Listen for SMS in android

Question

I followed a tutorial about listening for SMS in android, but I can't figure out why my code doesn't work. It compiles without errors, app runs, but I can't get toast to appear when message is recieved. Help will be appriciated :-D

MainActivity.java:

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Intent listener = new Intent(this, ListenToSMS.class);
    listener.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startService(listener);

    Toast toasttest = Toast.makeText(this, "test" , Toast.LENGTH_LONG);
    toasttest.show();

    }
}

ListenToSMS.java:

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.provider.Telephony;
import android.telephony.SmsMessage;
import android.widget.Toast;


public class ListenToSMS extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    if (Telephony.Sms.Intents.SMS_RECEIVED_ACTION.equals(intent.getAction())) {
        for (SmsMessage smsMessage : Telephony.Sms.Intents.getMessagesFromIntent(intent)) {
            String messageBody = smsMessage.getMessageBody();

            Toast toast = Toast.makeText(context, messageBody, Toast.LENGTH_LONG);
            toast.show();
            }
        }
    }
}

AndroidManifest.xml:

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

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

    <receiver android:name=".ListenToSMS">
        <intent-filter>
            <action android:name="android.provider.Telephony.SMS_RECEIVED" />
        </intent-filter>
    </receiver>

</application>

<uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS"></uses-permission>