add dialog / strings (camera_required & why_camera_required)

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

@@ -218,7 +218,16 @@ class ChannelFragment : ScreenFragment("Channel"), Logging {
                 zxingScan.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE)
                 zxingScan.initiateScan()
             } else {
-                (requireActivity() as MainActivity).requestCameraPermission()
+                MaterialAlertDialogBuilder(requireContext())
+                    .setTitle(R.string.camera_required)
+                    .setMessage(R.string.why_camera_required)
+                    .setNeutralButton(R.string.cancel) { _, _ ->
+                        debug("Camera permission denied")
+                    }
+                    .setPositiveButton(getString(R.string.accept)) { _, _ ->
+                        (requireActivity() as MainActivity).requestCameraPermission()
+                    }
+                    .show()
             }
         }
 

app/src/main/res/values-pt-rBR/strings.xml

@@ -112,4 +112,6 @@
     <string name="cancel_no_radio">Cancelar (sem acesso ao rádio)</string>
     <string name="allow_will_show">Permitir (exibe diálogo)</string>
     <string name="provide_location_to_mesh">Fornecer localização para mesh</string>
+    <string name="camera_required">Permissão da câmera</string>
+    <string name="why_camera_required">Precisamos acessar a câmera para escanear códigos QR. Nenhuma foto ou video são armazenados.</string>
 </resources>

app/src/main/res/values-pt/strings.xml

@@ -112,4 +112,6 @@
     <string name="cancel_no_radio">Cancelar (sem acesso ao rádio)</string>
     <string name="allow_will_show">Permitir (exibe diálogo)</string>
     <string name="provide_location_to_mesh">Fornecer localização para mesh</string>
+    <string name="why_camera_required">Precisamos acessar a câmera para escanear códigos QR. Nenhuma foto ou video são armazenados.</string>
+    <string name="camera_required">Permissão da câmera</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -116,4 +116,6 @@
     <string name="cancel_no_radio">Cancel (no radio access)</string>
     <string name="allow_will_show">Allow (will show dialog)</string>
     <string name="provide_location_to_mesh">Provide location to mesh</string>
+    <string name="camera_required">Camera permission</string>
+    <string name="why_camera_required">We must be granted access to the camera to read QR codes. No pictures or videos will be saved.</string>
 </resources>