title: Open conversation in Whatsapp and populate the text
body: <p>I want to open <code>WhatsApp</code> to a specific conversation and populate the text field with some string.</p>
  
  <p>Code that I have and I managed to open the conversation with a contact:</p>
  
  <pre><code>private void openConversationWithWhatsapp(String e164PhoneNumber){
      String whatsappId = e164PhoneNumber+"@s.whatsapp.net";
      Uri uri = Uri.parse("smsto:" + whatsappId);
      Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
      intent.setPackage("com.whatsapp");
  
      intent.putExtra(Intent.EXTRA_TEXT, "text");
      intent.putExtra(Intent.EXTRA_SUBJECT, "subject");
      intent.putExtra(Intent.EXTRA_TITLE, "title");
      intent.putExtra(Intent.EXTRA_EMAIL, "email");
      intent.putExtra("sms_body", "The text goes here");
      intent.putExtra("text","asd");
      intent.putExtra("body","body");
      intent.putExtra("subject","subjhect");
  
      startActivity(intent);
  }
  </code></pre>
  
  <p>The text box however is not filled with content. I tried to peek inside the <code>AndroidManifest.xml</code> file and found the following info regarding their conversation activity:</p>
  
  <pre><code>&lt;activity android:theme="@style/Theme.App.CondensedActionBar" android:name="com.whatsapp.Conversation" android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:windowSoftInputMode="stateUnchanged"&gt;
      &lt;intent-filter&gt;
          &lt;action android:name="android.intent.action.SENDTO" /&gt;
          &lt;category android:name="android.intent.category.DEFAULT" /&gt;
          &lt;category android:name="android.intent.category.BROWSABLE" /&gt;
          &lt;data android:scheme="sms" /&gt;
          &lt;data android:scheme="smsto" /&gt;
      &lt;/intent-filter&gt;
  &lt;/activity&gt;
  </code></pre>
  
  <p>Does somebody know the extra to use?
  Are they blocking this on purpose?
  I saw an API for iOS that they have in their <a href="https://www.whatsapp.com/faq/iphone/23559013">FAQ</a> page.</p>