Question

is there anyway to remove a missed call notification by code? And somehow remove the last missed call from call history?

Answer 1

yes, it is possible.Try this:

Uri UriCalls = Uri.parse("content://call_log/calls");
Cursor cursor = getApplicationContext().getContentResolver().query(UriCalls, null, null, null, null);

Reading call log entries…

if(cursor.getCount() > 0){
    cursor.moveToFirst();
    while(!cursor.isAfterLast()){
        String number = cursor.getString(cursor.getColumnIndex(CallLog.Calls.NUMBER)); // for  number
        String name = cursor.getString(cursor.getColumnIndex(CallLog.Calls.CACHED_NAME));// for name
        String duration = cursor.getString(cursor.getColumnIndex(CallLog.Calls.DURATION));// for duration
        int type = Integer.parseInt(cursor.getString(cursor.getColumnIndex(CallLog.Calls.TYPE)));// for call type, Incoming or out going
        cursor.moveToNext();
    }
}

Deleting entry in call log…

String queryString= "NUMBER='" + number + "'";
if (cursor.getCount() > 0){
        getApplicationContext().getContentResolver().delete(UriCalls, queryString, null);
}

Permission:

<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />

Note: Please refer this doc over call log for more clearity.

Using the above code you can get the desired result.