The FPS system

In the case of game development and gaming industry, FPS matters a lot. The game quality measurement depends heavily on the FPS count. In simple words, the higher the FPS of the game, the better. The FPS of a game is dependent on the processing time for instructions and rendering.

It takes some time to execute the game loop once. Let's have a look at a sample implementation of FPS management inside a game loop:

long startTime;
long endTime;
public final int TARGET_FPS = 60;

@Override
public void onDraw(Canvas canvas)
{
  if(isRunning)
  {
    startTime = System.currentTimeMillis();
    //update and paint in game cycle
    MainGameUpdate();

    //set rendering pipeline for updated game state
    RenderFrame(canvas);

    endTime = System.currentTimeMillis();
    long delta = endTime - startTime;
    long interval = (1000 - delta)/TARGET_FPS;
      
    try
    {
      Thread.sleep(interval);
    }
    catch(Exception ex)
    {}
    invalidate();
  }
}

In the preceding example...