1.5 issues

As you start working with widgets, you will quickly realize that they are stateless. Every call back to paint the widget is invoked and the process dismantled (unless you take reasonable steps to keep this process alive, if that were to be needed). There is no explicit or direct mechanism to ask the widget: "Hey, what did I paint you with the last time around?". This is essentially a valid question if the widget were to have a state. Such a state is typically (indirectly) maintained using a persistence mechansim such as files, shared preferences, SQLLite, or the internet itself.

This item has some example **drafty** source code to illustrate this.

Android Architectural Predicates

Android Architecture Pictures

android coding patterns

Android Configuration Changes, Restart Activities, Weak References

android design basics

android tool options

Android virtual devices

Another set of sample code for a live folder

app widget code snippets

Compare and contrast LiMo with Android

Creating a new android project

You will find in this document

1. Basic research on Android AlarmManager API
2. Useful api references while working with AlarmManager
3. Not-so-intuitive truths about AlarmManager
4. Sample code
5. Downloadable Sample project
6. Finally what I call the AlarmManager Predicates

See the document for: Android Home widgets Research Notes

How best to migrate projects to 1.5?

How can I view source on an android browser?

How come I can't open XML wizard?

How to buy and use Dev phone 1?

public class Utils 
{
   public static long getThreadId()
   {
      Thread t = Thread.currentThread();
      return t.getId();
   }

   public static String getThreadSignature()
   {
      Thread t = Thread.currentThread();
      long l = t.getId();
      String name = t.getName();
      long p = t.getPriority();
      String gname = t.getThreadGroup().getName();
      return (name 
            + ":(id)" + l 
            + ":(priority)" + p
            + ":(group)" + gname);
   }
   
   public static void logThreadSignature()
   {
      Log.d("ThreadUtils", getThreadSignature());
   }
   
   public static void sleepForInSecs(int secs)
   {
      try
      {
         Thread.sleep(secs * 1000);
      }
      catch(InterruptedException x)
      {
         throw new RuntimeException("interrupted",x);
      }
   }
}

How to start emulator manually

How to use a broadcast receiver

How to use PendingIntent

How to use toast

intent filters and uris

Key processing

LiveFolders sample code from betterandroid

New XML file wizard

A journal/notes on installing android versions over time, again, and again. Look through towards down for more and more refinement and information.

Notification Manager

Pleasing Android Layouts

Pro Android 2 is a detailed look at (java based) application development on Google's Mobile OS published by APress. The book is written by Sayed Hashimi, Satya Komatineni., and Dave MacLean. This book covers the Android API all the way to its current public release which is 2.1.

You can read more at this link.

Pro Android 3 is a very detailed (estimated at 950 pages) look at (java based) application development on Google's Mobile OS published by APress. This edition of the book is written by Satya Komatineni, Dave MacLean, and Sayed Hashimi. This book will cover the next public release of Android API (Release 3).

Pro Android Chapter Source Code as Eclipse Projects

.

At APress Site

Buy ebook

Buy from Springer

Buy it on Amazon

It is finally here!!

Pro Android is a detailed look at application development on Google's Mobile OS published by APress. The book is written by Sayed Hashimi and Satya Komatineni. I am later of those two. This book covers the Android API all the way to its current public release which is 1.5.

You can read more about this at this link.

Saving an activity state

Security and cell phone development

Security and permissions

on services

Source code for Long Running Broadcast Service

Summarize Android FAQs

The future of Android

This covers a) handlers b) sample code for handlers and messages c) offloading long processes to threads d) instantiating handlers e) getting messages to work with handlers f) working with threads

You will see here

research
links
sampel code
predicates on packages and libraries

Understand Java generics and Unlimited variable length arguments. Both these facilities are used in the Android AsyncTask class.

Understanding Android Resource Arrays, Plurals, Configuration qualifiers

Understanding long running services

It is often, occasionally followed by a wave of hand, that one advises or talks of "jar" (packaged java files that makes up an application or module) files as being signed.

Few times we ask back: "What do you mean by signed"?

What does it mean for a jar file to be signed?

Does this signing has parallels to how we sign physical documents? Do they differ? How do they differ if they do?

How do you establish a "pattern? of understanding for digital signatures so that you treat the subject abstractly just like when someone says they signed a physical document?

Click on the link above to read more...

PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE); 

PowerManager.WakeLock wl = pm.newWakeLock
     (PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag"); 

wl.acquire();   

   //..screen will stay on during this section.. 

wl.release();

Using Android Market

what are android live folders?

What are APNs?

what are homescreen widgets?

what are sdk tools?

What is a good Map to use for writing Registries

what is android cupcake?

What is Android NDK?

What is API level and how is it used?

what is DDMS?

What is min sdk version

what is phonegap?

What is squirrelfish?

What is the add on feature and how does it work?

what is the android tool?

what is the uses-library tag?

what is titanium?

what is xmlvm?

whats up with android 1.5

where can I find a list of installed packages

Home
Dev Tools
Package Browser

Why is x86 support important?