英文:
How can i delete a file with only the content uri?
问题
在 API 29 之前，我使用从 MediaStore.Audio.Media.DATA 列中获取的路径来删除文件，但该列现已弃用。
现在我这样做
song.setData(ContentUris.withAppendedId(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID))));
但这会返回一个类似于这样的 内容 URI：content://media/external/audio/media/92079
在之前，我只需对内部存储上的文件执行 file.delete 操作，对外部存储上的文件执行 documentFile.delete() 操作。
但现在我只有 内容 URI，而没有媒体文件的路径，所以不能再这样操作了。
那么，如何在不依赖于 MediaStore.Audio.Media.DATA 获得媒体文件路径的情况下删除文件呢？
在 API 29 之前使用 DATA 列的完整代码
private void deleteFile(Uri uri, File file){
if (file.delete()){
Log.i(TAG, "内部删除！");
return;
}
if (getActivity() != null && file.exists()) {
DocumentFile pickedDir = DocumentFile.fromTreeUri(getActivity(), uri);
String filename = file.getName();
try {
getActivity().getContentResolver().takePersistableUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
} catch (SecurityException e) {
Log.e(TAG, "删除文件路径时捕获到 SecurityException！", e);
}
Log.d(TAG, "文件名：" + filename);
if (pickedDir != null) {
DocumentFile documentFile = pickedDir.findFile(filename);
if (documentFile != null && documentFile.exists()) {
if (documentFile.delete()) {
Log.i(TAG, "删除成功");
} else {
Log.i(TAG, "删除失败");
}
}
}
}
}
英文:
Before API 29 i deleted files with the path i got from MediaStore.Audio.Media.DATA column which is now deprecated.
Now i do it like this
song.setData(ContentUris.withAppendedId(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID))));
But this returns a content uri which looks like this: content://media/external/audio/media/92079
Before i just did file.delete for files on internal storage and documentFile.delete() for files on external storage.
But now that i only have the content uri and not a path to the media file it doesn't work anymore.
So how can i delete files without relying on the MediaStore.Audio.Media.DATA for a path to the media file?
Full code which worked before API 29 and using the DATA column
private void deleteFile(Uri uri, File file){
if (file.delete()){
Log.i(TAG,"internal delete!");
return;
}
if (getActivity() != null && file.exists()) {
DocumentFile pickedDir = DocumentFile.fromTreeUri(getActivity(), uri);
String filename = file.getName();
try {
getActivity().getContentResolver().takePersistableUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
} catch (SecurityException e) {
Log.e(TAG, "SecurityException caught when deleting FilePath!", e);
}
Log.d(TAG, "fileName: " + filename);
if (pickedDir != null) {
DocumentFile documentFile = pickedDir.findFile(filename);
if (documentFile != null && documentFile.exists()) {
if (documentFile.delete()) {
Log.i(TAG, "Delete successful");
} else {
Log.i(TAG, "Delete unsuccessful");
}
}
}
}
}
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