Get Json Object In Android

I have article view where each post of mine will show details (think of it as blog post) but i cannot parse the data so i get my app closed instead of details of my articles. code

Solution 1:

Actually the name of your Array is categories not article

so in this line of your code val jsonArray = jsonObject.getJSONArray("article"), instead of article you need to add categories

something like below

val jsonArray = jsonObject.getJSONArray("categories")

EDIT 1 :-

As discussed your article_details.xml will be like below

Here you can change size and margins, as you want

<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"android:layout_width="match_parent"android:layout_height="match_parent"><ImageViewandroid:id="@+id/article_image"android:layout_width="match_parent"android:layout_height="150dp"android:layout_marginStart="15dp"android:layout_marginEnd="15dp"android:src="@mipmap/ic_launcher"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" /><TextViewandroid:id="@+id/username"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="30dp"android:layout_marginTop="15dp"android:maxLines="1"android:text="userName"android:textSize="14sp"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@+id/article_image" /><TextViewandroid:id="@+id/article_name"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginStart="30dp"android:layout_marginTop="5dp"android:maxLines="1"android:text="Article name"android:textSize="18sp"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@+id/username" /><TextViewandroid:id="@+id/article_body"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginStart="15dp"android:layout_marginTop="10dp"android:layout_marginEnd="15dp"android:text="Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. "android:textSize="20sp"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toBottomOf="@+id/article_name" /></androidx.constraintlayout.widget.ConstraintLayout>

Now just do the findfindViewById in your ArticlesDetail class so you can set values on them when you receive data from your API

EDIT 2:-

Now Your ArticlesDetail will be like

classArticlesDetail : AppCompatActivity() {

    privatelateinitvar appBarConfiguration: AppBarConfiguration


    var username: TextView? = nullvar articleName: TextView? = nullvar articleBody: TextView? = nullvar articleImage: ImageView? = nulloverridefunonCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main2)

        username = findViewById(R.id.username)
        articleName = findViewById(R.id.article_name)
        articleBody = findViewById(R.id.article_body)
        articleImage = findViewById(R.id.article_image)

        callAPIDemo()
    }

    // api codeprivatefuncallAPIDemo() {
        val mySlugValue: String = intent.getStringExtra("my_slug")
        Log.d("myslug in:", mySlugValue)
        // Instantiate the RequestQueue.val queue = Volley.newRequestQueue(this)
        val url = "https://example.com/api/articles/$mySlugValue"// Request a string response from the provided URL.val stringRequest = StringRequest(
                Request.Method.GET, url,
                Response.Listener<String> { response ->


                    parseAndSetValues(response)

                },
                Response.ErrorListener { error ->
                    //displaying the error in toast if occurrs
                    Toast.makeText(applicationContext, error.message, Toast.LENGTH_SHORT)
                            .show()
                })
        // Add the request to the RequestQueue.
        queue.add(stringRequest)
    }


    privatefunparseAndSetValues(response: String) {


        val jsonObject = JSONObject(response)


        username!!.text = jsonObject.getString("user")
        articleName!!.text = jsonObject.getString("name")
        articleBody!!.text = jsonObject.getString("body")
        Glide.with(this).load(jsonObject.getString("image")).into(articleImage!!)


    }


}

Solution 2:

There is no JSONArray named 'article' in your response JSON. Thats why its causing the error remove this part

valjsonArray= jsonObject.getJSONArray("article")

        for (i in 0 until jsonArray.length()) {
            valjsonObject1= jsonArray.getJSONObject(i)
            varlistingObject= Article(
                jsonObject1.getInt("id"),
                jsonObject1.getString("name"),
                jsonObject1.getString("slug"),
                jsonObject1.getString("image"),
                jsonObject1.getString("body"),
                jsonObject1.getString("icon"),
                jsonObject1.getString("quote"),
                jsonObject1.getString("video"),
                jsonObject1.getString("user"),
                jsonObject1.getString("created_at"),
                jsonObject1.getString("updated_at")

            )
            list.add(listingObject)

        }

add this

Intid= jsonObject.getInt("id"),
               Stringname=  jsonObject.getString("name"),
               Stringslug=  jsonObject.getString("slug"),
               Stringimage=  jsonObject.getString("image"),
               Stringbody=  jsonObject.getString("body"),
               Stringicon=  jsonObject.getString("icon"),
               Stringquote=  jsonObject.getString("quote"),
               Stringvideo=  jsonObject.getString("video"),
               Stringuser= jsonObject.getString("user"),
               Stringcreated_at=  jsonObject.getString("created_at"),
               Stringupdated_at=  jsonObject.getString("updated_at")

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