Question

我正在尝试通过调用意图ACTION_GET_CONTENT来获取用户选择的文件的路径。

问题是当从文件管理器中选择一个音频文件时，意图不会返回文件的扩展名（在我检查过的文件名中）。在视频或图像的情况下它工作正常。

以下是代码：

意图召唤：

Intent intent = getIntent();
if(intent.getAction() == null) {
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
        intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
    else
        intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    startActivityForResult(Intent.createChooser(intent, "Select a File to Upload"),CloudConstants.CLOUD_REQUEST_FILE_CHOOSER);

结果代码：

    if (data != null) {
    //Get URI Data from Intent - URI is of the file chosen by the User in the
    //File picker
    uriFileURI = data.getData();
    if(uriFileURI != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
    final int intFlags = data.getFlags()&(Intent.FLAG_GRANT_READ_URI_PERMISSION|Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
getContentResolver().takePersistableUriPermission(data.getData(), intFlags);
}
    //Check if URI was returned or not; NULL is returned if file was chosen from
    //via gallery share option
    //In such a case, the URI is retrieved from ClipData object of the Intent
    if (uriFileURI == null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN && data.getClipData().getItemCount() > 0)
        uriFileURI = data.getClipData().getItemAt(0).getUri();
    //Log File URI
    Log.i("CloudMedia", "File Uri: " + String.valueOf(uriFileURI));
    //Generate Absolute File name to publish on Title
    strFileName = getFileInformation(uriFileURI, MediaStore.Files.FileColumns.DISPLAY_NAME);

getFileInformation功能：

public String getFileInformation(Uri strFileURI, String strProjection) {
        Cursor cursorFileId = getContentResolver().query(strFileURI,
                new String[] {
                        strProjection
                }, null, null, null);
        if(cursorFileId.moveToFirst()) {
            return cursorFileId.getString(cursorFileId.getColumnIndex(strProjection));
        } else
            return null;
    }

因此strFileName不包含所选音频文件的扩展名。我也想要音频文件扩展名。

Answer 1

            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String imgFullPath = cursor.getString(columnIndex);
            cursor.close();//String file = uri.toString();

来源http://programmerguru.com/android-tutorial/how-to-pick-image-from-gallery/

Answer 2

尝试此代码。我使用了android.provider.OpenableColumns.DISPLAY_NAME而不是MediaStore.Files.FileColumns.DISPLAY_NAME，并在getContentResolver（）。query

中将投影设置为null

strFileName = getFileInformation(uriFileURI, android.provider.OpenableColumns.DISPLAY_NAME);

public String getFileInformation(Uri strFileURI, String strProjection) {
    Cursor cursorFileId = getContentResolver().query(strFileURI,
            null, null, null, null);
    if(cursorFileId.moveToFirst()) {
        return cursorFileId.getString(cursorFileId.getColumnIndex(strProjection));
    } else
        return null;
}

Android Intent ACTION_GET_CONTENT不返回文件扩展名

2 个答案: