Don't talk about NFC if it is not supported

4 files changed, 15 insertions, 4 deletions

diff --git a/app/src/main/java/net/taler/merchantpos/NfcManager.kt b/app/src/main/java/net/taler/merchantpos/NfcManager.kt
index d6b40b7..1d21795 100644
--- a/app/src/main/java/net/taler/merchantpos/NfcManager.kt
+++ b/app/src/main/java/net/taler/merchantpos/NfcManager.kt
@@ -20,6 +20,13 @@ class NfcManager : NfcAdapter.ReaderCallback {
         const val TAG = "taler-merchant"
 
         /**
+         * Returns true if NFC is supported and false otherwise.
+         */
+        fun hasNfc(context: Context): Boolean {
+            return getNfcAdapter(context) != null
+        }
+
+        /**
          * Enables NFC reader mode. Don't forget to call [stop] afterwards.
          */
         fun start(activity: Activity, nfcManager: NfcManager) {
diff --git a/app/src/main/java/net/taler/merchantpos/payment/ProcessPaymentFragment.kt b/app/src/main/java/net/taler/merchantpos/payment/ProcessPaymentFragment.kt
index a7195ec..89198b8 100644
--- a/app/src/main/java/net/taler/merchantpos/payment/ProcessPaymentFragment.kt
+++ b/app/src/main/java/net/taler/merchantpos/payment/ProcessPaymentFragment.kt
@@ -12,6 +12,7 @@ import com.google.android.material.snackbar.Snackbar
 import com.google.android.material.snackbar.Snackbar.LENGTH_SHORT
 import kotlinx.android.synthetic.main.fragment_process_payment.*
 import net.taler.merchantpos.MainViewModel
+import net.taler.merchantpos.NfcManager.Companion.hasNfc
 import net.taler.merchantpos.QrCodeManager.makeQrCode
 import net.taler.merchantpos.R
 
@@ -28,6 +29,9 @@ class ProcessPaymentFragment : Fragment() {
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        val introRes =
+            if (hasNfc(requireContext())) R.string.payment_intro_nfc else R.string.payment_intro
+        textView2.setText(introRes)
         paymentManager.payment.observe(viewLifecycleOwner, Observer { payment ->
             onPaymentStateChanged(payment)
         })
diff --git a/app/src/main/res/layout/fragment_process_payment.xml b/app/src/main/res/layout/fragment_process_payment.xml
index 53c3bc3..89e88d8 100644
--- a/app/src/main/res/layout/fragment_process_payment.xml
+++ b/app/src/main/res/layout/fragment_process_payment.xml
@@ -25,7 +25,7 @@
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintTop_toTopOf="parent" android:layout_marginTop="32dp" />
         <TextView
-                android:text="Please scan QR Code or use NFC to pay"
+                android:text="@string/payment_intro_nfc"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:id="@+id/textView2"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 98f2da4..1a1c4ca 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -14,9 +14,6 @@
     <string name="menu_share">Share</string>
     <string name="menu_send">Send</string>
 
-    <!-- TODO: Remove or change this placeholder text -->
-    <string name="hello_blank_fragment">Hello blank fragment</string>
-
     <string name="order_total">Total: %1$.2f</string>
     <string name="order_restart">Restart</string>
     <string name="order_undo">Undo</string>
@@ -37,4 +34,7 @@
     <string name="config_save_password">Remember Password</string>
     <string name="config_forget_password">Forget</string>
 
+    <string name="payment_intro_nfc">Please scan QR Code or use NFC to pay</string>
+    <string name="payment_intro">Please scan QR Code to pay</string>
+
 </resources>