feat: handle empty selection in file pickers

Adds error messages and logic to file pickers to handle cases where no file is selected.

- Includes new string resources for "no data" errors in document and media pickers.
- Modifies `DocumentFilePickerActivity` and `MediaFilePickerActivity` to check for `clipData` when `data` is null and set a canceled result with the appropriate error message if no file is found.

Author: naresh chocha

filepickerlibrary/src/main/java/com/nareshchocha/filepickerlibrary/ui/activitys/DocumentFilePickerActivity.kt

@@ -57,6 +57,12 @@ internal class DocumentFilePickerActivity : ComponentActivity() {
                     val data = result.data?.data
                     val filePath = data?.let { FileUtils.getRealPath(this, it) }
                     setSuccessResult(data, filePath)
+                } else if (result.data?.clipData != null) {
+                    val uri = result.data?.getClipDataUris()?.firstOrNull()
+                    val filePath = uri?.let { FileUtils.getRealPath(this, it) }
+                    setSuccessResult(uri, filePath)
+                } else {
+                    setCanceledResult(getString(R.string.document_file_picker_no_data_error))
                 }
             } else {
                 setCanceledResult("File Picker Result Error: ${result.resultCode}")

filepickerlibrary/src/main/java/com/nareshchocha/filepickerlibrary/ui/activitys/MediaFilePickerActivity.kt

@@ -58,6 +58,12 @@ internal class MediaFilePickerActivity : ComponentActivity() {
                     val data = result.data?.data
                     val filePath = data?.let { FileUtils.getRealPath(this, it) }
                     setSuccessResult(data, filePath)
+                } else if (result.data?.clipData != null) {
+                    val uri = result.data?.getClipDataUris()?.firstOrNull()
+                    val filePath = uri?.let { FileUtils.getRealPath(this, it) }
+                    setSuccessResult(uri, filePath)
+                } else {
+                    setCanceledResult(getString(R.string.media_file_picker_no_data_error))
                 }
             } else {
                 setCanceledResult("File Picker Result Error: ${result.resultCode}")

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

@@ -48,9 +48,11 @@
     <!-- Document file picker configuration error message -->
     <string name="document_file_picker_config_null_error">The document picker configuration is missing.</string>
     <string name="document_file_picker_permission_rationale">This app requires access to your storage in order to pick and manage documents. Please grant the storage permission to proceed.</string>
+    <string name="document_file_picker_no_data_error">No Document files found in the selected directory.</string>
 
     <!-- Media file picker configuration error message -->
     <string name="media_file_picker_config_null_error">The media file picker configuration is missing.</string>
     <string name="media_file_picker_permission_rationale">This app requires access to your storage to pick media files such as images and videos. Please grant the storage permission to continue.</string>
+    <string name="media_file_picker_no_data_error">No media files found in the selected directory.</string>
 
 </resources>