we now generate real qr codes from the current channel

app/build.gradle

@@ -114,5 +114,9 @@ dependencies {
     // add SDKs for any other desired Firebase products
     // https://firebase.google.com/docs/android/setup#available-libraries
 
+    // barcode support
+    implementation('com.google.zxing:core:3.4.0')
+    implementation('com.journeyapps:zxing-android-embedded:3.2.0@aar')
+
     implementation project(':geeksville-androidlib')
 }

app/src/main/java/com/geeksville/mesh/model/UIState.kt

@@ -1,6 +1,7 @@
 package com.geeksville.mesh.model
 
 import android.content.Context
+import android.graphics.Bitmap
 import android.os.RemoteException
 import android.util.Base64
 import androidx.compose.mutableStateOf
@@ -9,9 +10,12 @@ import com.geeksville.android.Logging
 import com.geeksville.mesh.IMeshService
 import com.geeksville.mesh.MeshProtos
 import com.geeksville.mesh.ui.getInitials
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.MultiFormatWriter
+import com.journeyapps.barcodescanner.BarcodeEncoder
 
 /// FIXME - figure out how to merge this staate with the AppStatus Model
-object UIState: Logging {
+object UIState : Logging {
 
     /// Kinda ugly - created in the activity but used from Compose - figure out if there is a cleaner way GIXME
     // lateinit var googleSignInClient: GoogleSignInClient
@@ -38,6 +42,15 @@ object UIState: Logging {
             return "https://www.meshtastic.org/c/$enc"
         }
 
+    val channelQR
+        get(): Bitmap {
+            val multiFormatWriter = MultiFormatWriter()
+
+            val bitMatrix = multiFormatWriter.encode(channelUrl, BarcodeFormat.QR_CODE, 192, 192);
+            val barcodeEncoder = BarcodeEncoder()
+            return barcodeEncoder.createBitmap(bitMatrix)
+        }
+
     // clean up all this nasty owner state management FIXME
     fun setOwner(context: Context, s: String? = null) {
 

app/src/main/java/com/geeksville/mesh/service/RadioInterfaceService.kt

@@ -225,6 +225,7 @@ class RadioInterfaceService : Service(), Logging {
             receivedPacketsLog.write(p)
             receivedPacketsLog.flush()
         }
+
         broadcastReceivedFromRadio(
             this,
             p

app/src/main/java/com/geeksville/mesh/ui/Channel.kt

@@ -1,11 +1,16 @@
 package com.geeksville.mesh.ui
 
+import android.graphics.Bitmap
+import android.os.Build
 import androidx.compose.Composable
 import androidx.compose.ambient
 import androidx.ui.core.ContextAmbient
 import androidx.ui.core.Text
 import androidx.ui.foundation.Clickable
 import androidx.ui.foundation.DrawImage
+import androidx.ui.graphics.*
+import androidx.ui.graphics.colorspace.ColorSpace
+import androidx.ui.graphics.colorspace.ColorSpaces
 import androidx.ui.layout.*
 import androidx.ui.material.Button
 import androidx.ui.material.MaterialTheme
@@ -18,12 +23,56 @@ import com.geeksville.android.GeeksvilleApplication
 import com.geeksville.android.Logging
 import com.geeksville.android.toast
 import com.geeksville.mesh.R
+import com.geeksville.mesh.model.UIState
 
 /// The Compose IDE preview doesn't like the protobufs
 data class Channel(val name: String, val num: Int)
 
 object ChannelLog : Logging
 
+/// Borrowed from Compose
+class AndroidImage(val bitmap: Bitmap) : Image {
+
+    /**
+     * @see Image.width
+     */
+    override val width: Int
+        get() = bitmap.width
+
+    /**
+     * @see Image.height
+     */
+    override val height: Int
+        get() = bitmap.height
+
+    override val config: ImageConfig get() = ImageConfig.Argb8888
+
+    /**
+     * @see Image.colorSpace
+     */
+    override val colorSpace: ColorSpace
+        get() = ColorSpaces.Srgb
+
+    /**
+     * @see Image.hasAlpha
+     */
+    override val hasAlpha: Boolean
+        get() = bitmap.hasAlpha()
+
+    /**
+     * @see Image.nativeImage
+     */
+    override val nativeImage: NativeImage
+        get() = bitmap
+
+    /**
+     * @see
+     */
+    override fun prepareToDraw() {
+        bitmap.prepareToDraw()
+    }
+}
+
 @Composable
 fun ChannelContent(channel: Channel = Channel("Default", 7)) {
     val typography = MaterialTheme.typography()
@@ -37,7 +86,10 @@ fun ChannelContent(channel: Channel = Channel("Default", 7)) {
         )
 
         Row(modifier = LayoutGravity.Center) {
-            val image = imageResource(id = R.drawable.qrcode)
+            // simulated qr code
+            // val image = imageResource(id = R.drawable.qrcode)
+            val image = AndroidImage(UIState.channelQR)
+
             Container(modifier = LayoutGravity.Center + LayoutSize.Min(200.dp, 200.dp)) {
                 DrawImage(image = image)
             }