Android uses databinding to set the null state

Write in front

During normal development, we need to show the data loading:

There are many ways to set the page status. Recently, the author has been using data binding, and the way of data binding to display the view by changing the model is also fully consistent with the setting of the status page.

So let's talk about using data binding to set various status pages in Android. It's very simple. Let's see the effect first

first

Open databinding in the build.gradle file of the app

Let's first define some annotations emptystate for state

Another custom exception, emptyexception, is used to display the status information we need

Now, most controls that display status pages provide

So our goal is to show these

layout

Layout in the form of data binding, and use statemodel to control the messages displayed on the status page

There are several methods in the layout file

We define the ViewModel of the state, called statemodel, to control the state

A very common view model mainly has several methods for judging the status display

The practical application is as follows:

In the activity or fragment layout, add the layout of the status page

Finally, in activity or fragment, we can easily set various states through state. Bindthrowable() and state. Setemptystate() methods.

Write at the end

For those who want to use data to control the view state, using data binding is really a way to get twice the result with half the effort. And it's easy to understand.

Last demo address: statebinding_ jb51.rar

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