title: how to open pdf in webview without gdoc from Url
body: <p>I try to open pdf url in my webview with below code , i found solutions with gdoc but it is not useful for me because I want to show pdf only in view mode and user should not download and also need to clear cache after back press</p>
  
  <p>code : </p>
  
  <pre><code>    mWebView.setWebChromeClient(new WebChromeClient());
      WebSettings settings = mWebView.getSettings();
      settings.setPluginState(WebSettings.PluginState.ON);
      mWebView.setWebViewClient(new MyBrowser());
      mWebView.setBackgroundColor(0x00000000);
      settings.setAllowFileAccess(false);
      settings.setBuiltInZoomControls(true);
      settings.setSupportZoom(true);
      settings.setUseWideViewPort(true);
      settings.setLoadWithOverviewMode(false);
      settings.setSaveFormData(false);
      settings.setJavaScriptEnabled(true);
  </code></pre>