Requirement Analysis

The first step in building our application is to do a requirement analysis. What functionality will the application perform? Here, we want to provide the following functionality to the user:

• Display the blood sugar values of the current day as a diagram, as shown in Figure 9.1. The x-axis is the time, ranging from 6 to 22 o'clock. The y-axis is the blood sugar level in mg/dl ranging from 40 to 280.
  
  

  Figure 9.1. The running BloodSugarMidp application showing the logged blood sugar values of the current day.

  

  
  
• Track hypoglycemic values that are lower than 80 mg/dl and hyperglycemic values that are higher than 160 by drawing red lines on the chart at 80 and 160 mg/dl.
  
  
• Enable the user to enter new values.
  
  
• Enable the user to delete erratic values.
  
  
• Enable the user to switch to previous logs.
  
  

In accordance with the design guidelines, persistent storage shall be performed in the background.