جت‌پک کامپوز در اندروید: نمایش عکس با تابع Image

Image(
    painter: Painter|bitmap: ImageBitmap|vector: ImageVector,
    contentDescription: String,
    alpha: Float,
    alignment: Alignment,
    contentScale: ContentScale
    )
                

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.Image
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContent {
            Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
                IranCityDistances(modifier = Modifier
                    .padding(innerPadding)
                )
            }
        }
    }
}

@Composable
fun IranCityDistances(modifier: Modifier = Modifier){
    Box(modifier = modifier
        .padding()
        .fillMaxSize()
        .background(Color.White),
        contentAlignment = Alignment.Center
    ) {
        CityDistances(Modifier)
        IranMap()
    }
}

@Preview
@Composable
fun IranCityDistancesPreview(){
    IranCityDistances()
}

@Composable
fun IranMap(modifier: Modifier = Modifier){
    Image(
        painter = painterResource(R.drawable.blank_map_iran),
        contentDescription = null,
        contentScale = ContentScale.Crop,
        modifier = modifier.fillMaxWidth(),
        alpha = 0.45f,
        alignment = Alignment.Center
    )
}

@Composable
fun CityDistances(modifier: Modifier = Modifier) {
    Column(modifier) {
        CitiesRow()
        Distances()
    }
}

@Preview
@Composable
fun CityDistancesPreview() {
    CityDistances(Modifier)
}

@Composable
fun CitiesRow(modifier: Modifier = Modifier) {
    Row(
        modifier
            .fillMaxWidth()
            .background(Color(0xFFF5F5F5)),
        horizontalArrangement = Arrangement.End
    ) {
        for (city in cities) {
            Text(
                text = city,
                textAlign = TextAlign.Center,
                fontWeight = FontWeight.Bold,
                modifier = Modifier.padding(10.dp)
            )
        }
    }
}

@Composable
fun CitiesColumn(modifier: Modifier = Modifier) {
    Column(modifier) {
        for (city in cities)
            Text(
                text = city,
                color = Color(0xFFFAFAFA),
                modifier = Modifier.padding(bottom = 16.dp, top = 16.dp),
                fontWeight = FontWeight.Bold
            )
    }
}

@Composable
fun Distances(modifier: Modifier = Modifier) {

    Row(
        modifier
            .fillMaxWidth()
            .background(Color(0xFF212121)),
        horizontalArrangement = Arrangement.End
    ) {
        CitiesColumn()
        for (row in distances.indices) {

            Column {
                for (col in distances[row].indices) {
                    val distance = distances[row][col]
                    Text(
                        text = distance.toString(),
                        color = Color(0xFFFAFAFA),
                        textAlign = TextAlign.Center,
                        modifier = Modifier.padding(horizontal = 20.dp, vertical = 16.dp)
                    )
                }
            }
        }
    }
}