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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