title: Remove the background of a textview
body: <p>I set a background for a textview and I want to remove it dynamically but it dosen't work,
  are there any suggestion?</p>
  
  <pre><code>if (mToday) {
          monthView[mRow][mColumn].setBackgroundResource(R.color.black);
      }
      else {
          monthView[mRow][mColumn].setBackgroundResource(0);
      }
  </code></pre>
  
  <p>I found a reasonable explanation <a href="https://stackoverflow.com/questions/9213449/removing-the-background-color-of-an-edittext">here</a> why it is happen, but again didn't solve the problem.</p>