How to check the etTexthb object's current value
<p>I am using two <code>textWatcher</code> objects, which are assigned to two <code>edittext</code>.  In my Android application, when one <code>editTextPer</code> is focusable, then I call the two methods</p>

<pre><code>editTextHb.removeTextChangedListener(etTexthb);
editTextPer.addTextChangedListener(etTextper);
</code></pre>

<p>At this point, is <code>etTexthb</code> value <code>null</code> or not?</p>
