SMS Intent - Android Studio - Kotlin

Open SMS Intent with Phone Number using Android Studio and Kotlin

Learn how to create a simple SMS sending feature in Android using Android Studio with Kotlin. This tutorial shows how to build a clean UI with an input field for phone numbers and a button that opens the SMS app with the entered number. A step-by-step guide with Kotlin code for beginners and developers moving from XML layouts to Compose.

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Code Snippet:

val intent = Intent(Intent.ACTION_VIEW, Uri.parse("sms:" + Uri.encode(phone)))
startActivity(intent)

Full Example:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="10dp"
    tools:context=".MainActivity1">

    <!--EditText: Input Phone Number-->
    <EditText
        android:id="@+id/phoneEt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Phone Number"
        android:inputType="phone" />

    <!--MaterialButton: Click to open sms intent-->
    <com.google.android.material.button.MaterialButton
        android:id="@+id/smsBtn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minHeight="60dp"
        android:text="SMS"
        app:cornerRadius="8dp" />

</LinearLayout>

MainActivity.java

package com.technifysoft.myapplication

import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.widget.EditText
import androidx.appcompat.app.AppCompatActivity
import com.google.android.material.button.MaterialButton

class MainActivity1 : AppCompatActivity() {

    private lateinit var phoneEt: EditText
    private lateinit var smsBtn: MaterialButton

    public override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main1)

        //init UI Views
        phoneEt = findViewById(R.id.phoneEt)
        smsBtn = findViewById(R.id.smsBtn)

        //handle smsBtn click
        smsBtn.setOnClickListener { openSmsIntent() }
    }

    private fun openSmsIntent() {
        //input phone number
        val phone = phoneEt.text.toString().trim { it <= ' ' }

        //open call/dialer intent
        val intent = Intent(Intent.ACTION_VIEW, Uri.parse("sms:" + Uri.encode(phone)))
        startActivity(intent)
    }

}

Output: