1 files changed, 56 insertions, 0 deletions
diff --git a/wallee-c2ec/app/src/main/java/ch/bfh/habej2/wallee_c2ec/QRCodeComposable.kt b/wallee-c2ec/app/src/main/java/ch/bfh/habej2/wallee_c2ec/QRCodeComposable.kt
new file mode 100644
index 0000000..3fe6004
--- /dev/null
+++ b/wallee-c2ec/app/src/main/java/ch/bfh/habej2/wallee_c2ec/QRCodeComposable.kt
@@ -0,0 +1,56 @@
+package ch.bfh.habej2.wallee_c2ec
+
+import android.graphics.Bitmap
+import android.graphics.Color
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.asImageBitmap
+import androidx.compose.ui.platform.LocalConfiguration
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.min
+import com.google.zxing.BarcodeFormat.QR_CODE
+import com.google.zxing.qrcode.QRCodeWriter
+
+@Composable
+fun QRCode(qrCodeContent: String) {
+
+    Column {
+
+        val qrCodeSize = getQrCodeSize()
+        val btmp = makeQrCode(qrCodeContent).asImageBitmap()
+
+        Image(
+            modifier = androidx.compose.ui.Modifier
+                .size(qrCodeSize)
+                .padding(vertical = 8.dp),
+            bitmap = btmp,
+            contentDescription = "Scan the QR Code to start withdrawal",
+        )
+    }
+}
+
+@Composable
+fun getQrCodeSize(): Dp {
+    val configuration = LocalConfiguration.current
+    val screenHeight = configuration.screenHeightDp.dp
+    val screenWidth = configuration.screenWidthDp.dp
+    return min(screenHeight, screenWidth)
+}
+
+private fun makeQrCode(text: String, size: Int = 256): Bitmap {
+    val qrCodeWriter = QRCodeWriter()
+    val bitMatrix = qrCodeWriter.encode(text, QR_CODE, size, size)
+    val height = bitMatrix.height
+    val width = bitMatrix.width
+    val bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565)
+    for (x in 0 until width) {
+        for (y in 0 until height) {
+            bmp.setPixel(x, y, if (bitMatrix.get(x, y)) Color.BLACK else Color.WHITE)
+        }
+    }
+    return bmp
+}
+\ No newline at end of file