SelectStorageLocationActivity handles read-only/temporary cases (first implementation, untested)

src/KeePassLib2Android/KeePassLib2Android.csproj

@@ -20,7 +20,7 @@
     <DebugType>full</DebugType>
     <Optimize>False</Optimize>
     <OutputPath>bin\Debug</OutputPath>
-    <DefineConstants>DEBUG;EXCLUDE_TWOFISH;EXCLUDE_KEYBOARD;EXCLUDE_FILECHOOSER;EXCLUDE_JAVAFILESTORAGE;INCLUDE_KEYTRANSFORM</DefineConstants>
+    <DefineConstants>DEBUG;EXCLUDE_TWOFISH;EXCLUDE_KEYBOARD;INCLUDE_FILECHOOSER;EXCLUDE_JAVAFILESTORAGE;INCLUDE_KEYTRANSFORM</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <ConsolePause>False</ConsolePause>

src/Kp2aBusinessLogic/Io/AndroidContentStorage.cs

@@ -143,6 +143,18 @@ namespace keepass2android.Io
 		{
 			throw new NotImplementedException();
 		}
+
+		public bool IsPermanentLocation(IOConnectionInfo ioc)
+		{
+			//on pre-Kitkat devices, content:// is always temporary:
+			return false;
+		}
+
+		public bool IsReadOnly(IOConnectionInfo ioc)
+		{
+			//on pre-Kitkat devices, we can't write content:// files
+			return true;
+		}
 	}
 
 	class AndroidContentWriteTransaction : IWriteTransaction

src/Kp2aBusinessLogic/Io/BuiltInFileStorage.cs

@@ -4,6 +4,7 @@ using System.Globalization;
 using System.IO;
 using System.Net;
 using System.Net.Security;
+using System.Security;
 using Android.Content;
 using Android.OS;
 using Java.Security.Cert;
@@ -290,5 +291,67 @@ namespace keepass2android.Io
 			res.Path += filename;
 			return res;
 		}
+
+		public bool IsPermanentLocation(IOConnectionInfo ioc)
+		{
+			return true;
+		}
+
+		public bool IsReadOnlyBecauseKitkatRestrictions(IOConnectionInfo ioc)
+		{
+			if (IsLocalFileFlaggedReadOnly(ioc))
+				return false; //it's not read-only because of the restrictions introduced in kitkat
+			try
+			{
+				//test if we can open 
+				//http://www.doubleencore.com/2014/03/android-external-storage/#comment-1294469517
+				using (var writer = new Java.IO.FileOutputStream(ioc.Path, true))
+				{
+					writer.Close();
+					return false; //we can write
+				}
+			}
+			catch (Java.IO.IOException)
+			{
+				//seems like we can't write to that location even though it's not read-only
+				return true;
+			}
+			
+		}
+
+		public bool IsReadOnly(IOConnectionInfo ioc)
+		{
+			if (ioc.IsLocalFile())
+			{
+				if (IsLocalFileFlaggedReadOnly(ioc))
+					return true;
+				if (IsReadOnlyBecauseKitkatRestrictions(ioc))
+					return true;
+
+				return false;
+			}
+			//for remote files assume they can be written: (think positive! :-) )
+			return false;
+		}
+
+		private bool IsLocalFileFlaggedReadOnly(IOConnectionInfo ioc)
+		{
+			try
+			{
+				return new FileInfo(ioc.Path).IsReadOnly;
+			}
+			catch (SecurityException)
+			{
+				return true;
+			}
+			catch (UnauthorizedAccessException)
+			{
+				return true;
+			}
+			catch (Exception)
+			{
+				return false;
+			}
+		}
 	}
 }

src/Kp2aBusinessLogic/Io/CachingFileStorage.cs

@@ -542,6 +542,19 @@ namespace keepass2android.Io
 			
 		}
 
+		public bool IsPermanentLocation(IOConnectionInfo ioc)
+		{
+			//even though the cache would be permanent, it's not a good idea to cache a temporary file, so return false in that case:
+			return _cachedStorage.IsPermanentLocation(ioc);
+		}
+
+		public bool IsReadOnly(IOConnectionInfo ioc)
+		{
+			//even though the cache can always be written, the changes made in the cache could not be transferred to the cached file
+			//so we better treat the cache as read-only as well.
+			return _cachedStorage.IsReadOnly(ioc);
+		}
+
 		private void StoreFilePath(IOConnectionInfo folderPath, string filename, IOConnectionInfo res)
 		{
 			File.WriteAllText(CachedFilePath(GetPseudoIoc(folderPath, filename)) + ".filepath", res.Path);

src/Kp2aBusinessLogic/Io/IFileStorage.cs

@@ -149,6 +149,17 @@ namespace keepass2android.Io
 		/// </summary>
 		/// The method may throw FileNotFoundException or not in case the file doesn't exist.
 		IOConnectionInfo GetFilePath(IOConnectionInfo folderPath, string filename);
+
+		/// <summary>
+		/// returns true if it can be expected that this location will be available permanently (in contrast to a cache copy or temporary URI permissions in Android)
+		/// </summary>
+		/// Does not require to exist forever!
+		bool IsPermanentLocation(IOConnectionInfo ioc);
+
+		/// <summary>
+		/// Should return true if the file cannot be written.
+		/// </summary>
+		bool IsReadOnly(IOConnectionInfo ioc);
 	}
 
 	public interface IWriteTransaction: IDisposable

src/Kp2aBusinessLogic/Kp2aBusinessLogic.csproj

@@ -20,7 +20,7 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>TRACE;DEBUG;EXCLUDE_TWOFISH;EXCLUDE_KEYBOARD;EXCLUDE_FILECHOOSER;EXCLUDE_JAVAFILESTORAGE;INCLUDE_KEYTRANSFORM</DefineConstants>
+    <DefineConstants>TRACE;DEBUG;EXCLUDE_TWOFISH;EXCLUDE_KEYBOARD;INCLUDE_FILECHOOSER;EXCLUDE_JAVAFILESTORAGE;INCLUDE_KEYTRANSFORM</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>

src/Kp2aUnitTests/Kp2aUnitTests.csproj

@@ -67,6 +67,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="TestAndroidContentFileStorage.cs" />
     <Compile Include="TestIntentsAndBundles.cs" />
     <Compile Include="ProgressDialogStub.cs" />
     <Compile Include="TestBase.cs" />

src/Kp2aUnitTests/MainActivity.cs

@@ -20,7 +20,10 @@ namespace Kp2aUnitTests
             // Run all tests from this assembly
             //runner.AddTests(Assembly.GetExecutingAssembly());
 			//runner.AddTests(typeof(TestLoadDb).GetMethod("TestLoadKdb1WithKeyfileByDirectCall"));
-			runner.AddTests(typeof(TestLoadDb).GetMethod("TestLoadKdb1WithKeyfileOnly"));
+			//runner.AddTests(typeof(TestLoadDb).GetMethod("TestLoadKdb1WithKeyfileOnly"));
+
+
+			runner.AddTests(new List<Type> { typeof(TestBuiltInFileStorage) });
 			//runner.AddTests(new List<Type> { typeof(TestSynchronizeCachedDatabase)});
 			//runner.AddTests(typeof(TestLoadDb).GetMethod("LoadErrorWithCertificateTrustFailure"));
 			//runner.AddTests(typeof(TestLoadDb).GetMethod("LoadWithAcceptedCertificateTrustFailure"));

src/Kp2aUnitTests/TestFileStorage.cs

@@ -183,5 +183,15 @@ namespace Kp2aUnitTests
 		{
 			throw new NotImplementedException();
 		}
+
+		public bool IsPermanentLocation(IOConnectionInfo ioc)
+		{
+			return true;	
+		}
+
+		public bool IsReadOnly(IOConnectionInfo ioc)
+		{
+			return false;
+		}
 	}
 }

src/java/KP2AKdbLibrary/src/com/keepassdroid/database/load/ImporterV3.java

@@ -167,7 +167,7 @@ public class ImporterV3  {
 		hdr.loadFromFile(filebuf, 0 );
 
 		if( (hdr.signature1 != PwDbHeader.PWM_DBSIG_1) || (hdr.signature2 != PwDbHeaderV3.DBSIG_2) ) {
-			throw new InvalidDBSignatureException();
+			throw new InvalidDBSignatureException("Invalid database signature!");
 		}
 
 		if( !hdr.matchesVersion() ) {
@@ -230,7 +230,7 @@ public class ImporterV3  {
 		} catch (IllegalBlockSizeException e1) {
 			throw new IOException("Invalid block size");
 		} catch (BadPaddingException e1) {
-			throw new InvalidPasswordException();
+			throw new InvalidPasswordException("Invalid key!");
 		}
 
 		// Copy decrypted data for testing
@@ -251,7 +251,7 @@ public class ImporterV3  {
 		if( ! Arrays.equals(hash, hdr.contentsHash) ) {
 
 			Log.w("KeePassDroid","Database file did not decrypt correctly. (checksum code is broken)");
-			throw new InvalidPasswordException();
+			throw new InvalidPasswordException("Invalid key!");
 		}
 
 		// Import all groups

src/keepass2android/Resources/Resource.designer.cs

@@ -3296,6 +3296,9 @@ namespace keepass2android
 			// aapt resource value: 0x7f070204
 			public const int BinaryDirectory_title = 2131165700;
 			
+			// aapt resource value: 0x7f0702c5
+			public const int CancelReadOnly = 2131165893;
+			
 			// aapt resource value: 0x7f07026a
 			public const int CannotMoveGroupHere = 2131165802;
 			
@@ -3305,56 +3308,56 @@ namespace keepass2android
 			// aapt resource value: 0x7f0702bb
 			public const int CertificateWarning = 2131165883;
 			
+			// aapt resource value: 0x7f0702d8
+			public const int ChangeLog = 2131165912;
+			
+			// aapt resource value: 0x7f0702d7
+			public const int ChangeLog_0_7 = 2131165911;
+			
+			// aapt resource value: 0x7f0702d5
+			public const int ChangeLog_0_8 = 2131165909;
+			
+			// aapt resource value: 0x7f0702d4
+			public const int ChangeLog_0_8_1 = 2131165908;
+			
+			// aapt resource value: 0x7f0702d3
+			public const int ChangeLog_0_8_2 = 2131165907;
+			
+			// aapt resource value: 0x7f0702d2
+			public const int ChangeLog_0_8_3 = 2131165906;
+			
+			// aapt resource value: 0x7f0702d1
+			public const int ChangeLog_0_8_4 = 2131165905;
+			
 			// aapt resource value: 0x7f0702d0
-			public const int ChangeLog = 2131165904;
+			public const int ChangeLog_0_8_5 = 2131165904;
 			
 			// aapt resource value: 0x7f0702cf
-			public const int ChangeLog_0_7 = 2131165903;
-			
-			// aapt resource value: 0x7f0702cd
-			public const int ChangeLog_0_8 = 2131165901;
-			
-			// aapt resource value: 0x7f0702cc
-			public const int ChangeLog_0_8_1 = 2131165900;
-			
-			// aapt resource value: 0x7f0702cb
-			public const int ChangeLog_0_8_2 = 2131165899;
-			
-			// aapt resource value: 0x7f0702ca
-			public const int ChangeLog_0_8_3 = 2131165898;
-			
-			// aapt resource value: 0x7f0702c9
-			public const int ChangeLog_0_8_4 = 2131165897;
-			
-			// aapt resource value: 0x7f0702c8
-			public const int ChangeLog_0_8_5 = 2131165896;
-			
-			// aapt resource value: 0x7f0702c7
-			public const int ChangeLog_0_8_6 = 2131165895;
-			
-			// aapt resource value: 0x7f0702c6
-			public const int ChangeLog_0_9 = 2131165894;
-			
-			// aapt resource value: 0x7f0702c5
-			public const int ChangeLog_0_9_1 = 2131165893;
-			
-			// aapt resource value: 0x7f0702c4
-			public const int ChangeLog_0_9_2 = 2131165892;
-			
-			// aapt resource value: 0x7f0702c3
-			public const int ChangeLog_0_9_3 = 2131165891;
-			
-			// aapt resource value: 0x7f0702c2
-			public const int ChangeLog_0_9_3_r5 = 2131165890;
-			
-			// aapt resource value: 0x7f0702c1
-			public const int ChangeLog_0_9_4 = 2131165889;
+			public const int ChangeLog_0_8_6 = 2131165903;
 			
 			// aapt resource value: 0x7f0702ce
-			public const int ChangeLog_keptDonate = 2131165902;
+			public const int ChangeLog_0_9 = 2131165902;
 			
-			// aapt resource value: 0x7f0702bf
-			public const int ChangeLog_title = 2131165887;
+			// aapt resource value: 0x7f0702cd
+			public const int ChangeLog_0_9_1 = 2131165901;
+			
+			// aapt resource value: 0x7f0702cc
+			public const int ChangeLog_0_9_2 = 2131165900;
+			
+			// aapt resource value: 0x7f0702cb
+			public const int ChangeLog_0_9_3 = 2131165899;
+			
+			// aapt resource value: 0x7f0702ca
+			public const int ChangeLog_0_9_3_r5 = 2131165898;
+			
+			// aapt resource value: 0x7f0702c9
+			public const int ChangeLog_0_9_4 = 2131165897;
+			
+			// aapt resource value: 0x7f0702d6
+			public const int ChangeLog_keptDonate = 2131165910;
+			
+			// aapt resource value: 0x7f0702c7
+			public const int ChangeLog_title = 2131165895;
 			
 			// aapt resource value: 0x7f070112
 			public const int CheckForFileChangesOnSave_key = 2131165458;
@@ -3380,9 +3383,21 @@ namespace keepass2android
 			// aapt resource value: 0x7f070226
 			public const int ClearOfflineCache_title = 2131165734;
 			
+			// aapt resource value: 0x7f0702c4
+			public const int ClickOkToSelectLocation = 2131165892;
+			
+			// aapt resource value: 0x7f0702c2
+			public const int CopyFileRequired = 2131165890;
+			
+			// aapt resource value: 0x7f0702c3
+			public const int CopyFileRequiredForEditing = 2131165891;
+			
 			// aapt resource value: 0x7f070117
 			public const int CopyToClipboardNotification_key = 2131165463;
 			
+			// aapt resource value: 0x7f0702c6
+			public const int CopyingFile = 2131165894;
+			
 			// aapt resource value: 0x7f07025d
 			public const int CouldNotLoadFromRemote = 2131165789;
 			
@@ -3437,6 +3452,15 @@ namespace keepass2android
 			// aapt resource value: 0x7f070104
 			public const int FileHandling_prefs_key = 2131165444;
 			
+			// aapt resource value: 0x7f0702c0
+			public const int FileIsReadOnly = 2131165888;
+			
+			// aapt resource value: 0x7f0702c1
+			public const int FileIsReadOnlyOnKitkat = 2131165889;
+			
+			// aapt resource value: 0x7f0702bf
+			public const int FileIsTemporarilyAvailable = 2131165887;
+			
 			// aapt resource value: 0x7f07017a
 			public const int FileNotFound = 2131165562;
 			
@@ -3524,8 +3548,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f070234
 			public const int PreloadDatabaseEnabled_title = 2131165748;
 			
-			// aapt resource value: 0x7f0702c0
-			public const int PreviewWarning = 2131165888;
+			// aapt resource value: 0x7f0702c8
+			public const int PreviewWarning = 2131165896;
 			
 			// aapt resource value: 0x7f070105
 			public const int QuickUnlockDefaultEnabled_key = 2131165445;
@@ -4169,11 +4193,11 @@ namespace keepass2android
 			// aapt resource value: 0x7f070145
 			public const int brackets = 2131165509;
 			
-			// aapt resource value: 0x7f0702d3
-			public const int browser_intall_text = 2131165907;
+			// aapt resource value: 0x7f0702db
+			public const int browser_intall_text = 2131165915;
 			
-			// aapt resource value: 0x7f0702d4
-			public const int building_search_idx = 2131165908;
+			// aapt resource value: 0x7f0702dc
+			public const int building_search_idx = 2131165916;
 			
 			// aapt resource value: 0x7f070285
 			public const int button_change_location = 2131165829;
@@ -4259,14 +4283,14 @@ namespace keepass2android
 			// aapt resource value: 0x7f0700ec
 			public const int db_key = 2131165420;
 			
-			// aapt resource value: 0x7f0702d5
-			public const int decrypting_db = 2131165909;
+			// aapt resource value: 0x7f0702dd
+			public const int decrypting_db = 2131165917;
 			
-			// aapt resource value: 0x7f0702d6
-			public const int decrypting_entry = 2131165910;
+			// aapt resource value: 0x7f0702de
+			public const int decrypting_entry = 2131165918;
 			
-			// aapt resource value: 0x7f0702d7
-			public const int default_checkbox = 2131165911;
+			// aapt resource value: 0x7f0702df
+			public const int default_checkbox = 2131165919;
 			
 			// aapt resource value: 0x7f0700de
 			public const int default_file_path = 2131165406;
@@ -4289,8 +4313,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f0700f3
 			public const int design_key = 2131165427;
 			
-			// aapt resource value: 0x7f0702d1
-			public const int design_title = 2131165905;
+			// aapt resource value: 0x7f0702d9
+			public const int design_title = 2131165913;
 			
 			// aapt resource value: 0x7f070152
 			public const int digits = 2131165522;
@@ -4352,8 +4376,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f070156
 			public const int entry_accessed = 2131165526;
 			
-			// aapt resource value: 0x7f0702d8
-			public const int entry_and_or = 2131165912;
+			// aapt resource value: 0x7f0702e0
+			public const int entry_and_or = 2131165920;
 			
 			// aapt resource value: 0x7f070168
 			public const int entry_binaries = 2131165544;
@@ -4409,8 +4433,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f07028d
 			public const int error_adding_keyfile = 2131165837;
 			
-			// aapt resource value: 0x7f0702d9
-			public const int error_arc4 = 2131165913;
+			// aapt resource value: 0x7f0702e1
+			public const int error_arc4 = 2131165921;
 			
 			// aapt resource value: 0x7f070169
 			public const int error_can_not_handle_uri = 2131165545;
@@ -4424,8 +4448,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f07016c
 			public const int error_database_exists = 2131165548;
 			
-			// aapt resource value: 0x7f0702d2
-			public const int error_database_settings = 2131165906;
+			// aapt resource value: 0x7f0702da
+			public const int error_database_settings = 2131165914;
 			
 			// aapt resource value: 0x7f07016d
 			public const int error_database_settinoverrgs = 2131165549;
@@ -4454,8 +4478,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f070174
 			public const int error_nopass = 2131165556;
 			
-			// aapt resource value: 0x7f0702da
-			public const int error_out_of_memory = 2131165914;
+			// aapt resource value: 0x7f0702e2
+			public const int error_out_of_memory = 2131165922;
 			
 			// aapt resource value: 0x7f070175
 			public const int error_pass_gen_type = 2131165557;
@@ -4466,8 +4490,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f070177
 			public const int error_rounds_not_number = 2131165559;
 			
-			// aapt resource value: 0x7f0702db
-			public const int error_rounds_too_large = 2131165915;
+			// aapt resource value: 0x7f0702e3
+			public const int error_rounds_too_large = 2131165923;
 			
 			// aapt resource value: 0x7f07020f
 			public const int error_string_key = 2131165711;
@@ -4655,11 +4679,11 @@ namespace keepass2android
 			// aapt resource value: 0x7f0701d6
 			public const int insert_element_here = 2131165654;
 			
-			// aapt resource value: 0x7f0702dc
-			public const int install_from_market = 2131165916;
+			// aapt resource value: 0x7f0702e4
+			public const int install_from_market = 2131165924;
 			
-			// aapt resource value: 0x7f0702dd
-			public const int install_from_website = 2131165917;
+			// aapt resource value: 0x7f0702e5
+			public const int install_from_website = 2131165925;
 			
 			// aapt resource value: 0x7f07018c
 			public const int invalid_algorithm = 2131165580;
@@ -4874,8 +4898,8 @@ namespace keepass2android
 			// aapt resource value: 0x7f0701a6
 			public const int menu_hide_password = 2131165606;
 			
-			// aapt resource value: 0x7f0702de
-			public const int menu_homepage = 2131165918;
+			// aapt resource value: 0x7f0702e6
+			public const int menu_homepage = 2131165926;
 			
 			// aapt resource value: 0x7f0701a7
 			public const int menu_lock = 2131165607;

src/keepass2android/Resources/values/strings.xml

@@ -475,6 +475,17 @@
 
 	<string name="killed_by_os">Sorry! Keepass2Android was killed by the Android OS! For security reasons, Keepass2Android did not persist your selected credentials on disk, so you need to re-open your database. Note: This should happen only very rarely. If it does, please drop me a message at crocoapps@gmail.com.</string>
 	
+	
+	<string name="FileIsTemporarilyAvailable">The file is only temporarily available for Keepass2Android.</string>
+	<string name="FileIsReadOnly">The file you selected is read-only.</string>
+	<string name="FileIsReadOnlyOnKitkat">The file you selected is read-only for Keepass2Android due to restrictions on Android 4.4+.</string>
+	<string name="CopyFileRequired">To use it, you must copy it to another location.</string>
+	<string name="CopyFileRequiredForEditing">To edit it, you must copy the file to another location.</string>
+	<string name="ClickOkToSelectLocation">Click OK to select a location where the file should be copied.</string>
+	<string name="CancelReadOnly">Cancel, open read-only.</string>
+	
+	<string name="CopyingFile">Copying file...</string>
+	
 	<string name="ChangeLog_title">Change log</string>
 
 	<string name="PreviewWarning">Please note! This is a preview release and might come with some flaws! If you experience *anything* unexpected, please let me know (on Codeplex or by email).</string>

src/keepass2android/SelectStorageLocationActivity.cs

@@ -9,6 +9,7 @@ using Android.OS;
 using Android.Runtime;
 using Android.Views;
 using Android.Widget;
+using Group.Pals.Android.Lib.UI.Filechooser.Utils.UI;
 using KeePassLib.Serialization;
 using keepass2android.Io;
 using Environment = Android.OS.Environment;
@@ -16,11 +17,24 @@ using Environment = Android.OS.Environment;
 namespace keepass2android
 {
 	[Activity(Label = "")]
-	public class SelectStorageLocationActivity : Activity
+	public class SelectStorageLocationActivity : Activity, IDialogInterfaceOnDismissListener
 	{
 		private ActivityDesign _design;
 		private bool _isRecreated;
-		private const int RequestCodeFileStorageSelection = 983713;
+		private IOConnectionInfo _selectedIoc;
+		private const string BundleKeySelectedIoc = "BundleKeySelectedIoc";
+		private const int RequestCodeFileStorageSelectionForPrimarySelect = 983713;
+		private const int RequestCodeFileStorageSelectionForCopyToWritableLocation = 983714;
+		private const int RequestCodeFileFileBrowseForWritableLocation = 983715;
+
+		public enum WritableRequirements
+		{
+			ReadOnly = 0,
+			WriteDesired = 1,
+			WriteDemanded = 2
+		}
+
+		public const string ExtraKeyWritableRequirements = "EXTRA_KEY_WRITABLE_REQUIREMENTS";
 
 		public SelectStorageLocationActivity()
 		{
@@ -36,8 +50,8 @@ namespace keepass2android
 
 			Kp2aLog.Log("SelectStorageLocationActivity.OnCreate");
 
-			IsForSave = Intent.GetBooleanExtra(FileStorageSetupDefs.ExtraIsForSave, false);
-			if (IsForSave)
+			
+			if (IsStorageSelectionForSave)
 			{
 				throw new Exception("save is not yet implemented. In StartSelectFile, no handler for onCreate is passed.");
 			}
@@ -49,6 +63,9 @@ namespace keepass2android
 			else
 			{
 				State = (Bundle)bundle.Clone();
+				var selectedIocString = bundle.GetString(BundleKeySelectedIoc, null);
+				if (selectedIocString != null)
+					_selectedIoc = IOConnectionInfo.UnserializeFromString(selectedIocString);
 				_isRecreated = true;
 			}
 
@@ -57,7 +74,7 @@ namespace keepass2android
 				Intent intent = new Intent(this, typeof(FileStorageSelectionActivity));
 				intent.PutExtra(FileStorageSelectionActivity.AllowThirdPartyAppGet, allowThirdPartyGet);
 				intent.PutExtra(FileStorageSelectionActivity.AllowThirdPartyAppSend, allowThirdPartySend);
-				StartActivityForResult(intent, RequestCodeFileStorageSelection);	
+				StartActivityForResult(intent, RequestCodeFileStorageSelectionForPrimarySelect);	
 			}
 				
 
@@ -65,7 +82,10 @@ namespace keepass2android
 
 		protected Bundle State { get; set; }
 
-		protected bool IsForSave { get; set; }
+		protected bool IsStorageSelectionForSave 
+		{ 
+			get { return Intent.GetBooleanExtra(FileStorageSetupDefs.ExtraIsForSave, false); }
+		}
 
 
 		protected override void OnSaveInstanceState(Bundle outState)
@@ -73,6 +93,8 @@ namespace keepass2android
 			base.OnSaveInstanceState(outState);
 
 			outState.PutAll(State);
+			if (_selectedIoc != null)
+				outState.PutString(BundleKeySelectedIoc, IOConnectionInfo.SerializeToString(_selectedIoc));
 		}
 
 		protected override void OnResume()
@@ -84,8 +106,14 @@ namespace keepass2android
 		protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
 		{
 			base.OnActivityResult(requestCode, resultCode, data);
-			if (requestCode == RequestCodeFileStorageSelection)
+			if ((requestCode == RequestCodeFileStorageSelectionForPrimarySelect) || ((requestCode == RequestCodeFileStorageSelectionForCopyToWritableLocation)))
 			{
+				int browseRequestCode = Intents.RequestCodeFileBrowseForOpen;
+				if (requestCode == RequestCodeFileStorageSelectionForCopyToWritableLocation)
+				{
+					browseRequestCode = RequestCodeFileFileBrowseForWritableLocation;
+				}
+
 				if (resultCode == KeePass.ExitFileStorageSelectionOk)
 				{
 
@@ -97,45 +125,55 @@ namespace keepass2android
 					}
 					else
 					{
+						bool isForSave = (requestCode == RequestCodeFileStorageSelectionForPrimarySelect) ?
+							IsStorageSelectionForSave : true;
+						
 						App.Kp2a.GetFileStorage(protocolId).StartSelectFile(new FileStorageSetupInitiatorActivity(this,
 							OnActivityResult,
 							defaultPath =>
-							{
+								{
 								if (defaultPath.StartsWith("sftp://"))
-									Util.ShowSftpDialog(this, OnReceivedSftpData, ReturnCancel);
+									Util.ShowSftpDialog(this, filename => OnReceivedSftpData(filename, browseRequestCode, isForSave), ReturnCancel);
 								else
-									Util.ShowFilenameDialog(this, OnOpenButton, null, ReturnCancel, false, defaultPath, GetString(Resource.String.enter_filename_details_url),
-													Intents.RequestCodeFileBrowseForOpen);
+									//todo oncreate nur wenn for save?
+									Util.ShowFilenameDialog(this, filename => OnOpenButton(filename, browseRequestCode),
+												filename => OnOpenButton(filename, browseRequestCode), 
+												ReturnCancel, false, defaultPath, GetString(Resource.String.enter_filename_details_url),
+													browseRequestCode);
 							}
-							), false, 0, protocolId);
+							), isForSave, browseRequestCode, protocolId);
 					}
 
 
 				}
 				else
 				{
-					if (resultCode == (Result)FileStorageResults.FileChooserPrepared)
-					{
-						IOConnectionInfo ioc = new IOConnectionInfo();
-						PasswordActivity.SetIoConnectionFromIntent(ioc, data);
-#if !EXCLUDE_FILECHOOSER
-				StartFileChooser(ioc.Path);
-#else
-						ReturnIoc(new IOConnectionInfo { Path = "/mnt/sdcard/keepass/yubi.kdbx" });
-#endif
-						return;
-					}
-					if ((resultCode == Result.Canceled) && (data != null) && (data.HasExtra("EXTRA_ERROR_MESSAGE")))
-					{
-						Toast.MakeText(this, data.GetStringExtra("EXTRA_ERROR_MESSAGE"), ToastLength.Long).Show();
-					}
 					ReturnCancel();
 				}
 	
 			}
 
-			if (requestCode == Intents.RequestCodeFileBrowseForOpen)
+			if ((requestCode == Intents.RequestCodeFileBrowseForOpen) || (requestCode == RequestCodeFileFileBrowseForWritableLocation))
 			{
+				if (resultCode == (Result)FileStorageResults.FileChooserPrepared)
+				{
+					IOConnectionInfo ioc = new IOConnectionInfo();
+					PasswordActivity.SetIoConnectionFromIntent(ioc, data);
+#if !EXCLUDE_FILECHOOSER
+					bool isForSave = (requestCode == RequestCodeFileFileBrowseForWritableLocation) ?
+						true : IsStorageSelectionForSave ;
+						
+					StartFileChooser(ioc.Path, requestCode, isForSave);
+#else
+						IocSelected(new IOConnectionInfo { Path = "/mnt/sdcard/keepass/yubi.kdbx" }, requestCode);
+#endif
+					return;
+				}
+				if ((resultCode == Result.Canceled) && (data != null) && (data.HasExtra("EXTRA_ERROR_MESSAGE")))
+				{
+					Toast.MakeText(this, data.GetStringExtra("EXTRA_ERROR_MESSAGE"), ToastLength.Long).Show();
+				}
+
 				if (resultCode == Result.Ok)
 				{
 					string filename = Util.IntentToFilename(data, this);
@@ -152,13 +190,13 @@ namespace keepass2android
 								Path = filename
 							};
 
-						ReturnIoc(ioc);
+						IocSelected(ioc, requestCode);
 					}
 					else
 					{
 						if (data.Data.Scheme == "content")
 						{
-							ReturnIoc(IOConnectionInfo.FromPath(data.DataString));
+							IocSelected(IOConnectionInfo.FromPath(data.DataString), requestCode);
 	
 						}
 						else
@@ -189,28 +227,154 @@ namespace keepass2android
 			Finish();
 		}
 
-		private void ReturnIoc(IOConnectionInfo ioc)
+		private void IocSelected(IOConnectionInfo ioc, int requestCode)
+		{
+			if (requestCode == RequestCodeFileFileBrowseForWritableLocation)
+			{
+				IocForCopySelected(ioc);
+			}
+			else if (requestCode == Intents.RequestCodeFileBrowseForOpen)
+			{
+				PrimaryIocSelected(ioc);
+			}
+			else
+			{
+#if DEBUG
+				throw new Exception("invalid request code!");
+#endif
+			}
+
+			
+
+		}
+
+		private void IocForCopySelected(IOConnectionInfo targetIoc)
+		{
+			new keepass2android.Utils.SimpleLoadingDialog(this, GetString(Resource.String.CopyingFile), false,
+			() =>
+				{
+					IOConnectionInfo sourceIoc = _selectedIoc;
+
+					try
+					{
+						CopyFile(targetIoc, sourceIoc);
+					}
+					catch (Exception e)
+					{
+						return () =>
+							{
+								Toast.MakeText(this, App.Kp2a.GetResourceString(UiStringKey.ErrorOcurred) + " " + e.Message, ToastLength.Long).Show();
+								ReturnCancel();
+							};
+					}
+					
+
+					return () => {ReturnOk(targetIoc); };
+				}
+			).Execute(new Object[] {});
+		}
+
+		private static void CopyFile(IOConnectionInfo targetIoc, IOConnectionInfo sourceIoc)
+		{
+			IFileStorage sourceStorage = App.Kp2a.GetFileStorage(sourceIoc);
+			IFileStorage targetStorage = App.Kp2a.GetFileStorage(targetIoc);
+
+			using (
+				var writeTransaction = targetStorage.OpenWriteTransaction(targetIoc,
+				                                                          App.Kp2a.GetBooleanPreference(
+					                                                          PreferenceKey.UseFileTransactions)))
+			{
+				using (var writeStream = writeTransaction.OpenFile())
+				{
+					sourceStorage.OpenFileForRead(sourceIoc).CopyTo(writeStream);
+				}
+				writeTransaction.CommitWrite();
+			}
+		}
+
+		private void PrimaryIocSelected(IOConnectionInfo ioc)
+		{
+			if (!App.Kp2a.GetFileStorage(ioc).IsPermanentLocation(ioc))
+			{
+				new AlertDialog.Builder(this)
+					.SetPositiveButton(Android.Resource.String.Ok, (sender, args) => { MoveToWritableLocation(ioc); })
+					.SetMessage(Resources.GetString(Resource.String.FileIsTemporarilyAvailable) + " "
+							+ Resources.GetString(Resource.String.CopyFileRequired) + " "
+							+ Resources.GetString(Resource.String.ClickOkToSelectLocation))
+					.SetCancelable(false)
+					.SetNegativeButton(Android.Resource.String.Cancel, (sender, args) => { ReturnCancel(); })
+					//.SetOnDismissListener(this)
+					.Create()
+					.Show();
+				return;
+			}
+			var filestorage = App.Kp2a.GetFileStorage(ioc);
+
+			if ((RequestedWritableRequirements != WritableRequirements.ReadOnly) && (filestorage.IsReadOnly(ioc)))
+			{
+				string readOnlyExplanation = Resources.GetString(Resource.String.FileIsReadOnly);
+				BuiltInFileStorage builtInFileStorage = filestorage as BuiltInFileStorage;
+				if (builtInFileStorage != null)
+				{
+					if (builtInFileStorage.IsReadOnlyBecauseKitkatRestrictions(ioc))
+						readOnlyExplanation = Resources.GetString(Resource.String.FileIsReadOnlyOnKitkat);
+				}
+				new AlertDialog.Builder(this)
+						.SetPositiveButton(Android.Resource.String.Ok, (sender, args) => { MoveToWritableLocation(ioc); })
+						.SetCancelable(false)
+						.SetNegativeButton(Android.Resource.String.Cancel, (sender, args) => { ReturnCancel(); })
+					//.SetOnDismissListener(this)
+						.SetMessage(readOnlyExplanation + " "
+							+ (RequestedWritableRequirements == WritableRequirements.WriteDemanded ?
+								Resources.GetString(Resource.String.CopyFileRequired)
+								: Resources.GetString(Resource.String.CopyFileRequiredForEditing))
+							+ " "
+							+ Resources.GetString(Resource.String.ClickOkToSelectLocation))
+						.Create()
+						.Show();
+				return;
+			}
+			ReturnOk(ioc);
+		}
+
+		private void ReturnOk(IOConnectionInfo ioc)
 		{
 			Intent intent = new Intent();
 			PasswordActivity.PutIoConnectionToIntent(ioc, intent);
 			SetResult(Result.Ok, intent);
 			Finish();
+		}
+
+		private WritableRequirements RequestedWritableRequirements
+		{
+			get { return (WritableRequirements) Intent.GetIntExtra(ExtraKeyWritableRequirements, (int)WritableRequirements.ReadOnly); }
+		}
+
+		private void MoveToWritableLocation(IOConnectionInfo ioc)
+		{
+			_selectedIoc = ioc;
+
+			Intent intent = new Intent(this, typeof(FileStorageSelectionActivity));
+			intent.PutExtra(FileStorageSelectionActivity.AllowThirdPartyAppGet, false);
+			intent.PutExtra(FileStorageSelectionActivity.AllowThirdPartyAppSend, false);
+			
+			StartActivityForResult(intent, RequestCodeFileStorageSelectionForCopyToWritableLocation);	
 
 		}
 
-		private bool OnReceivedSftpData(string filename)
+		private bool OnReceivedSftpData(string filename, int requestCode, bool isForSave)
 		{
 			IOConnectionInfo ioc = new IOConnectionInfo { Path = filename };
 #if !EXCLUDE_FILECHOOSER
-			StartFileChooser(ioc.Path);
+			StartFileChooser(ioc.Path, requestCode, isForSave);
 #else
-			ReturnIoc(ioc);
+			IocSelected(ioc, requestCode);
 #endif
 			return true;
 		}
 
 #if !EXCLUDE_FILECHOOSER
-		private void StartFileChooser(string defaultPath)
+		private void StartFileChooser(string defaultPath, int requestCode, bool forSave)
 		{
 			Kp2aLog.Log("FSA: defaultPath="+defaultPath);
 			string fileProviderAuthority = FileChooserFileProvider.TheAuthority;
@@ -221,24 +385,35 @@ namespace keepass2android
 			Intent i = Keepass2android.Kp2afilechooser.Kp2aFileChooserBridge.GetLaunchFileChooserIntent(this, fileProviderAuthority,
 			                                                                                            defaultPath);
 
-			StartActivityForResult(i, Intents.RequestCodeFileBrowseForOpen);
+
+			if (forSave)
+			{
+				i.PutExtra("group.pals.android.lib.ui.filechooser.FileChooserActivity.save_dialog", true);
+				i.PutExtra("group.pals.android.lib.ui.filechooser.FileChooserActivity.default_file_ext", "kdbx");
+			}
+			StartActivityForResult(i, requestCode);
 		}
 
 #endif
-		private bool OnOpenButton(String fileName)
+		private bool OnOpenButton(String fileName, int requestCode)
 		{
 			
+
 			IOConnectionInfo ioc = new IOConnectionInfo
 			{
 				Path = fileName
 			};
 
-			ReturnIoc(ioc);
+			IocSelected(ioc, requestCode);
 
 			return true;
 
 		}
 
+		public void OnDismiss(IDialogInterface dialog)
+		{
+//			ReturnCancel();
+		}
 	}
 
 

src/keepass2android/Utils/LoadingDialog.cs

@@ -14,8 +14,8 @@ namespace keepass2android.Utils
 		private readonly Context _context;
 		private readonly string _message;
 		private readonly bool _cancelable;
-		readonly Func<Object[], Object> _doInBackground;
-		readonly Action<Object> _onPostExecute;
+		private readonly Func<Object[], Object> _doInBackground;
+		private readonly Action<Object> _onPostExecute;
 
 		private ProgressDialog mDialog;
 		/**
@@ -30,12 +30,13 @@ namespace keepass2android.Utils
 		private Exception mLastException;
 
 
-		public LoadingDialog(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
+		public LoadingDialog(IntPtr javaReference, JniHandleOwnership transfer)
+			: base(javaReference, transfer)
 		{
 		}
 
 		public LoadingDialog(Context context, string message, bool cancelable, Func<Object[], Object> doInBackground,
-			Action<Object> onPostExecute)
+		                     Action<Object> onPostExecute)
 		{
 			_context = context;
 			_message = message;
@@ -58,7 +59,8 @@ namespace keepass2android.Utils
 			}
 		}
 
-		public LoadingDialog(Context context, bool cancelable, Func<Object[], Object> doInBackground, Action<Object> onPostExecute)
+		public LoadingDialog(Context context, bool cancelable, Func<Object[], Object> doInBackground,
+		                     Action<Object> onPostExecute)
 		{
 			_message = context.GetString(Resource.String.loading);
 			_context = context;
@@ -89,7 +91,7 @@ namespace keepass2android.Utils
 					}
 
 				}
-				, mDelayTime);
+			                          , mDelayTime);
 		}
 
 
@@ -97,24 +99,33 @@ namespace keepass2android.Utils
 		 * If you override this method, you must call {@code super.onCancelled()} at
 		 * beginning of the method.
 		 */
-		protected override void OnCancelled() {
+
+		protected override void OnCancelled()
+		{
 			DoFinish();
 			base.OnCancelled();
-		}// onCancelled()
+		}
 
-		private void DoFinish() {
+// onCancelled()
+
+		private void DoFinish()
+		{
 			mFinished = true;
-			try {
+			try
+			{
 				/*
 				 * Sometime the activity has been finished before we dismiss this
 				 * dialog, it will raise error.
 				 */
 				mDialog.Dismiss();
-			} catch (Exception e)
+			}
+			catch (Exception e)
 			{
 				Kp2aLog.Log(e.ToString());
 			}
-		}// doFinish()
+		}
+
+// doFinish()
 
 
 		/**
@@ -124,18 +135,26 @@ namespace keepass2android.Utils
 		 * @param t
 		 *            {@link Throwable}
 		 */
-		protected void SetLastException(Exception e) {
+
+		protected void SetLastException(Exception e)
+		{
 			mLastException = e;
-		}// setLastException()
+		}
+
+// setLastException()
 
 		/**
 		 * Gets last exception.
 		 * 
 		 * @return {@link Throwable}
 		 */
-		protected Exception GetLastException() {
+
+		protected Exception GetLastException()
+		{
 			return mLastException;
-		}// getLastException()
+		}
+
+// getLastException()
 
 
 		protected override Object DoInBackground(params Object[] @params)
@@ -161,4 +180,37 @@ namespace keepass2android.Utils
 
 
 	}
+
+	public class SimpleLoadingDialog : LoadingDialog<object, object, object>
+	{
+		private class BackgroundResult : Object
+		{
+			private readonly Action _onPostExec;
+
+			public BackgroundResult(Action onPostExec)
+			{
+				_onPostExec = onPostExec;
+			}
+
+			public Action OnPostExec
+			{
+				get { return _onPostExec; }
+			}
+		}
+
+		public SimpleLoadingDialog(IntPtr javaReference, JniHandleOwnership transfer)
+			: base(javaReference, transfer)
+		{
+		}
+
+		public SimpleLoadingDialog(Context ctx, string message, bool cancelable, Func<Action> doInBackgroundReturnOnPostExec)
+			: base(ctx, message, cancelable, input =>
+				{ return new BackgroundResult(doInBackgroundReturnOnPostExec()); }
+				   , res => { ((BackgroundResult) res).OnPostExec(); })
+		{
+
+		}
+
+	}
+
 }

src/keepass2android/Utils/Util.cs

@@ -267,10 +267,29 @@ namespace keepass2android
 			}
 		}
 
+
+		class CancelListener: Java.Lang.Object, IDialogInterfaceOnCancelListener
+		{
+			private readonly Action _onCancel;
+
+			public CancelListener(Action onCancel)
+			{
+				_onCancel = onCancel;
+			}
+
+			public void OnCancel(IDialogInterface dialog)
+			{
+				_onCancel();
+			}
+		}
+
 		public static void ShowFilenameDialog(Activity activity, FileSelectedHandler onOpen, FileSelectedHandler onCreate, Action onCancel, bool showBrowseButton, string defaultFilename, string detailsText, int requestCodeBrowse)
 		{
 			AlertDialog.Builder builder = new AlertDialog.Builder(activity);
 			builder.SetView(activity.LayoutInflater.Inflate(Resource.Layout.file_selection_filename, null));
+			
+			if (onCancel != null)
+				builder.SetOnCancelListener(new CancelListener(onCancel));
 			Dialog dialog = builder.Create();
 			dialog.Show();
 
@@ -308,11 +327,13 @@ namespace keepass2android
 			cancelButton.Click += delegate
 				{
 					dialog.Dismiss();
-					
+					if (onCancel != null)
+						onCancel();
 				};
 
-			if (onCancel != null)
-				dialog.SetOnDismissListener(new DismissListener(onCancel));
+			
+
+			
 
 
 			ImageButton browseButton = (ImageButton) dialog.FindViewById(Resource.Id.browse_button);
@@ -324,7 +345,7 @@ namespace keepass2android
 				{
 					string filename = ((EditText) dialog.FindViewById(Resource.Id.file_filename)).Text;
 
-					Util.ShowBrowseDialog(activity, requestCodeBrowse, onCreate != null);
+					ShowBrowseDialog(activity, requestCodeBrowse, onCreate != null);
 
 				};
 

src/keepass2android/fileselect/FileSelectActivity.cs

@@ -133,6 +133,7 @@ namespace keepass2android
 				Intent intent = new Intent(this, typeof(SelectStorageLocationActivity));
 				intent.PutExtra(FileStorageSelectionActivity.AllowThirdPartyAppGet, true);
 				intent.PutExtra(FileStorageSelectionActivity.AllowThirdPartyAppSend, false);
+				intent.PutExtra(SelectStorageLocationActivity.ExtraKeyWritableRequirements, (int) SelectStorageLocationActivity.WritableRequirements.WriteDesired);
 				intent.PutExtra(FileStorageSetupDefs.ExtraIsForSave, false);
 				StartActivityForResult(intent, RequestCodeSelectIoc);	
 				                   

src/keepass2android/keepass2android.csproj

@@ -30,7 +30,7 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug</OutputPath>
-    <DefineConstants>DEBUG;EXCLUDE_TWOFISH;EXCLUDE_KEYBOARD;EXCLUDE_FILECHOOSER;EXCLUDE_JAVAFILESTORAGE;INCLUDE_KEYTRANSFORM</DefineConstants>
+    <DefineConstants>DEBUG;EXCLUDE_TWOFISH;EXCLUDE_KEYBOARD;INCLUDE_FILECHOOSER;EXCLUDE_JAVAFILESTORAGE;INCLUDE_KEYTRANSFORM</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <ConsolePause>False</ConsolePause>