSpecific_prices(boolean specific_prices) {
this.specific_prices = specific_prices;
}
public int getQuantity_all_versions() {
return quantity_all_versions;
}
public void setQuantity_all_versions(int quantity_all_versions) {
this.quantity_all_versions = quantity_all_versions;
}
public int getVirtual() {
return virtual;
}
public void setVirtual(int virtual) {
this.virtual = virtual;
}
public int getPack() {
return pack;
}
public void setPack(int pack) {
this.pack = pack;
}
public int getNopackprice() {
return nopackprice;
}
public void setNopackprice(int nopackprice) {
this.nopackprice = nopackprice;
}
public boolean isCustomization_required() {
return customization_required;
}
public void setCustomization_required(boolean customization_required) {
this.customization_required = customization_required;
}
public int getRate() {
return rate;
}
public void setRate(int rate) {
this.rate = rate;
}
public String getTax_name() {
return tax_name;
}
public void setTax_name(String tax_name) {
this.tax_name = tax_name;
}
public String getImage_url() {
return image_url;
}
public void setImage_url(String image_url) {
this.image_url = image_url;
}
public List<?> getFeatures() {
return features;
}
public void setFeatures(List<?> features) {
this.features = features;
}
public List<?> getAttachments() {
return attachments;
}
public void setAttachments(List<?> attachments) {
this.attachments = attachments;
}
public List<?> getPackItems() {
return packItems;
}
public void setPackItems(List<?> packItems) {
this.packItems = packItems;
}
}
list_main_item.java ( the main activity ) :
package com.example.madrit.okhttp_gson_view;
import android.os.Handler;
import android.os.Looper;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ListAdapter;
import android.widget.ListView;
import com.google.gson.Gson;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class list_main_item extends AppCompatActivity {
private ListView listview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
listview = (ListView) findViewById(R.id.item_shop_list_view);
String url = "http://77.242.25.43:8080/girogama/modules/api/mApi/v1/categories.php?action=get_products&id_category=6&page=1&products_per_page=15";
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder().url(url).build();
client.newCall(request).enqueue(new Callback() {
#Override
public void onFailure(Call call, IOException e) {
}
#Override
public void onResponse(Call call, Response response) throws IOException {
String json = response.body().string();
Gson gson = new Gson();
model_item[] model = gson.fromJson(json , model_item[].class);
List<model_item> list = Arrays.asList(model);
final ListAdapter myadapter = new CustomItemAdapter(list_main_item.this,list);
new Handler(Looper.getMainLooper()).post(new Runnable() {
#Override
public void run() {
listview.setAdapter(myadapter);
Log.i("Item_shop_activity"," te dhenat e response");
}
});
}
});
setContentView(R.layout.activity_list__main_item);
}
}
my main xml file activity_list_main_item.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_item_shop"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.madrit.okhttp_gson_view.list_main_item">
<ListView
android:id="#+id/item_shop_list_view"
android:layout_width="wrap_content"
android:layout_height="match_parent">
</ListView>
</RelativeLayout>
the error
the error it gaved me
Please i need help , even if i have done any other stupid error with data parsing !!

Call setContentView(R.layout.activity_list__main_item); right after super.onCreate(savedInstanceState); or before assigning/accessing any views.

Adding Arraylist to custom object not updating values in android

In the below android activity, trying to display data in a view pager and it is working as expected.
But in loadItemsForSuppliers method, when i am adding SupplierAndItemList object to it's arraylist, value returned from getInventoriesByItemDetails method is not updating properly rather takes last value always.
Can some body assist me what's wrong here ?
public class ScreenSlidePagerActivity extends BaseActivity {
private ViewPager mPager;
private PagerAdapter mPagerAdapter;
private Dealer dealerObject;
private ArrayList<ItemDetail> itemDetails;
private List<Dealer> supplierList;
private ArrayList<SupplierAndItemList> supplierAndItemLists = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_screen_slide);
dealerObject = getIntent().getParcelableExtra(UiConstants.DEALER_OBJECT);
itemDetails = getIntent().getParcelableArrayListExtra("itemDetails");
supplierList = dealerObject.getParentSalesPoints(this,dealerObject.getServerId());
loadItemsForSuppliers();
mPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager(),supplierAndItemLists);
mPager.setAdapter(mPagerAdapter);
}
private void loadItemsForSuppliers() {
for (Dealer dealer : supplierList) {
ArrayList<ItemDetail> inventories = new ArrayList<>();
SupplierAndItemList supplierAndItem = new SupplierAndItemList();
supplierAndItem.setDealerName(dealer.getDealerName());
supplierAndItem.setSelectedItemList(getInventoriesByItemDetails(dealer, inventories));
supplierAndItemLists.add(supplierAndItem);
}
}
private ArrayList<ItemDetail> getInventoriesByItemDetails(Dealer dealer, ArrayList<ItemDetail> inventories) {
for (ItemDetail id : itemDetails) {
DealerInventory dealerInventory = new DealerInventory();
dealerInventory = dealerInventory.getLastModifiedInventory(this, id.getItemId(), dealer.getId());
if (dealerInventory != null) {
if (dealerInventory.getQuantity() >= 0) {
id.setParentSalesPointLastStock(String.valueOf(dealerInventory.getQuantity()));
id.setParentSalesPointLastStockTakingDate(dealerInventory.getStockTakingDate());
}
} else {
id.setParentSalesPointLastStock(UiConstants.NA);
id.setParentSalesPointLastStockTakingDate(UiConstants.NA);
}
inventories.add(id);
}
return inventories;
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
private final ArrayList<SupplierAndItemList> supplierAndItemList;
public ScreenSlidePagerAdapter(FragmentManager fm, ArrayList<SupplierAndItemList> supplierAndItemList) {
super(fm);
this.supplierAndItemList = supplierAndItemList;
}
#Override
public Fragment getItem(int position) {
SupplierAndItemList supplierAndItems = supplierAndItemList.get(position);
ScreenSlidePageFragment f = new ScreenSlidePageFragment();
Bundle bundle = new Bundle();
bundle.putParcelableArrayList("supplierAndItems",supplierAndItems.getSelectedItemList());
bundle.putString("supplierName",supplierAndItems.getDealerName());
f.setArguments(bundle);
return f;
}
#Override
public int getCount() {
return supplierAndItemList.size();
}
}
}
SupplierAndItemList class
public class SupplierAndItemList implements Parcelable {
public String dealerName;
public ArrayList<ItemDetail> selectedItemList;
public SupplierAndItemList() {
selectedItemList = new ArrayList<>();
}
public String getDealerName() {
return dealerName;
}
public void setDealerName(String dealerName) {
this.dealerName = dealerName;
}
public ArrayList<ItemDetail> getSelectedItemList() {
return selectedItemList;
}
public void setSelectedItemList(ArrayList<ItemDetail> itemList) {
this.selectedItemList = itemList;
}
protected SupplierAndItemList(Parcel in) {
dealerName = in.readString();
selectedItemList = in.readArrayList(ItemDetail.class.getClassLoader());
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(dealerName);
dest.writeList(selectedItemList);
}
#SuppressWarnings("unused")
public static final Parcelable.Creator<SupplierAndItemList> CREATOR = new Parcelable.Creator<SupplierAndItemList>() {
#Override
public SupplierAndItemList createFromParcel(Parcel in) {
return new SupplierAndItemList(in);
}
#Override
public SupplierAndItemList[] newArray(int size) {
return new SupplierAndItemList[size];
}
};
}
ItemDetail class
public class ItemDetail implements Parcelable {
public int itemId;
public String itemName;
public String salesPointLastStock;
public String salesPointLastStockTakingDate;
public String parentSalesPointLastStock;
public String parentSalesPointLastStockTakingDate;
public IDStockInput idStockInput;
public IDReturnInput idReturnInput;
public IDOrderInput idOrderInput;
public boolean isSelected;
public boolean isSelected() {
return isSelected;
}
public void setIsSelected(boolean isUpdated) {
this.isSelected = isUpdated;
}
public String getParentSalesPointLastStockTakingDate() {
return parentSalesPointLastStockTakingDate;
}
public void setParentSalesPointLastStockTakingDate(String parentSalesPointLastStockTakingDate) {
this.parentSalesPointLastStockTakingDate = parentSalesPointLastStockTakingDate;
}
public String getParentSalesPointLastStock() {
return parentSalesPointLastStock;
}
public void setParentSalesPointLastStock(String parentSalesPointLastStock) {
this.parentSalesPointLastStock = parentSalesPointLastStock;
}
#NonNull
public int getItemId() {
return itemId;
}
public void setItemId(int itemId) {
this.itemId = itemId;
}
#NonNull
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
#NonNull
public String getSalesPointLastStock() {
return salesPointLastStock;
}
public void setSalesPointLastStock(String salesPointLastStock) {
this.salesPointLastStock = salesPointLastStock;
}
#NonNull
public String getSalesPointLastStockTakingDate() {
return salesPointLastStockTakingDate;
}
public void setSalesPointLastStockTakingDate(String salesPointLastStockTakingDate) {
this.salesPointLastStockTakingDate = salesPointLastStockTakingDate;
}
public IDStockInput getIdStockInput() {
return idStockInput;
}
public void setIdStockInput(IDStockInput idStockInput) {
this.idStockInput = idStockInput;
}
public IDReturnInput getIdReturnInput() {
return idReturnInput;
}
public void setIdReturnInput(IDReturnInput idReturnInput) {
this.idReturnInput = idReturnInput;
}
public IDOrderInput getIdOrderInput() {
return idOrderInput;
}
public void setIdOrderInput(IDOrderInput idOrderInput) {
this.idOrderInput = idOrderInput;
}
public ItemDetail() {
idStockInput = new IDStockInput();
idReturnInput = new IDReturnInput();
idOrderInput = new IDOrderInput();
}
protected ItemDetail(Parcel in) {
itemId = in.readInt();
itemName = in.readString();
salesPointLastStock = in.readString();
salesPointLastStockTakingDate = in.readString();
parentSalesPointLastStock = in.readString();
parentSalesPointLastStockTakingDate = in.readString();
isSelected =in.readInt()==1;
idStockInput = (IDStockInput) in.readValue(IDStockInput.class.getClassLoader());
idReturnInput = (IDReturnInput) in.readValue(IDReturnInput.class.getClassLoader());
idOrderInput = (IDOrderInput) in.readValue(IDOrderInput.class.getClassLoader());
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(itemId);
dest.writeString(itemName);
dest.writeString(salesPointLastStock);
dest.writeString(salesPointLastStockTakingDate);
dest.writeString(parentSalesPointLastStock);
dest.writeString(parentSalesPointLastStockTakingDate);
dest.writeInt(isSelected ? 1 : 0);
dest.writeValue(idStockInput);
dest.writeValue(idReturnInput);
dest.writeValue(idOrderInput);
}
#SuppressWarnings("unused")
public static final Parcelable.Creator<ItemDetail> CREATOR = new Parcelable.Creator<ItemDetail>() {
#Override
public ItemDetail createFromParcel(Parcel in) {
return new ItemDetail(in);
}
#Override
public ItemDetail[] newArray(int size) {
return new ItemDetail[size];
}
};
}

I have go through your method I have found some assigning value issue
private void loadItemsForSuppliers() {
for (Dealer dealer : supplierList) {
ArrayList<ItemDetail> inventories = new ArrayList<>();
SupplierAndItemList supplierAndItem = new SupplierAndItemList();
supplierAndItem.setDealerName(dealer.getDealerName());
supplierAndItem.setSelectedItemList(getInventoriesByItemDetails(dealer, inventories));
supplierAndItemLists.add(supplierAndItem);
}
}
private ArrayList<ItemDetail> getInventoriesByItemDetails(Dealer dealer, ArrayList<ItemDetail> inventories) {
for (ItemDetail id : itemDetails) {
DealerInventory dealerInventory = new DealerInventory();
dealerInventory = dealerInventory.getLastModifiedInventory(this, id.getItemId(), dealer.getId());
if (dealerInventory != null) {
if (dealerInventory.getQuantity() >= 0) {
id.setParentSalesPointLastStock(String.valueOf(dealerInventory.getQuantity()));
id.setParentSalesPointLastStockTakingDate(dealerInventory.getStockTakingDate());
}
} else {
id.setParentSalesPointLastStock(UiConstants.NA);
id.setParentSalesPointLastStockTakingDate(UiConstants.NA);
}
inventories.add(id); // do this
}
return inventories; // you are not assigning value anywhere;
}
You are not assigning value to the inventories in getInventoriesByItemDetails. I think you should add item through inventories.add(id);
Check it , Hope this help

Set
mPager.setOffscreenPageLimit(1);