ArhamTechMind

Building future while learning

JSON Example

  • JSON :- JavaScript Object Notation
  • It contains key/value pairs
  • Key-> Strings
  • Values:->JSON
  • {}   :-> JSON Object
  • []    :-> JSON array
Syntax :
{“employees”:[
    {“firstName”:“John”“lastName”:“Doe”},
    {“firstName”:“Anna”“lastName”:“Smith”},
    {“firstName”:“Peter”“lastName”:“Jones”}
]}

package csdevbin.json;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

import org.json.JSONObject;

public class MainActivity extends AppCompatActivity {

    public static final String JSON_STRING = “{employee:{name:John,salary:6000}}”;

    @Override
   
public void onCreate(Bundle savedInstanceState) {
       
super.onCreate(savedInstanceState);
        setContentView(R.layout.
activity_main);

        TextView textView1 = (TextView) findViewById(R.id.textView1);

        try {
            JSONObject emp = (
new JSONObject(JSON_STRING)).getJSONObject(“employee”);
            String empname = emp.getString(
“name”);
           
int empsalary = emp.getInt(“salary”);

            String str = “Employee Name:” + empname + n+ “Employee Salary:” + empsalary;
            textView1.setText(str);

        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

<?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_main"
   
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="csdevbin.json.MainActivity">

    <
TextView

       
android:id="@+id/textView1"
       
android:layout_width="wrap_content"
       
android:layout_height="wrap_content"
       
android:layout_alignParentLeft="true"
       
android:layout_alignParentTop="true"
       
android:layout_marginLeft="75dp"
       
android:layout_marginTop="46dp"
       
android:text="TextView" />

</
RelativeLayout>