title: react-native fetch throws "Network request failed" error just on Android Devices
body: <p>I'm having the following problem with the API fetch on android devices:</p>
  
  <p><a href="https://i.stack.imgur.com/7lqHR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7lqHR.png" alt="Error"></a></p>
  
  <p>Here is the fetching code:</p>
  
  <pre><code>login(user,password) {
      let query = oauthManager.loginUrl(user,password);
      console.log(query);
  
      return fetch(query)
      .then(response =&gt; response.json())
          .then(json =&gt; {
              //Error
              if( json.error ){
              console.log(json.error);
              return false
          }
  
          //Save and return token
          return oauthManager
            .saveOauth(json)
            .then(() =&gt; {
              return oauthManager.saveUser(user)
            })
            .then(() =&gt; {
              return oauthManager.getToken()
            })
            .then(token =&gt; {
              console.log(token);
              return true
            });
      })
      .catch((error) =&gt; {
        console.log(error)
      });
    },
  </code></pre>
  
  <p>The scripts works fine on ios devices.
  Any ideas on why is this happening?</p>
  
  <p>Thank you very much</p>