API Retrofit2 Save Response in string then convert to json

 

Security Reason solve 

Add Code

android:usesCleartextTraffic="true"

How to add internet permission in AndroidManifest.xml in android studio.

Step 1 :

Go to app -> src -> main -> AndroidManifest.xml.

Step 2:

Copy following code:

To add a dependency to your project, specify a dependency configuration such as implementation in the dependencies block of your module's build.gradle file.

For example, the following build.gradle file for an app module includes three different types of dependencies:


plugins {
  id 'com.android.application'
}

android { ... }

dependencies {
    // Dependency on a local library module for retrofit2
   implementation 'com.squareup.retrofit2:retrofit:2.7.2'
    implementation 'com.squareup.retrofit2:converter-gson:2.7.2'
    implementation 'com.squareup.okhttp3:okhttp:3.6.0'
    implementation 'com.squareup.retrofit2:converter-scalars:2.9.0'
//update
implementation("com.squareup.retrofit2:converter-gson:2.7.2")
implementation("com.squareup.okhttp3:okhttp:3.6.0")
implementation("com.squareup.retrofit2:converter-scalars:2.9.0")
implementation ("com.squareup.picasso:picasso:2.8")
implementation ("com.squareup.retrofit2:retrofit:2.9.0")
}

Create Api Function Step 1

Step 2: ( public Call<String> get();)

use Retrofit Calling  this function public Call<String> get()

Request body

If the JSON data describes an array, and each element of that array is an object:

[
  {
    "id": 0,
    "sectionOfferId": [
      0
    ],
    "studentID": "string",
    "discipline": "string"
  }
]

the JSON Data Set will create a row for each object in the array, and each property on the object will become a column. 

send Intent Array of Object 

app/src/main/java/com/example/app/Intent.java

ArrayList<Integer> selectCourse= new ArrayList<>();                   
  JSONArray jsonArray = new JSONArray();ArrayList<Integer> selectCourse= new ArrayList<>();
                    JSONObject jsonObject = new JSONObject();
                    jsonArray.put(jsonObject);
                    try {
                        jsonObject.put("id", binding.spinnerDiscipline.getSelectedItem());
                        jsonObject.put("sectionOfferId", selectCourse);
//                        jsonObject.put("studentID", "string");
//                        jsonObject.put("discipline", "string");
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
//                    jsonArray.put(jsonObject);
//                    String sendDataIntent=
                    Gson gson= new Gson();
//                    Toast.makeText(AdminSettingAssignCourseActivity.this, ""+jsonArray.toString(), Toast.LENGTH_SHORT).show();
                Intent intent = new Intent(getApplicationContext(),AdminSettingAssignCourseAssignStudentActivity.class);
                intent.putExtra("Data",jsonArray.toString());
                startActivity(intent);

app/src/main/java/com/example/app/LatestCheck.java

package com.example.quanta;

import android.os.Bundle;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;

import com.example.quanta.adapter.ListShowAdapter;
import com.example.quanta.model.Shop;
import com.google.gson.Gson;
import com.example.quanta.api.Api;
import com.example.quanta.databinding.ActivitySplashScreenBinding;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.reflect.TypeToken;


import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.lang.reflect.Type;
import java.util.ArrayList;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.scalars.ScalarsConverterFactory;

public class SplashScreenActivity extends AppCompatActivity {
ActivitySplashScreenBinding binding;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding= ActivitySplashScreenBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(Api.BASE_URL)
                .addConverterFactory(ScalarsConverterFactory.create())
                .build();

        Api api = retrofit.create(Api.class);
        api.GetData(40.7128f,40.7128f).enqueue(new Callback<String>() {
            @Override
            public void onResponse(Call<String> call, Response<String> response) {
                if(response.isSuccessful()){
                    String json = response.body().toString();
                    // Parse the JSON string to a JsonObject
                    JsonParser jsonParser = new JsonParser();
                    JsonObject jsonObject = jsonParser.parse(json).getAsJsonObject();


//
                    // Get the JSON array from the JsonObject using the correct key
                    JsonObject firstObject = jsonObject.getAsJsonObject("data").getAsJsonObject("shops");
                    JsonArray dataArray = firstObject.getAsJsonArray("data");
                    Type userListType = new TypeToken<ArrayList<Shop>>(){}.getType();
                    Gson gson= new Gson();
                    ArrayList<Shop> ShopList = new ArrayList<>();
                    ShopList.addAll(gson.fromJson(dataArray, userListType));

                    ListShowAdapter adapter = new
                            ListShowAdapter(ShopList, getApplicationContext());
                    LinearLayoutManager manager = new LinearLayoutManager(getApplicationContext());
                    binding.RecycerviewAdminHome.setLayoutManager(manager);
                    binding.RecycerviewAdminHome.setHasFixedSize(true);
                    binding.RecycerviewAdminHome.
                            setAdapter(adapter);
//                    binding.txtViewShow.setText(response.body());
                    Toast.makeText(SplashScreenActivity.this, ""+ShopList.get(9).getAddress(), Toast.LENGTH_SHORT).show();
                }
//                Toast.makeText(SplashScreenActivity.this, ""+response.code(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onFailure(Call<String> call, Throwable t) {
                Toast.makeText(SplashScreenActivity.this, ""+t, Toast.LENGTH_SHORT).show();
            }
        });

    }
}

Get Intent Array of Object 

app/src/main/java/com/example/app/Intent.java

setContentView(binding.getRoot());
JSONArray jsonArray = null;
String IntentData=getIntent().getStringExtra("Data");
try {
  jsonArray = new JSONArray(IntentData);
  JSONObject jsonObject = jsonArray.getJSONObject(0);
    Toast.makeText(this, ""+jsonObject.getString("sectionOfferId"), Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
    e.printStackTrace();
}

Use JSONObject to send List  Intent 

Code JSONObject

                    JSONArray jsonArray = new JSONArray();
                    JSONObject jsonObject = new JSONObject();
                    jsonArray.put(jsonObject);
                    //search ID List
//                    int secID = 0; // set a default value if no matching SectionOffer is found
//                    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
//                        secID = sectionOffers.stream()
//                                .filter(s -> s.getDiscipline().contains(binding.spinnerDiscipline.getSelectedItem().toString()))
//                                .findFirst()
//                                .map(SectionOffer::getId)
//                                .orElse(-1);
//                    }
//                    Toast.makeText(AdminSettingAssignCourseActivity.this, ""+ secID, Toast.LENGTH_SHORT).show();


                    try {
                        Gson gson= new Gson();
                        jsonObject.put("id", 0);
                        jsonObject.put("sectionOfferId",gson.toJson(selectCourseObj));
                        jsonObject.put("discipline", binding.spinnerDiscipline.getSelectedItem());
//
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }

//                    Toast.makeText(AdminSettingAssignCourseActivity.this, ""+jsonArray.toString(), Toast.LENGTH_SHORT).show();
                Intent intent = new Intent(getApplicationContext(),AdminSettingAssignCourseAssignStudentActivity.class);
                intent.putExtra("Data",jsonArray.toString());
                startActivity(intent);

Use JSONArray to get List  Intent 

Code JSONArray

JSONArray jsonArrayIntent = null;
JSONArray jsonArraySentApi = null;
JSONObject jsonObjectIntent=null;
ArrayList<SectionOffer> sectionOffers;
ArrayList<Integer> selectCourseID= new ArrayList<>();

String IntentData=getIntent().getStringExtra("Data");
        try {
          jsonArrayIntent  = new JSONArray(IntentData);
          jsonArraySentApi  = new JSONArray();
          jsonObjectIntent  = jsonArrayIntent .getJSONObject(0);

//            JSONArray   jsonArrayObj = new JSONArray(jsonObject.getString("sectionOfferId"));
            Gson gson = new Gson();
         sectionOffers=gson.fromJson(jsonObjectIntent.getString("sectionOfferId"), new TypeToken<ArrayList<SectionOffer>>(){}.getType());
            for (SectionOffer sectionO:sectionOffers) {
                selectCourseID.add(sectionO.getId());
            }
//          Toast.makeText(this, ""+sectionOffers.get(0).courseCode, Toast.LENGTH_SHORT).show();
        } catch (JSONException e) {
            e.printStackTrace();
        }

Use RecyclerView Click item  to Store  JSONArray List  And Remove JSONObject 

Code JSONArray

ArrayList<Student> students= new ArrayList<>();
    public void RecyclerviewAssignCourseSelectStudent(Student obj, Context context, String Select) {
//        Toast.makeText(context, "jj", Toast.LENGTH_LONG).show();
        if(Select.contains("Add")){
            students.add(obj);

            try {
                JSONObject jsonObjectSelect = new JSONObject(jsonObjectIntent.toString());
                JSONArray array= new JSONArray(selectCourseID.toString());
                jsonObjectSelect.put("sectionOfferId",array);
                jsonObjectSelect.put("studentID", obj.getAridNo());
                jsonArraySentApi.put(jsonObjectSelect);
                Toast.makeText(context, jsonArraySentApi.toString(), Toast.LENGTH_LONG).show();
            } catch (JSONException e) {
                e.printStackTrace();
            }
            binding.searchBar.setText(jsonArraySentApi.toString());
        }else{
            for (int i = 0; i < jsonArraySentApi.length(); i++) {
                try {
                    if (jsonArraySentApi.getJSONObject(i).getString("studentID").contains(obj.getAridNo())) {
                        jsonArraySentApi.remove(i);
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }

            }
            }
    }

Send Data Api Use JSONArray  and Api Function 

@GET("api/dvr-details")
public Call<String> api_dvr_details_String();

  //api calling send data

        binding.floatingBtnSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                RequestBody requestBody = RequestBody.create(MediaType.parse("application/json"), jsonArraySentApi.toString());
                Toast.makeText(getApplicationContext(), ""+jsonArraySentApi, Toast.LENGTH_SHORT).show();
                api.student_enroll(requestBody).enqueue(new Callback<String>() {
                    @Override
                    public void onResponse(Call<String> call, Response<String> response) {
//                        binding.searchBar.setText(response.code());
                        Toast.makeText(AdminSettingAssignCourseAssignStudentActivity.this, ""+response.code(), Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onFailure(Call<String> call, Throwable t) {
//                        binding.searchBar.setText(t.toString());
//                        Toast.makeText(AdminSettingAssignCourseAssignStudentActivity.this, ""+t.toString(), Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });

Get Data Api Use JSONArray  and Api Function 

@POST("api/student-enroll")
public Call<String> student_enroll(@Body RequestBody jsonArray);

       ArrayList<JSONObject> jsonlist=new ArrayList<>();
        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(Api.BASE_URL)
                .addConverterFactory(ScalarsConverterFactory.create())
                .build();

        Api api = retrofit.create(Api.class);
 //api calling send data
        api.api_dvr_details_String().enqueue(new Callback<String>() {
            @Override
            public void onResponse(Call<String> call, Response<String> response) {
                if(response.isSuccessful()){
//                    Toast.makeText(notification.this, ""+response.body(), Toast.LENGTH_SHORT).show();
                    try {
                        JSONArray jsonArray= new JSONArray(response.body().toString());

                        for (int i = 0; i < jsonArray.length(); i++) {
                            JSONObject jsonObject = jsonArray.getJSONObject(i);
                            jsonlist.add(jsonObject);
                        }
//             not working//       ArrayList<JSONObject> list= new Gson().fromJson(jsonArray.toString(),new TypeToken<ArrayList<JSONObject>>(){}.getType());
                    } catch (JSONException e) {
                        Toast.makeText(notification.this, ""+e, Toast.LENGTH_SHORT).show();
                        e.printStackTrace();
                    }
                    //recyclerView calling Code
//                    DVRApapter dvrApapter= new DVRApapter(jsonlist,getApplicationContext());
//                    RecyclerView recyclerView= findViewById(R.id.recycler_view) ;
//                    LinearLayoutManager manager = new LinearLayoutManager(getApplicationContext());
//                    recyclerView.setLayoutManager(manager);
//                    recyclerView.setAdapter(dvrApapter);
                }

            }

            @Override
            public void onFailure(Call<String> call, Throwable t) {
                Toast.makeText(notification.this, ""+t, Toast.LENGTH_SHORT).show();
            }
        });


        // get JSonObject Data And Key
        JSONObject obj = jsonlist.get(0);
        HashMap<String, Object> keyMap = new HashMap<>();

        Iterator<String> keysIterator = obj.keys();
        List<String> keyListNEWADD = new ArrayList<>(Arrays.asList("id", "ip", "name", "channel", "host", "password"));
        ArrayList<String> keyListADDRunTimeList = new ArrayList<>();

        while (keysIterator.hasNext()) {
            String key = keysIterator.next();
            keyListADDRunTimeList.add(key);
            try {
                keyMap.put(key, obj.get(key));
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
//        Object typeCheck= keyMap.get("id");
//        Toast.makeText(context, ""+typeCheck.getClass().getSimpleName(), Toast.LENGTH_SHORT).show();
//        textView.setText(keyMap.get(keyListADDRunTimeList.get(0))+"");




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