How can I create a project in Android Studio to function default SMS app

Question

Continuation of the previous query, see: SMS Receiver for AND API 19 and higher

I need to make the application run in the background and I could have it after instal

Answer 1

I am tried with this code it help me...

manifests.xml

then create 4 file for smsReader,mmsReader,ComposeSMS,HeadlessSMSservice

smsReader.java

public class SMSReceiver extends BroadcastReceiver {
Notification notification;//=new Notification(R.drawable.icon,"New Message",System.currentTimeMillis());
NotificationManager notificationmaneger;

String SMSmsg;
public SMSReceiver() {
}
public static final String SMS_BUNDLE = "pdus";
@Override
public void onReceive(Context context, Intent intent) {
    Bundle intentExtras = intent.getExtras();
    if (intentExtras != null) {
        Object[] sms = (Object[]) intentExtras.get(SMS_BUNDLE);
        String smsMessageStr = "";

        for (int i = 0; i < sms.length; ++i) {
            SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) sms[i]);

            String smsBody = smsMessage.getMessageBody().toString();
            String address = smsMessage.getOriginatingAddress();

            smsMessageStr += "SMS From: " + address + "\n";
            smsMessageStr += smsBody + "\n";

            builder.setAutoCancel(true);
            //  builder.setTicker("this is ticker text");
            builder.setContentTitle("New Messge");
            builder.setContentText(SMSmsg);
            builder.setSmallIcon(R.drawable.smsicon);
            builder.setColor(context.getResources().getColor(R.color.colorAccent));
            builder.setContentIntent(pendingIntent);
            builder.setOngoing(true);
            // builder.setSubText("You have pending tax");   //API level 16
            //builder.setNumber(100);
            builder.build();
        }
SMSmsg=smsMessageStr;

    }
}

mmsReader.java

public class MMSReceiver extends BroadcastReceiver
{
    public MMSReceiver()
    {
     }
    @Override
    public void onReceive(Context context, Intent intent) {
    }
  }

ComposeSMS.java

public class ComposeSMS extends Activity {

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
 }

}

HeadlessSMSservices.java

public class HandlessSMSSendService extends Service {

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
    }
 }

if u want to see SMS then add listview in composeSMS.java and bind received data from sms table to listview adapter.