A Java Interface, as first glance, may look similar to a class. However, there are important differences, not only in how it is used, but in defining it from a class that make it worth noting. Uses of an Interface Java prevents a developer from extending a Class with two or more classes. This is…
We’ve looked at the TextFormField in Flutter, almost exclusively at this point. However there are other form fields. These are often styled to work appropriately on a mobile device, so while they might seem like a web form field, it may look different. Toggle Buttons – Collections of buttons which can be toggled either to…
In our previous example, we saw how to get the text field value when we the field was changing, but what about if we want to get it on demand, like when we press a button? Turns out, it is a similar process as to what we just did. The FloatingActionButton First, in our app…
Being able to work with a form field, to get values, know when it has been updated, etc, are important aspects for any form work. In this example we’re going to look at detecting when a TextFormField changes and getting those values. We are going to use the previous example of Form Fields in Flutter….
In this example we need to look at how to build a form within Flutter. Forms are important if we want to get information from our users to send to a server so it can be used in other areas. Our first step will be to build the generic app, and then remove most everything…
Passing arguments to a flutter navigation is important as it allows for more dynamic content, just as you might find with a dynamic website. To pass arguments, we will need to build a class to hold the arguments, and a Widget that can extract them. Then we will need to update the navigation. We will…
Now that we’ve seen the basics of Flutter navigation, we want to add to our capabilities. We are going to keep going off of our last example with the two screens to navigate between. However, we will be changing some things. Updating our main In our main file, we currently create our app, and set…
Since most apps have multiple screens, we want to find a way to move from one screen to another using Flutter. Mobile apps use a queue to track which screen is currently being shown, and which screens have previously been shown. When you want to add a screen, you push it onto the stack. When…
