Sample How to Send SMS in Android using Unity3D and SMS Manager. (without opening SMS Composer)

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- Directory : [Project]/Assets/Plugins/Android/AndroidManifest.xml -->
<!-- Configure according to your android application information. -->
<manifest
    xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.unity3d.player"
	android:installLocation="preferExternal"
    android:versionCode="1"
    android:versionName="1.0">
  <supports-screens
      android:smallScreens="true"
      android:normalScreens="true"
      android:largeScreens="true"
      android:xlargeScreens="true"
      android:anyDensity="true"/>
  
  <!-- REQUIRED permission -->
  <uses-permission android:name="android.permission.SEND_SMS" />
  <!-- Additional -->
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
  <uses-permission android:name="android.permission.STORAGE" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.SMS_RECEIVED" />
  <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
  <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

  <application
  android:theme="@style/UnityThemeSelector"
  android:icon="@drawable/app_icon"
      android:label="@string/app_name"
      android:debuggable="true">
    <activity android:name="com.unity3d.player.UnityPlayerActivity"
              android:label="@string/app_name">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
      <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
    </activity>
  </application>
</manifest>

SendSMS.cs

using UnityEngine;

public class SendSMS : MonoBehaviour
{
    AndroidJavaObject currentActivity;

    public void Send(string phone)
    {
        if (Application.platform == RuntimePlatform.Android)
        {
            RunAndroidUiThread();
        }
    }

    void RunAndroidUiThread()
    {
        AndroidJavaClass UnityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        currentActivity = UnityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        currentActivity.Call("runOnUiThread", new AndroidJavaRunnable(SendProcess));
    }

    void SendProcess()
    {
        Debug.Log("Running on UI thread");
        AndroidJavaObject context = currentActivity.Call<AndroidJavaObject>("getApplicationContext");
        
        // SMS Information
        
        string phone = "08888888888";
        string text = "Hello World. This SMS is sent using Android SMS Manager.";
        string alert;

        try
        {
            // SMS Manager

            AndroidJavaClass SMSManagerClass = new AndroidJavaClass("android.telephony.SmsManager");
            AndroidJavaObject SMSManagerObject = SMSManagerClass.CallStatic<AndroidJavaObject>("getDefault");
            SMSManagerObject.Call("sendTextMessage", phone, null, text, null, null);

            alert = "Message sent successfully.";
        }
        catch (System.Exception e)
        {
            Debug.Log("Error : " + e.StackTrace.ToString());

            alert = "Error has been Occurred. Fail to send message.";
        }

        // Show Toast

        AndroidJavaClass Toast = new AndroidJavaClass("android.widget.Toast");
        AndroidJavaObject javaString = new AndroidJavaObject("java.lang.String", alert);
        AndroidJavaObject toast = Toast.CallStatic<AndroidJavaObject>("makeText", context, javaString, Toast.GetStatic<int>("LENGTH_SHORT"));
        toast.Call("show");
    }
}

This works and this is awesome! thank you.

Can i use sms manager to receive massages?

Oh wow, after I figured out how to implement this, it worked amazingly! My friend is probably annoyed with all the "test" messages, but it works, so I dont care : P - awesome work on putting all this together in a simple and easy-to-implement way!

help, i do not understand how to implement it, i always have the error "Error has been Occurred. Fail to send message"

I am trying to implement automatic OTP reader in UNITY for android . Received OPT should be read automatically without viewing it.

Very good, it worked like a charm. now please, please I need to be able to read incomming sms in Unity for my android app. It is so that partially sighted people get the text reading as I have implimented it with TTS, STT, calling contact and with this sending SMS. I just need to be able to read out the sms now. This needs to be achivable in Unity.

Just get an Android error "Error has been Occurred. Fail to send message".

I have the same error as VicToMeyeZR.

I found it!

1. you should use the directory in line 2 for AndroidManifest.xml
2. change line 6 (package information) of AndroidManifest file according to your package

Doesn't work for me, can you give me a example? y put the number, and send() at boton fuction, but nothing happend.

Hi. Thanks for making this, I keep getting one error though. My game always exits after the message is sent. Could there be something I am doing wrong?

Works fine on Unity 2017.4.27f1 (64-bit), but crashed on unity 2019.2.11f1

Just get an Android error "Error has been Occurred. Fail to send message".

Same here

help, i do not understand how to implement it, i always have the error "Error has been Occurred. Fail to send message"

Check your xml path

hola
necesito ayuda con este código, ya que lo ocupo para un proyecto

Hey im trying to implement this code but it wont work, could it be that this is impossible in newer android versions?

@Cunibon I'm sorry to say that I don't know, android often updating their spec and API on the newer version, especially permission issue.. I haven't touched Unity and Android in the last couple of years, I'll check and let let you know if I have the time

@rmdwirizki that would be great. I've been trying to get an answer on reddit or stackoverflow for months now didnt expect to actually get an answer here 👍