5/29/2023 0 Comments Android xml tools attribute![]() ![]() Take a simple tools:text, for example, some more image, convenient to further understand the tools:context Some people see will understand some, some people see the also don't know, I'll add a few words of explanation: 2.Sample The Light looks like.Only to show you what you see is what you get results. The Light (the other), then you see in visual layout manager o background control of what should be the Theme. Only ADT Layout Editor in your current Layout file set corresponding rendering context, show your current Layout in rendering the context is the activity name corresponds to the activity, if the activity in the manifest file set a Theme, then ADT Layout Editor will render your current Layout according to the Theme.Means that if you set the MainActivity set a Theme. Tools: context = "activity name" it won't be packaged into the apk. It's also where for example the attributes to suppress lint warnings are stored - as tools:ignore. We're using it for extra metadata in the layout. The android packaging tool knows to ignore it, so none of those attributes will be packaged into the APK. One more thing: The "tools" namespace is special. (Here's the full changeset which has more details on this)Īnd yeah, the link Nikolay listed above shows how the new configuration chooser looks and works ![]() We just want to give you a way to pick a designtime binding such that we can for example show the right theme you can change it at any time, just like you can change our listview and fragment bindings, etc. The layout itself can be used by multiple activities/fragments etc. ![]() The reason this is a tools: namespace attribute is that this is only a designtime mapping for use by the tool. In the future, we'll use this to drive additional features - such as rendering the action bar (which is associated with the activity), a place to add onClick handlers, etc. Right now, we're using it for one thing only: Picking the right theme to show for a layout (since the manifest file can register themes to use for an activity, and once we know the activity associated with the layout, we can pick the right theme to show for the layout). In the tool, we need to know about this mapping (which at runtime happens in the other direction an activity can call setContentView(layout) to display a layout) in order to drive certain features. It can of course be associated with more than one, but at least one. At runtime, a layout is always associated with an activity. That attribute is basically the persistence for the "Associated Activity" selection above the layout. ![]()
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