在 Android 10 中,您无法将直接文件转换为 URI。相反,您可以将文件复制到文件目录中,以获取文件对象。
File f = getFile(getApplicationContext(), uri)
下面的方法为您提供URI文件对象,并且您在文件目录中也有该文件的副本。
public static File getFile(Context context, Uri uri) throws IOException {
File destinationFilename = new File(context.getFilesDir().getPath() + File.separatorChar + queryName(context, uri));
try (InputStream ins = context.getContentResolver().openInputStream(uri)) {
createFileFromStream(ins, destinationFilename);
} catch (Exception ex) {
Log.e("Save File", ex.getMessage());
ex.printStackTrace();
}
return destinationFilename;
}
public static void createFileFromStream(InputStream ins, File destination) {
try (OutputStream os = new FileOutputStream(destination)) {
byte[] buffer = new byte[4096];
int length;
while ((length = ins.read(buffer)) > 0) {
os.write(buffer, 0, length);
}
os.flush();
} catch (Exception ex) {
Log.e("Save File", ex.getMessage());
ex.printStackTrace();
}
}
private static String queryName(Context context, Uri uri) {
Cursor returnCursor =
context.getContentResolver().query(uri, null, null, null, null);
assert returnCursor != null;
int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
returnCursor.moveToFirst();
String name = returnCursor.getString(nameIndex);
returnCursor.close();
return name;
}
如需更多详细信息,请参阅此处