Capturing json response from webview

Question

What I'm trying to do:

• I am loading the url in webview
• I am viewing 2 3 pages inside webview
• On the last page a transaction is executed and the json response is back
• I need to catch this answer

How to achieve this IN ANDROID?

I have currently successfully uploaded the URL

Myclass.java

public class Myclass extends ActionBarActivity{ public static Context context = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.act_buycredits); context = this; getSupportActionBar().setDisplayHomeAsUpEnabled(true); getSupportActionBar().setBackgroundDrawable( new ColorDrawable(getResources().getColor( R.color.windhya_actionbar_color))); // ////////////////-------SUPORT---MENU----IRRESPECTIVE--OF---VERSIONS---//////////////////////////// try { ViewConfiguration config = ViewConfiguration.get(this); Field menuKeyField = ViewConfiguration.class .getDeclaredField("sHasPermanentMenuKey"); if (menuKeyField != null) { menuKeyField.setAccessible(true); menuKeyField.setBoolean(config, false); } } catch (Exception ex) { // Ignore } // ////////////////-------SUPORT---MENU----IRRESPECTIVE--OF---VERSIONS---//////////////////////////// } @Override public boolean onOptionsItemSelected(MenuItem item) { int itemId = item.getItemId(); switch (itemId) { case android.R.id.home: finish(); // Toast.makeText(this, "home pressed", Toast.LENGTH_LONG).show(); break; } return true; } @Override public void onBackPressed() { MyWebViewFragment fragment = (MyWebViewFragment)getFragmentManager().findFragmentById(R.id.myweb_fragment); WebView webView = fragment.myWebView; if(webView.canGoBack()){ webView.goBack(); }else{ super.onBackPressed(); } } static public class MyWebViewFragment extends Fragment { WebView myWebView; //final static String myBlogAddr = "https://www.payumoney.com/"; //final static String myBlogAddr = "https://entech1.cloudapp.net:8001/paymentGateWay/"; final static String myBlogAddr = Keys.pamentGateway_api; String myUrl; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.layout_webfragment, container, false); myWebView = (WebView)view.findViewById(R.id.mywebview); myWebView.getSettings().setJavaScriptEnabled(true); myWebView.setWebViewClient(new MyWebViewClient()); if(myUrl == null){ myUrl = myBlogAddr; } Map <String, String> extraHeaders = new HashMap<String, String>(); extraHeaders.put("phonenumber",AppController.getPhoneNumber()); extraHeaders.put("authtoken",AppController.getAuthCode()); this.myWebView.getSettings().setRenderPriority(RenderPriority.HIGH); this.myWebView.getSettings().setPluginState(android.webkit.WebSettings.PluginState.ON_DEMAND); this.myWebView.getSettings().setJavaScriptEnabled(true); this.myWebView.getSettings().setDomStorageEnabled(true); this.myWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null); this.myWebView.setWebChromeClient(new WebChromeClient(){ @Override public boolean onJsAlert(WebView view, String url, String message, JsResult result) { // TODO Auto-generated method stub Toast.makeText(context, message, 5000).show(); //Toast.makeText(context, super.onJsAlert(view, url, message, result)+"", 5000).show(); return false; //return super.onJsAlert(view, url, message, result); } }); myWebView.loadUrl(myUrl,extraHeaders); return view; } private class MyWebViewClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { myUrl = url; view.loadUrl(url); return true; } } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setRetainInstance(true); } } } 

HOW TO ACCESS IT

Answer 1

Capturing json response from webview

Cannot write html text from WeView.

But you can try this as follows:

1. Set setWebViewClient to get the current url from webview:

 this.myWebView.setWebViewClient(new WebViewClient() { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { if [url is last page which contain json string] THEN use HttpClient to get string from url END ELSE view.loadUrl(url); return true; } }); 

2. In shouldOverrideUrlLoading check if the url last page, then use the HTTP GET request (HttpGet) using HttpClient to get the response string.

Answer 2

First override shouldOverrideUrlLoading() and onPageFinished WebViewClient

  @override public void onPageFinished (WebView view, String url) { isContent= (url.contains("filename/urlpattern")); } @Override public boolean shouldOverrideUrlLoading (WebView view, String url) { if(isContent) { URL aUrl = new URL(url); URLConnection conn = aUrl.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); // Use inputstream code to read the json.. return true; } return false; }