Scollview 和 EditText 滚动冲突

EditText ed_more = (EditText) findViewById(R.id.ed_more);
ed_more.setOnTouchListener(this);

@Override
public boolean onTouch(View v, MotionEvent event) {
if ((v.getId() == R.id.ed_more && canVerticalScroll(ed_more))) {
ed_more.getParent().requestDisallowInterceptTouchEvent(true);
if (event.getAction() == MotionEvent.ACTION_UP) {
ed_more.getParent().requestDisallowInterceptTouchEvent(false);
}
}
return false;
}

private boolean canVerticalScroll(EditText editText) {
int scrollY = editText.getScrollY();
int scrollRange = editText.getLayout().getHeight();
int scrollExtent = editText.getHeight() - editText.getCompoundPaddingTop() -editText.getCompoundPaddingBottom();
int scrollDifference = scrollRange - scrollExtent;
if(scrollDifference == 0) {
return false;
}
return (scrollY > 0) || (scrollY < scrollDifference - 1);
}