Tugas 6 - Image Scroll

Nama    : Syaiful Bahri Dirgantara

Kelas    : PPB F

Pendahuluan

Pada pertemuan ini dijelaskan bagaimana membuat image scroll menggunakan material design. Digunakan Card untuk membuat image scroll ini. Dalam pembelajarannya juga disertakan referensi video dari You Tube. Berikut hasil implementasi saya.

Sebelum scrolling :

Setelah scrolling :

Source Code :

1. MainActivity.kt

package com.example.affirmations

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material3.Card
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.affirmations.data.Datasource
import com.example.affirmations.model.Affirmation
import com.example.affirmations.ui.theme.AffirmationsTheme

class MainActivity : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            AffirmationsTheme {
                // A surface container using the 'background' color from the theme
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colorScheme.background
                ) {
                    AffirmationsApp()
                }
            }
        }
    }
}

@Composable
fun AffirmationsApp() {
    AffirmationList(
        affirmationList = Datasource().loadAffirmations(),
    )
}

@Composable
fun AffirmationList(affirmationList: List<Affirmation>, modifier: Modifier = Modifier) {
    LazyColumn(modifier = modifier) {
        items(affirmationList) { affirmation ->
            AffirmationCard(
                affirmation = affirmation,
                modifier = Modifier.padding(8.dp)
            )
        }
    }
}

@Composable
fun AffirmationCard(affirmation: Affirmation, modifier: Modifier = Modifier) {
    Card(modifier = modifier) {
        Column {
            Image(
                painter = painterResource(affirmation.imageResourceId),
                contentDescription = stringResource(affirmation.stringResourceId),
                modifier = Modifier
                    .fillMaxWidth()
                    .height(194.dp),
                contentScale = ContentScale.Crop
            )
            Text(
                text = LocalContext.current.getString(affirmation.stringResourceId),
                modifier = Modifier.padding(16.dp),
                style = MaterialTheme.typography.headlineSmall
            )
        }
    }
}

@Preview
@Composable
private fun AffirmationCardPreview() {
    AffirmationCard(Affirmation(R.string.affirmation1, R.drawable.image1))
}

2. Affirmations.kt dalam package model

package com.example.affirmations.model

import androidx.annotation.DrawableRes
import androidx.annotation.StringRes

data class Affirmation(
    @StringRes val stringResourceId: Int,
    @DrawableRes val imageResourceId: Int
)

3. Datasource.kt dalam package data

package com.example.affirmations.data

import com.example.affirmations.R
import com.example.affirmations.model.Affirmation

class Datasource() {
    fun loadAffirmations(): List<Affirmation> {
        return listOf<Affirmation>(
            Affirmation(R.string.affirmation1, R.drawable.image1),
            Affirmation(R.string.affirmation2, R.drawable.image2),
            Affirmation(R.string.affirmation3, R.drawable.image3),
            Affirmation(R.string.affirmation4, R.drawable.image4),
            Affirmation(R.string.affirmation5, R.drawable.image5),
            Affirmation(R.string.affirmation6, R.drawable.image6),
            Affirmation(R.string.affirmation7, R.drawable.image7),
            Affirmation(R.string.affirmation8, R.drawable.image8),
            Affirmation(R.string.affirmation9, R.drawable.image9),
            Affirmation(R.string.affirmation10, R.drawable.image10))
    }
}