How to send SMS using SmsManager by Runtime Permission in android studio

Hello freind today we willl learn about How to send SMS using SmsManager by Runtime Permission in android studio.

We use Message Sender only when we create a messaging app, then we use this feature in it.It is very easy to make, we just have to follow some steps.Let's see how to create it

First we will create a project Android And as soon as we create the project we will see two files MainActivity and activity_main .We will first create the design in activity_main, what type we need

activity_main

<?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:orientation="vertical"
    tools:context=".MainActivity">

  <EditText
      android:id="@+id/editText"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:hint="Enter your message here"
      android:layout_margin="20dp"/>

    <EditText
        android:id="@+id/edittext2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter mobile number"
        android:layout_margin="20dp"/>

    <Button
        android:id="@+id/sendMessage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Send Message"
        android:layout_gravity="center_horizontal"/>




</LinearLayout>

In this layout we have used two edittext one button Through edittext we will input the message and mobile number from the user and send the message through the button.

MainActivity.java

package com.example.sendmessageexample;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private static final int PERMISSION_REQUEST_CODE = 10;
    private Button sendBtn;
    private EditText edit_message, edit_number;
    String msg, phoneNo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {

            if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.SEND_SMS)) {


            } else {
                ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.SEND_SMS}, PERMISSION_REQUEST_CODE);
            }
        }
        sendBtn = findViewById(R.id.sendMessage);
        edit_message = findViewById(R.id.editText);
        edit_number = findViewById(R.id.edittext2);
        sendBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                sendMessage();
            }
        });


    }

    private void sendMessage() {
        msg=edit_message.getText().toString();
        phoneNo=edit_number.getText().toString();
        SmsManager smsManager= SmsManager.getDefault();
        smsManager.sendTextMessage(phoneNo,null,msg,null,null);
        Toast.makeText(this, "Message Sent", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch(requestCode)
        {
            case PERMISSION_REQUEST_CODE:
            {
                if (grantResults.length>0&&grantResults[0]==PackageManager.PERMISSION_GRANTED)
                {
                    Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show();
                }
                else
                {
                    Toast.makeText(this, "Permission not granted..", Toast.LENGTH_SHORT).show();
                }
            }
        }
    }
}

Here we have used onclick on the button, as soon as the user clicks on the button, the message will be sent.But before that we have to take Runtime permission of send message.Using SmsManager we will write program using message sendTextMessage.And in the last we will not forget to give permission in the manifest.like this

Manifest

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.sendmessageexample">
    <uses-permission android:name="android.permission.SEND_SMS"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.SendMessageExample">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Thank you