如何从Android的下载文件夹中获取PDF的真实路径?

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英文:

How can i get PDF Real path from Download Folder in Android?

问题

我想从下载文件夹中下载的 PDF 的 URI 中获取真实路径。

我已经在这个链接中进行了操作。但是在这个链接中,我没有获得真实路径,而且出现了异常,如下所示:

URI

> content://com.android.providers.downloads.documents/document/msf%3A26

启动意图:

 Intent intent = new Intent();
 intent.setType("application/pdf");
 intent.setAction(Intent.ACTION_GET_CONTENT);
 startActivityForResult(Intent.createChooser(intent, "Select PDF"), PICK_PDF_REQUEST);

OnActivityResult:

if (requestCode == PICK_PDF_REQUEST) {
    if (resultCode == Activity.RESULT_OK) {
        Uri uri = data.getData();
        String path = null;
        try {
            path = getPDFPath(uri);
            LogUtils.logE(TAG, "Document :  " + path);
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }
    }
}


private String getPDFPath(Uri uri) {
    // DocumentProvider
    if (DocumentsContract.isDocumentUri(context, uri)) {
        // ExternalStorageProvider
        if ("com.android.externalstorage.documents".equals(uri.getAuthority())) {
            String documentId = DocumentsContract.getDocumentId(uri);
            String[] split = documentId.split(":");
            String type = split[0];
            return Environment.getExternalStorageDirectory().toString() + "/" + split[1];

        } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
            String decodedURI = Uri.decode(uri.toString());

            if (decodedURI.contains("raw:")) {
                return decodedURI.substring(decodedURI.indexOf("raw:") + 4);
            }

            String id = DocumentsContract.getDocumentId(Uri.parse(decodedURI));

            Uri contentUri = ContentUris.withAppendedId(
                    Uri.parse("content://downloads/public_downloads"), java.lang.Long.valueOf(id));

            return getDataColumn(contentUri, null, null);
        }
    }
    return null;
}
    
public String getDataColumn(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;
}

异常

 2020-05-04 14:47:09.747 17908-17908/ W/System.err: java.lang.NumberFormatException: For input string: "msf:26"
2020-05-04 14:47:09.748 17908-17908/W/System.err:     at java.lang.Long.parseLong(Long.java:594)
 2020-05-04 14:47:09.748 17908-17908/ W/System.err:     at java.lang.Long.valueOf(Long.java:808)

我想获得 PDF 的真实路径,以便于后续使用。

提前谢谢!!!

英文:

I want to get the real path of PDF from URI of the downloaded pdf from the download folder.

I am already following this link. But in this, I do not get the real path and getting exception. like below:

URI

> content://com.android.providers.downloads.documents/document/msf%3A26

Lunch Intent:

 Intent intent = new Intent();
 intent.setType("application/pdf");
 intent.setAction(Intent.ACTION_GET_CONTENT);
 startActivityForResult(Intent.createChooser(intent, "Select PDF"), PICK_PDF_REQUEST);

OnActivityResult:

if (requestCode == PICK_PDF_REQUEST) {
            if (resultCode == Activity.RESULT_OK) {
                Uri uri = data.getData();
                String path = null;
                try {
                    path = getPDFPath(uri);
                    LogUtils.logE(TAG, "Document :  " + path);
                } catch (URISyntaxException e) {
                    e.printStackTrace();
                }
          }
 }


     private String getPDFPath(Uri uri) {
            // DocumentProvider
            if (DocumentsContract.isDocumentUri(context, uri)) {
                // ExternalStorageProvider
                if ("com.android.externalstorage.documents".equals(uri.getAuthority())) {
                    String documentId = DocumentsContract.getDocumentId(uri);
                    String[] split = documentId.split(":");
                    String type = split[0];
                    return Environment.getExternalStorageDirectory().toString() + "/" + split[1];
    
                } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
                    String decodedURI = Uri.decode(uri.toString());
    
                    if (decodedURI.contains("raw:")) {
                        return decodedURI.substring(decodedURI.indexOf("raw:") + 4);
                    }
    
                    String id = DocumentsContract.getDocumentId(Uri.parse(decodedURI));
    
                    Uri contentUri = ContentUris.withAppendedId(
                            Uri.parse("content://downloads/public_downloads"), java.lang.Long.valueOf(id));
    
                    return getDataColumn(contentUri, null, null);
                }
            }
            return null;
        }
    
        public String getDataColumn(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;
        }

Exception

 2020-05-04 14:47:09.747 17908-17908/ W/System.err: java.lang.NumberFormatException: For input string: "msf:26"
2020-05-04 14:47:09.748 17908-17908/W/System.err:     at java.lang.Long.parseLong(Long.java:594)
 2020-05-04 14:47:09.748 17908-17908/ W/System.err:     at java.lang.Long.valueOf(Long.java:808)

I want Real path of PDF so I can use it for further use.

Thanks in Advance!!!

答案1

得分: 2

不需要获取“真实”路径。

没有必要。

直接使用 URI。

现在我们都是这样做的。

加入我们。

英文:

No need to get a 'real' path.

There is no need for it.

Just use the uri as is.

We all do like this these days.

Join us.

huangapple
  • 本文由 发表于 2020年5月4日 17:22:58
  • 转载请务必保留本文链接:https://go.coder-hub.com/61588924.html
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