conditions around opening file

src/Android/Android.csproj

@@ -875,6 +875,21 @@
   <ItemGroup>
     <AndroidResource Include="Resources\xml\filepaths.xml" />
   </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable\download.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-hdpi\download.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-xhdpi\download.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-xxhdpi\download.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-xxxhdpi\download.png" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
   <Import Project="..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets" Condition="Exists('..\..\packages\Xamarin.Android.Support.Vector.Drawable.23.3.0\build\Xamarin.Android.Support.Vector.Drawable.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">

src/Android/Resources/Resource.Designer.cs

@@ -2436,361 +2436,364 @@ namespace Bit.Android
 			public const int design_snackbar_background = 2130837629;
 			
 			// aapt resource value: 0x7f02007e
-			public const int envelope = 2130837630;
+			public const int download = 2130837630;
 			
 			// aapt resource value: 0x7f02007f
-			public const int eye = 2130837631;
+			public const int envelope = 2130837631;
 			
 			// aapt resource value: 0x7f020080
-			public const int eye_slash = 2130837632;
+			public const int eye = 2130837632;
 			
 			// aapt resource value: 0x7f020081
-			public const int fa_lock = 2130837633;
+			public const int eye_slash = 2130837633;
 			
 			// aapt resource value: 0x7f020082
-			public const int fa_lock_selected = 2130837634;
+			public const int fa_lock = 2130837634;
 			
 			// aapt resource value: 0x7f020083
-			public const int fingerprint = 2130837635;
+			public const int fa_lock_selected = 2130837635;
 			
 			// aapt resource value: 0x7f020084
-			public const int fingerprint_white = 2130837636;
+			public const int fingerprint = 2130837636;
 			
 			// aapt resource value: 0x7f020085
-			public const int folder = 2130837637;
+			public const int fingerprint_white = 2130837637;
 			
 			// aapt resource value: 0x7f020086
-			public const int globe = 2130837638;
+			public const int folder = 2130837638;
 			
 			// aapt resource value: 0x7f020087
-			public const int hockeyapp_btn_background = 2130837639;
+			public const int globe = 2130837639;
 			
 			// aapt resource value: 0x7f020088
-			public const int ic_audiotrack = 2130837640;
+			public const int hockeyapp_btn_background = 2130837640;
 			
 			// aapt resource value: 0x7f020089
-			public const int ic_audiotrack_light = 2130837641;
+			public const int ic_audiotrack = 2130837641;
 			
 			// aapt resource value: 0x7f02008a
-			public const int ic_bluetooth_grey = 2130837642;
+			public const int ic_audiotrack_light = 2130837642;
 			
 			// aapt resource value: 0x7f02008b
-			public const int ic_bluetooth_white = 2130837643;
+			public const int ic_bluetooth_grey = 2130837643;
 			
 			// aapt resource value: 0x7f02008c
-			public const int ic_cast_dark = 2130837644;
+			public const int ic_bluetooth_white = 2130837644;
 			
 			// aapt resource value: 0x7f02008d
-			public const int ic_cast_disabled_light = 2130837645;
+			public const int ic_cast_dark = 2130837645;
 			
 			// aapt resource value: 0x7f02008e
-			public const int ic_cast_grey = 2130837646;
+			public const int ic_cast_disabled_light = 2130837646;
 			
 			// aapt resource value: 0x7f02008f
-			public const int ic_cast_light = 2130837647;
+			public const int ic_cast_grey = 2130837647;
 			
 			// aapt resource value: 0x7f020090
-			public const int ic_cast_off_light = 2130837648;
+			public const int ic_cast_light = 2130837648;
 			
 			// aapt resource value: 0x7f020091
-			public const int ic_cast_on_0_light = 2130837649;
+			public const int ic_cast_off_light = 2130837649;
 			
 			// aapt resource value: 0x7f020092
-			public const int ic_cast_on_1_light = 2130837650;
+			public const int ic_cast_on_0_light = 2130837650;
 			
 			// aapt resource value: 0x7f020093
-			public const int ic_cast_on_2_light = 2130837651;
+			public const int ic_cast_on_1_light = 2130837651;
 			
 			// aapt resource value: 0x7f020094
-			public const int ic_cast_on_light = 2130837652;
+			public const int ic_cast_on_2_light = 2130837652;
 			
 			// aapt resource value: 0x7f020095
-			public const int ic_cast_white = 2130837653;
+			public const int ic_cast_on_light = 2130837653;
 			
 			// aapt resource value: 0x7f020096
-			public const int ic_close_dark = 2130837654;
+			public const int ic_cast_white = 2130837654;
 			
 			// aapt resource value: 0x7f020097
-			public const int ic_close_light = 2130837655;
+			public const int ic_close_dark = 2130837655;
 			
 			// aapt resource value: 0x7f020098
-			public const int ic_collapse = 2130837656;
+			public const int ic_close_light = 2130837656;
 			
 			// aapt resource value: 0x7f020099
-			public const int ic_collapse_00000 = 2130837657;
+			public const int ic_collapse = 2130837657;
 			
 			// aapt resource value: 0x7f02009a
-			public const int ic_collapse_00001 = 2130837658;
+			public const int ic_collapse_00000 = 2130837658;
 			
 			// aapt resource value: 0x7f02009b
-			public const int ic_collapse_00002 = 2130837659;
+			public const int ic_collapse_00001 = 2130837659;
 			
 			// aapt resource value: 0x7f02009c
-			public const int ic_collapse_00003 = 2130837660;
+			public const int ic_collapse_00002 = 2130837660;
 			
 			// aapt resource value: 0x7f02009d
-			public const int ic_collapse_00004 = 2130837661;
+			public const int ic_collapse_00003 = 2130837661;
 			
 			// aapt resource value: 0x7f02009e
-			public const int ic_collapse_00005 = 2130837662;
+			public const int ic_collapse_00004 = 2130837662;
 			
 			// aapt resource value: 0x7f02009f
-			public const int ic_collapse_00006 = 2130837663;
+			public const int ic_collapse_00005 = 2130837663;
 			
 			// aapt resource value: 0x7f0200a0
-			public const int ic_collapse_00007 = 2130837664;
+			public const int ic_collapse_00006 = 2130837664;
 			
 			// aapt resource value: 0x7f0200a1
-			public const int ic_collapse_00008 = 2130837665;
+			public const int ic_collapse_00007 = 2130837665;
 			
 			// aapt resource value: 0x7f0200a2
-			public const int ic_collapse_00009 = 2130837666;
+			public const int ic_collapse_00008 = 2130837666;
 			
 			// aapt resource value: 0x7f0200a3
-			public const int ic_collapse_00010 = 2130837667;
+			public const int ic_collapse_00009 = 2130837667;
 			
 			// aapt resource value: 0x7f0200a4
-			public const int ic_collapse_00011 = 2130837668;
+			public const int ic_collapse_00010 = 2130837668;
 			
 			// aapt resource value: 0x7f0200a5
-			public const int ic_collapse_00012 = 2130837669;
+			public const int ic_collapse_00011 = 2130837669;
 			
 			// aapt resource value: 0x7f0200a6
-			public const int ic_collapse_00013 = 2130837670;
+			public const int ic_collapse_00012 = 2130837670;
 			
 			// aapt resource value: 0x7f0200a7
-			public const int ic_collapse_00014 = 2130837671;
+			public const int ic_collapse_00013 = 2130837671;
 			
 			// aapt resource value: 0x7f0200a8
-			public const int ic_collapse_00015 = 2130837672;
+			public const int ic_collapse_00014 = 2130837672;
 			
 			// aapt resource value: 0x7f0200a9
-			public const int ic_errorstatus = 2130837673;
+			public const int ic_collapse_00015 = 2130837673;
 			
 			// aapt resource value: 0x7f0200aa
-			public const int ic_expand = 2130837674;
+			public const int ic_errorstatus = 2130837674;
 			
 			// aapt resource value: 0x7f0200ab
-			public const int ic_expand_00000 = 2130837675;
+			public const int ic_expand = 2130837675;
 			
 			// aapt resource value: 0x7f0200ac
-			public const int ic_expand_00001 = 2130837676;
+			public const int ic_expand_00000 = 2130837676;
 			
 			// aapt resource value: 0x7f0200ad
-			public const int ic_expand_00002 = 2130837677;
+			public const int ic_expand_00001 = 2130837677;
 			
 			// aapt resource value: 0x7f0200ae
-			public const int ic_expand_00003 = 2130837678;
+			public const int ic_expand_00002 = 2130837678;
 			
 			// aapt resource value: 0x7f0200af
-			public const int ic_expand_00004 = 2130837679;
+			public const int ic_expand_00003 = 2130837679;
 			
 			// aapt resource value: 0x7f0200b0
-			public const int ic_expand_00005 = 2130837680;
+			public const int ic_expand_00004 = 2130837680;
 			
 			// aapt resource value: 0x7f0200b1
-			public const int ic_expand_00006 = 2130837681;
+			public const int ic_expand_00005 = 2130837681;
 			
 			// aapt resource value: 0x7f0200b2
-			public const int ic_expand_00007 = 2130837682;
+			public const int ic_expand_00006 = 2130837682;
 			
 			// aapt resource value: 0x7f0200b3
-			public const int ic_expand_00008 = 2130837683;
+			public const int ic_expand_00007 = 2130837683;
 			
 			// aapt resource value: 0x7f0200b4
-			public const int ic_expand_00009 = 2130837684;
+			public const int ic_expand_00008 = 2130837684;
 			
 			// aapt resource value: 0x7f0200b5
-			public const int ic_expand_00010 = 2130837685;
+			public const int ic_expand_00009 = 2130837685;
 			
 			// aapt resource value: 0x7f0200b6
-			public const int ic_expand_00011 = 2130837686;
+			public const int ic_expand_00010 = 2130837686;
 			
 			// aapt resource value: 0x7f0200b7
-			public const int ic_expand_00012 = 2130837687;
+			public const int ic_expand_00011 = 2130837687;
 			
 			// aapt resource value: 0x7f0200b8
-			public const int ic_expand_00013 = 2130837688;
+			public const int ic_expand_00012 = 2130837688;
 			
 			// aapt resource value: 0x7f0200b9
-			public const int ic_expand_00014 = 2130837689;
+			public const int ic_expand_00013 = 2130837689;
 			
 			// aapt resource value: 0x7f0200ba
-			public const int ic_expand_00015 = 2130837690;
+			public const int ic_expand_00014 = 2130837690;
 			
 			// aapt resource value: 0x7f0200bb
-			public const int ic_media_pause = 2130837691;
+			public const int ic_expand_00015 = 2130837691;
 			
 			// aapt resource value: 0x7f0200bc
-			public const int ic_media_play = 2130837692;
+			public const int ic_media_pause = 2130837692;
 			
 			// aapt resource value: 0x7f0200bd
-			public const int ic_media_route_disabled_mono_dark = 2130837693;
+			public const int ic_media_play = 2130837693;
 			
 			// aapt resource value: 0x7f0200be
-			public const int ic_media_route_off_mono_dark = 2130837694;
+			public const int ic_media_route_disabled_mono_dark = 2130837694;
 			
 			// aapt resource value: 0x7f0200bf
-			public const int ic_media_route_on_0_mono_dark = 2130837695;
+			public const int ic_media_route_off_mono_dark = 2130837695;
 			
 			// aapt resource value: 0x7f0200c0
-			public const int ic_media_route_on_1_mono_dark = 2130837696;
+			public const int ic_media_route_on_0_mono_dark = 2130837696;
 			
 			// aapt resource value: 0x7f0200c1
-			public const int ic_media_route_on_2_mono_dark = 2130837697;
+			public const int ic_media_route_on_1_mono_dark = 2130837697;
 			
 			// aapt resource value: 0x7f0200c2
-			public const int ic_media_route_on_mono_dark = 2130837698;
+			public const int ic_media_route_on_2_mono_dark = 2130837698;
 			
 			// aapt resource value: 0x7f0200c3
-			public const int ic_pause_dark = 2130837699;
+			public const int ic_media_route_on_mono_dark = 2130837699;
 			
 			// aapt resource value: 0x7f0200c4
-			public const int ic_pause_light = 2130837700;
+			public const int ic_pause_dark = 2130837700;
 			
 			// aapt resource value: 0x7f0200c5
-			public const int ic_play_dark = 2130837701;
+			public const int ic_pause_light = 2130837701;
 			
 			// aapt resource value: 0x7f0200c6
-			public const int ic_play_light = 2130837702;
+			public const int ic_play_dark = 2130837702;
 			
 			// aapt resource value: 0x7f0200c7
-			public const int ic_speaker_dark = 2130837703;
+			public const int ic_play_light = 2130837703;
 			
 			// aapt resource value: 0x7f0200c8
-			public const int ic_speaker_group_dark = 2130837704;
+			public const int ic_speaker_dark = 2130837704;
 			
 			// aapt resource value: 0x7f0200c9
-			public const int ic_speaker_group_light = 2130837705;
+			public const int ic_speaker_group_dark = 2130837705;
 			
 			// aapt resource value: 0x7f0200ca
-			public const int ic_speaker_light = 2130837706;
+			public const int ic_speaker_group_light = 2130837706;
 			
 			// aapt resource value: 0x7f0200cb
-			public const int ic_successstatus = 2130837707;
+			public const int ic_speaker_light = 2130837707;
 			
 			// aapt resource value: 0x7f0200cc
-			public const int ic_tv_dark = 2130837708;
+			public const int ic_successstatus = 2130837708;
 			
 			// aapt resource value: 0x7f0200cd
-			public const int ic_tv_light = 2130837709;
+			public const int ic_tv_dark = 2130837709;
 			
 			// aapt resource value: 0x7f0200ce
-			public const int icon = 2130837710;
+			public const int ic_tv_light = 2130837710;
 			
 			// aapt resource value: 0x7f0200cf
-			public const int ion_chevron_right = 2130837711;
+			public const int icon = 2130837711;
 			
 			// aapt resource value: 0x7f0200d0
-			public const int lightbulb = 2130837712;
+			public const int ion_chevron_right = 2130837712;
 			
 			// aapt resource value: 0x7f0200d1
-			public const int list_selector = 2130837713;
+			public const int lightbulb = 2130837713;
 			
 			// aapt resource value: 0x7f0200d2
-			public const int @lock = 2130837714;
+			public const int list_selector = 2130837714;
 			
 			// aapt resource value: 0x7f0200d3
-			public const int logo = 2130837715;
+			public const int @lock = 2130837715;
 			
 			// aapt resource value: 0x7f0200d4
-			public const int more = 2130837716;
+			public const int logo = 2130837716;
 			
 			// aapt resource value: 0x7f0200d5
-			public const int mr_dialog_material_background_dark = 2130837717;
+			public const int more = 2130837717;
 			
 			// aapt resource value: 0x7f0200d6
-			public const int mr_dialog_material_background_light = 2130837718;
+			public const int mr_dialog_material_background_dark = 2130837718;
 			
 			// aapt resource value: 0x7f0200d7
-			public const int mr_ic_audiotrack_light = 2130837719;
+			public const int mr_dialog_material_background_light = 2130837719;
 			
 			// aapt resource value: 0x7f0200d8
-			public const int mr_ic_cast_dark = 2130837720;
+			public const int mr_ic_audiotrack_light = 2130837720;
 			
 			// aapt resource value: 0x7f0200d9
-			public const int mr_ic_cast_light = 2130837721;
+			public const int mr_ic_cast_dark = 2130837721;
 			
 			// aapt resource value: 0x7f0200da
-			public const int mr_ic_close_dark = 2130837722;
+			public const int mr_ic_cast_light = 2130837722;
 			
 			// aapt resource value: 0x7f0200db
-			public const int mr_ic_close_light = 2130837723;
+			public const int mr_ic_close_dark = 2130837723;
 			
 			// aapt resource value: 0x7f0200dc
-			public const int mr_ic_media_route_connecting_mono_dark = 2130837724;
+			public const int mr_ic_close_light = 2130837724;
 			
 			// aapt resource value: 0x7f0200dd
-			public const int mr_ic_media_route_connecting_mono_light = 2130837725;
+			public const int mr_ic_media_route_connecting_mono_dark = 2130837725;
 			
 			// aapt resource value: 0x7f0200de
-			public const int mr_ic_media_route_mono_dark = 2130837726;
+			public const int mr_ic_media_route_connecting_mono_light = 2130837726;
 			
 			// aapt resource value: 0x7f0200df
-			public const int mr_ic_media_route_mono_light = 2130837727;
+			public const int mr_ic_media_route_mono_dark = 2130837727;
 			
 			// aapt resource value: 0x7f0200e0
-			public const int mr_ic_pause_dark = 2130837728;
+			public const int mr_ic_media_route_mono_light = 2130837728;
 			
 			// aapt resource value: 0x7f0200e1
-			public const int mr_ic_pause_light = 2130837729;
+			public const int mr_ic_pause_dark = 2130837729;
 			
 			// aapt resource value: 0x7f0200e2
-			public const int mr_ic_play_dark = 2130837730;
+			public const int mr_ic_pause_light = 2130837730;
 			
 			// aapt resource value: 0x7f0200e3
-			public const int mr_ic_play_light = 2130837731;
+			public const int mr_ic_play_dark = 2130837731;
 			
 			// aapt resource value: 0x7f0200e4
-			public const int notification_sm = 2130837732;
+			public const int mr_ic_play_light = 2130837732;
-			
-			// aapt resource value: 0x7f0200f4
-			public const int notification_template_icon_bg = 2130837748;
 			
 			// aapt resource value: 0x7f0200e5
-			public const int plus = 2130837733;
+			public const int notification_sm = 2130837733;
+			
+			// aapt resource value: 0x7f0200f5
+			public const int notification_template_icon_bg = 2130837749;
 			
 			// aapt resource value: 0x7f0200e6
-			public const int refresh = 2130837734;
+			public const int plus = 2130837734;
 			
 			// aapt resource value: 0x7f0200e7
-			public const int roundedbg = 2130837735;
+			public const int refresh = 2130837735;
 			
 			// aapt resource value: 0x7f0200e8
-			public const int roundedbgdark = 2130837736;
+			public const int roundedbg = 2130837736;
 			
 			// aapt resource value: 0x7f0200e9
-			public const int search = 2130837737;
+			public const int roundedbgdark = 2130837737;
 			
 			// aapt resource value: 0x7f0200ea
-			public const int share = 2130837738;
+			public const int search = 2130837738;
 			
 			// aapt resource value: 0x7f0200eb
-			public const int share_tools = 2130837739;
+			public const int share = 2130837739;
 			
 			// aapt resource value: 0x7f0200ec
-			public const int splash_screen = 2130837740;
+			public const int share_tools = 2130837740;
 			
 			// aapt resource value: 0x7f0200ed
-			public const int star = 2130837741;
+			public const int splash_screen = 2130837741;
 			
 			// aapt resource value: 0x7f0200ee
-			public const int star_selected = 2130837742;
+			public const int star = 2130837742;
 			
 			// aapt resource value: 0x7f0200ef
-			public const int tools = 2130837743;
+			public const int star_selected = 2130837743;
 			
 			// aapt resource value: 0x7f0200f0
-			public const int tools_selected = 2130837744;
+			public const int tools = 2130837744;
 			
 			// aapt resource value: 0x7f0200f1
-			public const int upload = 2130837745;
+			public const int tools_selected = 2130837745;
 			
 			// aapt resource value: 0x7f0200f2
-			public const int user = 2130837746;
+			public const int upload = 2130837746;
 			
 			// aapt resource value: 0x7f0200f3
-			public const int yubikey = 2130837747;
+			public const int user = 2130837747;
+			
+			// aapt resource value: 0x7f0200f4
+			public const int yubikey = 2130837748;
 			
 			static Drawable()
 			{

src/Android/Services/DeviceActionService.cs

@@ -2,11 +2,9 @@
 using Android.Content;
 using Bit.App.Abstractions;
 using Xamarin.Forms;
-using Java.IO;
 using Android.Webkit;
 using Plugin.CurrentActivity;
 using System.IO;
-using System.Diagnostics;
 using Android.Support.V4.Content;
 
 namespace Bit.Android.Services
@@ -21,6 +19,11 @@ namespace Bit.Android.Services
 
         public bool OpenFile(byte[] fileData, string id, string fileName)
         {
+            if(!CanOpenFile(fileName))
+            {
+                return false;
+            }
+
             var extension = MimeTypeMap.GetFileExtensionFromUrl(fileName);
             if(extension == null)
             {
@@ -35,29 +38,47 @@ namespace Bit.Android.Services
 
             var cachePath = CrossCurrentActivity.Current.Activity.CacheDir;
             var filePath = Path.Combine(cachePath.Path, fileName);
-            System.IO.File.WriteAllBytes(filePath, fileData);
+            File.WriteAllBytes(filePath, fileData);
             var file = new Java.IO.File(cachePath, fileName);
+            if(!file.IsFile)
+            {
+                return false;
+            }
+
             try
             {
-                var packageManager = CrossCurrentActivity.Current.Activity.PackageManager;
+                var intent = new Intent(Intent.ActionView);
-                var testIntent = new Intent(Intent.ActionView);
+                var uri = FileProvider.GetUriForFile(CrossCurrentActivity.Current.Activity.ApplicationContext,
-                testIntent.SetType(mimeType);
+                    "com.x8bit.bitwarden.fileprovider", file);
-                var list = packageManager.QueryIntentActivities(testIntent,
+                intent.SetDataAndType(uri, mimeType);
-                    global::Android.Content.PM.PackageInfoFlags.MatchDefaultOnly);
+                intent.SetFlags(ActivityFlags.GrantReadUriPermission);
-                if(list.Count > 0 && file.IsFile)
+                CrossCurrentActivity.Current.Activity.StartActivity(intent);
-                {
+                return true;
-                    var intent = new Intent(Intent.ActionView);
-                    var uri = FileProvider.GetUriForFile(CrossCurrentActivity.Current.Activity.ApplicationContext,
-                        "com.x8bit.bitwarden.fileprovider", file);
-                    intent.SetDataAndType(uri, mimeType);
-                    intent.SetFlags(ActivityFlags.GrantReadUriPermission);
-                    CrossCurrentActivity.Current.Activity.StartActivity(intent);
-                    return true;
-                }
             }
             catch { }
 
             return false;
         }
+
+        public bool CanOpenFile(string fileName)
+        {
+            var extension = MimeTypeMap.GetFileExtensionFromUrl(fileName);
+            if(extension == null)
+            {
+                return false;
+            }
+
+            var mimeType = MimeTypeMap.Singleton.GetMimeTypeFromExtension(extension.ToLower());
+            if(mimeType == null)
+            {
+                return false;
+            }
+
+            var pm = CrossCurrentActivity.Current.Activity.PackageManager;
+            var intent = new Intent(Intent.ActionView);
+            intent.SetType(mimeType);
+            var activities = pm.QueryIntentActivities(intent, global::Android.Content.PM.PackageInfoFlags.MatchDefaultOnly);
+            return (activities?.Count ?? 0) > 0;
+        }
     }
 }

src/App/Abstractions/Services/IDeviceActionService.cs

@@ -4,5 +4,6 @@
     {
         void CopyToClipboard(string text);
         bool OpenFile(byte[] fileData, string id, string fileName);
+        bool CanOpenFile(string fileName);
     }
 }

src/App/Models/Attachment.cs

@@ -13,7 +13,7 @@ namespace Bit.App.Models
             Id = data.Id;
             Url = data.Url;
             FileName = data.FileName != null ? new CipherString(data.FileName) : null;
-            Size = data.Size;
+            SetSize(data.Size);
             SizeName = data.SizeName;
         }
 
@@ -22,19 +22,30 @@ namespace Bit.App.Models
             Id = response.Id;
             Url = response.Url;
             FileName = response.FileName != null ? new CipherString(response.FileName) : null;
-            Size = response.Size;
+            SetSize(response.Size);
             SizeName = response.SizeName;
         }
 
         public string Id { get; set; }
         public string Url { get; set; }
         public CipherString FileName { get; set; }
-        public string Size { get; set; }
+        public long Size { get; set; }
         public string SizeName { get; set; }
 
         public AttachmentData ToAttachmentData(string loginId)
         {
             return new AttachmentData(this, loginId);
         }
+
+        private void SetSize(string sizeString)
+        {
+            long size;
+            if(!long.TryParse(sizeString, out size))
+            {
+                size = 0;
+            }
+
+            Size = size;
+        }
     }
 }

src/App/Models/Data/AttachmentData.cs

@@ -16,7 +16,7 @@ namespace Bit.App.Models.Data
             LoginId = loginId;
             Url = attachment.Url;
             FileName = attachment.FileName?.EncryptedString;
-            Size = attachment.Size;
+            Size = attachment.Size.ToString();
             SizeName = attachment.SizeName;
         }
 

src/App/Models/Page/VaultViewLoginPageModel.cs

@@ -223,7 +223,8 @@ namespace Bit.App.Models.Page
                     {
                         Id = attachment.Id,
                         Name = attachment.FileName?.Decrypt(login.OrganizationId),
-                        Size = attachment.SizeName,
+                        SizeName = attachment.SizeName,
+                        Size = attachment.Size,
                         Url = attachment.Url
                     });
                 }
@@ -239,7 +240,8 @@ namespace Bit.App.Models.Page
         {
             public string Id { get; set; }
             public string Name { get; set; }
-            public string Size { get; set; }
+            public string SizeName { get; set; }
+            public long Size { get; set; }
             public string Url { get; set; }
         }
     }

src/App/Pages/Vault/VaultViewLoginPage.cs

@@ -196,7 +196,7 @@ namespace Bit.App.Pages
                 {
                     AttachmentsSection.Add(new AttachmentViewCell(attachment, async () =>
                     {
-                        await SaveAttachmentAsync(attachment);
+                        await OpenAttachmentAsync(attachment);
                     }));
                 }
                 Table.Root.Add(AttachmentsSection);
@@ -211,8 +211,22 @@ namespace Bit.App.Pages
             EditItem.Dispose();
         }
 
-        private async Task SaveAttachmentAsync(VaultViewLoginPageModel.Attachment attachment)
+        private async Task OpenAttachmentAsync(VaultViewLoginPageModel.Attachment attachment)
         {
+            // 20 MB warning
+            if(attachment.Size >= 20971520 && !(await _userDialogs.ConfirmAsync(
+                    string.Format(AppResources.AttachmentLargeWarning, attachment.SizeName), null,
+                    AppResources.Yes, AppResources.No)))
+            {
+                return;
+            }
+
+            if(!_deviceActionService.CanOpenFile(attachment.Name))
+            {
+                await _userDialogs.AlertAsync(AppResources.UnableToOpenFile, null, AppResources.Ok);
+                return;
+            }
+
             _userDialogs.ShowLoading(AppResources.Downloading, MaskType.Black);
             var data = await _loginService.DownloadAndDecryptAttachmentAsync(null, attachment.Url);
             _userDialogs.HideLoading();
@@ -222,8 +236,7 @@ namespace Bit.App.Pages
                 return;
             }
 
-            var opened = _deviceActionService.OpenFile(data, attachment.Id, attachment.Name);
+            if(!_deviceActionService.OpenFile(data, attachment.Id, attachment.Name))
-            if(!opened)
             {
                 await _userDialogs.AlertAsync(AppResources.UnableToOpenFile, null, AppResources.Ok);
                 return;
@@ -269,8 +282,8 @@ namespace Bit.App.Pages
             {
                 _tapped = tappedAction;
                 Label.Text = attachment.Name;
-                Detail.Text = attachment.Size;
+                Detail.Text = attachment.SizeName;
-                Icon.Source = "user"; // TODO: download icon
+                Icon.Source = "download";
                 BackgroundColor = Color.White;
                 Tapped += AttachmentViewCell_Tapped;
             }

src/App/Resources/AppResources.Designer.cs

@@ -151,6 +151,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to This attachment is {0} in size. Are you sure you want to download it onto your device?.
+        /// </summary>
+        public static string AttachmentLargeWarning {
+            get {
+                return ResourceManager.GetString("AttachmentLargeWarning", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Attachments.
         /// </summary>
@@ -2006,7 +2015,7 @@ namespace Bit.App.Resources {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Unable to open this type of file on your device..
+        ///   Looks up a localized string similar to Your device cannot open this type of tile..
         /// </summary>
         public static string UnableToOpenFile {
             get {

src/App/Resources/AppResources.resx

@@ -912,10 +912,14 @@
     <value>Unable to download file.</value>
   </data>
   <data name="UnableToOpenFile" xml:space="preserve">
-    <value>Unable to open this type of file on your device.</value>
+    <value>Your device cannot open this type of tile.</value>
   </data>
   <data name="Downloading" xml:space="preserve">
     <value>Downloading...</value>
     <comment>Message shown when downloading a file</comment>
   </data>
+  <data name="AttachmentLargeWarning" xml:space="preserve">
+    <value>This attachment is {0} in size. Are you sure you want to download it onto your device?</value>
+    <comment>The placeholder will show the file size of the attachment. Ex "25 MB"</comment>
+  </data>
 </root>

src/App/Utilities/ApiHttpClient.cs

@@ -20,9 +20,9 @@ namespace Bit.App
         private void Init()
         {
             //BaseAddress = new Uri("http://169.254.80.80:4000"); // Desktop from VS Android Emulator
-            //BaseAddress = new Uri("http://192.168.1.6:4000"); // Desktop
+            BaseAddress = new Uri("http://192.168.1.4:4000"); // Desktop
             //BaseAddress = new Uri("https://preview-api.bitwarden.com"); // Preview
-            BaseAddress = new Uri("https://api.bitwarden.com"); // Production
+           // BaseAddress = new Uri("https://api.bitwarden.com"); // Production
             DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
         }
     }

src/App/Utilities/IdentityHttpClient.cs

@@ -20,9 +20,9 @@ namespace Bit.App
         private void Init()
         {
             //BaseAddress = new Uri("http://169.254.80.80:33656"); // Desktop from VS Android Emulator
-            //BaseAddress = new Uri("http://192.168.1.6:33656"); // Desktop
+            BaseAddress = new Uri("http://192.168.1.4:33656"); // Desktop
             //BaseAddress = new Uri("https://identity-api.bitwarden.com"); // Preview
-            BaseAddress = new Uri("https://identity.bitwarden.com"); // Production
+            //BaseAddress = new Uri("https://identity.bitwarden.com"); // Production
             DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
         }
     }

src/iOS/Services/DeviceActionService.cs

@@ -14,7 +14,12 @@ namespace Bit.iOS.Services
 
         public bool OpenFile(byte[] fileData, string id, string fileName)
         {
-            throw new NotImplementedException();
+            return true;
+        }
+
+        public bool CanOpenFile(string fileName)
+        {
+            return true;
         }
     }
 }

src/iOS/iOS.csproj

@@ -725,6 +725,15 @@
   <ItemGroup>
     <BundleResource Include="Resources\yubikey%403x.png" />
   </ItemGroup>
+  <ItemGroup>
+    <BundleResource Include="Resources\download.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <BundleResource Include="Resources\download%403x.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <BundleResource Include="Resources\download%402x.png" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>