Java tutorial
//package com.java2s; //License from project: Open Source License import android.content.Context; import android.provider.ContactsContract.CommonDataKinds.Phone; import android.database.Cursor; public class Main { public static boolean isPhoneNumberInContactList(Context context, String phoneNumber) { Cursor c = context.getContentResolver().query(Phone.CONTENT_URI, new String[] { Phone.DATA4 }, Phone.DATA4 + " = ? or " + Phone.DATA1 + " = ?", new String[] { phoneNumber, phoneNumber }, null); boolean result = c.moveToFirst(); c.close(); return result; } }