attachToRoot: attaches the views to their parent (includes them in the parent hierarchy), so any touch event that the views recieve will also be transfered to parent view.
What is use of LayoutInflater in Android?
The LayoutInflater class is used to instantiate the contents of layout XML files into their corresponding View objects. In other words, it takes an XML file as input and builds the View objects from it.
What is getLayoutInflater?
getLayoutInflater() or Context#getSystemService to retrieve a standard LayoutInflater instance that is already hooked up to the current context and correctly configured for the device you are running on. … Note: This class is not thread-safe and a given instance should only be accessed by a single thread.
What does it mean to inflate a view?
When you write an XML layout, it will be inflated by the Android OS which basically means that it will be rendered by creating view object in memory. Let’s call that implicit inflation (the OS will inflate the view for you).
What is inflation Android?
What is an Inflater ? To summarize what the LayoutInflater Documentation says… A LayoutInflater is one of the Android System Services that is responsible for taking your XML files that define a layout, and converting them into View objects. The OS then uses these view objects to draw the screen.
What is onCreateOptionsMenu in android?
You use onCreateOptionsMenu() to specify the options menu for an activity. In this method, you can inflate your menu resource (defined in XML) into the Menu provided in the callback.
What is an ArrayAdapter in android?
ArrayAdapter is the most commonly used adapter in android. When you have a list of single type items which are stored in an array you can use ArrayAdapter. Likewise, if you have a list of phone numbers, names, or cities. ArrayAdapter has a layout with a single TextView.
What is an android view?
View is a basic building block of UI (User Interface) in android. A view is a small rectangular box that responds to user inputs. Eg: EditText, Button, CheckBox, etc. ViewGroup is an invisible container of other views (child views) and other ViewGroup. Eg: LinearLayout is a ViewGroup that can contain other views in it.
How do I find the ViewGroup?
How to use getRootView method in android.view.ViewGroup
- View view;(ViewGroup) view.getParent()
- Activity activity;(ViewGroup) activity.getWindow().getDecorView()
- Activity activity;(ViewGroup) activity.findViewById(id)
How do you get LayoutInflater in fragment?
The final way to get an instance of LayoutInflater, is from the method onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) in a Fragment. This just passes in the result of Activity. getLayoutInflater(), so everything above applies.
What is SetContentView?
SetContentView is used to fill the window with the UI provided from layout file incase of setContentView(R. layout. somae_file). Here layoutfile is inflated to view and added to the Activity context(Window).
How do you inflate a linear layout?
Inflate messages inside layout!
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In our addMsg function, we :
- get an instance of our chat_area which is a LinearLayout using findViewById()
- access our message view layout using getLayoutInflater(). inflate()
- Access our message TextView using msg_view. findViewById()
- Then add the message view using addView()
What is Android ViewGroup?
A ViewGroup is a special view that can contain other views. The ViewGroup is the base class for Layouts in android, like LinearLayout , RelativeLayout , FrameLayout etc. In other words, ViewGroup is generally used to define the layout in which views(widgets) will be set/arranged/listed on the android screen.