Android get call history

Like this.

private void getCallDetails() {
        ContentResolver cr = mActivity.getContentResolver();
        Cursor managedCursor = cr.query( CallLog.Calls.CONTENT_URI,null, null,null, null);
        int number = managedCursor.getColumnIndex( CallLog.Calls.NUMBER );
        int type = managedCursor.getColumnIndex( CallLog.Calls.TYPE );
        int date = managedCursor.getColumnIndex( CallLog.Calls.DATE);
        int duration = managedCursor.getColumnIndex( CallLog.Calls.DURATION);
        StringBuffer sb = new StringBuffer();
        sb.append( "Call Details :");
        while ( managedCursor.moveToNext() ) {
            String phNumber = managedCursor.getString( number );
            String callType = managedCursor.getString( type );
            String callDate = managedCursor.getString( date );
            Date callDayTime = new Date(Long.valueOf(callDate));
            String callDuration = managedCursor.getString( duration );
            String dir = null;
            int dircode = Integer.parseInt( callType );
            switch( dircode ) {
            case CallLog.Calls.OUTGOING_TYPE:
                dir = "OUTGOING";
                break;

            case CallLog.Calls.INCOMING_TYPE:
                dir = "INCOMING";
                break;

            case CallLog.Calls.MISSED_TYPE:
                dir = "MISSED";
                break;
            }
            sb.append( "\nPhone Number:--- "+phNumber +" \nCall Type:--- "+dir+" \nCall Date:--- "+callDayTime+" \nCall duration in sec :--- "+callDuration );
            sb.append("\n----------------------------------");
        }
        System.out.print(sb);
        managedCursor.close();
    }