Country Picker in Android (Java/Kotlin) code

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Country Picker in Android (Java/Kotlin)

In this tutorial, we will learn how to create Country Picker in Android (Java/Kotlin) application. The country picker dropdown with flags will allow users to search for countries, and choose a country, then selected country’s country name, country code and country phone code will be toasted.

country picker android with flag code and phone code

Implementation In Java

Step 1 : Add the necessary dependencies in the build.gradle file

First, make sure to add the necessary dependencies in the build.gradle file of your app module to include EmojiCompat support as well as gson library.

implementation 'androidx.emoji:emoji-bundled:1.1.0'
implementation 'com.google.code.gson:gson:2.8.9'

Step 2 : Add a JSON file (countries.json) to the assets folder to store the list of countries and their information.

In Android Studio, locate the “Project” pane on the left side of the window.
Navigate to the “app/src/main” directory in the “Project” pane.
Right-click on the “main” directory and select “New” -> “Directory” -> “assets” This will create an “assets” folder inside the “main” directory.
Inside the “assets” directory, right-click and select “New” -> “File”. Name the file countries.json.
Open the countries.json file and add the JSON data for your list of countries.

countries.json file

[
  {
    "name": "Afghanistan",
    "code": "AF",
    "phoneCode": "+93",
    "emoji": "🇦🇫"
  },
  {
    "name": "Albania",
    "code": "AL",
    "phoneCode": "+355",
    "emoji": "🇦🇱"
  },
  {
    "name": "Algeria",
    "code": "DZ",
    "phoneCode": "+213",
    "emoji": "🇩🇿"
  },
  {
    "name": "Andorra",
    "code": "AD",
    "phoneCode": "+376",
    "emoji": "🇦🇩"
  },
  {
    "name": "Angola",
    "code": "AO",
    "phoneCode": "+244",
    "emoji": "🇦🇴"
  },
  {
    "name": "Antigua and Barbuda",
    "code": "AG",
    "phoneCode": "+1",
    "emoji": "🇦🇬"
  },
  {
    "name": "Argentina",
    "code": "AR",
    "phoneCode": "+54",
    "emoji": "🇦🇷"
  },
  {
    "name": "Armenia",
    "code": "AM",
    "phoneCode": "+374",
    "emoji": "🇦🇲"
  },
  {
    "name": "Australia",
    "code": "AU",
    "phoneCode": "+61",
    "emoji": "🇦🇺"
  },
  {
    "name": "Austria",
    "code": "AT",
    "phoneCode": "+43",
    "emoji": "🇦🇹"
  },
  {
    "name": "Azerbaijan",
    "code": "AZ",
    "phoneCode": "+994",
    "emoji": "🇦🇿"
  },
  {
    "name": "Bahamas",
    "code": "BS",
    "phoneCode": "+1",
    "emoji": "🇧🇸"
  },
  {
    "name": "Bahrain",
    "code": "BH",
    "phoneCode": "+973",
    "emoji": "🇧🇭"
  },
  {
    "name": "Bangladesh",
    "code": "BD",
    "phoneCode": "+880",
    "emoji": "🇧🇩"
  },
  {
    "name": "Barbados",
    "code": "BB",
    "phoneCode": "+1",
    "emoji": "🇧🇧"
  },
  {
    "name": "Belarus",
    "code": "BY",
    "phoneCode": "+375",
    "emoji": "🇧🇾"
  },
  {
    "name": "Belgium",
    "code": "BE",
    "phoneCode": "+32",
    "emoji": "🇧🇪"
  },
  {
    "name": "Belize",
    "code": "BZ",
    "phoneCode": "+501",
    "emoji": "🇧🇿"
  },
  {
    "name": "Benin",
    "code": "BJ",
    "phoneCode": "+229",
    "emoji": "🇧🇯"
  },
  {
    "name": "Bhutan",
    "code": "BT",
    "phoneCode": "+975",
    "emoji": "🇧🇹"
  },
  {
    "name": "Bolivia",
    "code": "BO",
    "phoneCode": "+591",
    "emoji": "🇧🇴"
  },
  {
    "name": "Bosnia and Herzegovina",
    "code": "BA",
    "phoneCode": "+387",
    "emoji": "🇧🇦"
  },
  {
    "name": "Botswana",
    "code": "BW",
    "phoneCode": "+267",
    "emoji": "🇧🇼"
  },
  {
    "name": "Brazil",
    "code": "BR",
    "phoneCode": "+55",
    "emoji": "🇧🇷"
  },
  {
    "name": "Brunei",
    "code": "BN",
    "phoneCode": "+673",
    "emoji": "🇧🇳"
  },
  {
    "name": "Bulgaria",
    "code": "BG",
    "phoneCode": "+359",
    "emoji": "🇧🇬"
  },
  {
    "name": "Burkina Faso",
    "code": "BF",
    "phoneCode": "+226",
    "emoji": "🇧🇫"
  },
  {
    "name": "Burundi",
    "code": "BI",
    "phoneCode": "+257",
    "emoji": "🇧🇮"
  },
  {
    "name": "Cabo Verde",
    "code": "CV",
    "phoneCode": "+238",
    "emoji": "🇨🇻"
  },
  {
    "name": "Cambodia",
    "code": "KH",
    "phoneCode": "+855",
    "emoji": "🇰🇭"
  },
  {
    "name": "Cameroon",
    "code": "CM",
    "phoneCode": "+237",
    "emoji": "🇨🇲"
  },
  {
    "name": "Canada",
    "code": "CA",
    "phoneCode": "+1",
    "emoji": "🇨🇦"
  },
  {
    "name": "Central African Republic",
    "code": "CF",
    "phoneCode": "+236",
    "emoji": "🇨🇫"
  },
  {
    "name": "Chad",
    "code": "TD",
    "phoneCode": "+235",
    "emoji": "🇹🇩"
  },
  {
    "name": "Chile",
    "code": "CL",
    "phoneCode": "+56",
    "emoji": "🇨🇱"
  },
  {
    "name": "China",
    "code": "CN",
    "phoneCode": "+86",
    "emoji": "🇨🇳"
  },
  {
    "name": "Colombia",
    "code": "CO",
    "phoneCode": "+57",
    "emoji": "🇨🇴"
  },
  {
    "name": "Comoros",
    "code": "KM",
    "phoneCode": "+269",
    "emoji": "🇰🇲"
  },
  {
    "name": "Congo",
    "code": "CG",
    "phoneCode": "+242",
    "emoji": "🇨🇬"
  },
  {
    "name": "Costa Rica",
    "code": "CR",
    "phoneCode": "+506",
    "emoji": "🇨🇷"
  },
  {
    "name": "Côte d'Ivoire",
    "code": "CI",
    "phoneCode": "+225",
    "emoji": "🇨🇮"
  },
  {
    "name": "Croatia",
    "code": "HR",
    "phoneCode": "+385",
    "emoji": "🇭🇷"
  },
  {
    "name": "Cuba",
    "code": "CU",
    "phoneCode": "+53",
    "emoji": "🇨🇺"
  },
  {
    "name": "Cyprus",
    "code": "CY",
    "phoneCode": "+357",
    "emoji": "🇨🇾"
  },
  {
    "name": "Czech Republic",
    "code": "CZ",
    "phoneCode": "+420",
    "emoji": "🇨🇿"
  },
  {
    "name": "Democratic Republic of the Congo",
    "code": "CD",
    "phoneCode": "+243",
    "emoji": "🇨🇩"
  },
  {
    "name": "Denmark",
    "code": "DK",
    "phoneCode": "+45",
    "emoji": "🇩🇰"
  },
  {
    "name": "Djibouti",
    "code": "DJ",
    "phoneCode": "+253",
    "emoji": "🇩🇯"
  },
  {
    "name": "Dominica",
    "code": "DM",
    "phoneCode": "+1",
    "emoji": "🇩🇲"
  },
  {
    "name": "Dominican Republic",
    "code": "DO",
    "phoneCode": "+1",
    "emoji": "🇩🇴"
  },
  {
    "name": "Ecuador",
    "code": "EC",
    "phoneCode": "+593",
    "emoji": "🇪🇨"
  },
  {
    "name": "Egypt",
    "code": "EG",
    "phoneCode": "+20",
    "emoji": "🇪🇬"
  },
  {
    "name": "El Salvador",
    "code": "SV",
    "phoneCode": "+503",
    "emoji": "🇸🇻"
  },
  {
    "name": "Equatorial Guinea",
    "code": "GQ",
    "phoneCode": "+240",
    "emoji": "🇬🇶"
  },
  {
    "name": "Eritrea",
    "code": "ER",
    "phoneCode": "+291",
    "emoji": "🇪🇷"
  },
  {
    "name": "Estonia",
    "code": "EE",
    "phoneCode": "+372",
    "emoji": "🇪🇪"
  },
  {
    "name": "Ethiopia",
    "code": "ET",
    "phoneCode": "+251",
    "emoji": "🇪🇹"
  },
  {
    "name": "Fiji",
    "code": "FJ",
    "phoneCode": "+679",
    "emoji": "🇫🇯"
  },
  {
    "name": "Finland",
    "code": "FI",
    "phoneCode": "+358",
    "emoji": "🇫🇮"
  },
  {
    "name": "France",
    "code": "FR",
    "phoneCode": "+33",
    "emoji": "🇫🇷"
  },
  {
    "name": "Gabon",
    "code": "GA",
    "phoneCode": "+241",
    "emoji": "🇬🇦"
  },
  {
    "name": "Gambia",
    "code": "GM",
    "phoneCode": "+220",
    "emoji": "🇬🇲"
  },
  {
    "name": "Georgia",
    "code": "GE",
    "phoneCode": "+995",
    "emoji": "🇬🇪"
  },
  {
    "name": "Germany",
    "code": "DE",
    "phoneCode": "+49",
    "emoji": "🇩🇪"
  },
  {
    "name": "Ghana",
    "code": "GH",
    "phoneCode": "+233",
    "emoji": "🇬🇭"
  },
  {
    "name": "Greece",
    "code": "GR",
    "phoneCode": "+30",
    "emoji": "🇬🇷"
  },
  {
    "name": "Grenada",
    "code": "GD",
    "phoneCode": "+1",
    "emoji": "🇬🇩"
  },
  {
    "name": "Guatemala",
    "code": "GT",
    "phoneCode": "+502",
    "emoji": "🇬🇹"
  },
  {
    "name": "Guinea",
    "code": "GN",
    "phoneCode": "+224",
    "emoji": "🇬🇳"
  },
  {
    "name": "Guinea-Bissau",
    "code": "GW",
    "phoneCode": "+245",
    "emoji": "🇬🇼"
  },
  {
    "name": "Guyana",
    "code": "GY",
    "phoneCode": "+592",
    "emoji": "🇬🇾"
  },
  {
    "name": "Haiti",
    "code": "HT",
    "phoneCode": "+509",
    "emoji": "🇭🇹"
  },
  {
    "name": "Honduras",
    "code": "HN",
    "phoneCode": "+504",
    "emoji": "🇭🇳"
  },
  {
    "name": "Hungary",
    "code": "HU",
    "phoneCode": "+36",
    "emoji": "🇭🇺"
  },
  {
    "name": "Iceland",
    "code": "IS",
    "phoneCode": "+354",
    "emoji": "🇮🇸"
  },
  {
    "name": "India",
    "code": "IN",
    "phoneCode": "+91",
    "emoji": "🇮🇳"
  },
  {
    "name": "Indonesia",
    "code": "ID",
    "phoneCode": "+62",
    "emoji": "🇮🇩"
  },
  {
    "name": "Iran",
    "code": "IR",
    "phoneCode": "+98",
    "emoji": "🇮🇷"
  },
  {
    "name": "Iraq",
    "code": "IQ",
    "phoneCode": "+964",
    "emoji": "🇮🇶"
  },
  {
    "name": "Ireland",
    "code": "IE",
    "phoneCode": "+353",
    "emoji": "🇮🇪"
  },
  {
    "name": "Israel",
    "code": "IL",
    "phoneCode": "+972",
    "emoji": "🇮🇱"
  },
  {
    "name": "Italy",
    "code": "IT",
    "phoneCode": "+39",
    "emoji": "🇮🇹"
  },
  {
    "name": "Jamaica",
    "code": "JM",
    "phoneCode": "+1",
    "emoji": "🇯🇲"
  },
  {
    "name": "Japan",
    "code": "JP",
    "phoneCode": "+81",
    "emoji": "🇯🇵"
  },
  {
    "name": "Jordan",
    "code": "JO",
    "phoneCode": "+962",
    "emoji": "🇯🇴"
  },
  {
    "name": "Kazakhstan",
    "code": "KZ",
    "phoneCode": "+7",
    "emoji": "🇰🇿"
  },
  {
    "name": "Kenya",
    "code": "KE",
    "phoneCode": "+254",
    "emoji": "🇰🇪"
  },
  {
    "name": "Kiribati",
    "code": "KI",
    "phoneCode": "+686",
    "emoji": "🇰🇮"
  },
  {
    "name": "Kuwait",
    "code": "KW",
    "phoneCode": "+965",
    "emoji": "🇰🇼"
  },
  {
    "name": "Kyrgyzstan",
    "code": "KG",
    "phoneCode": "+996",
    "emoji": "🇰🇬"
  },
  {
    "name": "Laos",
    "code": "LA",
    "phoneCode": "+856",
    "emoji": "🇱🇦"
  },
  {
    "name": "Latvia",
    "code": "LV",
    "phoneCode": "+371",
    "emoji": "🇱🇻"
  },
  {
    "name": "Lebanon",
    "code": "LB",
    "phoneCode": "+961",
    "emoji": "🇱🇧"
  },
  {
    "name": "Lesotho",
    "code": "LS",
    "phoneCode": "+266",
    "emoji": "🇱🇸"
  },
  {
    "name": "Liberia",
    "code": "LR",
    "phoneCode": "+231",
    "emoji": "🇱🇷"
  },
  {
    "name": "Libya",
    "code": "LY",
    "phoneCode": "+218",
    "emoji": "🇱🇾"
  },
  {
    "name": "Liechtenstein",
    "code": "LI",
    "phoneCode": "+423",
    "emoji": "🇱🇮"
  },
  {
    "name": "Lithuania",
    "code": "LT",
    "phoneCode": "+370",
    "emoji": "🇱🇹"
  },
  {
    "name": "Luxembourg",
    "code": "LU",
    "phoneCode": "+352",
    "emoji": "🇱🇺"
  },
  {
    "name": "Macedonia",
    "code": "MK",
    "phoneCode": "+389",
    "emoji": "🇲🇰"
  },
  {
    "name": "Madagascar",
    "code": "MG",
    "phoneCode": "+261",
    "emoji": "🇲🇬"
  },
  {
    "name": "Malawi",
    "code": "MW",
    "phoneCode": "+265",
    "emoji": "🇲🇼"
  },
  {
    "name": "Malaysia",
    "code": "MY",
    "phoneCode": "+60",
    "emoji": "🇲🇾"
  },
  {
    "name": "Maldives",
    "code": "MV",
    "phoneCode": "+960",
    "emoji": "🇲🇻"
  },
  {
    "name": "Mali",
    "code": "ML",
    "phoneCode": "+223",
    "emoji": "🇲🇱"
  },
  {
    "name": "Malta",
    "code": "MT",
    "phoneCode": "+356",
    "emoji": "🇲🇹"
  },
  {
    "name": "Marshall Islands",
    "code": "MH",
    "phoneCode": "+692",
    "emoji": "🇲🇭"
  },
  {
    "name": "Mauritania",
    "code": "MR",
    "phoneCode": "+222",
    "emoji": "🇲🇷"
  },
  {
    "name": "Mauritius",
    "code": "MU",
    "phoneCode": "+230",
    "emoji": "🇲🇺"
  },
  {
    "name": "Mexico",
    "code": "MX",
    "phoneCode": "+52",
    "emoji": "🇲🇽"
  },
  {
    "name": "Micronesia",
    "code": "FM",
    "phoneCode": "+691",
    "emoji": "🇫🇲"
  },
  {
    "name": "Moldova",
    "code": "MD",
    "phoneCode": "+373",
    "emoji": "🇲🇩"
  },
  {
    "name": "Monaco",
    "code": "MC",
    "phoneCode": "+377",
    "emoji": "🇲🇨"
  },
  {
    "name": "Mongolia",
    "code": "MN",
    "phoneCode": "+976",
    "emoji": "🇲🇳"
  },
  {
    "name": "Montenegro",
    "code": "ME",
    "phoneCode": "+382",
    "emoji": "🇲🇪"
  },
  {
    "name": "Morocco",
    "code": "MA",
    "phoneCode": "+212",
    "emoji": "🇲🇦"
  },
  {
    "name": "Mozambique",
    "code": "MZ",
    "phoneCode": "+258",
    "emoji": "🇲🇿"
  },
  {
    "name": "Myanmar",
    "code": "MM",
    "phoneCode": "+95",
    "emoji": "🇲🇲"
  },
  {
    "name": "Namibia",
    "code": "NA",
    "phoneCode": "+264",
    "emoji": "🇳🇦"
  },
  {
    "name": "Nauru",
    "code": "NR",
    "phoneCode": "+674",
    "emoji": "🇳🇷"
  },
  {
    "name": "Nepal",
    "code": "NP",
    "phoneCode": "+977",
    "emoji": "🇳🇵"
  },
  {
    "name": "Netherlands",
    "code": "NL",
    "phoneCode": "+31",
    "emoji": "🇳🇱"
  },
  {
    "name": "New Zealand",
    "code": "NZ",
    "phoneCode": "+64",
    "emoji": "🇳🇿"
  },
  {
    "name": "Nicaragua",
    "code": "NI",
    "phoneCode": "+505",
    "emoji": "🇳🇮"
  },
  {
    "name": "Niger",
    "code": "NE",
    "phoneCode": "+227",
    "emoji": "🇳🇪"
  },
  {
    "name": "Nigeria",
    "code": "NG",
    "phoneCode": "+234",
    "emoji": "🇳🇬"
  },
  {
    "name": "North Korea",
    "code": "KP",
    "phoneCode": "+850",
    "emoji": "🇰🇵"
  },
  {
    "name": "Norway",
    "code": "NO",
    "phoneCode": "+47",
    "emoji": "🇳🇴"
  },
  {
    "name": "Oman",
    "code": "OM",
    "phoneCode": "+968",
    "emoji": "🇴🇲"
  },
  {
    "name": "Pakistan",
    "code": "PK",
    "phoneCode": "+92",
    "emoji": "🇵🇰"
  },
  {
    "name": "Palau",
    "code": "PW",
    "phoneCode": "+680",
    "emoji": "🇵🇼"
  },
  {
    "name": "Palestine",
    "code": "PS",
    "phoneCode": "+970",
    "emoji": "🇵🇸"
  },
  {
    "name": "Panama",
    "code": "PA",
    "phoneCode": "+507",
    "emoji": "🇵🇦"
  },
  {
    "name": "Papua New Guinea",
    "code": "PG",
    "phoneCode": "+675",
    "emoji": "🇵🇬"
  },
  {
    "name": "Paraguay",
    "code": "PY",
    "phoneCode": "+595",
    "emoji": "🇵🇾"
  },
  {
    "name": "Peru",
    "code": "PE",
    "phoneCode": "+51",
    "emoji": "🇵🇪"
  },
  {
    "name": "Philippines",
    "code": "PH",
    "phoneCode": "+63",
    "emoji": "🇵🇭"
  },
  {
    "name": "Poland",
    "code": "PL",
    "phoneCode": "+48",
    "emoji": "🇵🇱"
  },
  {
    "name": "Portugal",
    "code": "PT",
    "phoneCode": "+351",
    "emoji": "🇵🇹"
  },
  {
    "name": "Qatar",
    "code": "QA",
    "phoneCode": "+974",
    "emoji": "🇶🇦"
  },
  {
    "name": "Republic of Kosovo",
    "code": "XK",
    "phoneCode": "+383",
    "emoji": "🇽🇰"
  },
  {
    "name": "Romania",
    "code": "RO",
    "phoneCode": "+40",
    "emoji": "🇷🇴"
  },
  {
    "name": "Russia",
    "code": "RU",
    "phoneCode": "+7",
    "emoji": "🇷🇺"
  },
  {
    "name": "Rwanda",
    "code": "RW",
    "phoneCode": "+250",
    "emoji": "🇷🇼"
  },
  {
    "name": "Saint Kitts and Nevis",
    "code": "KN",
    "phoneCode": "+1",
    "emoji": "🇰🇳"
  },
  {
    "name": "Saint Lucia",
    "code": "LC",
    "phoneCode": "+1",
    "emoji": "🇱🇨"
  },
  {
    "name": "Saint Vincent and the Grenadines",
    "code": "VC",
    "phoneCode": "+1",
    "emoji": "🇻🇨"
  },
  {
    "name": "Samoa",
    "code": "WS",
    "phoneCode": "+685",
    "emoji": "🇼🇸"
  },
  {
    "name": "San Marino",
    "code": "SM",
    "phoneCode": "+378",
    "emoji": "🇸🇲"
  },
  {
    "name": "São Tomé and Príncipe",
    "code": "ST",
    "phoneCode": "+239",
    "emoji": "🇸🇹"
  },
  {
    "name": "Saudi Arabia",
    "code": "SA",
    "phoneCode": "+966",
    "emoji": "🇸🇦"
  },
  {
    "name": "Senegal",
    "code": "SN",
    "phoneCode": "+221",
    "emoji": "🇸🇳"
  },
  {
    "name": "Serbia",
    "code": "RS",
    "phoneCode": "+381",
    "emoji": "🇷🇸"
  },
  {
    "name": "Seychelles",
    "code": "SC",
    "phoneCode": "+248",
    "emoji": "🇸🇨"
  },
  {
    "name": "Sierra Leone",
    "code": "SL",
    "phoneCode": "+232",
    "emoji": "🇸🇱"
  },
  {
    "name": "Singapore",
    "code": "SG",
    "phoneCode": "+65",
    "emoji": "🇸🇬"
  },
  {
    "name": "Slovakia",
    "code": "SK",
    "phoneCode": "+421",
    "emoji": "🇸🇰"
  },
  {
    "name": "Slovenia",
    "code": "SI",
    "phoneCode": "+386",
    "emoji": "🇸🇮"
  },
  {
    "name": "Solomon Islands",
    "code": "SB",
    "phoneCode": "+677",
    "emoji": "🇸🇧"
  },
  {
    "name": "Somalia",
    "code": "SO",
    "phoneCode": "+252",
    "emoji": "🇸🇴"
  },
  {
    "name": "South Africa",
    "code": "ZA",
    "phoneCode": "+27",
    "emoji": "🇿🇦"
  },
  {
    "name": "South Korea",
    "code": "KR",
    "phoneCode": "+82",
    "emoji": "🇰🇷"
  },
  {
    "name": "South Sudan",
    "code": "SS",
    "phoneCode": "+211",
    "emoji": "🇸🇸"
  },
  {
    "name": "Spain",
    "code": "ES",
    "phoneCode": "+34",
    "emoji": "🇪🇸"
  },
  {
    "name": "Sri Lanka",
    "code": "LK",
    "phoneCode": "+94",
    "emoji": "🇱🇰"
  },
  {
    "name": "Sudan",
    "code": "SD",
    "phoneCode": "+249",
    "emoji": "🇸🇩"
  },
  {
    "name": "Suriname",
    "code": "SR",
    "phoneCode": "+597",
    "emoji": "🇸🇷"
  },
  {
    "name": "Swaziland",
    "code": "SZ",
    "phoneCode": "+268",
    "emoji": "🇸🇿"
  },
  {
    "name": "Sweden",
    "code": "SE",
    "phoneCode": "+46",
    "emoji": "🇸🇪"
  },
  {
    "name": "Switzerland",
    "code": "CH",
    "phoneCode": "+41",
    "emoji": "🇨🇭"
  },
  {
    "name": "Syria",
    "code": "SY",
    "phoneCode": "+963",
    "emoji": "🇸🇾"
  },
  {
    "name": "Taiwan",
    "code": "TW",
    "phoneCode": "+886",
    "emoji": "🇹🇼"
  },
  {
    "name": "Tajikistan",
    "code": "TJ",
    "phoneCode": "+992",
    "emoji": "🇹🇯"
  },
  {
    "name": "Tanzania",
    "code": "TZ",
    "phoneCode": "+255",
    "emoji": "🇹🇿"
  },
  {
    "name": "Thailand",
    "code": "TH",
    "phoneCode": "+66",
    "emoji": "🇹🇭"
  },
  {
    "name": "Timor-Leste",
    "code": "TL",
    "phoneCode": "+670",
    "emoji": "🇹🇱"
  },
  {
    "name": "Togo",
    "code": "TG",
    "phoneCode": "+228",
    "emoji": "🇹🇬"
  },
  {
    "name": "Tonga",
    "code": "TO",
    "phoneCode": "+676",
    "emoji": "🇹🇴"
  },
  {
    "name": "Trinidad and Tobago",
    "code": "TT",
    "phoneCode": "+1",
    "emoji": "🇹🇹"
  },
  {
    "name": "Tunisia",
    "code": "TN",
    "phoneCode": "+216",
    "emoji": "🇹🇳"
  },
  {
    "name": "Turkey",
    "code": "TR",
    "phoneCode": "+90",
    "emoji": "🇹🇷"
  },
  {
    "name": "Turkmenistan",
    "code": "TM",
    "phoneCode": "+993",
    "emoji": "🇹🇲"
  },
  {
    "name": "Tuvalu",
    "code": "TV",
    "phoneCode": "+688",
    "emoji": "🇹🇻"
  },
  {
    "name": "Uganda",
    "code": "UG",
    "phoneCode": "+256",
    "emoji": "🇺🇬"
  },
  {
    "name": "Ukraine",
    "code": "UA",
    "phoneCode": "+380",
    "emoji": "🇺🇦"
  },
  {
    "name": "United Arab Emirates",
    "code": "AE",
    "phoneCode": "+971",
    "emoji": "🇦🇪"
  },
  {
    "name": "United Kingdom",
    "code": "UK",
    "phoneCode": "+44",
    "emoji": "🇬🇧"
  },
  {
    "name": "United States",
    "code": "US",
    "phoneCode": "+1",
    "emoji": "🇺🇸"
  },
  {
    "name": "Uruguay",
    "code": "UY",
    "phoneCode": "+598",
    "emoji": "🇺🇾"
  },
  {
    "name": "Uzbekistan",
    "code": "UZ",
    "phoneCode": "+998",
    "emoji": "🇺🇿"
  },
  {
    "name": "Vanuatu",
    "code": "VU",
    "phoneCode": "+678",
    "emoji": "🇻🇺"
  },
  {
    "name": "Vatican City",
    "code": "VA",
    "phoneCode": "+39",
    "emoji": "🇻🇦"
  },
  {
    "name": "Venezuela",
    "code": "VE",
    "phoneCode": "+58",
    "emoji": "🇻🇪"
  },
  {
    "name": "Vietnam",
    "code": "VN",
    "phoneCode": "+84",
    "emoji": "🇻🇳"
  },
  {
    "name": "Yemen",
    "code": "YE",
    "phoneCode": "+967",
    "emoji": "🇾🇪"
  },
  {
    "name": "Zambia",
    "code": "ZM",
    "phoneCode": "+260",
    "emoji": "🇿🇲"
  },
  {
    "name": "Zimbabwe",
    "code": "ZW",
    "phoneCode": "+263",
    "emoji": "🇿🇼"
  }
]

Step 3 : Create Country class

Create a new Java class Country.java to represent the Country model with fields for name, code, phoneCode, and emoji.

package com.example.myapplication;

import android.os.Parcel;
import android.os.Parcelable;

public class Country implements Parcelable {
    private String name;
    private String code;
    private String phoneCode;
    private String emoji;

    public Country(String name, String code, String phoneCode, String emoji) {
        this.name = name;
        this.code = code;
        this.phoneCode = phoneCode;
        this.emoji = emoji;
    }

    public String getName() {
        return name;
    }

    public String getCode() {
        return code;
    }

    public String getPhoneCode() {
        return phoneCode;
    }

    public String getEmoji() {
        return emoji;
    }

    // Implement Parcelable methods to allow passing Country objects between activities
    protected Country(Parcel in) {
        name = in.readString();
        code = in.readString();
        phoneCode = in.readString();
        emoji = in.readString();
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(name);
        dest.writeString(code);
        dest.writeString(phoneCode);
        dest.writeString(emoji);
    }

    @Override
    public int describeContents() {
        return 0;
    }

    public static final Creator<Country> CREATOR = new Creator<Country>() {
        @Override
        public Country createFromParcel(Parcel in) {
            return new Country(in);
        }

        @Override
        public Country[] newArray(int size) {
            return new Country[size];
        }
    };
}

Step 4: Create XML layout for country picker dialog

Create XML layout file dialog_country_picker.xml inside the res/layout folder to define the layout for the country picker dialog. Add below code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <AutoCompleteTextView
        android:id="@+id/searchEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Search Country"
        android:inputType="text"
        android:maxLines="1" />

    <ListView
        android:id="@+id/countryListView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

Step 5: Implement the MainActivity class with code to display the country picker dialog

package com.example.myapplication;

import android.app.AlertDialog;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.emoji.bundled.BundledEmojiCompatConfig;
import androidx.emoji.text.EmojiCompat;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private List<Country> allCountries;
    private List<Country> filteredCountries;
    private CountryAdapter adapter;

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

        // Initialize EmojiCompat with bundled font support (no need for a FontRequest)
        EmojiCompat.Config config = new BundledEmojiCompatConfig(this);
        EmojiCompat.init(config);

        allCountries = getAllCountries();
        filteredCountries = new ArrayList<>(allCountries);

        adapter = new CountryAdapter(filteredCountries);

        // Click listener for the "Select Country" button
        findViewById(R.id.selectCountryButton).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showCountryPickerDialog();
            }
        });
    }

    AlertDialog dialog;

    // Method to show the country picker dialog
    private void showCountryPickerDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Select a Country");

        // Inflate the dialog view layout
        View dialogView = LayoutInflater.from(this).inflate(R.layout.dialog_country_picker, null);
        AutoCompleteTextView searchEditText = dialogView.findViewById(R.id.searchEditText);
        ListView countryListView = dialogView.findViewById(R.id.countryListView);

        countryListView.setAdapter(adapter);

        // Click listener for the country list items
        countryListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
                Country selectedCountry = filteredCountries.get(position);
                // Handle the selected country here (you can do whatever you want with it)
                // For example, you can display it in a TextView or save it to a variable.
                Toast.makeText(MainActivity.this,
                        "Selected Country: " + selectedCountry.getName()
                                + "\nCountry Code: " + selectedCountry.getCode()
                                + "\nPhone Code: " + selectedCountry.getPhoneCode(),
                        Toast.LENGTH_SHORT).show();

                // Close the dialog
                countryListView.clearFocus();
                searchEditText.clearFocus();
                dialog.dismiss();
            }
        });

        // TextWatcher for filtering countries based on user input
        searchEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                filterCountries(charSequence.toString());
            }

            @Override
            public void afterTextChanged(Editable editable) {
            }
        });

        builder.setView(dialogView);
        builder.setNegativeButton("Cancel", null);

        dialog = builder.create();
        dialog.show();

        // Clear the search bar before opening the dialog again
        searchEditText.setText("");
    }

    // Method to filter the countries based on the search query
    private void filterCountries(String searchText) {
        filteredCountries.clear();
        for (Country country : allCountries) {
            if (country.getName().toLowerCase().contains(searchText.toLowerCase())) {
                filteredCountries.add(country);
            }
        }
        adapter.notifyDataSetChanged();
    }

    // Method to get the list of all countries from a JSON file
    private List<Country> getAllCountries() {
        List<Country> countries = new ArrayList<>();
        try {
            InputStream inputStream = getAssets().open("countries.json");
            int size = inputStream.available();
            byte[] buffer = new byte[size];
            inputStream.read(buffer);
            inputStream.close();

            String json = new String(buffer, "UTF-8");
            Gson gson = new Gson();
            Type listType = new TypeToken<List<Country>>() {}.getType();
            countries = gson.fromJson(json, listType);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return countries;
    }

    // Custom ArrayAdapter for displaying countries in the ListView
    private class CountryAdapter extends ArrayAdapter<Country> {

        CountryAdapter(List<Country> countries) {
            super(MainActivity.this, android.R.layout.simple_list_item_1, countries);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (convertView == null) {
                convertView = LayoutInflater.from(getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
            }

            TextView textView = convertView.findViewById(android.R.id.text1);
            Country country = getItem(position);
            if (country != null) {
                // Use EmojiCompat to display the flag Emoji
                CharSequence emoji = EmojiCompat.get().process(country.getEmoji());
                String countryText = emoji.toString() + " " + country.getName();
                textView.setText(countryText);
            }
            return convertView;
        }
    }

}

Step 6: Creating the MainActivity XML layout i.e activity_main.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="match_parent"
    android:padding="16dp">

    <Button
        android:id="@+id/selectCountryButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Select Country"
        android:layout_centerInParent="true" />

</RelativeLayout>

Implementation In Kotlin

please follow step 1 and 2 from above