title: How to get all keys of SharedPreferences programmatically in Android?
body: <p>How to get all keys in <code>SharedPreferences</code>, not the value of the preference just key only?</p>
  
  <pre><code>prefA = getSharedPreferences("MyAttack", MODE_PRIVATE);
  prefB= getSharedPreferences("MySkill", MODE_PRIVATE);
  </code></pre>