If you want to display a PDF file in your android application which is located at the remote server then you have to follow the instructions given below.

Add this web-view in your xml file.

<WebView
    android:id="@+id/webView"
    android:layout&#95;width="match&#95;parent"
    android:layout&#95;height="match&#95;parent"
   />

Add this code in onCreate method in your Activity.

WebView webView=(WebView)findViewById(R.id.webView);
        webView.getSettings().setJavaScriptEnabled(true); 
        webView.setWebViewClient(new Callback());

  String url="path of remote pdf";
  webView.loadUrl("https://docs.google.com/viewer?url=" + url);

Add this method in your Activity.

 private class Callback extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(
            WebView view, String url) {
        return(false);
    }
}

Hope you find it helpful :)