title: loopj android-async-http error
body: <p>I downloaded the android-async-http-1.4.8.jar and put it under the app->libs folder.  Then add the following code in the MainActivity.</p>
  
  <pre><code>    AsyncHttpClient client = new AsyncHttpClient();
      client.get("http://www.google.com", new AsyncHttpResponseHandler() {
  
          @Override
          public void onStart() {
              // called before request is started
          }
  
          @Override
          public void onSuccess(int statusCode, Header[] headers, byte[] response) {
              // called when response HTTP status is "200 OK"
              textViewDailyTip.setText(response.toString());
          }
  
          @Override
          public void onFailure(int statusCode, Header[] headers, byte[] errorResponse, Throwable e) {
              // called when response HTTP status is "4XX" (eg. 401, 403, 404)
          }
  
          @Override
          public void onRetry(int retryNo) {
              // called when request is retried
          }
      });
  </code></pre>
  
  <p>but I got the error.</p>
  
  <pre><code>Error:(50, 9) error: cannot access AsyncHttpClient
  bad class file: /Users/user/AndroidStudioProjects/yan.com/Yin/app/libs/android-async-http-1.4.8.jar(com/loopj/android/http/AsyncHttpClient.class)
  unable to access file: null
  Please remove or make sure it appears in the correct subdirectory of the classpath.
  </code></pre>