title: android-make whatsapp call
body: <p>I want to make a WhatsApp call to a specific user. I tried this and it doesn't work:</p>
  
  <pre><code>Uri uri = Uri.parse("callto:" + phoneNUmber);
  Intent i = new Intent(Intent.ACTION_CALL, uri);
  i.setPackage("com.whatsapp");
  startActivity(i);
  </code></pre>
  
  <p>I know how to create a WhatsApp message, the code is similar and it works:</p>
  
  <pre><code>Uri uri = Uri.parse("smsto:" + phoneNUmber);
  Intent i = new Intent(Intent.ACTION_SENDTO, uri);
  i.setPackage("com.whatsapp");
  startActivity(i);
  </code></pre>