Apps Optimization and fps on java for android

[kewlkevkev]

I have recently followed and completed this tutorial . I am now trying to make my own application based on the guidance of the tutorial. The tutorial sets up a package with classes for framework, framework implementation, and then the actual game code. With two images being used as a scrolling background my game stutters every couple of seconds. I couldn't find anything in the tutorial about controlling fps. My question is would setting a max fps fix my problem and if so could someone show me an example of what it should look like. I apologize if this is a stupid question this is my first attempt at making an application in java and I have no formal instruction.

 

[Manaya]

I'm not sure I understand what you mean, is the game running too slow or too fast?

If it's too fast, have something like this in the main game loop thread:

long prevTime = System.nanoTime();
while(running)
{[INDENT]
// get elapsed time since last frame
long currentTime = System.nanoTime();
float deltaTime = (currentTime - prevTime) * 0.000000001f;
prevTime = currentTime;
if (deltaTime > 0.25f) deltaTime = 0.25f; // cap a frame update to a quarter of a second

// update scene with deltaTime then render scene[/INDENT]}

deltaTime will hold the amount of time it passed since last frame, in seconds, in this case.


However, if the game updates too slow, then there could be a lot of reasons for it and I can't help if I have no idea what your actual code looks like. Just make sure you don't load the images from file every frame because that's extremely slow and inefficient, load them once at startup, and store them in memory in a Bitmap instead.


EDIT: by the way, I'm new here but why if you click on the button supposed to add [CODE] tags to your post it adds [HIGH] ? I see it confuses a lot of people.