How to limit framerate when using Android's GLSurfaceView.RENDERMODE_CONTINUOUSLY?

Question

I have a C++ game running through JNI in Android. The frame rate varies from about 20-45fps due to scene complexity. Anything above 30fps is silly for the game; it\'s just b

Answer 1

If you don't want to rely on Thread.sleep, use the following

double frameStartTime = (double) System.nanoTime()/1000000;
// start time in milliseconds
// using System.currentTimeMillis() is a bad idea
// call this when you first start to draw

int frameRate = 30;
double frameInterval = (double) 1000/frame_rate;
// 1s is 1000ms, ms is millisecond
// 30 frame per seconds means one frame is 1s/30 = 1000ms/30

public void onDrawFrame(GL10 gl)
{
  double endTime = (double) System.nanoTime()/1000000;
  double elapsedTime = endTime - frameStartTime;

  if (elapsed >= frameInterval)
  {
    // call GLES20.glClear(...) here

    UpdateGame(elapsedTime);
    RenderGame(gl);

    frameStartTime += frameInterval;
  }
}