java.io.FileNotFoundException 处理请求时捕获：/document/raw:/storage/emulated/0/Download/mypdf.pdf（没有这样的文件或目录）

Question

我想使用多部分请求将 pdf 发送到我的服务器。我能够正确选择文件并获取其名称，但是当我发送此 pdf 时，我正在发送以下路径 /document/raw:/storage/emulated/0/Download/kitchenapp.pdf。路径是正确的，文件在那里，但我得到了这个异常。 I/DefaultRequestDirector: I/O exception (java.io.FileNotFoundException) caught when processing request: /document/raw:/storage/emulated/0/Download/kitchenapp.pdf (No such file or directory)

到目前为止我做了什么.. 通过这个获取 pdf

 Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("application/pdf");
    intent.addCategory(Intent.CATEGORY_OPENABLE);

    try {
        startActivityForResult(
                Intent.createChooser(intent, "Select a File to Upload"),
                1);
    } catch (android.content.ActivityNotFoundException ex) {
        Toast.makeText(getActivity(), "Please install a File Manager.",
                Toast.LENGTH_SHORT).show();
    }

由此获取onActivity结果

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 1 && resultCode == RESULT_OK && data != null && data.getData() != null) {
        Uri selectedFileURI = data.getData();
         file = new File(selectedFileURI.getPath().toString());
        Log.d("", "File : " + file.getName());
        String uploadedFileName = file.getName().toString();
        System.out.println("upload file name "+uploadedFileName);

        System.out.println("my location "+file);



    }
}

通过多部分请求发送此文件

  if (file != null ) {


                entity.addPart("file", new FileBody(file));
            }

            // totalSize = entity.getContentLength();
            httppost.setEntity(entity);

            // Making server call
            HttpResponse response = httpclient.execute(httppost);
            HttpEntity r_entity = response.getEntity();

任何帮助将不胜感激..

Answer 1

这些行帮助了我：

 if (isDownloadsDocument(uri)) {// DownloadsProvider
            final String id = DocumentsContract.getDocumentId(uri);
            if (!TextUtils.isEmpty(id)) {
                if (id.startsWith("raw:")) {
                    return id.replaceFirst("raw:", "");
                }
                try {
                    final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                    return getDataColumn(context, contentUri, null, null);
                } catch (NumberFormatException e) {
                    return null;
                }
            }
        }

Answer 2

我刚刚修复了代码 sn-p from this brilliant answer 中的 NumberFormat 崩溃。你可以通过代码here找到我的答案。

Answer 3

我正在使用以下代码从 URI 获取路径：

@Nullable
public static String getPath(Context context, Uri uri) {
    // DocumentProvider
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, uri)) {
        // ExternalStorageProvider
        if (isExternalStorageDocument(uri)) {
            final String docId = DocumentsContract.getDocumentId(uri);
            final String[] split = docId.split(":");
            final String type = split[0];

            if ("primary".equalsIgnoreCase(type)) {
                return Environment.getExternalStorageDirectory() + "/" + split[1];
            }
        } else if (isDownloadsDocument(uri)) {// DownloadsProvider
            final String id = DocumentsContract.getDocumentId(uri);
            final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
            return getDataColumn(context, contentUri, null, null);

        } else if (isMediaDocument(uri)) { // MediaProvider
            final String docId = DocumentsContract.getDocumentId(uri);
            final String[] split = docId.split(":");
            final String type = split[0];
            Uri contentUri = null;
            if ("image".equals(type)) {
                contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
            } else if ("video".equals(type)) {
                contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
            } else if ("audio".equals(type)) {
                contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
            }
            final String selection = "_id=?";
            final String[] selectionArgs = new String[]{split[1]};
            return getDataColumn(context, contentUri, selection, selectionArgs);

        }
    } else if ("content".equalsIgnoreCase(uri.getScheme())) {// MediaStore (and general)
        // Return the remote address
        if (isGooglePhotosUri(uri))
            return uri.getLastPathSegment();
        return getDataColumn(context, uri, null, null);

    } else if ("file".equalsIgnoreCase(uri.getScheme())) {// File
        return uri.getPath();
    }
    return null;
}

public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {column};
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                final int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is Google Photos.
     */
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }

在onActivityResult() 方法中，您应该：

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1 && resultCode == RESULT_OK && data != null && data.getData() != null) {
            Uri selectedFileURI = data.getData();
            String fullPath = getPath(context, selectedFileURI);
            file = new File(fullPath);
            //.....
        }
    }

记住：在您的 Manifest.xml 文件中声明读/写外部存储权限

Answer 4

我认为您运行的是 Android 6.0 Marshmallow (API 23) 或更高版本。如果是这种情况，您必须在尝试读/写外部存储之前实现Runtime Permissions。

记住：-这仅在目标 SDK 为 23 或更高版本时有效。因此，在这种情况下，您已降级到 android APK 19 KitKat，然后它就可以正常工作了。并且还在您的 Android.Manifest 文件中声明读写权限。