1

 return (mPrivateFlags & PFLAG_FOCUSED) != 0;

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private boolean performFocusNavigation(KeyEvent event) {
   ...
        View focused = mView.findFocus();
        if (focused != null) {
            View v = focused.focusSearch(direction);
            if (v != null && v != focused) {
                // Do the math to get the interesting rect
                // of previous focused into the coord system of
                // newly focused view
                focused.getFocusedRect(mTempRect);
                if (mView instanceof ViewGroup) {
                    ((ViewGroup) mView).offsetDescendantRectToMyCoords(focused, mTempRect);
                    ((ViewGroup) mView).offsetRectIntoDescendantCoords(v, mTempRect);
                }
                if (v.requestFocus(direction, mTempRect)) {
                    boolean isFastScrolling = event.getRepeatCount() > 0;
                    playSoundEffect(SoundEffectConstants.getConstantForFocusDirection(direction, isFastScrolling));
                    return true;
                }
            }

            // Give the focused view a last chance to handle the dpad key.
            if (mView.dispatchUnhandledMove(focused, direction)) {
                return true;
            }
        } else {
            if (mView.restoreDefaultFocus()) {
                return true;
            }
        }
  ...
}