21 android2 updated
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The document provides instructions on installing the Android SDK and setting up a development environment in Netbeans or Eclipse. It describes the basic building blocks of an Android application including activities, intents, services, and content providers. It also covers creating user interfaces with views and view hierarchies, handling click events, and building a simple form layout with widgets like text fields, buttons, and radio buttons.
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21 android2 updated
- 21. Layouts
Notes de l'éditeur
- @+id/foo means you are creating an id named foo in the namespace of your application. You can refer to it using @id/foo. @android:id/foo means you are referring to an id defined in the android namespace. This namespace is the namespace of the framework The plus-symbol (+) means that this is a new resource name that must be created and added to our resources (in the R.java file).
- Place radio group inside say a LinearLayout