Get IMEI Number in Android

To get the IMEI programmatically when a button is clicked and display it in a TextView, follow these steps. Remember that accessing the IMEI is restricted on Android 10 (API level 29) and above, so you’ll need a fallback approach.

Here is a complete example:

XML Layout (activity_main.xml)

Define a Button and a TextView:

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

    <Button
        android:id="@+id/myButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Click Me" />

    <TextView
        android:id="@+id/myTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textSize="18sp"
        android:paddingTop="20dp" />

</LinearLayout>
</layout>

MainActivity.kt

package com.androindian.imeiex

// MainActivity.kt
import android.Manifest
import android.content.Context
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import android.provider.Settings
import android.telephony.TelephonyManager
import android.widget.Button
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import androidx.databinding.DataBindingUtil
import com.androindian.imeiex.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {


    var binding: ActivityMainBinding?=null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding= DataBindingUtil.setContentView(this,R.layout.activity_main)



        binding?.myButton?.setOnClickListener {
            // Check permission and get IMEI
            if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
                displayIMEI()
            } else {
                // Request permission if not granted
                ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.READ_PHONE_STATE), 1)
            }
        }
    }

    private fun displayIMEI() {
        val telephonyManager = getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
        val imei: String? = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            // Fallback for Android 10 and above (use ANDROID_ID)
            Settings.Secure.getString(contentResolver, Settings.Secure.ANDROID_ID)
        } else {
            // Get IMEI for Android 9 and below
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                telephonyManager.imei
            } else {
                TODO("VERSION.SDK_INT < O")
            }
        }

        binding?.myTextView?.text = imei ?: "Unable to retrieve IMEI"
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        if (requestCode == 1 && grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            displayIMEI()
        } else {
            binding?.myTextView?.text = "Permission denied"
        }
    }
}

build.gradle

plugins {
    alias(libs.plugins.android.application)
    alias(libs.plugins.jetbrains.kotlin.android)
}

android {
    namespace = "com.androindian.imeiex"
    compileSdk = 35

    defaultConfig {
        applicationId = "com.androindian.imeiex"
        minSdk = 24
        targetSdk = 34
        versionCode = 1
        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
    dataBinding{
        enable=true
    }
}

dependencies {

    implementation(libs.androidx.core.ktx)
    implementation(libs.androidx.appcompat)
    implementation(libs.material)
    implementation(libs.androidx.activity)
    implementation(libs.androidx.constraintlayout)
    testImplementation(libs.junit)
    androidTestImplementation(libs.androidx.junit)
    androidTestImplementation(libs.androidx.espresso.core)
}

xplanation

1. Button Click: When the “Get IMEI” button is clicked, it checks if READ_PHONE_STATE permission is granted.
2. Permission Request: If the permission is not granted, it requests it from the user.
3. Get IMEI:
   • For Android 10+, ANDROID_ID is used as a fallback since IMEI is restricted.
   • For Android 9 and below, telephonyManager.imei retrieves the actual IMEI.
4. Display IMEI: The retrieved IMEI or a fallback identifier is displayed in imeiTextView.

This setup will display the IMEI or device ID in the TextView when the button is clicked. Make sure to test on a device that can provide a proper IMEI if required.