Chapter 8 Messaging and Networking

ahitagni · February 28th, 2012, 07:22 AM

In Chapter 8 Messaging and Networking, the example that is given to send sms under "TRY IT OUT" does not seem to work the code is giving error. even when i am running it by downloading the example code it still not working. Its to be noted that my SDK is fine i can compile and run other codes that i have written.
Any help regarding this topic will be highly appreciated.
Thanx in advance.

ahitagni · February 28th, 2012, 01:49 PM

Well i was not able to solve the problem of the downloaded code but i wrote this it works and does the same task.

The file is the MainActivity.java in (NameOfYourProgramActivty.Java)

Code:

 
package com.ahitagni.test2;

import android.app.Activity;
import android.os.Bundle;


import android.app.PendingIntent;
import android.content.Intent;
import android.telephony.gsm.SmsManager;
import android.view.View;
import android.widget.Button;

public class Test2Activity extends Activity {
	Button btnSendSMS;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        btnSendSMS = (Button) findViewById(R.id.btnSendSMS);
        btnSendSMS.setOnClickListener(new View.OnClickListener()
        {
        	public void onClick(View v)
        	{
        		sendSMS("5556","Hello this is a test");
        		
        	}
        });
    }
    private void sendSMS(String phoneNumber,String message)
    {
      SmsManager sms = SmsManager.getDefault();
      sms.sendTextMessage(phoneNumber,null,message,null,null);
}
}

And the difference from the code in the book is that the import

Code:

android.telephony.SmsManager;

change that line to

Code:

import android.telephony.gsm.SmsManager;

waynecollins · May 7th, 2012, 12:08 PM

I have the code from the book working fine. I am not using it in an emulator I am using on a real device. I send messages to myself. I modified the example to include text entry fields for phone number and a message body. Works great until I go to 161 characters. 160 characters works fine. The application crashes with a FATAL null pointer exception.