Updated on 2026-08-14

tangem-sdk/src/main/java/com/tangem/tangem_sdk_new/DefaultSessionViewDelegate.kt

@@ -14,7 +14,6 @@ import com.tangem.common.CompletionResult
 import com.tangem.tangem_sdk_new.extensions.hide
 import com.tangem.tangem_sdk_new.extensions.show
 import com.tangem.tangem_sdk_new.nfc.NfcReader
-import com.tangem.tangem_sdk_new.ui.NfcEnableDialog
 import com.tangem.tangem_sdk_new.ui.TouchCardAnimation
 import kotlinx.android.synthetic.main.layout_touch_card.*
 import kotlinx.android.synthetic.main.nfc_bottom_sheet.*
@@ -35,7 +34,6 @@ class DefaultSessionViewDelegate(private val reader: NfcReader) : SessionViewDel
     override fun onNfcSessionStarted(cardId: String?, message: Message?) {
         reader.readingCancelled = false
         postUI { showReadingDialog(activity, cardId, message) }
-        if (!reader.nfcEnabled) NfcEnableDialog().show(activity)
     }
 
     private fun showReadingDialog(activity: Activity, cardId: String?, message: Message?) {

tangem-sdk/src/main/java/com/tangem/tangem_sdk_new/nfc/NfcManager.kt

@@ -11,6 +11,7 @@ import android.nfc.tech.IsoDep
 import android.os.Build
 import android.os.Bundle
 import com.tangem.Log
+import com.tangem.tangem_sdk_new.ui.NfcEnableDialog
 
 /**
  * Helps use NFC, leveraging Android NFC functionality.
@@ -22,6 +23,7 @@ class NfcManager : NfcAdapter.ReaderCallback {
     val reader = NfcReader()
     private var activity: Activity? = null
     private var nfcAdapter: NfcAdapter? = null
+    private var nfcEnableDialog: NfcEnableDialog? = null
 
     fun setCurrentActivity(activity: Activity) {
         this.activity = activity
@@ -47,16 +49,21 @@ class NfcManager : NfcAdapter.ReaderCallback {
     fun onResume() {
         val filter = IntentFilter(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED)
         activity?.registerReceiver(mBroadcastReceiver, filter)
-
-        if ((nfcAdapter == null || nfcAdapter?.isEnabled != true)) {
-            reader.nfcEnabled = false
-        } else {
-            reader.nfcEnabled = true
-            enableReaderMode()
-        }
+        handleNfcEnabled(nfcAdapter?.isEnabled == true)
         reader.manager = this
     }
 
+    private fun handleNfcEnabled(nfcEnabled: Boolean) {
+        reader.nfcEnabled = nfcEnabled
+        if (nfcEnabled) {
+            enableReaderMode()
+            nfcEnableDialog?.cancel()
+        } else {
+            nfcEnableDialog = NfcEnableDialog()
+            activity?.let{ nfcEnableDialog?.show(it) }
+        }
+    }
+
     fun onPause() {
         activity?.unregisterReceiver(mBroadcastReceiver)
         disableReaderMode()

tangem-sdk/src/main/java/com/tangem/tangem_sdk_new/ui/NfcEnableDialog.kt

@@ -8,16 +8,22 @@ import com.tangem.tangem_sdk_new.R
 
 class NfcEnableDialog {
 
+    private var dialog: AlertDialog? = null
+
     fun show(activity: Activity) {
         val builder = AlertDialog.Builder(activity)
         builder.setCancelable(false)
                 .setIcon(R.drawable.ic_action_nfc_gray)
                 .setTitle(R.string.dialog_nfc_enable_title)
                 .setMessage(R.string.dialog_nfc_enable_text)
-                .setPositiveButton(R.string.general_ok
-                ) { _, _ ->
-                    activity.startActivity(Intent(Settings.ACTION_NFC_SETTINGS))
-                }
-        builder.create().show()
+                .setPositiveButton(R.string.general_ok)
+                { _, _ -> activity.startActivity(Intent(Settings.ACTION_NFC_SETTINGS)) }
+                .setNegativeButton(R.string.dialog_cancel) { dialog, _ -> dialog.cancel() }
+        dialog = builder.create()
+        dialog?.show()
+    }
+
+    fun cancel() {
+        dialog?.cancel()
     }
 }

tangem-sdk/src/main/res/values/strings.xml

@@ -1,6 +1,7 @@
 <resources>
     <string name="app_name">Tangem Sdk</string>
     <string name="general_ok">OK</string>
+    <string name="dialog_cancel">Cancel</string>
     <string name="dialog_nfc_enable_title">Enable NFC?</string>
     <string name="dialog_nfc_enable_text">This app is useless when NFC is disabled. Reader mode depends on it. Hit OK to go to Settings, where you can enable NFC.</string>
     <string name="dialog_security_delay">Security delay</string>