JSON PARSER

JSON-PARSER

Program-6:
Create two files of XML and JSON type with values for City_Name, Latitude,
Longitude, Temperature, and Humidity. Develop an application to create an activity
with two buttons to parse the XML and JSON files which when clicked should display
the data in their respective layouts side by side.
1) Firstly, Create an Application by Name “JsonParser”
2) Go to xml code of design change the layout to “RelativeLayout”
3) Add TextView component & change the following properties:
1) Size: 38dp
2) Text: XML and JSON Parser
3) Center-Align
4) Add Two Buttons to Design & change the name “ParseXml” & “ParseJson” with following
onclick functions:
• ParseXml-Button: parsexml
• ParseJson-Button: parsejson
5) Add TextView component & change the following properties:
• Id: display
• Text: “”
• Align: Center
6) Add Assets folder by following the given hierarchy:
App->new->folder->Assests folder
7) Inside the assets folder create new files of xml and json using the following hierarchy:
new->file->city.xml
new->file->city.json
once created place the following details inside the “city.xml” and “city.json”
city.xml:
<?xml version="1.0"?>
<records>
 <place>
 <name>Mysore</name>
 <lat>12.295</lat>
 <long>76.639</long>
 <temperature>22</temperature>
 <humidity>90%</humidity>
 </place>
 <place>
 <name>Bangalore</name>
 <lat>13.295</lat>
 <long>77.639</long>
<temperature>25</temperature>
 <humidity>74%</humidity>
 </place>
</records>
city.json:
[
 {
 "name":"HASSAN",
 "lat":"12.295",
 "long":"76.639",
 "temperature":"22",
 "humidity":"92%"
 },
 {
 "name":"MANDYA",
 "lat":"10.11",
 "long":"66.639",
 "temperature":"24",
 "humidity":"82%"
 }
]
XML-CODE:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".MainActivity">
 <TextView
 android:id="@+id/textView"
 android:layout_width="257dp"
android:layout_height="59dp"
 android:layout_alignParentEnd="true"
 android:layout_alignParentBottom="true"
 android:layout_marginEnd="74dp"
 android:layout_marginBottom="453dp"
 android:text="PARSER"
 android:textSize="36sp"
 tools:layout_editor_absoluteX="194dp"
 tools:layout_editor_absoluteY="126dp" />
 <Button
 android:id="@+id/button"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentEnd="true"
 android:layout_alignParentBottom="true"
 android:layout_marginEnd="260dp"
 android:layout_marginBottom="371dp"
 android:backgroundTint="#F1B763"
 android:onClick="parsexml"
 android:text="XML"
 android:textAlignment="center" />
 <Button
 android:id="@+id/button2"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentEnd="true"
 android:layout_alignParentBottom="true"
 android:layout_marginEnd="118dp"
 android:layout_marginBottom="373dp"
 android:backgroundTint="#CDDC39"
 android:onClick="parsejson"
 android:text="JSON"
 android:textAlignment="center" />
 <TextView
 android:id="@+id/display"
 android:layout_width="402dp"
 android:layout_height="332dp"
 android:layout_alignParentEnd="true"
 android:layout_alignParentBottom="true"
 android:layout_marginEnd="9dp"
 android:layout_marginBottom="11dp"
 android:textAlignment="center"
 android:textColor="#EF3A78" />
</RelativeLayout>


JAVA-CODE
package com.example.parserapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONObject;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
public class MainActivity extends AppCompatActivity {
 TextView display;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 display=findViewById(R.id.display);
 }
 public void parsexml(View v){
 try {
 InputStream is=getAssets().open("city.xml");
 DocumentBuilderFactory documentBuilderFactory =
DocumentBuilderFactory.newInstance();
 DocumentBuilder
documentBuilder=documentBuilderFactory.newDocumentBuilder();
 Document document=documentBuilder.parse(is);
 StringBuilder stringBuilder=new StringBuilder();
 stringBuilder.append("XML DATA");
 stringBuilder.append("\n-------------");
 NodeList nodeList=document.getElementsByTagName("place");
 for(int i=0; i<nodeList.getLength();i++){
 Node node = nodeList.item(i);
 if(node.getNodeType()==Node.ELEMENT_NODE){
 Element element = (Element)node;
 stringBuilder.append("\n Name:").append(getValue("name",element));
 stringBuilder.append("\n Latitude:").append(getValue("lat",element));
 stringBuilder.append("\n Longitude:").append(getValue("long",element));
stringBuilder.append("\n
Temperature:").append(getValue("temperature",element));
 stringBuilder.append("\n humidity").append(getValue("humidity",element));
 stringBuilder.append("\n----------");
 }
 }
 display.setText(stringBuilder.toString());
 }
 catch (Exception e){
 e.printStackTrace();
 Toast.makeText(MainActivity.this,"Error in reading XML
FILE",Toast.LENGTH_LONG).show();
 }
 }
 public void parsejson(View V){
 String json;
 StringBuilder stringBuilder = new StringBuilder();
 try {
 InputStream is = getAssets().open("city.json");
 int size=is.available();
 byte[] buffer=new byte[size];
 is.read(buffer);
 json = new String(buffer, StandardCharsets.UTF_8);
 JSONArray jsonArray = new JSONArray(json);
 stringBuilder.append("JSON DATA");
 stringBuilder.append("\n--------");
 for(int i=0;i<jsonArray.length();i++){
 JSONObject jsonObject = jsonArray.getJSONObject(i);
 stringBuilder.append("\n Name:").append(jsonObject.getString("name"));
 stringBuilder.append("\n Latidue:").append(jsonObject.getString("lat"));
 stringBuilder.append("\n Longitude:").append(jsonObject.getString("long"));
 stringBuilder.append("\n
Temperature:").append(jsonObject.getString("temperature"));
 stringBuilder.append("\n Humidity:").append(jsonObject.getString("humidity"));
 stringBuilder.append("\n----------");
 }
 display.setText(stringBuilder.toString());
 is.close();
 }
 catch (Exception e){
 e.printStackTrace();
 Toast.makeText(MainActivity.this,"Error in reading JSON
file",Toast.LENGTH_LONG).show();
 }
}
 private String getValue(String tag,Element element){
return
element.getElementsByTagName(tag).item(0).getChildNodes().item(0).getNodeValue();
 }
}