Crear una aplicación en Android Studio que lee un fichero JSON con fechas de cumpleaños e indica las personas que cumplen años en el día de hoy | Operating systems, scripting, PowerShell and security

Android, Kotlin, Lo mejor

Contenidos

Fichero cumple.json
Añadir las siguiente dependencias al fichero build.gradle.kts
Añadir los permisos al fichero AndroidManifest.xml
MainActivity.kt

Fichero cumple.json

[
    {
        "nombre": "Juan",
        "fecha_nacimiento": "1990-12-18"
    },
    {
        "nombre": "María",
        "fecha_nacimiento": "1985-09-28"
    },
    {
        "nombre": "Pedro",
        "fecha_nacimiento": "1995-02-10"
    },
    {
        "nombre": "Ana",
        "fecha_nacimiento": "1988-12-03"
    },
    {
        "nombre": "Luisa",
        "fecha_nacimiento": "1976-12-18"
    }
]

[

{

"nombre": "Juan",

"fecha_nacimiento": "1990-12-18"

{

"nombre": "María",

"fecha_nacimiento": "1985-09-28"

{

"nombre": "Pedro",

"fecha_nacimiento": "1995-02-10"

{

"nombre": "Ana",

"fecha_nacimiento": "1988-12-03"

{

"nombre": "Luisa",

"fecha_nacimiento": "1976-12-18"

}

]

Añadir las siguiente dependencias al fichero build.gradle.kts

implementation("com.squareup.okhttp3:okhttp:4.9.3")
implementation("com.google.code.gson:gson:2.8.8")

1 2	implementation("com.squareup.okhttp3:okhttp:4.9.3") implementation("com.google.code.gson:gson:2.8.8")

Añadir los permisos al fichero AndroidManifest.xml

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

1 2	<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

MainActivity.kt

package com.example.myapplication

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.material3.Text
import androidx.compose.runtime.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import com.google.gson.Gson
import com.google.gson.reflect.TypeToken
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.Response
import java.io.IOException
import java.text.SimpleDateFormat
import java.util.*

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            BirthdayApp()
        }
    }
}

@Composable
fun BirthdayApp() {
    val context = LocalContext.current
    var personsWithBirthdayToday by remember { mutableStateOf<List<Person>>(emptyList()) }

    LaunchedEffect(true) {
        personsWithBirthdayToday = withContext(Dispatchers.IO) {
            findPeopleWithBirthdayToday(context)
        }
    }

    Column(
        modifier = Modifier.fillMaxSize(),
        verticalArrangement = Arrangement.Center,
        horizontalAlignment = Alignment.CenterHorizontally
    ) {
        Text("Personas con cumpleaños hoy:")
        personsWithBirthdayToday.forEach { person ->
            Text(person.nombre)
        }
    }
}

fun findPeopleWithBirthdayToday(context: android.content.Context): List<Person> {
    val jsonString = readJsonFromUrl("https://www.jesusninoc.com/cumple.json")

    val gson = Gson()
    val listType = object : TypeToken<List<Person>>() {}.type
    val persons: List<Person> = gson.fromJson(jsonString, listType)

    val currentDate = Calendar.getInstance().time
    val dateFormatter = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())

    val peopleWithBirthdayToday = mutableListOf<Person>()

    persons.forEach { person ->
        val birthDate = dateFormatter.parse(person.fecha_nacimiento)
        if (birthDate != null && isSameDayAndMonth(birthDate, currentDate)) {
            peopleWithBirthdayToday.add(person)
        }
    }
    return peopleWithBirthdayToday
}

fun readJsonFromUrl(url: String): String {
    val client = OkHttpClient()
    val request = Request.Builder()
        .url(url)
        .build()

    val response: Response
    try {
        response = client.newCall(request).execute()
        return response.body?.string() ?: ""
    } catch (e: IOException) {
        e.printStackTrace()
        return ""
    }
}

fun isSameDayAndMonth(date1: Date, date2: Date): Boolean {
    val cal1 = Calendar.getInstance().apply { time = date1 }
    val cal2 = Calendar.getInstance().apply { time = date2 }

    val dateFormatter = SimpleDateFormat("dd-MM", Locale.getDefault())

    val dayAndMonth1 = dateFormatter.format(cal1.time)
    val dayAndMonth2 = dateFormatter.format(cal2.time)

    return dayAndMonth1 == dayAndMonth2
}

data class Person(
    val nombre: String,
    val fecha_nacimiento: String
)

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package com.example.myapplication

import android.os.Bundle

import androidx.activity.ComponentActivity

import androidx.activity.compose.setContent

import androidx.compose.foundation.layout.*

import androidx.compose.material3.Text

import androidx.compose.runtime.*

import androidx.compose.ui.Alignment

import androidx.compose.ui.Modifier

import androidx.compose.ui.platform.LocalContext

import com.google.gson.Gson

import com.google.gson.reflect.TypeToken

import kotlinx.coroutines.Dispatchers

import kotlinx.coroutines.withContext

import okhttp3.OkHttpClient

import okhttp3.Request

import okhttp3.Response

import java.io.IOException

import java.text.SimpleDateFormat

import java.util.*

class MainActivity : ComponentActivity() {

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContent {

BirthdayApp()

}

@Composable

fun BirthdayApp() {

val context = LocalContext.current

var personsWithBirthdayToday by remember { mutableStateOf<List<Person>>(emptyList()) }

LaunchedEffect(true) {

personsWithBirthdayToday = withContext(Dispatchers.IO) {

findPeopleWithBirthdayToday(context)

}

Column(

modifier = Modifier.fillMaxSize(),

verticalArrangement = Arrangement.Center,

horizontalAlignment = Alignment.CenterHorizontally

) {

Text("Personas con cumpleaños hoy:")

personsWithBirthdayToday.forEach { person ->

Text(person.nombre)

}

fun findPeopleWithBirthdayToday(context: android.content.Context): List<Person> {

val jsonString = readJsonFromUrl("https://www.jesusninoc.com/cumple.json")

val gson = Gson()

val listType = object : TypeToken<List<Person>>() {}.type

val persons: List<Person> = gson.fromJson(jsonString, listType)

val currentDate = Calendar.getInstance().time

val dateFormatter = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())

val peopleWithBirthdayToday = mutableListOf<Person>()

persons.forEach { person ->

val birthDate = dateFormatter.parse(person.fecha_nacimiento)

if (birthDate != null && isSameDayAndMonth(birthDate, currentDate)) {

peopleWithBirthdayToday.add(person)

}

return peopleWithBirthdayToday

}

fun readJsonFromUrl(url: String): String {

val client = OkHttpClient()

val request = Request.Builder()

.url(url)

.build()

val response: Response

try {

response = client.newCall(request).execute()

return response.body?.string() ?: ""

} catch (e: IOException) {

e.printStackTrace()

return ""

}

fun isSameDayAndMonth(date1: Date, date2: Date): Boolean {

val cal1 = Calendar.getInstance().apply { time = date1 }

val cal2 = Calendar.getInstance().apply { time = date2 }

val dateFormatter = SimpleDateFormat("dd-MM", Locale.getDefault())

val dayAndMonth1 = dateFormatter.format(cal1.time)

val dayAndMonth2 = dateFormatter.format(cal2.time)

return dayAndMonth1 == dayAndMonth2

}

data class Person(

val nombre: String,

val fecha_nacimiento: String

)

Crear una aplicación en Android Studio que lee un fichero JSON con fechas de cumpleaños e indica las personas que cumplen años en el día de hoy (Lo mejor, Kotlin, Android)

Fichero cumple.json

Añadir las siguiente dependencias al fichero build.gradle.kts

Añadir los permisos al fichero AndroidManifest.xml

MainActivity.kt

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