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How to pass JSONArray from Activity to Html Script?

I want to pass a JSONArray From Activity to HTML Script I'm trying to do this below, but I can not get the data in HTML

Activity: -

 public class DayViewJSActivity extends Activity { WebView webviewobj; String jsurl, eventobj; JSONArray jArray = new JSONArray(); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); webviewobj = (WebView) findViewById(R.id.webView1); webviewobj.getSettings().setJavaScriptEnabled(true); webviewobj.addJavascriptInterface(new calendarInterface(), "Androidfunction"); webviewobj.loadUrl("file:///android_asset/caljs.html"); JSONObject jobject = new JSONObject(); try { jobject.put("id", 1); jobject.put("start_date", "2012-10-22 09:00:00"); jobject.put("end_date", "2012-10-22 10:00:00"); jobject.put("text", "Demo scheduled"); jobject.put("details:", ""); } catch (JSONException e) { e.printStackTrace(); } jArray.put(jobject); jsurl = "javascript:setData('" + jArray + "')"; System.out.println("JSURL IS :" + jsurl); webviewobj.loadUrl(jsurl); } final class calendarInterface { calendarInterface() { } public void run() { webviewobj.loadUrl("javascript:setData( " + jArray + ")"); } }

HTML: -

 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta name = "viewport" content = "initial-scale = 1.0, maximum-scale = 1.0, user-scalable = no"> <script src="Cjs/dhxscheduler_mobile_rec.js" type="text/javascript"></script> <link rel="stylesheet" type="text/css" href="Cjs/dhxscheduler_mobile_rec.css"> <title></title> <script type="text/javascript"> var eventData = null; function setData(eventobj) { eventData = eventobj; } dhx.ready(function(){ dhx.ui.fullScreen(); dhx.ui( { view:"scheduler", id:"scheduler" } ); var data = eventData; $$("scheduler").$$("buttons").setValue("day"); $$("scheduler").parse(data); }); </script> </head> <body> </body> </html>

How do I get HTML values ​​from Activity .

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3 answers

specify the location of the files explicitly in the HTML file, where

 file:///android_asset/Cjs/dhxscheduler_mobile_rec.js
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Here it is, just a simple way, suppose you have the following activity code with an interface, see the following code ...

 public class htmldecoder extends Activity implements OnClickListener,TextWatcher { Button btsubmit; // this button in your xml file WebView wvbrowser; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.htmldecoder); btsubmit=(Button)findViewById(R.id.btsubmit); btsubmit.setOnClickListener(this); wvbrowser=(WebView)findViewById(R.id.wvbrowser); wvbrowser.setWebViewClient(new HelloWebViewClient()); wvbrowser.getSettings().setJavaScriptEnabled(true); wvbrowser.getSettings().setPluginsEnabled(true); wvbrowser.getSettings().setJavaScriptCanOpenWindowsAutomatically(true); MyJavaScriptInterface myinterface=new MyJavaScriptInterface(); wvbrowser.addJavascriptInterface(myinterface,"interface"); webView.loadUrl("file:///android_asset/simple.html"); //use one html file for //testing put your html file in assets. Make sure that you done JavaScript methods to get //values for html content in html file . } public void onClick(View v) { if(btsubmit==v) { webView.loadUrl("javascript:showalert()");// call javascript method. //wvbr } } final class MyJavaScriptInterface { MyJavaScriptInterface() { } public void sendValueFromHtml(String value) { System.out.println("Here is the value from html::"+value); } } }

If you look at this code, you will find that I added an interface (MyJavaScriptInterface) in webview

 wvbrowser.addJavascriptInterface(myinterface,"interface");

Now you need to write javascript in html

 <script type="text/javascript"> //<![CDATA[ var n1; function callme(){ n1=document.getElementById("FacadeAL").value; } function showalert(){ window.interface.sendValueFromHtml(n1);// this method calling the method of interface which //you attached to html file in android. // & we called this showalert javasript method on //submmit buttton click of android. } //]]> </script>

& Make sure you call callme as below in html

 <input name="FacadeAL" id="FacadeAL" type="text" size="5" onblur="callme()"/>

I hope you understand how it works. Let this help you pass your json array.

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 String htmlResp = httpGet(link); public static String httpGet(String url) { HttpParams httpParameters = new BasicHttpParams(); HttpConnectionParams.setConnectionTimeout(httpParameters, 0); HttpConnectionParams.setSoTimeout(httpParameters, 0); DefaultHttpClient httpclient = new DefaultHttpClient(httpParameters); try { final String USER_AGENT = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8 (.NET CLR 3.5.30729)"; // final String ACCEPT_CHARSET = "ISO-8859-1,utf-8;q=0.7,*;q=0.7"; final String ACCEPT_CHARSET = "utf-8"; // final String ACCEPT = // "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"; final String ACCEPT = "text/html"; // HttpGet httpget = new HttpGet(url); HttpGet httpget = new HttpGet(url); // httpget.addHeader("User-Agent", "ie 6"); httpget.addHeader("User-Agent", USER_AGENT); httpget.addHeader("Accept", ACCEPT); httpget.addHeader("Accept-Charset", ACCEPT_CHARSET); httpget.setParams(httpParameters); HttpResponse response = httpclient.execute(httpget); HttpEntity entity = response.getEntity(); return generateString(entity.getContent()); // return getResponseBody(response); } catch (IOException e) { e.printStackTrace(); return null; } } private static String generateString(InputStream stream) { StringBuilder sb = new StringBuilder(); InputStreamReader reader = null; try { reader = new InputStreamReader(stream, "utf-8"); BufferedReader buffer = new BufferedReader(reader); String cur; while ((cur = buffer.readLine()) != null) { sb.append(cur + "\n"); } } catch (UnsupportedEncodingException e1) { e1.printStackTrace(); return null; } catch (IOException e) { e.printStackTrace(); return null; } finally { if (reader != null) { try { reader.close(); reader = null; } catch (IOException e) { e.printStackTrace(); } } if (stream != null) { try { stream.close(); stream = null; } catch (IOException e) { e.printStackTrace(); } } } return sb.toString(); }

apply this code

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Source: https://habr.com/ru/post/1441275/

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