Last updated Dec 16, 2021 In this android example, we will see how to send message from app in Android Studio by using Kotlin Language.
Implementation:
Create a new Project in android studio.
| Go to File > New > New Project > Empty Activity > Next > Enter Name > Select Language Kotlin > Finish |
Go to activity_message.xml file and add the following code
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:padding="20dp"
android:orientation="vertical"
tools:context=".MessageActivity">
<EditText
android:id="@+id/etPhone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter mobile number" />
<EditText
android:id="@+id/etMessage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:hint="Enter your message" />
<Button
android:id="@+id/sendSMS"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="Send Message" />
</LinearLayout>
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Add Send SMS permission in AndroidManifest.xml file
Open MessageActivity.kt file and add the following code below setContentView().
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val btn = findViewById(R.id.sendSMS)
val phoneNo = findViewById(R.id.etPhone)
val message = findViewById(R.id.etMessage)
val permissionRequest = 101
fun myMessage() {
val myNumber: String = phoneNo.text.toString().trim()
val myMsg: String = message.text.toString().trim()
if (myNumber == "" || myMsg == "") {
Toast.makeText(this, "Field cannot be empty", Toast.LENGTH_SHORT).show()
} else {
if (TextUtils.isDigitsOnly(myNumber)) {
val smsManager: SmsManager = SmsManager.getDefault()
smsManager.sendTextMessage("+91 " + myNumber, null, myMsg, null, null)
Toast.makeText(this, "Message Sent", Toast.LENGTH_SHORT).show()
phoneNo.text.clear()
message.text.clear()
} else {
Toast.makeText(this, "Please enter the correct number", Toast.LENGTH_SHORT)
.show()
}
}
}
btn.setOnClickListener {
val permissionCheck =
ContextCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS)
if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
myMessage()
} else {
ActivityCompat.requestPermissions(
this, arrayOf(Manifest.permission.SEND_SMS),
permissionRequest
)
}
}
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Run the app on emulator or real device, you will get the output as following in video .
Complete Source Code of Send SMS Example :
activity_message.xml file
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:padding="20dp"
android:orientation="vertical"
tools:context=".MessageActivity">
<EditText
android:id="@+id/etPhone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter mobile number" />
<EditText
android:id="@+id/etMessage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:hint="Enter your message" />
<Button
android:id="@+id/sendSMS"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="Send Message" />
</LinearLayout>
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MessageActivity.kt file
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import android.Manifest
import android.content.pm.PackageManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.telephony.SmsManager
import android.text.TextUtils
import android.widget.Button
import android.widget.EditText
import android.widget.Toast
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
class MessageActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_message)
val btn = findViewById(R.id.sendSMS)
val phoneNo = findViewById(R.id.etPhone)
val message = findViewById(R.id.etMessage)
val permissionRequest = 101
fun myMessage() {
val myNumber: String = phoneNo.text.toString().trim()
val myMsg: String = message.text.toString().trim()
if (myNumber == "" || myMsg == "") {
Toast.makeText(this, "Field cannot be empty", Toast.LENGTH_SHORT).show()
} else {
if (TextUtils.isDigitsOnly(myNumber)) {
val smsManager: SmsManager = SmsManager.getDefault()
smsManager.sendTextMessage("+91 " + myNumber, null, myMsg, null, null)
Toast.makeText(this, "Message Sent", Toast.LENGTH_SHORT).show()
phoneNo.text.clear()
message.text.clear()
} else {
Toast.makeText(this, "Please enter the correct number", Toast.LENGTH_SHORT)
.show()
}
}
}
btn.setOnClickListener {
val permissionCheck =
ContextCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS)
if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
myMessage()
} else {
ActivityCompat.requestPermissions(
this, arrayOf(Manifest.permission.SEND_SMS),
permissionRequest
)
}
}
}
}
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Conclusion: In this article we have covered how to send message from app in Android Studio by using Kotlin Language.