Android widget textview not updating
Mind that this would completely replace an original text.
Instead IDs are added (that’s why we use ) or generated when the app is started.
Open activity_file and add android:id attribute to Text View using above example.
This line displays on device screen layout resource – in this case activity_file.
By the way maybe you have noticed that adding this code also resulted in a new line in import section at the top of Main file: Import is used to add predefined Android or Java classes from other packages, but we don’t have to bother about it as Android Studio adds import lines automatically as we start to use some classes. Now we have to assign Text View from layout file to Text View variable.
First add a new definition to file: There is one more option.
As an argument of set Text() we could also use a String variable (so the variable storing a text).
tags: activity_main.xml, adding id, android.widget. Text View, android:id, append, find View By Id, get Resources, get String, get Text, id, import, looking for id, on Create, set Text, string, strings.xml, Text View, to String).
We’re going to use concepts like classes, methods and variables explained there. Text View is also Android class for displaying text.
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Developing an Android home screen app widget is not for the faint of heart.
If we want to add something to a text displayed by Text View, we don’t need to get text first, modify it and set that text again. Of course we still need to refer to Text View element found via find View By Id().