![]() The newly released official Android Architecture Components provide the LiveData class, which has a subclass called MutableLiveData. While using edit text in XML layout, we must specify its inputType attribute which configures the keyboard according to input type. The EditText is a user interface which is used for entering and changing the text. ![]() Step 2 Add the following code to res/layout/activitymain.xml. ![]() So if you have multiple Activities, then you need to share data between them in such a way, that you take it into consideration that both activities can be started up at any time as the first Activity of the app.įor this, what you need to do is not "set the text view's text directly from another class", but you need to modify observable shared data. Step 1 Create a new project in Android Studio, go to File New Project and fill all required details to create a new project. People think that only the Activity that has the MAIN/LAUNCHER intent filter can be launched at start-up, but this is false.Īny Activity can act as the "first Activity", because Android can restart it from any point with the current active navigation stack.Īnyways, with that in mind, an Activity can show a View, and people often use the Activity to hold each screen of their app (instead of using it as an entry point, and swapping out view controllers in it ~ fragments). This is actually a deceptively "simple" question, but in reality a complicated problem in the context of Android development.Īctivities are the "process entry point", meaning that any Activity you see can act as the "first point of entry to your application on start-up".
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