Crear una aplicación en Android Studio que lee un fichero JSON con Kotlin | Operating systems, scripting, PowerShell and security

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyApplication"
        tools:targetApi="31">
        <activity
            android:name=".MainActivity"
            android:exported="true"
            android:label="@string/app_name"
            android:theme="@style/Theme.MyApplication">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools">

<uses-permission android:name="android.permission.INTERNET" />

<application

android:allowBackup="true"

android:dataExtractionRules="@xml/data_extraction_rules"

android:fullBackupContent="@xml/backup_rules"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

android:supportsRtl="true"

android:theme="@style/Theme.MyApplication"

tools:targetApi="31">

<activity

android:name=".MainActivity"

android:exported="true"

android:label="@string/app_name"

android:theme="@style/Theme.MyApplication">

<intent-filter>

</intent-filter>

</activity>

</application>

</manifest>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/loadButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Cargar JSON" />

    <TextView
        android:id="@+id/jsonTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Contenido JSON:"
        android:layout_below="@id/loadButton"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="20dp"/>
</RelativeLayout>

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<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent">

<Button

android:id="@+id/loadButton"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Cargar JSON" />

<TextView

android:id="@+id/jsonTextView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Contenido JSON:"

android:layout_below="@id/loadButton"

android:layout_centerHorizontal="true"

android:layout_marginTop="20dp"/>

</RelativeLayout>

package com.example.myapplication

import android.os.Bundle
import android.widget.Button
import android.widget.TextView
import androidx.activity.ComponentActivity
import com.android.volley.Request
import com.android.volley.Response
import com.android.volley.toolbox.StringRequest
import com.android.volley.toolbox.Volley

class MainActivity : ComponentActivity() {

    private lateinit var jsonTextView: TextView
    private val jsonUrl = "https://www.jesusninoc.com/rutinas2.json"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        jsonTextView = findViewById(R.id.jsonTextView)
        val loadButton: Button = findViewById(R.id.loadButton)

        loadButton.setOnClickListener {
            loadJSONFromUrl(jsonUrl)
        }
    }

    private fun loadJSONFromUrl(url: String) {
        val queue = Volley.newRequestQueue(this)

        val stringRequest = StringRequest(Request.Method.GET, url,
            Response.Listener<String> { response ->
                jsonTextView.text = response
            },
            Response.ErrorListener { error ->
                error.printStackTrace()
            })

        queue.add(stringRequest)
    }
}

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package com.example.myapplication

import android.os.Bundle

import android.widget.Button

import android.widget.TextView

import androidx.activity.ComponentActivity

import com.android.volley.Request

import com.android.volley.Response

import com.android.volley.toolbox.StringRequest

import com.android.volley.toolbox.Volley

class MainActivity : ComponentActivity() {

private lateinit var jsonTextView: TextView

private val jsonUrl = "https://www.jesusninoc.com/rutinas2.json"

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

jsonTextView = findViewById(R.id.jsonTextView)

val loadButton: Button = findViewById(R.id.loadButton)

loadButton.setOnClickListener {

loadJSONFromUrl(jsonUrl)

}

private fun loadJSONFromUrl(url: String) {

val queue = Volley.newRequestQueue(this)

val stringRequest = StringRequest(Request.Method.GET, url,

Response.Listener<String> { response ->

jsonTextView.text = response

},

Response.ErrorListener { error ->

error.printStackTrace()

})

queue.add(stringRequest)

}

Crear una aplicación en Android Studio que lee un fichero JSON con Kotlin (Red, Kotlin)

AndroidManifest.xml

activity_main.xml

MainActivity.kt

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