MainActivity.kt
package com.cfsuman.jetpackcompose
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.compose.animation.animateColorAsState
import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.detectTapGestures
import androidx.compose.foundation.layout.*
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.input.pointer.pointerInput
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
MainContent()
}
}
@Composable
fun MainContent(){
Column(
modifier = Modifier
.background(Color(0xFFEDEAE0))
.fillMaxSize(),
verticalArrangement = Arrangement.Center,
horizontalAlignment = Alignment.CenterHorizontally
) {
val isLighter = remember { mutableStateOf(true) }
val color = animateColorAsState(
targetValue = if (isLighter.value)
Color(0xFFB2BEB5) else Color(0xFFFF0800)
)
Text(
text = "Double Tap Me",
fontSize = 50.sp,
color = color.value,
modifier = Modifier
.padding(25.dp)
.pointerInput(Unit) {
detectTapGestures(
onDoubleTap = {
isLighter.value = !isLighter.value
}
)
}
)
}
}
@Preview
@Composable
fun ComposablePreview(){
//MainContent()
}
}


- jetpack compose - AnimateColorAsState duration
- jetpack compose - AnimateDpAsState
- jetpack compose - Infinite float animation
- jetpack compose - Animation start delay
- jetpack compose - Rotate animation
- jetpack compose - Draw circle on canvas
- jetpack compose - Draw rectangle on canvas
- jetpack compose - Draw rounded rectangle on canvas
- jetpack compose - Canvas withTransform
- jetpack compose - Canvas inset
- jetpack compose - Draw arc on canvas
- jetpack compose - Long press listener
- jetpack compose - Tap listener
- jetpack compose - Press listener
- jetpack compose - Column vertical scrolling