feat: added code scanning

mobile/src/main/java/ru/omni_devel/cards/AddCardActivity.kt

@@ -10,10 +10,25 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
 import com.google.zxing.BarcodeFormat
+import com.journeyapps.barcodescanner.ScanContract
+import com.journeyapps.barcodescanner.ScanOptions
 
 class AddCardActivity : AppCompatActivity() {
     private lateinit var db: DbHelper
 
+    private val barcodeLauncher = registerForActivityResult(ScanContract()) { result ->
+        if (result.contents != null) {
+            val codeTypes = BarcodeFormat.entries.map { it.name }
+            val codeTypeIndex = codeTypes.indexOf(result.formatName)
+
+            if (codeTypeIndex >= 0) {
+                findViewById<Spinner>(R.id.cardCodeTypeSelector).setSelection(codeTypeIndex)
+            }
+
+            findViewById<EditText>(R.id.cardValueInput).setText(result.contents)
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
@@ -28,6 +43,7 @@ class AddCardActivity : AppCompatActivity() {
 
         val cardNameInput: EditText = findViewById(R.id.cardNameInput)
         val cardValueInput: EditText = findViewById(R.id.cardValueInput)
+        val scanCodeButton: Button = findViewById(R.id.scanCodeButton)
         val cardCodeTypeSelector: Spinner = findViewById(R.id.cardCodeTypeSelector)
         val saveCardButton: Button = findViewById(R.id.saveCardButton)
 
@@ -36,6 +52,14 @@ class AddCardActivity : AppCompatActivity() {
         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
         cardCodeTypeSelector.adapter = adapter
 
+        scanCodeButton.setOnClickListener {
+            val options = ScanOptions()
+            options.setPrompt("Scan code")
+            options.setBeepEnabled(false)
+            options.setOrientationLocked(false)
+            barcodeLauncher.launch(options)
+        }
+
         saveCardButton.setOnClickListener {
             val cardName = cardNameInput.text.toString()
             val cardValue = cardValueInput.text.toString()