Read all Contact's Phone Numbers in Android

This example is show that how to read phone contacts display them in ListView. Let's know try this example.

File Name : MainActivity,java

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package com.example.readcontacts; import java.util.ArrayList; import java.util.HashSet; import android.app.Activity; import android.app.ProgressDialog; import android.content.ContentResolver; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.provider.ContactsContract; import android.provider.ContactsContract.CommonDataKinds.Phone; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.Toast; public class MainActivity extends Activity { private ListView mListView; private ProgressDialog pDialog; private Handler updateBarHandler; StringBuffer output; ArrayList<String> contactList; Cursor cursor; String contactName,phNumber; int counter; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); pDialog = new ProgressDialog(this); pDialog.setMessage("Reading contacts..."); pDialog.setCancelable(false); pDialog.show(); mListView = (ListView) findViewById(R.id.list); updateBarHandler =new Handler(); // Since reading contacts takes more time, let's run it on a separate thread. new Thread(new Runnable() { @Override public void run() { getContacts(); } }).start(); // Set onclicklistener to the list item. mListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //TODO Do whatever you want with the list data Toast.makeText(getApplicationContext(), "item clicked : \n"+contactList.get(position), Toast.LENGTH_SHORT).show(); } }); } public void getContacts() { output = new StringBuffer(); contactList = new ArrayList<String>(); Cursor c = getContentResolver().query( ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null,"upper("+Phone.DISPLAY_NAME+ ") ASC"); while (c.moveToNext()) { contactName = c .getString(c .getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)); phNumber = c .getString(c .getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)); contactList.add(contactName + "\n" + phNumber); } c.close(); // ListView has to be updated using a ui thread runOnUiThread(new Runnable() { @Override public void run() { ArrayAdapter<String> adapter = new ArrayAdapter<String>(getApplicationContext(), R.layout.list_item, R.id.text1, contactList); mListView.setAdapter(adapter); } }); // Dismiss the progressbar after 500 millisecondds updateBarHandler.postDelayed(new Runnable() { @Override public void run() { pDialog.cancel(); } }, 500); } }

File Name : activity_main.xml

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<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" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin"> <ListView android:id="@+id/list" android:layout_width="match_parent" android:layout_height="wrap_content" android:divider="#95a5ff" android:dividerHeight="1dp" /> </RelativeLayout>

File Name : list_item.xml

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<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text1" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="5dp" android:textColor="@android:color/black" />