标签ID不适用于AndroidStudio中的一项活动

Question

In Android Studio I have the MainActivity.java and the activity_main , but the ID of the items doesn't work. How I can solve it?

Answer 1

Try changing your ids like this in the xml:

android:id="@+id/place"

android:id="@+id/view"

android:id="@+id/list"

New id will have @+ , when you're referring to an id which is already created, you will have just @ .

Answer 2

Try to set

tools:context=".MainActivity"

Instead of

tools:context=".httpclientdavid"

Because the context attribute should be the same as the activity...