Draw App

import android.os.Bundle
        import androidx.activity.ComponentActivity
        import androidx.activity.compose.setContent
        import androidx.compose.foundation.Canvas
        import androidx.compose.foundation.gestures.detectDragGestures
        import androidx.compose.foundation.layout.fillMaxSize
        import androidx.compose.runtime.Composable
        import androidx.compose.runtime.mutableStateOf
        import androidx.compose.runtime.remember
        import androidx.compose.ui.Modifier
        import androidx.compose.ui.graphics.Color
        import androidx.compose.ui.graphics.Path
        import androidx.compose.ui.graphics.drawscope.Stroke
        import androidx.compose.ui.input.pointer.pointerInput
        import com.neco_desarrollo.drawapp.ui.theme.DrawAppTheme

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            DrawAppTheme {
                DrawCanvas()
            }
        }
    }
}

@Composable
fun DrawCanvas() {
    val tempPath = Path()
    val path = remember {
        mutableStateOf(Path())
    }

    Canvas(
        modifier = Modifier
            .fillMaxSize()
            .pointerInput(true) {
                detectDragGestures { change, dragAmount ->
                    tempPath.moveTo(
                        change.position.x - dragAmount.x,
                        change.position.y - dragAmount.y
                    )
                    tempPath.lineTo(
                        change.position.x,
                        change.position.y
                    )

                    path.value = Path().apply {
                        addPath(tempPath)
                    }
                }
            }
    ){
        drawPath(
            path.value,
            color = Color.Red,
            style = Stroke(5f)
        )
    }
}