Generate Aztec code with zxing

app/build.gradle.kts

@@ -50,6 +50,7 @@ dependencies {
     implementation(libs.androidx.navigation.fragment.ktx)
     implementation(libs.androidx.navigation.ui.ktx)
     implementation(libs.play.services.code.scanner)
+    implementation(libs.core)
     testImplementation(libs.junit)
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)

app/src/main/java/com/lhw/pdf/BarcodeGenerator.kt

@@ -0,0 +1,33 @@
+package com.lhw.pdf
+
+import android.graphics.Bitmap
+import android.graphics.Color
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.MultiFormatWriter
+import com.google.zxing.common.BitMatrix
+
+class BarcodeGenerator {
+    private val bgColor = Color.WHITE
+    private val fgColor = Color.BLACK
+
+    fun createBitmap(bitMatrix: BitMatrix): Bitmap {
+        val width = bitMatrix.width
+        val height = bitMatrix.height
+        val pixels = IntArray(width*height)
+        for (y in 0..<height) {
+            val yW = y*width
+            for (x in 0..<width) {
+                pixels[x+yW] = if (bitMatrix.get(x, y)) fgColor else bgColor
+            }
+        }
+        return Bitmap.createBitmap(pixels, width, height, Bitmap.Config.ARGB_8888)
+    }
+
+    fun encode(src: String): BitMatrix {
+        return MultiFormatWriter().encode(src, BarcodeFormat.AZTEC, 1, 1)
+    }
+
+    fun encodeBitmap(src: String): Bitmap {
+        return createBitmap(encode(src))
+    }
+}

app/src/main/java/com/lhw/pdf/ui/NetworkFragment.kt

@@ -1,16 +1,21 @@
 package com.lhw.pdf.ui
 
+import android.graphics.drawable.BitmapDrawable
+import android.media.Image
 import android.os.Bundle
 import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.ImageView
 import com.google.mlkit.vision.barcode.common.Barcode
 import com.google.mlkit.vision.codescanner.GmsBarcodeScannerOptions
 import com.google.mlkit.vision.codescanner.GmsBarcodeScanning
+import com.lhw.pdf.BarcodeGenerator
 import com.lhw.pdf.R
 import com.lhw.pdf.databinding.FragmentNetworkBinding
 import com.lhw.pdf.databinding.FragmentSlideshowBinding
+import kotlin.math.min
 
 class NetworkFragment : Fragment() {
     private var _binding: FragmentNetworkBinding? = null
@@ -23,6 +28,17 @@ class NetworkFragment : Fragment() {
         val root: View = binding.root
 
         binding.btnScanQrCode.setOnClickListener { getQrCode() }
+        val size = 800 //min(binding.linearLayout.width, binding.linearLayout.height)
+        val qrBitmap = BarcodeGenerator().encodeBitmap("pretend I encoded an //ip address:port in here")
+        val drawable = BitmapDrawable(resources, qrBitmap).apply { isFilterBitmap = false }
+        val imageView = ImageView(context).apply {
+            setImageDrawable(drawable)
+            scaleType = ImageView.ScaleType.FIT_CENTER
+            minimumWidth = size
+            minimumHeight = size
+            maxHeight = size
+        }
+        binding.linearLayout.addView(imageView)
         return root
     }
 

app/src/main/res/layout/fragment_network.xml

@@ -5,17 +5,25 @@
     android:layout_height="match_parent"
     tools:context=".ui.NetworkFragment">
 
-    <!-- TODO: Update blank fragment layout -->
-    <TextView
+
+    <LinearLayout
+        android:id="@+id/linear_layout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:text="Network fragment"
-        android:textAlignment="center" />
+        android:orientation="vertical">
 
-    <Button
-        android:id="@+id/btn_scan_qr_code"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Scan QR Code" />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Network fragment"
+            android:textAlignment="center" />
+
+        <Button
+            android:id="@+id/btn_scan_qr_code"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Scan QR Code" />
+
+    </LinearLayout>
 
 </FrameLayout>

gradle/libs.versions.toml

@@ -14,6 +14,7 @@ navigationFragmentKtx = "2.7.7"
 navigationUiKtx = "2.7.7"
 pdfboxAndroid = "2.0.27.0"
 playServicesCodeScanner = "16.1.0"
+core = "3.5.3"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -29,6 +30,7 @@ androidx-navigation-fragment-ktx = { group = "androidx.navigation", name = "navi
 androidx-navigation-ui-ktx = { group = "androidx.navigation", name = "navigation-ui-ktx", version.ref = "navigationUiKtx" }
 pdfbox-android = { module = "com.tom-roush:pdfbox-android", version.ref = "pdfboxAndroid" }
 play-services-code-scanner = { group = "com.google.android.gms", name = "play-services-code-scanner", version.ref = "playServicesCodeScanner" }
+core = { group = "com.google.zxing", name = "core", version.ref = "core" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }