How to determine if a Json is a JsonObject or JsonArray in Android

In this android programming source code example, we are going to determine if a Json is a JsonObject or JsonArray in Android.

You can copy and adopt this source code example to your android project without reinventing the wheel.

Below is a step by step source code to determine if a Json is a JsonObject or JsonArray in Android.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".json.Json9">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="JSONArray or JSONObject"
        android:textSize="20sp"
        android:paddingBottom="10dp"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:id="@+id/button"
        android:text="Click"/>

</LinearLayout>

MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;

public class Json9 extends AppCompatActivity {

    String jsonString = "{\"firstName\":\"Peter\",\"Country\":\"Nigeria\",\"State\":\"Lagos State\"}";
    Object json = new JSONTokener(jsonString).nextValue();

    public Json9() throws JSONException {
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_json9);

        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (json instanceof JSONObject) {
                    Toast.makeText(getApplicationContext(), "JSON is an object", Toast.LENGTH_LONG).show();
                }else if (json instanceof JSONArray){
                    Toast.makeText(getApplicationContext(), "Json is an Array", Toast.LENGTH_LONG).show();
                }
            }
        });
    }
}

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