Thread

A Thread is a block of code that runs in parallel with the existing code of a class.

Example:

First, implement the Runnable interface.
implements Runnable

Second, declare an instance variable to refer to the Thread object.
Thread myThread;

Third, create the Thread object in a method or in onCreate.
myThread = new Thread(this);
myThread.start();

Fourth, write the run method that is declared in the Runnable interface.

public void run()
{
   while (true)
   {
     try
     {
       Thread.sleep(500); // 500 ms
       theView.postInvalidate(); // do whatever
     }
     catch (Exception e)
     {
       break;
     }
   }
} // end of method public void run()