Saving Activity state on Android when change orientation

In Android application when we change the orientation of device then our activity is recreated and some time we face the NullPointerException. To handle NullPointerException or other exceptions we can save current state and retrive the values or tell in AndroidManifest.xml that don’t destroy this activity. Solution 1:

Android AsyncTask Example | Simplest code

AsyncTask is a background process that easily handle UI without handler.You must know that why we use background process. We need background process / multi threading for long processes like communicate with Internet or database. If you handle Multi Threading smartly then your mobile application should perform better.

Android Thread Example : Simplest code

This article will describe Android thread example:- Multi threading, Processes and Threads in Android application development: In Android every programm (application) have a main thread. We can’t do long processing in main thread. Long processes like communicate with Internet, parse long data or communicate with database etc.

Convert any file into byte array or byte array into string in Android

How to convert image or video file into byte[] or byte[] into String in Android: TO upload image, video or any other file on server fro Android app we need to convert that image / video file to string or upload byte by byte. Note: this method is suite able for small files (image, video, …

Java / Android Sort ArrayList

How to sort an ArrayList in Android: Following code is describing, how to sort an Android / Java array list of user defined class. Collections.sort(empList, new Comparator<Employee>(){ public int compare(Employee emp1, Employee emp2) { return emp1.getFirstName().compareToIgnoreCase(emp2.getFirstName()); } });