title: how to store and retrieve (key,value) kind of data using saved preferences android
body: <p>I have  a hash map table as below,</p>
  
  <pre><code>HashMap&lt;String, String&gt; backUpCurency_values = new HashMap&lt;String, String&gt;();
  </code></pre>
  
  <p>and i want to store these value for future use.. how can i do that?</p>
  
  <p><strong>Edit:</strong><br>
   i will store to Country names and currencyvalue as key and value pair...</p>