Graphs and data plots are wonderful tools for illustrating relationships, depicting data trends, and tracking goals in your Android applications. I saw this for myself several years ago, when a former student of mine won first place in a student mobile app competition sponsored by the Charleston Defense Contractors Association. A key feature of the winning app, “Diabetes and Me,” was the ability to graph daily sugar levels.
As another example, consider a weight-tracking application that plots progress against a goal weight. Figure 1 illustrates how such an application might look on an Android phone. The figure uses a red line-graph to show average monthly weights for the year 2017. It shows the goal weight as a green straight line near the bottom. (Although the data values shown in the line graph are hypothetical, they are realistic pertaining to the author of this article.)
