title: Validation for a cell number in Android
body: <p>I have a UI where user enters the cell number and the number is stored in a string variable and then its stored into the database.</p>
  
  <p>I want to validate the string to check whether the string does not contain any characters.</p>
  
  <p>How do I do that?</p>
  
  <p>Below is the string code.</p>
  
  <pre><code>EditText editText3 = (EditText) this.findViewById(R.id.editText2);
  setNum = editText3.getText().toString(); //setNum would contain something link 8081124589
  </code></pre>