The phone dialer is an activity in the android application that is used to make a phone call within the android device. The dialer activity is used to dial a phone number and make a call. In this article, we will take a look at How to open a dialer in the android application through Intent in our android application using Jetpack Compose. A sample video is given below to get an idea about what we are going to do in this article.
Step By Step Implementation
Step 1: Create a New Project in Android Studio
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. While choosing the template, select Empty Compose Activity. If you do not find this template, try upgrading the Android Studio to the latest version. We demonstrated the application in Kotlin, so make sure you select Kotlin as the primary language while creating a New Project.
Step 2: Adding a new color to the Color.kt file
Navigate to app > java > your app’s package name > ui.theme > Color.kt file and add the below code to it.
package com.example.testproject.ui.theme
import androidx.compose.ui.graphics.Color
val Purple200 = Color( 0xFF0F9D58 )
val Purple500 = Color( 0xFF0F9D58 )
val Purple700 = Color( 0xFF3700B3 )
val Teal200 = Color( 0xFF03DAC5 )
// on below line we are adding different colors val greenColor = Color( 0xFF0F9D58 )
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Step 3: Working with the MainActivity.kt file
Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.
package com.example.testproject
import android.annotation.SuppressLint
import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.util.Log
import android.widget.Toast
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.*
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.input.TextFieldValue
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.core.content.ContextCompat.startActivity
import com.example.testproject.ui.theme.TestProjectTheme
import com.example.testproject.ui.theme.greenColor
class MainActivity : ComponentActivity() {
@SuppressLint ( "UnusedMaterialScaffoldPaddingParameter" )
override fun onCreate(savedInstanceState: Bundle?) {
super .onCreate(savedInstanceState)
setContent {
TestProjectTheme {
// on below line we are specifying
// background color for our application
Surface(
modifier = Modifier.fillMaxSize(),
color = MaterialTheme.colors.background
) {
// on below line we are specifying
// theme as scaffold.
Scaffold(
// in scaffold we are specifying top bar.
topBar = {
// inside top bar we are specifying
// background color.
TopAppBar(backgroundColor = greenColor,
// along with that we are specifying
// title for our top bar.
title = {
// in the top bar we are specifying
// title as a text
Text(
// on below line we are specifying
// text to display in top app bar.
text = "GFG" ,
color = Color.White,
// on below line we are specifying
// modifier to fill max width.
modifier = Modifier.fillMaxWidth(),
// on below line we are
// specifying text alignment.
textAlign = TextAlign.Center,
// on below line we are
// specifying color for our text.
)
}
)
}
) {
// on below line we are calling open
// dialer method to open dialer.
openDialer()
}
}
}
}
}
} @Composable fun openDialer() { // in the below line, we are
// creating variables for URL
val phoneNumber = remember {
mutableStateOf(TextFieldValue())
}
// on below line we are creating
// a variable for a context
val ctx = LocalContext.current
// on below line we are creating a column
Column(
// on below line we are specifying modifier
// and setting max height and max width
// for our column
modifier = Modifier
.fillMaxSize()
.fillMaxHeight()
.fillMaxWidth()
// on below line we are
// adding padding for our column
.padding( 5 .dp),
// on below line we are specifying horizontal
// and vertical alignment for our column
horizontalAlignment = Alignment.CenterHorizontally,
verticalArrangement = Arrangement.Center
) {
// in the below line, we are creating a
// text field for getting URL from user.
TextField(
// on below line we are specifying value
// for our text field.
value = phoneNumber.value,
// on below line we are adding on value
// change for text field.
onValueChange = { phoneNumber.value = it },
// on below line we are adding place holder as text
placeholder = { Text(text = "Enter your phone number" ) },
// on below line we are adding modifier to it
// and adding padding to it and filling max width
modifier = Modifier
.padding( 16 .dp)
.fillMaxWidth(),
// on below line we are adding text style
// specifying color and font size to it.
textStyle = TextStyle(color = Color.Black, fontSize = 15 .sp),
// on below line we are adding single line to it.
singleLine = true ,
)
// on below line adding a spacer.
Spacer(modifier = Modifier.height( 20 .dp))
// on below line adding a button to open URL
Button(onClick = {
// on below line we are opening the dialer of our
// phone and passing phone number.
// Use format with "tel:" and phoneNumber created is
// stored in u.
val u = Uri.parse( "tel:" + phoneNumber.value.text)
// Create the intent and set the data for the
// intent as the phone number.
val i = Intent(Intent.ACTION_DIAL, u)
try {
// Launch the Phone app's dialer with a phone
// number to dial a call.
ctx.startActivity(i)
} catch (s: SecurityException) {
// show() method display the toast with
// exception message.
Toast.makeText(ctx, "An error occurred" , Toast.LENGTH_LONG)
.show()
}
}) {
// on below line creating a text for our button.
Text(
// on below line adding a text ,
// padding, color and font size.
text = "Dial" ,
modifier = Modifier.padding( 10 .dp),
color = Color.White,
fontSize = 15 .sp
)
}
}
} |
Now run your application to see the output of it.
Output: