Use Android picker for local vaults

.gitignore

@@ -1,6 +1,7 @@
 build/
 *.apk
 keepassgo
+android/keepassgo-android.jar
 packaging/archlinux/keepassgo-git/*.pkg.tar.zst
 packaging/archlinux/keepassgo-git/PKGBUILD
 packaging/archlinux/keepassgo-git/pkg/

main.go

@@ -1559,6 +1559,44 @@ func (u *ui) startChooseSyncLocalSourceAction() {
 	})
 }
 
+func pickedDocumentName(file io.ReadCloser, fallback string) string {
+	if named, ok := file.(interface{ Name() string }); ok {
+		if base := filepath.Base(strings.TrimSpace(named.Name())); base != "" && base != "." && base != string(filepath.Separator) {
+			return base
+		}
+	}
+	fallback = filepath.Base(strings.TrimSpace(fallback))
+	if fallback == "" || fallback == "." || fallback == string(filepath.Separator) {
+		return "selected-vault.kdbx"
+	}
+	return fallback
+}
+
+func (u *ui) startChooseVaultPathAction() {
+	if runtime.GOOS != "android" || u.fileExplorer == nil {
+		u.runAction("choose vault path", func() error { return u.chooseExistingFileAction(&u.vaultPath) })
+		return
+	}
+	u.runBackgroundAction("choose vault file", func() (func() error, error) {
+		file, err := u.fileExplorer.ChooseFile(".kdbx")
+		if err != nil {
+			if errors.Is(err, explorer.ErrUserDecline) {
+				return func() error { return nil }, nil
+			}
+			return nil, err
+		}
+		defer file.Close()
+		content, err := io.ReadAll(file)
+		if err != nil {
+			return nil, err
+		}
+		name := pickedDocumentName(file, "selected-vault.kdbx")
+		return func() error {
+			return u.importSharedVaultBytesAction(name, content)
+		}, nil
+	})
+}
+
 func (u *ui) startImportSharedVaultAction() {
 	if !supportsSharedVaultImport(runtime.GOOS) || u.fileExplorer == nil {
 		return
@@ -4386,7 +4424,7 @@ func (u *ui) layout(gtx layout.Context) layout.Dimensions {
 		if u.lifecycleBusy() {
 			continue
 		}
-		u.runAction("choose vault path", func() error { return u.chooseExistingFileAction(&u.vaultPath) })
+		u.startChooseVaultPathAction()
 	}
 	for u.importSharedVault.Clicked(gtx) {
 		if u.lifecycleBusy() {

main_test.go

@@ -159,6 +159,42 @@ func TestUIMasterPasswordUsesPasswordInputHint(t *testing.T) {
 	}
 }
 
+func TestLocalVaultPathHelpForAndroidUsesChooserLanguage(t *testing.T) {
+	t.Parallel()
+
+	if got := localVaultPathHelpForRuntime("android"); got != "Choose the existing .kdbx file to open." {
+		t.Fatalf("localVaultPathHelpForRuntime(android) = %q, want chooser guidance", got)
+	}
+}
+
+func TestPickedDocumentNameUsesFileBaseName(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	path := filepath.Join(dir, "mint-ledger.kdbx")
+	if err := os.WriteFile(path, []byte("mint"), 0o600); err != nil {
+		t.Fatalf("WriteFile(%q) error = %v", path, err)
+	}
+	file, err := os.Open(path)
+	if err != nil {
+		t.Fatalf("Open(%q) error = %v", path, err)
+	}
+	t.Cleanup(func() { _ = file.Close() })
+
+	if got := pickedDocumentName(file, "selected-vault.kdbx"); got != "mint-ledger.kdbx" {
+		t.Fatalf("pickedDocumentName(file, fallback) = %q, want mint-ledger.kdbx", got)
+	}
+}
+
+func TestPickedDocumentNameFallsBackWhenUnnamed(t *testing.T) {
+	t.Parallel()
+
+	reader := io.NopCloser(strings.NewReader("mint"))
+	if got := pickedDocumentName(reader, "crew-ledger.kdbx"); got != "crew-ledger.kdbx" {
+		t.Fatalf("pickedDocumentName(reader, fallback) = %q, want crew-ledger.kdbx", got)
+	}
+}
+
 func TestUISearchBehaviorIsConsistentAcrossDesktopAndPhoneLayouts(t *testing.T) {
 	t.Parallel()
 

ui_forms.go

@@ -1140,13 +1140,17 @@ func labeledEditorHelp(th *material.Theme, label, help string, editor *widget.Ed
 	return labeledEditorHelpFocus(th, defaultAccessibilityPreferences(), label, help, editor, sensitive, false)
 }
 
-func localVaultPathHelp() string {
-	if supportsDesktopFilePicker(runtime.GOOS) {
+func localVaultPathHelpForRuntime(goos string) string {
+	if supportsDesktopFilePicker(goos) || supportsSharedVaultImport(goos) {
 		return "Choose the existing .kdbx file to open."
 	}
 	return "Enter the shared-storage path to the existing .kdbx file, for example /sdcard/Download/vault.kdbx."
 }
 
+func localVaultPathHelp() string {
+	return localVaultPathHelpForRuntime(runtime.GOOS)
+}
+
 func keyFileHelp() string {
 	if supportsDesktopFilePicker(runtime.GOOS) {
 		return "Optional path to a KeePass-compatible key file."
@@ -1155,7 +1159,7 @@ func keyFileHelp() string {
 }
 
 func localPathSelector(th *material.Theme, editor *widget.Editor, click *widget.Clickable) layout.Widget {
-	if supportsDesktopFilePicker(runtime.GOOS) {
+	if supportsDesktopFilePicker(runtime.GOOS) || supportsSharedVaultImport(runtime.GOOS) {
 		return selectorEditorHelp(th, "Vault Path", localVaultPathHelp(), editor, click, "Choose File", false)
 	}
 	return labeledEditorHelp(th, "Vault Path", localVaultPathHelp(), editor, false)