Dialer Intent - Android Studio - Compose

How to launch dialer pad with a specific phone number using Intent

Learn how to easily open the phone dialer or make a direct call in your Android app using Kotlin. This step-by-step guide explains how to use Intent.ACTION_DIAL and Intent.ACTION_CALL, request runtime permissions, and write clean Kotlin code in Android Studio. Ideal for beginners and professional Android developers looking to integrate calling features into their apps.

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Code:

MainActivity.kt

package com.technifysoft.myapplication

import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.widget.Toast
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material3.Button
import androidx.compose.material3.OutlinedTextField
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.technifysoft.myapplication.ui.theme.MyApplicationTheme

class MainActivityCompose : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            MainUi()
        }
    }
}

@Composable
fun MainUi() {
    val context = LocalContext.current

    var number by remember { mutableStateOf("") }

    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(20.dp),
        verticalArrangement = Arrangement.Center,
        horizontalAlignment = Alignment.CenterHorizontally
    ) {

        Text(
            modifier = Modifier.fillMaxWidth(),
            text = "Dialer Intent",
            style = TextStyle(textAlign = TextAlign.Center),
            fontWeight = FontWeight.Bold
        )

        Spacer(modifier = Modifier.height(10.dp))

        OutlinedTextField(
            modifier = Modifier.fillMaxWidth(),
            value = number, onValueChange = { number = it },
            placeholder = { Text(text = "Enter Number/Code...") },
            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Phone)
        )

        Spacer(modifier = Modifier.height(10.dp))

        Button(
            modifier = Modifier,
            onClick = {
                if (number.isEmpty()){
                    Toast.makeText(context, "Enter Number...!", Toast.LENGTH_SHORT).show()
                } else {
                    val intent = Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + Uri.encode(number)))
                    context.startActivity(intent)
                }
            }) {
            Text(text = "Dial")
        }
    }

}


/**
 * GreetingPreview is a composable function for previewing the MainUI in Android Studio.
 * It is annotated with @Preview to enable live preview.
 *
 */
@Preview(showBackground = true)
@Composable
private fun GreetingPreview() {
    MyApplicationTheme {
        MainUi()
    }
}

Screenshots: