Retrieving a List of Contacts in Android Example

In order to access contacts in Android we need to declare a permission in AndroidManifest.xml file

<uses-permission android:name="android.permission.READ_CONTACTS"/>

To use RecyclerView in Android you need to add following dependencies in build.gradle file

compile 'com.android.support:recyclerview-v7:23.0.1'

In this example we need to create

    Activity

         AllContacts.java: contains java file and xml layout file
             AllContacts.java: retrieve all contacts and add it to ArrayList and pass to Adapter
             activity_all_contacts.xml: add a recyclerView to display a list of contacts

    Adapter

        AllUsersAdapter.java
            Create a constructor to receive List of Users passed by the Activity Class

            Create a class ContactViewHolder.java that will extends RecyclerView.ViewHolder
       
            Implement RecyclerView.Adapter and override three methods:
                onCreateViewHolder(…)
                onBindViewHolder (…)
                getItemCount(…)

    Layout

        single_contact_view.xml: for single contact layout inside RecyclerView

Retrieving a List of Contacts in Android

Source Code:

activity_all_contacts.xml

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".AllContacts">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rvContacts"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </android.support.v7.widget.RecyclerView>

</RelativeLayout>

 
single_contact_view.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:background="#dddddd">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <ImageView
            android:id="@+id/ivContactImage"
            android:layout_width="55dp"
            android:layout_height="55dp"
            android:layout_marginLeft="10dp"
            android:layout_marginStart="10dp"
            android:src="@drawable/ic_action_person"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:gravity="center_vertical">

            <TextView
                android:id="@+id/tvContactName"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginStart="10dp"
                android:textSize="16sp"
                android:textColor="@android:color/primary_text_light"
                android:text="Name"/>

            <TextView
                android:id="@+id/tvPhoneNumber"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="10dp"
                android:layout_marginStart="10dp"
                android:textSize="14sp"
                android:textColor="@android:color/primary_text_light"
                android:text="Phone"/>

        </LinearLayout>

    </LinearLayout>

</RelativeLayout>

 
AllContactsAdapter.java

package com.sonevalley.sushil.retrievingcontacts;

import android.content.Context;
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.List;

public class AllContactsAdapter extends RecyclerView.Adapter<AllContactsAdapter.ContactViewHolder>{

    private List<ContactVO> contactVOList;
    private Context mContext;
    public AllContactsAdapter(List<ContactVO> contactVOList, Context mContext){
        this.contactVOList = contactVOList;
        this.mContext = mContext;
    }

    @Override
    public ContactViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(mContext).inflate(R.layout.single_contact_view, null);
        ContactViewHolder contactViewHolder = new ContactViewHolder(view);
        return contactViewHolder;
    }

    @Override
    public void onBindViewHolder(ContactViewHolder holder, int position) {
        ContactVO contactVO = contactVOList.get(position);
        holder.tvContactName.setText(contactVO.getContactName());
        holder.tvPhoneNumber.setText(contactVO.getContactNumber());
    }

    @Override
    public int getItemCount() {
        return contactVOList.size();
    }

    public static class ContactViewHolder extends RecyclerView.ViewHolder{

        ImageView ivContactImage;
        TextView tvContactName;
        TextView tvPhoneNumber;

        public ContactViewHolder(View itemView) {
            super(itemView);
            ivContactImage = (ImageView) itemView.findViewById(R.id.ivContactImage);
            tvContactName = (TextView) itemView.findViewById(R.id.tvContactName);
            tvPhoneNumber = (TextView) itemView.findViewById(R.id.tvPhoneNumber);
        }
    }
}

 
AllContacts.java

package com.sonevalley.sushil.retrievingcontacts;

import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;

public class AllContacts extends AppCompatActivity {

    RecyclerView rvContacts;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_all_contacts);

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

        getAllContacts();
    }

    private void getAllContacts() {
        List<ContactVO> contactVOList = new ArrayList();
        ContactVO contactVO;

        ContentResolver contentResolver = getContentResolver();
        Cursor cursor = contentResolver.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " ASC");
        if (cursor.getCount() > 0) {
            while (cursor.moveToNext()) {

                int hasPhoneNumber = Integer.parseInt(cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER)));
                if (hasPhoneNumber > 0) {
                    String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
                    String name = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));

                    contactVO = new ContactVO();
                    contactVO.setContactName(name);

                    Cursor phoneCursor = contentResolver.query(
                            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                            null,
                            ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
                            new String[]{id},
                            null);
                    if (phoneCursor.moveToNext()) {
                        String phoneNumber = phoneCursor.getString(phoneCursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                        contactVO.setContactNumber(phoneNumber);
                    }

                    phoneCursor.close();

                    Cursor emailCursor = contentResolver.query(
                            ContactsContract.CommonDataKinds.Email.CONTENT_URI,
                            null,
                            ContactsContract.CommonDataKinds.Email.CONTACT_ID + " = ?",
                            new String[]{id}, null);
                    while (emailCursor.moveToNext()) {
                        String emailId = emailCursor.getString(emailCursor.getColumnIndex(ContactsContract.CommonDataKinds.Email.DATA));
                    }
                    contactVOList.add(contactVO);
                }
            }

            AllContactsAdapter contactAdapter = new AllContactsAdapter(contactVOList, getApplicationContext());
            rvContacts.setLayoutManager(new LinearLayoutManager(this));
            rvContacts.setAdapter(contactAdapter);
        }
    }
}

ContactVO.java

package com.sushil.tech.retrievingcontacts;

public class ContactVO {
    private String ContactImage;
    private String ContactName;
    private String ContactNumber;

    public String getContactImage() {
        return ContactImage;
    }

    public void setContactImage(String contactImage) {
        this.ContactImage = ContactImage;
    }

    public String getContactName() {
        return ContactName;
    }

    public void setContactName(String contactName) {
        ContactName = contactName;
    }

    public String getContactNumber() {
        return ContactNumber;
    }

    public void setContactNumber(String contactNumber) {
        ContactNumber = contactNumber;
    }
}

Screen Preview:

Retrieving a List of Contacts in Android

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