android app fetch website data kotlin coding with full path 24 nought

android app fetch website data kotlin” coding with full path 24 nought

Here’s a full Kotlin project setup to fetch data from a website using Retrofit in an Android app. android app fetch website data kotlin coding with full path 24 nought

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Project Structure

app/
 ├── manifests/
 │    ├── AndroidManifest.xml
 ├── java/com/example/appname/
 │    ├── MainActivity.kt
 │    ├── ApiService.kt
 │    ├── Post.kt
 │    ├── RetrofitClient.kt
 ├── res/
 │    ├── layout/activity_main.xml
 ├── build.gradle (Module: app)
 ├── build.gradle (Project)

1. Add Dependencies in build.gradle (Module: app)

dependencies {
    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation 'com.squareup.retrofit2:retrofit:2.9.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.6.2'
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.7.3'
}

2. Update AndroidManifest.xml with Internet Permission

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

3. Create Post.kt (Data Model)

package com.example.appname

data class Post(
    val userId: Int,
    val id: Int,
    val title: String,
    val body: String
)

4. Create ApiService.kt (API Interface)

package com.example.appname

import retrofit2.http.GET

interface ApiService {
    @GET("posts")
    suspend fun getPosts(): List<Post>
}

5. Create RetrofitClient.kt (Retrofit Instance)

package com.example.appname

import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory

object RetrofitClient {
    private const val BASE_URL = "https://jsonplaceholder.typicode.com/"

    val instance: ApiService by lazy {
        Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(GsonConverterFactory.create())
            .build()
            .create(ApiService::class.java)
    }
}

6. Update activity_main.xml (UI Layout)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp">

    <TextView
        android:id="@+id/tvData"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Fetching data..."
        android:textSize="16sp"
        android:textColor="#000000" />

</LinearLayout>

7. Update MainActivity.kt (Fetch and Display Data)

package com.example.appname

import android.os.Bundle
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.lifecycleScope
import kotlinx.coroutines.launch

class MainActivity : AppCompatActivity() {
    private lateinit var tvData: TextView

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

        tvData = findViewById(R.id.tvData)

        // Fetch data using Coroutines
        lifecycleScope.launch {
            try {
                val posts = RetrofitClient.instance.getPosts()
                tvData.text = posts.joinToString("\n\n") { it.title }
            } catch (e: Exception) {
                tvData.text = "Error: ${e.message}"
            }
        }
    }
}

Features of this Code:

Uses Retrofit for API calls
Uses Coroutines for async operations
Displays API response on a TextView
Requires only Internet Permission

This project will fetch JSON data from https://jsonplaceholder.typicode.com/posts and display it in the app.

Let me know if you need any modifications!