无法获取所选文件名的完整真实路径

ccgok5k5  于 2021-07-08  发布在  Java
关注(0)|答案(2)|浏览(816)

这个问题在这里已经有答案了：

android kotlin：获取一个filenotfoundexception，其文件名是从文件选择器中选择的(3个答案）
android-获取从文件资源管理器中选择的.txt文件的实际路径（1个答案）
上个月关门了。
我没有获取当前路径var name“filepath”而是获取值e/file 路径：/document/29但我选择的文件存储在下载文件夹文件名是“test.xlsx”我需要原始路径文件名和文件扩展名传入fileinputstream（）。我无法修复它…有人能给出代码吗
btnimport.setonclicklistener（新视图.onclicklistener（）{

  1. @Override
  2.             public void onClick(View v) {
  3.                 Intent fileintent = new Intent(Intent.ACTION_GET_CONTENT);
  4.                 fileintent.setType("*/*");
  5.                 try {
  6.                     startActivityForResult(fileintent, requestcode);
  7.                 } catch (ActivityNotFoundException e) {
  8.                     lbl.setText("No activity can handle picking a file. Showing alternatives.");
  9.                 }
  11. protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  12.         if (data == null)
  13.             return;
  14.         switch (requestCode) {
  15.             case requestcode:
  16.                 String FilePath = data.getData().getPath();
  18.                 Log.e("File path", FilePath);
  20.                 if (FilePath.contains("/root_path"))
  21.                     FilePath = FilePath.replace("/root_path", "");
  23.                 Log.e("New File path", FilePath);
  25.                 try {
  26.                     if (resultCode == RESULT_OK) {
  27.                         AssetManager am = this.getAssets();
  28.                         InputStream inStream;
  29.                         Workbook wb = null;
  31.                         try {
  32.                             inStream = new FileInputStream(FilePath);
  33.                             Log.e("Extension",FilePath.substring(FilePath.lastIndexOf(".")));
  35.                             if (FilePath.substring(FilePath.lastIndexOf(".")).equals(".xls")) {
  36.                                 Log.e("File Type", "Selected file is XLS");
  37.                                 wb = new HSSFWorkbook(inStream);
  38.                             }
  39.                             else if (FilePath.substring(FilePath.lastIndexOf(".")).equals(".xlsx")) {
  40.                                 Log.e("File Type", "Selected file is XLSX");
  41.                                 wb = new XSSFWorkbook(inStream);
  42.                             }
  43.                             else {
  44.                                 wb = null;
  45.                                 lbl.setText("Please select a valid Excel file");
  46.                                 return;
  48.                             }
  50.                             inStream.close();
JavaandroidFilePathandroid-intent

2条答案

按热度按时间
h7appiyu

h7appiyu1#

使用它将返回文件的实际路径

  1. public class FileUtils {
  3. public static String getRealPath(Context context, Uri uri) {
  4.     String realPath;
  5.     realPath = FileUtils.getRealPath_API19(context, uri);
  6.     return realPath;
  7. }
  9. @SuppressLint("NewApi")
  10. public static String getRealPath_API19(final Context context, final Uri uri) {
  12.     // DocumentProvider
  13.     if (DocumentsContract.isDocumentUri(context, uri)) {
  15.         // ExternalStorageProvider
  16.         if (isExternalStorageDocument(uri)) {
  17.             final String docId = DocumentsContract.getDocumentId(uri);
  18.             final String[] split = docId.split(":");
  19.             final String type = split[0];
  21.             if ("primary".equalsIgnoreCase(type)) {
  22.                 return Environment.getExternalStorageDirectory() + "/"
  23.                         + split[1];
  24.             }
  25.         }
  26.         // DownloadsProvider
  27.         else if (isDownloadsDocument(uri)) {
  29.             final String id = DocumentsContract.getDocumentId(uri);
  30.             final Uri contentUri = ContentUris.withAppendedId(
  31.                     Uri.parse("content://downloads/public_downloads"),
  32.                     Long.parseLong(id));
  34.             return getDataColumn(context, contentUri, null, null);
  35.         }
  36.         // MediaProvider
  37.         else if (isMediaDocument(uri)) {
  38.             final String docId = DocumentsContract.getDocumentId(uri);
  39.             final String[] split = docId.split(":");
  40.             final String type = split[0];
  42.             Uri contentUri = null;
  43.             if ("image".equals(type)) {
  44.                 contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
  45.             } else if ("video".equals(type)) {
  46.                 contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
  47.             } else if ("audio".equals(type)) {
  48.                 contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
  49.             }
  51.             final String selection = "_id=?";
  52.             final String[] selectionArgs = new String[] { split[1] };
  54.             return getDataColumn(context, contentUri, selection,
  55.                     selectionArgs);
  56.         }
  57.     }
  58.     // MediaStore (and general)
  59.     else if ("content".equalsIgnoreCase(uri.getScheme())) {
  61.         // Return the remote address
  62.         if (isGooglePhotosUri(uri))
  63.             return uri.getLastPathSegment();
  65.         return getDataColumn(context, uri, null, null);
  66.     }
  67.     // File
  68.     else if ("file".equalsIgnoreCase(uri.getScheme())) {
  69.         return uri.getPath();
  70.     }
  72.     return null;
  73. }
  75. /**
  76.  * Get the value of the data column for this Uri. This is useful for
  77.  * MediaStore Uris, and other file-based ContentProviders.
  78.  *
  79.  * @param context
  80.  *            The context.
  81.  * @param uri
  82.  *            The Uri to query.
  83.  * @param selection
  84.  *            (Optional) Filter used in the query.
  85.  * @param selectionArgs
  86.  *            (Optional) Selection arguments used in the query.
  87.  * @return The value of the _data column, which is typically a file path.
  88.  */
  89. public static String getDataColumn(Context context, Uri uri,
  90.                                    String selection, String[] selectionArgs) {
  92.     Cursor cursor = null;
  93.     final String column = "_data";
  94.     final String[] projection = { column };
  96.     try {
  97.         cursor = context.getContentResolver().query(uri, projection,
  98.                 selection, selectionArgs, null);
  99.         if (cursor != null && cursor.moveToFirst()) {
  100.             final int index = cursor.getColumnIndexOrThrow(column);
  101.             return cursor.getString(index);
  102.         }
  103.     } finally {
  104.         if (cursor != null)
  105.             cursor.close();
  106.     }
  107.     return null;
  108. }
  110. /**
  111.  * @param uri
  112.  *            The Uri to check.
  113.  * @return Whether the Uri authority is ExternalStorageProvider.
  114.  */
  115. public static boolean isExternalStorageDocument(Uri uri) {
  116.     return "com.android.externalstorage.documents".equals(uri
  117.             .getAuthority());
  118. }
  120. /**
  121.  * @param uri
  122.  *            The Uri to check.
  123.  * @return Whether the Uri authority is DownloadsProvider.
  124.  */
  125. public static boolean isDownloadsDocument(Uri uri) {
  126.     return "com.android.providers.downloads.documents".equals(uri
  127.             .getAuthority());
  128. }
  130. /**
  131.  * @param uri
  132.  *            The Uri to check.
  133.  * @return Whether the Uri authority is MediaProvider.
  134.  */
  135. public static boolean isMediaDocument(Uri uri) {
  136.     return "com.android.providers.media.documents".equals(uri
  137.             .getAuthority());
  138. }
  140. /**
  141.  * @param uri
  142.  *            The Uri to check.
  143.  * @return Whether the Uri authority is Google Photos.
  144.  */
  145. public static boolean isGooglePhotosUri(Uri uri) {
  146.     return "com.google.android.apps.photos.content".equals(uri
  147.             .getAuthority());
  148. }
  149. }

像这样使用

  1. String realPath = FileUtils.getRealPath(context, uri);

之后使用这个路径并创建新文件和文件的getrealname。

展开查看全部
赞(0）分享  回复(0）举报  2021-07-09
fwzugrvs

fwzugrvs2#

我需要具有文件扩展名的文件名的原始路径来传入fileinputstream（）。
不，您不需要“真正的路径”，因为您最好使用获得的uri来打开输入流。

  1. InputStream is = getContentResolver().openInputStream(data.getData());

像使用你想要的流一样使用它。

赞(0）分享  回复(0）举报  2021-07-09
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