MainActivity.kt
package com.cfsuman.jetpackcompose
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.lazy.*
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.*
import androidx.compose.runtime.Composable
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.font.FontFamily
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
import androidx.compose.ui.unit.sp
import kotlinx.coroutines.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
MainContent()
}
}
@Composable
fun MainContent(){
val list = (1..100).map { it.toString() }
val listState = rememberLazyListState()
val coroutineScope = rememberCoroutineScope()
Box(
modifier = Modifier.fillMaxSize()
) {
LazyColumn(
state = listState,
modifier = Modifier
.background(Color(0xFFFFFFFF))
.wrapContentHeight()
.fillMaxWidth(),
contentPadding = PaddingValues(12.dp),
verticalArrangement = Arrangement.spacedBy(8.dp)
) {
items(list){ txt ->
Card(
backgroundColor = Color(0xFF88540B),
modifier = Modifier
.fillMaxWidth(),
elevation = 8.dp,
shape = RoundedCornerShape(16.dp)
) {
Text(
text = txt,
fontWeight = FontWeight.Bold,
fontSize = 40.sp,
fontFamily = FontFamily.Cursive,
color = Color(0xFFFFFFFF),
textAlign = TextAlign.Center,
modifier = Modifier.padding(16.dp)
)
}
}
}
Column(
modifier = Modifier
.padding(16.dp)
.align(Alignment.CenterEnd),
verticalArrangement = Arrangement.spacedBy(8.dp)
) {
FloatingActionButton(
onClick = {
coroutineScope.launch {
listState.animateScrollToItem(24)
}
},
shape = RoundedCornerShape(50),
backgroundColor = Color(0xFF7BB661),
) {
Text(text = "25", color = Color.White)
}
FloatingActionButton(
onClick = {
coroutineScope.launch {
listState.animateScrollToItem(74)
}
},
shape = RoundedCornerShape(50),
backgroundColor = Color(0xFF7BB661),
) {
Text(text = "75", color = Color.White)
}
}
}
}
@Preview
@Composable
fun ComposablePreview(){
//MainContent()
}
}
- jetpack compose - LazyColumn scroll to top bottom
- jetpack compose - LazyColumn smooth scrolling
- jetpack compose - LazyColumn alternate item color
- jetpack compose - LazyColumn sticky header
- jetpack compose - Draw rounded rectangle on canvas
- jetpack compose - Draw oval on canvas
- jetpack compose - Rotate canvas
- jetpack compose - Tap listener
- jetpack compose - Press listener
- jetpack compose - Column vertical scrolling
- jetpack compose - TextField remove underline
- jetpack compose - TextField background color
- jetpack compose - TextField hint
- jetpack compose - Box rounded corners
- jetpack compose - Box center