Membuat Animated Scroll Menggunakan Material Design

Muhammad Ferdian Iqbal/5025201020
PPB I / Github

Pada kesempatan kali ini saya akan mencoba membuat scroll animasi menggunakan Material Design. Sebelumnya, Anda perlu melakukan cloning repository pada branch starter pada Link berikut. Command yang dapat digunakan untuk melakukan cloning adalah git clone -b starter https://github.com/google-developer-training/basic-android-kotlin-compose-training-affirmations.

Selanjutnya, Anda dapat membuat direktori baru di com.example.affirmations yaitu, model. Di dalam direktori model dapat dibuat file class baru yaitu Affirmation.kt. Selanjutnya memasukkan kode program berikut.

package com.example.affirmations.model

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

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

Selanjutnya, Anda dapat memodifikasi kode program pada file Datasource.kt di dalam direktori data. Modifikasi kode programnya adalah sebagai berikut.

/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.example.affirmations.data

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

/**
 * [Datasource] generates a list of [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))
    }
}

Selanjutnya, Anda dapat memodifikasi file MainActivity.kt. Modifikasi kode program tersebut adalah sebagai berikut.

/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
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 AffirmationCard(affirmation: Affirmation, modifier: Modifier = Modifier) {
    Card(modifier = modifier) {
        Column {
            Image(
                painter = painterResource(id = affirmation.imageResourceId),
                contentDescription = stringResource(id = 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
            )
        }
    }
}

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

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

Setelah itu, Anda dapat mencoba untuk menjalankan aplikasinya. Hasil dari program tersebut akan menampilkan list gambar yang dapat discroll. Anda dapat memodifikasi teks pada setiap gambar pada file strings.xml dan mengubah gambar sesuai yang diinginkan

Terima kasih atas waktunya untuk membaca tutorial saya, sampai jumpa pada tutorial selanjutnya.

Muhammad Ferdian Iqbal/5025201020
PPB I / Github