in an android app . this is javacode to read api from web , import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import android.widget.Toast; import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { privateList universityList; @Override protectedvoidonCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); universityList = new ArrayList<>(); String url ="http://universities.hipolabs.com/search?country=Canada"; JsonObjectRequest request =newJsonObjectRequest(Request.Method.GET, url,null, newResponse.Listener(){ @Override publicvoidonResponse(JSONObject response){ try{ JSONArray jsonArray = response.getJSONArray("data"); for(int i =0; i < jsonArray.length(); i++){ JSONObject jsonObject = jsonArray.getJSONObject(i); String name = jsonObject.getString("name"); String province = jsonObject.getString("state-province"); String webPage = jsonObject.getString("web_page"); University university =newUniversity(name, province, webPage); universityList.add(university); } RecyclerView recyclerView =findViewById(R.id.recyclerView); recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this)); UniversityAdapter adapter =newUniversityAdapter(universityList); recyclerView.setAdapter(adapter); }catch(JSONException e){ e.printStackTrace(); } } },newResponse.ErrorListener(){ @Override publicvoidonErrorResponse(VolleyError error){ Toast.makeText(MainActivity.this,"Error fetching data",Toast.LENGTH_SHORT).show(); } }); // Add the request to the RequestQueue RequestQueue queue =Volley.newRequestQueue(this); queue.add(request); } privatestaticclassUniversity{ privateString name; privateString province; privateString webPage; publicUniversity(String name,String province,String webPage){ this.name = name; this.province = province; this.webPage = webPage; } publicStringgetName(){ return name; } publicStringgetProvince(){ return province; } publicStringgetWebPage(){ return webPage; } } privatestaticclassUniversityAdapterextendsRecyclerView.Adapter{ privateList universityList; publicUniversityAdapter(List universityList){ this.universityList = universityList; } @Override publicViewHolderonCreateViewHolder(ViewGroup parent,int viewType){ View view =LayoutInflater.from(parent.getContext()).inflate(R.layout.university_item, parent,false); returnnewViewHolder(view); } @Override publicvoidonBindViewHolder(ViewHolder holder,int position){ University university = universityList.get(position); holder.nameTextView.setText(university.getName()); holder.provinceTextView.setText(university.getProvince()); holder.webPageTextView.setText(university.getWebPage()); } @Override publicintgetItemCount(){ return universityList.size(); } publicstaticclassViewHolderextendsRecyclerView.ViewHolder{ TextView nameTextView; TextView provinceTextView; TextView webPageTextView; '-- create a xml code that can display Name, Province and Web Page Address of the universities and colleges in Canada from this API.

in an android app . this is javacode to read api from web , import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import android.widget.Toast; import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { privateList universityList; @Override protectedvoidonCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); universityList = new ArrayList<>(); String url ="http://universities.hipolabs.com/search?country=Canada"; JsonObjectRequest request =newJsonObjectRequest(Request.Method.GET, url,null, newResponse.Listener(){ @Override publicvoidonResponse(JSONObject response){ try{ JSONArray jsonArray = response.getJSONArray("data"); for(int i =0; i < jsonArray.length(); i++){ JSONObject jsonObject = jsonArray.getJSONObject(i); String name = jsonObject.getString("name"); String province = jsonObject.getString("state-province"); String webPage = jsonObject.getString("web_page"); University university =newUniversity(name, province, webPage); universityList.add(university); } RecyclerView recyclerView =findViewById(R.id.recyclerView); recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this)); UniversityAdapter adapter =newUniversityAdapter(universityList); recyclerView.setAdapter(adapter); }catch(JSONException e){ e.printStackTrace(); } } },newResponse.ErrorListener(){ @Override publicvoidonErrorResponse(VolleyError error){ Toast.makeText(MainActivity.this,"Error fetching data",Toast.LENGTH_SHORT).show(); } }); // Add the request to the RequestQueue RequestQueue queue =Volley.newRequestQueue(this); queue.add(request); } privatestaticclassUniversity{ privateString name; privateString province; privateString webPage; publicUniversity(String name,String province,String webPage){ this.name = name; this.province = province; this.webPage = webPage; } publicStringgetName(){ return name; } publicStringgetProvince(){ return province; } publicStringgetWebPage(){ return webPage; } } privatestaticclassUniversityAdapterextendsRecyclerView.Adapter{ privateList universityList; publicUniversityAdapter(List universityList){ this.universityList = universityList; } @Override publicViewHolderonCreateViewHolder(ViewGroup parent,int viewType){ View view =LayoutInflater.from(parent.getContext()).inflate(R.layout.university_item, parent,false); returnnewViewHolder(view); } @Override publicvoidonBindViewHolder(ViewHolder holder,int position){ University university = universityList.get(position); holder.nameTextView.setText(university.getName()); holder.provinceTextView.setText(university.getProvince()); holder.webPageTextView.setText(university.getWebPage()); } @Override publicintgetItemCount(){ return universityList.size(); } publicstaticclassViewHolderextendsRecyclerView.ViewHolder{ TextView nameTextView; TextView provinceTextView; TextView webPageTextView; '-- create a xml code that can display Name, Province and Web Page Address of the universities and colleges in Canada from this API.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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in an android app . this is javacode to read api from web ,

import androidx.appcompat.app.AppCompatActivity;

import androidx.recyclerview.widget.LinearLayoutManager;

import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TextView;

import android.widget.Toast;

import com.android.volley.Request;

import com.android.volley.RequestQueue;

import com.android.volley.Response;

import com.android.volley.VolleyError;

import com.android.volley.toolbox.JsonObjectRequest;

import com.android.volley.toolbox.Volley;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.util.ArrayList;

import java.util.List;

public class MainActivity extends AppCompatActivity {

privateList<University> universityList;

@Override

protectedvoidonCreate(Bundle savedInstanceState){

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

universityList = new ArrayList<>();

String url ="http://universities.hipolabs.com/search?country=Canada";

JsonObjectRequest request =newJsonObjectRequest(Request.Method.GET, url,null,

newResponse.Listener<JSONObject>(){

@Override

publicvoidonResponse(JSONObject response){

try{

JSONArray jsonArray = response.getJSONArray("data");

for(int i =0; i < jsonArray.length(); i++){

JSONObject jsonObject = jsonArray.getJSONObject(i);

String name = jsonObject.getString("name");

String province = jsonObject.getString("state-province");

String webPage = jsonObject.getString("web_page");

University university =newUniversity(name, province, webPage);

universityList.add(university);

}

RecyclerView recyclerView =findViewById(R.id.recyclerView);

recyclerView.setLayoutManager(new LinearLayoutManager(MainActivity.this));

UniversityAdapter adapter =newUniversityAdapter(universityList);

recyclerView.setAdapter(adapter);

}catch(JSONException e){

e.printStackTrace();

}

},newResponse.ErrorListener(){

@Override

publicvoidonErrorResponse(VolleyError error){

Toast.makeText(MainActivity.this,"Error fetching data",Toast.LENGTH_SHORT).show();

}

});

// Add the request to the RequestQueue

RequestQueue queue =Volley.newRequestQueue(this);

queue.add(request);

}

privatestaticclassUniversity{

privateString name;

privateString province;

privateString webPage;

publicUniversity(String name,String province,String webPage){

this.name = name;

this.province = province;

this.webPage = webPage;

}

publicStringgetName(){

return name;

}

publicStringgetProvince(){

return province;

}

publicStringgetWebPage(){

return webPage;

}

privatestaticclassUniversityAdapterextendsRecyclerView.Adapter<UniversityAdapter.ViewHolder>{

privateList<University> universityList;

publicUniversityAdapter(List<University> universityList){

this.universityList = universityList;

}

@Override

publicViewHolderonCreateViewHolder(ViewGroup parent,int viewType){

View view =LayoutInflater.from(parent.getContext()).inflate(R.layout.university_item, parent,false);

returnnewViewHolder(view);

}

@Override

publicvoidonBindViewHolder(ViewHolder holder,int position){

University university = universityList.get(position);

holder.nameTextView.setText(university.getName());

holder.provinceTextView.setText(university.getProvince());

holder.webPageTextView.setText(university.getWebPage());

}

@Override

publicintgetItemCount(){

return universityList.size();

}

publicstaticclassViewHolderextendsRecyclerView.ViewHolder{

TextView nameTextView;

TextView provinceTextView;

TextView webPageTextView;

'--

create a xml code that can display Name, Province and Web Page Address of the universities and colleges in Canada from this API.

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