Disabled seekBar without dimming

Yes. It is possible! But you need to override SeekBar's drawableStateChanged function, with something like this:

@Override
protected void drawableStateChanged() {
    super.drawableStateChanged();
    final Drawable progressDrawable = getProgressDrawable();
    if(isEnabled() == false && progressDrawable != null) progressDrawable.setAlpha(255);
}

Actually I was very angry, when I saw hardcoded alpha value in AbsSeekBar:

mDisabledAlpha = a.getFloat(com.android.internal.R.styleable.Theme_disabledAlpha, 0.5f);

Because there is no function, which will turn off, or even change disabled alpha value for SeekBar. Just take a look at those lines of code in drawableStateChanged function:

if (progressDrawable != null) {
    progressDrawable.setAlpha(isEnabled() ? NO_ALPHA : (int) (NO_ALPHA * mDisabledAlpha));
}

I'm not sure why you'd want to change this, and I don't believe it's good practice to override the visual queue for a user that something is disabled. If it looks active, but doesn't interact, I'm going to be mad at your app.

Regardless, to answer your question, you should look at StateListDrawable this question outlines it specifically for seek bars.

Better solution here....

seekBar.setOnTouchListener(new OnTouchListener(){
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            return true;
        }
    });