1.Json Parsing with object

1.content_main.xml

<?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:id="@+id/content_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"

    android:background="#ab3400"

    app:layout_behavior="@string/appbar_scrolling_view_behavior"

    tools:context="com.example.nc.jsonparsing.MainActivity"

    tools:showIn="@layout/activity_main">

   <TextView

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:id="@+id/textView1"

    android:text="Amir"

    android:textSize="30dp"

    android:textStyle="bold"

    />

</RelativeLayout>

2.MainActivity.java

package com.example.nc.jsonparsing;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.widget.TextView;

import org.json.JSONException;

import org.json.JSONObject;

public class MainActivity extends Activity {

    TextView textView1,textView2;

    String name;

    int id;

    public static final String ParsingData= "{\"employee\":{\"name\":\"amir\",\"salary\":56000,\"married\":false}}";

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

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

        try{

            JSONObject jsonObject=new JSONObject(ParsingData).getJSONObject("employee");

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

            int salary=jsonObject.getInt("salary");

            String status= jsonObject.getString("married");

            String str="Employee Name:"+name+"\nEmployee:"+salary+"\nstatus:"+status;

            textView1.setText(str);

        }

        catch(JSONException e)

        {

        }

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;

    }

}

2..RecyclerView With Example

design view xml

1.content_main

<?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:id="@+id/content_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="nc.example.com.lunch.MainActivity"
    tools:showIn="@layout/activity_main">


    <android.support.v7.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        android:id="@+id/recycler_view">
    </android.support.v7.widget.RecyclerView>
</RelativeLayout>

2.item_layout

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:card_view="http://schemas.android.com/apk/res-auto"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:layout_marginTop="4dp"

    android:background="@drawable/design"

    xmlns:tools="http://schemas.android.com/tools">

    <android.support.v7.widget.CardView

        xmlns:card_view="http://schemas.android.com/apk/res-auto"

        android:id="@+id/card_view"

        android:layout_width="match_parent"

        android:layout_margin="3dp"

        android:layout_height="match_parent"

        card_view:cardCornerRadius="1dp">

        <ImageView

            android:id="@+id/img"

            android:layout_width="match_parent"

            android:layout_height="200dp"

            android:scaleType="centerCrop"

            android:src="@drawable/sandwich" />

        <TextView

            android:id="@+id/txtdesc"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_marginTop="180dp"

            android:text="With a marvellous taste"

            android:textColor="@color/black"

            android:textStyle="bold|italic" />

        <TextView

            android:id="@+id/d_name"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_marginLeft="290dp"

            android:text="Price Rs....."

            android:textColor="@color/black"

            android:textSize="15sp"

            android:textStyle="bold" />

        <TextView

            android:id="@+id/f_name"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="Name"

            android:textColor="@color/black"

            android:textSize="15sp"

            android:textStyle="bold" />

    </android.support.v7.widget.CardView>

</LinearLayout>

java side

1.MainActivity.java

package nc.example.com.lunch;

import android.os.Bundle;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    RecyclerView recyclerView;

    RecyclerView.Adapter adapter;

    RecyclerView.LayoutManager layoutManager;

    String[]F_name,D_name;

    int[] Img_res={R.drawable.roti,R.drawable.naan,R.drawable.alooparatha,

            R.drawable.dalfry,R.drawable.kadi,R.drawable.pp};

    ArrayList<Dataprovider>arrayList=new ArrayList<Dataprovider>();

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

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

        F_name=getResources().getStringArray(R.array.names);

        D_name=getResources().getStringArray(R.array.price);

        int i=0;

        for (String name:F_name)

        {

            Dataprovider dataprovider=new Dataprovider(Img_res[i],name,D_name[i]);

            arrayList.add(dataprovider);

            i++;

        }

        adapter=new RecyclerAdapter(arrayList);

        recyclerView.setHasFixedSize(true);

        layoutManager=new LinearLayoutManager(this);

        recyclerView.setLayoutManager(layoutManager);

        recyclerView.setAdapter(adapter);

    }

}

2.DataProvider

package nc.example.com.lunch;

/**

 * Created by nc on 5/10/2017.

 */

public class Dataprovider {

    public Dataprovider(int img_res,String f_name,String d_name)

    {

        this.setImg_res(img_res);

        this.setF_name(f_name);

        this.setD_name(d_name);

    }

    private int img_res;

    private String f_name,d_name;

    public int getImg_res()

    {

        return img_res;

    }

    public void setImg_res(int img_res)

    {

        this.img_res = img_res;

    }

    public String getF_name()

    {

        return f_name;

    }

    public void setF_name(String f_name)

    {

        this.f_name = f_name;

    }

    public String getD_name()

    {

        return d_name;

    }

    public void setD_name(String d_name)

    {

        this.d_name = d_name;

    }

}

3.RecyclerAdapter

package nc.example.com.lunch;

import android.support.v7.widget.RecyclerView;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;

import android.widget.TextView;

import java.util.ArrayList;

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder> {

    private ArrayList<Dataprovider> arrayList=new ArrayList<Dataprovider>();

    public RecyclerAdapter(ArrayList<Dataprovider>arrayList)

    {

        this.arrayList=arrayList;

    }

    @Override

    public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

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

        RecyclerViewHolder recyclerViewHolder=new RecyclerViewHolder(view);

        return recyclerViewHolder;

    }

    @Override

    public void onBindViewHolder(RecyclerViewHolder holder, int position) {

        Dataprovider dataprovider=arrayList.get(position);

        holder.imageView.setImageResource(dataprovider.getImg_res());

        holder.f_name.setText(dataprovider.getF_name());

        holder.d_name.setText(dataprovider.getD_name());

    }

    @Override

    public int getItemCount() {

        return arrayList.size();

    }

    public static class RecyclerViewHolder extends RecyclerView.ViewHolder

    {

        ImageView imageView;

        TextView f_name,d_name;

        public RecyclerViewHolder(View view)

        {

            super(view);

            imageView=(ImageView)view.findViewById(R.id.img);

            f_name=(TextView)view.findViewById(R.id.f_name);

            d_name=(TextView)view.findViewById(R.id.d_name);

        }

    }

}

BuildGRadle

apply plugin: 'com.android.application'

android {

    compileSdkVersion 25

    buildToolsVersion "25.0.2"

    defaultConfig {

        applicationId "nc.example.com.lunch"

        minSdkVersion 15

        targetSdkVersion 25

        versionCode 1

        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    }

    buildTypes {

        release {

            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

        }

    }

}

dependencies {

    compile fileTree(dir: 'libs', include: ['*.jar'])

    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {

        exclude group: 'com.android.support', module: 'support-annotations'

    })

    compile 'com.android.support:recyclerview-v7:25.2.0'

    compile 'com.android.support:cardview-v7:25.2.0'

    compile 'com.android.support:appcompat-v7:25.2.0'

    compile 'com.android.support:design:25.2.0'

    testCompile 'junit:junit:4.12'

}