Why can't I edit the call log for an unsaved incoming number?

Question

I want to edit a call log history. I wrote simple code for editing the call log. I put CACHED_NAME or other name variables, but I didn't see any changes in the call log. Why doesn't it work? Here is my code:

ContentValues values = new ContentValues();
values.put(CallLog.Calls.CACHED_NAME, "Edited Name");
getContentResolver().update(CallLog.Calls.CONTENT_URI,
values, CallLog.Calls.NUMBER + "=?", new String[] { String.valueOf(number) });

Edit: I added write and read call log permissions in the manifest file.

Answer 1

Because the system doesn't want random apps to be able to update the call log with possibly incorrect data. So they don't export that capability to just any app- you have to be the registered telecom app.