I'm making an animal pictorial book using the 4th edition of the first Android Studio.
I added a constraint in android studio so that the imageView is in the center of the screen, but I get a yellow error.
Android Studio version 3.3.1
API 19 Android 4.4 (kitkat)
xmlns: app = "http://schemas.android.com/apk/res-auto" xmlns: tools = "http://schemas.android.com/tools"
android: layout_width = "match_parent"
android: layout_height = "match_parent"
tools: context = ". GiraffeFragment" android: id = "@ + id/frameLayout3">
android: layout_width = "wrap_content"
android: layout_height = "wrap_content"
android: id = "@ + id/imageView4" app: layout_constraintTop_toTopOf = "parent"
android: layout_marginTop = "8dp" app: layout_constraintStart_toStartOf = "parent"
android: layout_marginStart = "8dp" app: layout_constraintBottom_toBottomOf = "parent"
android: layout_marginBottom = "8dp" app: layout_constraintEnd_toEndOf = "parent"
android: layout_marginEnd = "8dp" />
Answer # 1
When I tried referring to the following, I got an error.
In the string setting, literals are not recommended and should be set in the resource.
strings.xml (app_name should match your app_name)
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