Android Jumpstart - Win HTC Hero Phone

PUNE Google Technology User Group

Pune GTUG presents Android Jumpstart Seminar. A seminar where we would get people excited, thrilled and ready on Android Platform

The Objective about this seminar is as follows

1. Introduce Android
2. Introduce the building blocks and architecture
3. Talk on Building an Application on Android comprising of all the building blocks

Lucky draw winner wins an HTC Hero phone from our esteemed sponsors Quick Office and Synerzip

Date and Time

21^st November 2009, Saturday morning 10:00 am to 2:00 p.m

Venue

The Orbett Hotel - 1238/2, Apte Road, Deccan Gymkhana, Pune – 411004

Click here for Location on Google Maps

Registration

Registration is at the Venue. No preregistration of the event. There are no fees

Schedule

• 10:00 a.m to 10:30 a.m – Registration
• 10:30 a.m to 12:30 p.m – Seminar
• 12:30 p.m to 2:00 p.m
• Talk from QuickOffice + Synerzip for exciting Android Opportunities
• Lucky Draw to give away HTC Hero Phone

Event is sponsored by Quick Office and Synerzip.

Here is the Presentation we will use for the Seminar

Seminar on Google Wave - Building Gadgets and Robots

Google Wave is a new model for communication and collaboration on the web, coming later this year.
Here's a preview of just some of the aspects of this new tool.


What is a wave?



A wave is equal parts conversation and document. People can communicate and work together with richly formatted text, photos, videos, maps, and more.
A wave is shared. Any participant can reply anywhere in the message, edit the content and add participants at any point in the process. Then playback lets anyone rewind the wave to see who said what and when.
A wave is live. With live transmission as you type, participants on a wave can have faster conversations, see edits and interact with extensions in real-time.

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Seminar Topics
- Introduction to Google Wave
- Building Extensions to Google Wave
- Building Gadgets - Walk through of building a Gadget
- Building Robots - Walk through of building a Java based Robot

Presentation on Google Wave

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Date - 12th September 2009 - 4:00 p.m to 7: p.m
Venue - Synerzip Softech - L1 (Ground floor)
Dnyanvatsal Commercial Complex,
Opposite Vanadevi mandir,
Karve Nagar,
Pune, India 411052
Tel: 91-9923085006

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Advanced Android Features - GodSpeed

Why one has to use a Handler in Android?

Following is inferred from the documentation about a Handler

The handler is used to schedule a runnable on the message queue of the thread that created the handler. it is mostly used to schedule UI updates on the UI thread

The one think I could not understand why I can't use any thread to update UI.

I did some experiment for the same.

Here I tried to update a TextView after every 1 second for 50 seconds using a normal thread and it failed. I got an exception

package org.punegtug.sample;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;

public class HandlerTest extends Activity {
private TextView textView = null;
private int index = 0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.main);
textView = (TextView) findViewById(R.id.textView);
textView.setText("index="+index);
}

/*
* (non-Javadoc)
*
* @see android.app.Activity#onPause()
*/
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}

/*
* (non-Javadoc)
*
* @see android.app.Activity#onResume()
*/
@Override
protected void onResume() {

Runnable runnable = new Runnable() {

@Override
public void run() {
index = 0;
while (index < 50) {

//Tried to access text from UI component textView
String text= textView.getText().toString();

//Directly tried to update UI in this thread
textView.setText("index="+index++);


try {
// do what you want to do before sleeping
Thread.currentThread().sleep(1000);// sleep for 1000 ms
// do what you want to do after sleeptig
} catch (InterruptedException ie) {
// If this thread was intrrupted by nother thread
}

}

}

};
Thread thread = new Thread(runnable);
thread.start();


}

}

But the following code with Handler worked

t android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;

public class HandlerTest extends Activity {
private TextView textView = null;
private int index = 0;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.main);
textView = (TextView) findViewById(R.id.textView);
textView.setText("index="+index);
}

/*
* (non-Javadoc)
*
* @see android.app.Activity#onPause()
*/
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}

/*
* (non-Javadoc)
*
* @see android.app.Activity#onResume()
*/
@Override
protected void onResume() {
final Handler handler = new Handler(new Handler.Callback() {

@Override
public boolean handleMessage(Message msg) {
textView.setText("index="+index++);
return false;
}
});
Runnable runnable = new Runnable() {

@Override
public void run() {
index = 0;
while (index < 50) {

//Tried to access text from UI component textView
String text= textView.getText().toString();

//Indirectly tried to update UI in this thread
handler.sendEmptyMessage(0);


try {
// do what you want to do before sleeping
Thread.currentThread().sleep(1000);// sleep for 1000 ms
// do what you want to do after sleeptig
} catch (InterruptedException ie) {
// If this thread was intrrupted by nother thread
}

}

}

};
Thread thread = new Thread(runnable);
thread.start();


}

}

So I could, one can not update a UI component in any other thread than UI thread. However, getting values from existing UI components in any thread (e.g textView.getText()) works fine.

Hence we need to use Handler.

Soon, I will send a post about Looper.

Google Visualization API and Code Playground Discussion

Let's talk on Google Visualization API this saturday (20th of June 2009). I will also introduce you to Google Code Playground, an excellent tool to try the Google's javascript based APIs

With Google Visualization APIs you can do the following thing
1. Pull data from datasources like Google Spreadsheet or your own PHP or Java Servlet DataSource
2. Pull Data in SQL fashion with Select Queries and Where clauses
3. Render the data in
a. Data Table
b. Various Charts and Graphs
c. Any third party visualization libraries

With Google Code Playground any one can learn in hours Google's javascript based APIs like
1. Google Maps
2. Google Search
3. Google Translation
etc

Come and join us this saturday at
Venue
Dnyanvatsal Commercial Complex, Floor 5
Survey No. 23, Plot No. 189,
Karve Nagar,
Pune, India 411052
Contact no. - 9923085006
See on Google Map
http://www.synerzip.com

Between
4:00 p.m to 6:00 p.m, Saturday, 20th June 2009

Photos from "Getting Started with Android" on 6th of June 2009

Android - Introductory Session

Getting Started with Android - 6th June 2009 - 4:00 p.m

Pune GTUG would be meeting on 6th June 2009 at 4:00 p.m at the below mentioned venue for the topic "Introduction to Android".

Venue
Dnyanvatsal Commercial Complex
Survey No. 23, Plot No. 189,
Karve Nagar,
Pune, India 411052
Contact no. - 9923085006
See on Google Map
http://www.synerzip.com

Agenda for this meet is as follows

1. Brief History of Android
   
2. Android Phones
   
3. Android Experiments
   
4. What is Android?
   
5. What’s in new SDK
   
6. Android Architecture in detail
   
7. Application Fundamentals
   
8. User Interface
   
9. Resources and Assets
   
10. Data Storage
    
11. Content Providers
    
12. Security and Permissions
    
13. Developing Android Applications In Eclipse, with ADT
    
14. First Android Application
    
15. Further Reading
    

Speaker Bio - Sushrut Bidwai

• Writing a book on Android (near future)
  
• Leading a team of 15+ programmers in Nasik.
  
• Works mainly on Java centric technologies and that too specifically on Google centric like GWT, Android, GAE for Java.
  
• Provide information content to fellow developers through our blogs like androidcompetencycenter.com .
  
• Worked with Persistent Systems and YagnaIQ (Pune based startup) at the start of career.
  
• Rest of the things can be found on http://sushrutbidwai.com/about

 If you have any issues feel free to write to pune-gtug mailing list.