Question

I am new to Android and Java. The following code is to send and wait for receiving SMS. As the process may takes about 3 minutes, I need to have a progressDialog until SMS is received. Could you send me an applet to do this ?

package com.examples.TOLD;
import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;
import android.telephony.SmsManager;
import android.util.Log;
import android.widget.TextView;

public class Sms extends Activity {
/** Called when the activity is first created. */

static TextView smsReceive;

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

    Intent i = getIntent();
    // Receiving the Data
    String reg = i.getStringExtra("reg");
    String port = i.getStringExtra("port");

    String smsMessage = 
        "REG=" + reg + 
        "PORT=" + port;

    // Show SMS sent message on screen 
    TextView smsSend = (TextView) findViewById(R.id.smsSend);
    smsSend.setText(smsMessage);
    Log.i("smsSend",String.valueOf(smsSend.getText()));
    // Send SMS message
    SmsManager sm = SmsManager.getDefault();
    String number = "5556";
    sm.sendTextMessage(number, null, smsMessage, null, null);

    // Receive SMS message
    smsReceive = (TextView) findViewById(R.id.smsReceive);

}
public static void updateMessageBox(String msg)
{
    smsReceive.append(msg);
}    
}

Here is another class to receive SMS:

package com.examples.TOLD;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.util.Log;


public class SmsReceiver extends BroadcastReceiver{

public void onReceive(Context context, Intent intent)
{
    Bundle bundle=intent.getExtras();

    Object[] messages=(Object[])bundle.get("pdus");
    SmsMessage[] sms = new SmsMessage[messages.length];

    for(int n=0;n<messages.length;n++){
        sms[n]=SmsMessage.createFromPdu((byte[]) messages[n]);
    }

    for(SmsMessage msg:sms){
        String num = msg.getOriginatingAddress();
        Log.i("SMS sender",num);
        if (num.equals("15555215556")) {
        Sms.updateMessageBox("\nFrom: " + msg.getOriginatingAddress() + 
                "\n" + "Message: " + msg.getMessageBody() + "\n");}           
    }
}
}

Answer 1

I think you can try to reconsider your approach. You can’t expect user will be waiting for up to 3 minutes for the SMS. So you code looks right (except the part of the static method cos I explain you later), but once your message is sent, I’d show a message that your app is waiting for the message, and when the message is received in the SmsReceiver, you can communicate with the Sms activity.

But, you shouldn’t use that static method to update the content of the activity for several reasons (UI can’t be updated in background or most important when the SmsReceiver is fired SMS activity can even non exist). The right way would be sending an intent from the receiver. You can see a detailed step by step example in the pdf contained in this link in the section Receiving SMS messages.