priyanshi bhardwaj

Tim Moores wrote:
Where did you get the idea that shorter code is better code?

No where.Actually I want to handles errors and log's in my code.These are just dummy number of errors which I have stated.The errors can go upto from 1....250 also.What if I want to add more errors after few months also.So I want to write a code which is scalable as well as less hard coded so that it's easier for me to handle errors in future also.That is the main reason I am trying to avoid if and when statements writing it for 250 errors is quite almost impossible.
I simply want a class where I will define error code with string which needs to be printed for my user. And a function which will map my error code.

Tim Moores wrote:The proper question is not "can you use reflection", the proper question is "does it make sense". You can use all kinds of approaches to all kinds of problems, but that may not be a good idea. In this case, I don't see what benefit using reflection would have over the approaches Mike mentioned; so you should avoid it.

using when or if statements will increase number of hard coded lines.I want to avoid it.

Mike Simmons wrote:Liutaras is pointing in the right direction.  I would be inclined to use a when statement (Kotlin's version of switch):

fun getError(code: Int): String = when (code) {    400 -> "Invalid"    401 -> "Unauthorised"    else -> "Unknown: $code" }

or a Map:
val errorCodeMap = mapOf(        "E400" to "Invalid",        "E401" to "Unauthorised" ) fun getError(code: String): String    = errorCodeMap.getOrDefault(code, "Unknown: $code")

Can I not use reflection library.was reading this :

https://stackoverflow.com/questions/35525122/kotlin-data-class-how-to-read-the-value-of-property-if-i-dont-know-its-name-at

Hi I am trying to access nested class variables how can I access it.class Errors {    val E400: String = "Invalid"    val E401: String = "Unauthorised"    fun getField(code: String): String {        return code;    } } fun logErrors(errorCode: Int): String {    val code = "E" + errorCode;    val str = Errors().getField(code);    return str; } fun main() {    val kotlin = logErrors(400)    println(kotlin) }

I want the output as "INVALID".
Currently I am getting "E400" I want to return the variable value of E400 ("INVALID").


What I want from code is I call a function with 400 as variable.And I want "Invalid" as output.
If I pass 401 I want "Unauthorised" as output.Or any other simple way of doing it.
I am new with kotlin so unable to do it.

Swastik Dey wrote:what is the value or url variable?

Thanks for replying it's solved now. Solution to my problem was I have enabled Javascript in web-view due to which it was redirecting it to new page .Disabling it ended up stoping of my redirection.

Hi EveryOne,
I am trying to use webview in my android app in which URL of Webview I am handleing using INTENT but when Url is getting loaded .It get's loaded for few seconds and then webpage not found error comes.Any Solution for this.
This is my handle Intent function
 private void handleIntent(Intent intent) {        if (intent != null && intent.hasExtra("url")) {            this.url = intent.getStringExtra("url");        } else {            activity.finish();        }    }
This is my onCreate Function
public void onCreate() {        webView = binding.webview;        handleIntent(activity.getIntent());        try {            showLoader();            webView.getSettings().setJavaScriptEnabled(true);            webView.getSettings().setDomStorageEnabled(true);            webView.setWebChromeClient(new WebChromeClient() {                @Override                public void onProgressChanged(WebView view, int newProgress) {                    super.onProgressChanged(view, newProgress);                    if (newProgress == 100) {                        hideLoader();                    }                }                @Override                public void onReceivedTitle(WebView view, String title) {                    super.onReceivedTitle(view, title);                    if (title != null && !title.isEmpty()) {                        activity.setTitle(title);                    }                }            });          webView.setWebViewClient(new WebViewClient(){              @Override              public void onReceivedError(WebView view, WebResourceRequest request, WebResourceError error) {                  Logger.d("webView","error "+error.toString()+" "+request);                  super.onReceivedError(view, request, error);              }              public boolean shouldOverrideUrlLoading(WebView view, String url) {                  return super.shouldOverrideUrlLoading(view, url);              }              @Override              public void onReceivedHttpError(WebView view, WebResourceRequest request, WebResourceResponse errorResponse) {                  Logger.d("webView","error Response "+errorResponse.toString()+" "+request+" "+errorResponse);                  super.onReceivedHttpError(view, request, errorResponse);              }          });           webView.loadUrl(this.url);        } catch (Exception e) {            e.printStackTrace();            activity.finish();        }    }

Error is as follow

errorcode-10
description: net::ERR_UNKNOWN_URL_SCHEME

Thanks!! It is resolved now.

Ron McLeod wrote:
try {
           JSONArray jsonArray=new JSONArray(responseBody);
           System.out.println("msg"+jsonArray);
       }catch (JSONException e){
           e.printStackTrace();
       }
}
}

How can I convert response.body() to string because response.body.string is no longer in use .

Ron McLeod wrote:Please post the entire stack trace,

org.json.JSONException: Not a primitive array: class java.util.ArrayList 2019-08-18 16:14:05.375 3621-3621/com.example.debug W/System.err:     at org.json.JSONArray.<init>(JSONArray.java:116) 2019-08-18 16:14:05.376 3621-3621/com.example.debugW/System.err:     at com.example.viewmodel.activity.main.MainActivityVM$8.onResponse(MainActivityVM.java:960) 2019-08-18 16:14:05.379 3621-3621/com.example.debug W/System.err:     at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:70) 2019-08-18 16:14:05.379 3621-3621/com.example.debug W/System.err:     at android.os.Handler.handleCallback(Handler.java:873) 2019-08-18 16:14:05.380 3621-3621/com.example.debug W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:99) 2019-08-18 16:14:05.380 3621-3621/com.example.debug W/System.err:     at android.os.Looper.loop(Looper.java:193) 2019-08-18 16:14:05.381 3621-3621/com.example.debug W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:6669) 2019-08-18 16:14:05.382 3621-3621/com.example.debug W/System.err:     at java.lang.reflect.Method.invoke(Native Method) 2019-08-18 16:14:05.383 3621-3621/com.example.debug W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 2019-08-18 16:14:05.384 3621-3621/com.example.debugW/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

Stack Trace is for this particular code

   if (response.isSuccessful()) {                    Log.d("err","msg"+response.body());                try {                    JSONArray jsonArray= new JSONArray(response.body());                    Log.d("err","msg"+jsonArray);                }catch (JSONException e){                    e.printStackTrace();                }

And How can I check JSON VERSION?

Ron McLeod wrote:Try writing response.body() to the log to verify that you are working with a properly formatted JSON payload.

Already done that JSON is properly formatted.

Ron McLeod wrote:Your JSON message has errors.  The are missing " symbols for the country field values.
"country": "India

Still getting same message

Adrian Grabowski wrote:I use org.json for this, it has JSONArray which does exactly what you want.

Already done this it is throwing error
   try {                    JSONArray jsonArray=new JSONArray(response.body());                    Log.d("err","msg"+jsonArray);                }catch (JSONException e){                    e.printStackTrace();                }  

org.json.JSONException: Not a primitive array: class java.util.ArrayList

Matthew Keller wrote:I am having trouble telling if you are receiving this json on the server or in the browser.  In the browser you can use eval() to turn the json into an object, then access it by using dot and array notation.

I am receiving this data in my java file(client side) of my android and then I will be pushing it into my db and fetch that data from it and display it in my xml.

Hi,I am trying to map a response body from an api and use that response body in my app.My API returns an array of Objects.I am using retrofit to use this response body.Still not able to use it.
[    {        "message": {            "content": {                "en": "test1\n"            },            "tsno": 1        },        "state": {            "district": "raipur",            "country": "India        },        "id": "8994fce1-60f4b-4cd5-b831"    },    {        "message": {            "content": {                "en": "test2\n"            },            "tsno": 2        },        "state": {            "district": "Tonk",            "country": "India        },        "id": "8994fcr5-60f4b-4cd5-b831"    }]   I want to deserialise this data How can I do this?