Ugh. How is this not totally fixed in 2.0+? I know it's not as bad
as 1.6- but properly implemented, touch events should have a
negligible impact on performance.
On Mar 21, 10:47 am, Mario Zechner <badlogicga...@gmail.com> wrote:
> I just coded up a simple performance for a project of mine and found
> that the touch event flood problem is back in town albeit with a new
> face. Here's a simple test case which:
>
> <pre lang="Java">
> package com.badlogic.gdx;
>
> import javax.microedition.khronos.egl.EGLConfig;
> import javax.microedition.khronos.opengles.GL10;
>
> import android.app.Activity;
> import android.opengl.GLSurfaceView;
> import android.opengl.GLSurfaceView.Renderer;
> import android.os.Bundle;
> import android.util.Log;
> import android.view.Window;
> import android.view.WindowManager;
>
> public class LagTest extends Activity implements Renderer
> {
> public void onCreate( Bundle bundle )
> {
> super.onCreate( bundle );
> requestWindowFeature(Window.FEATURE_NO_TITLE);
>
> getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
> WindowManager.LayoutParams.FLAG_FULLSCREEN );
> GLSurfaceView view = new GLSurfaceView( this );
> view.setRenderer( this );
> setContentView( view );
> }
>
> long startTime = 0;
> int frames;
>
> @Override
> public void onDrawFrame(GL10 gl)
> {
> frames++;
> if( System.nanoTime() - startTime > 1000000000 )
> {
> Log.d( "Lag Test", "fps: " + frames );
> startTime = System.nanoTime();
> frames = 0;
> }
> }
>
> @Override
> public void onSurfaceChanged(GL10 gl, int width, int height) {
> // TODO Auto-generated method stub
>
> }
>
> @Override
> public void onSurfaceCreated(GL10 gl, EGLConfig config)
> {
> startTime = System.nanoTime();
> frames = 0;
> }}
>
> </pre>
>
> What this does is simply setting up a GLSurfaceView and output the
> frames per second each second. If you watch your LogCat output while
> touching the screen and dragging your finger you'll see the fps
> counter go crazy. On my Droid with Android 2.0.1 it changes between 55
> frames and 59 frames. As soon as i lift the finger it's back to 60
> frames per second. Setting an OnTouchListener and sleeping in the
> onTouch method does not solve the problem. Can anyone confirm this?
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