Compose QR Code

A simple, flexible QR code renderer for Jetpack Compose - by Lightspark

Usage

First install it from Maven Central:

Groovy:

dependencies {
    implementation "com.lightspark:compose-qr-code:1.0.1"
}

kts:

dependencies {
    implementation("com.lightspark:compose-qr-code:1.0.1")
}

Then, use it in your code! Here's a plain ol' boring QR Code:

```kotlin @Composable fun BoringPreview() { QrCodeView( data = "https://github.com/lightsparkdev/compose-qr-code", modifier = Modifier.size(300.dp) ) } ```

Meh... Let's spice it up a bit with a smiley face overlay:

```kotlin @Composable fun SmileyPreview() { QrCodeView( data = "https://github.com/lightsparkdev/compose-qr-code", modifier = Modifier.size(300.dp) ) { Smile( modifier = Modifier.fillMaxSize(), backgroundColor = Color.Yellow, smileColor = Color.Black ) } } ```

Cool, I guess we're getting somewhere. What about dark mode? Maybe we can also add some style with circular dots in the qr code...

```kotlin @Composable fun SmileyDarkPreview() { QrCodeView( data = "https://github.com/lightsparkdev/compose-qr-code", modifier = Modifier.size(300.dp), colors = QrCodeColors( background = Color.Black, foreground = Color.White ), dotShape = DotShape.Circle ) { Box( contentAlignment = Alignment.Center, modifier = Modifier .fillMaxSize() .clip(RoundedCornerShape(8.dp)) .background(Color.White) .padding(8.dp) .clip(RoundedCornerShape(8.dp)) .background(Color.Green) ) { Smile(modifier = Modifier.fillMaxSize(0.5f)) } } } ```

That's not bad! Let's add some even cooler styles, though. cracks fingers...

```kotlin @Composable fun PurpleAndGold() { val purple = Color(0xFF552583) val gold = Color(0xFFFDB927) QrCodeView( data = "https://github.com/lightsparkdev/compose-qr-code", modifier = Modifier.size(300.dp), colors = QrCodeColors( background = purple, foreground = gold ), dotShape = DotShape.Circle ) { Box( contentAlignment = Alignment.Center, modifier = Modifier .fillMaxSize() .clip(CircleShape) .background(purple) ) { BasicText( text = "L", style = TextStyle.Default.copy( color = gold, fontSize = 42.sp, fontWeight = FontWeight.ExtraBold, fontStyle = FontStyle.Italic, fontFamily = FontFamily.Serif ) ) } } } ```

Acknowledgements

This libraries relies on the great, reliable zxing library for QR code data generation.