I have a custom class called NoteView that extends FrameLayout. Previously, I had just been using the stock LinearLayout and have an XML layout built already that I want to reuse by adding that entire hierarchy (with some other overlay views which is why I needed framelayout) to the NoteView.
The problem is I can't figure out how to inflate the XML and add it to the NoteView from within the NoteView Class. I can add it after initialization is complete, but I want to be able to be able to inflate that hierarchy and add it automatically when my NoteView is either instantiated or inflated from XML.
How can I populate my extended FrameLayout with a layout from XML by adding it from within the NoteView class itself?
Try LayoutInflater
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout myView = (LinearLayout) inflater.inflate(R.layout.my_layout, null);
frameLayout.addChild(myView);
Have a look at the documentation for LayoutInflater here: http://d.android.com/reference/android/view/LayoutInflater.html
Related
An example LayoutInflater code:
View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.,parent,false);
Can't understand the work of LayoutInflater in Android. Tried to read the official documentation of the android but, couldn't get the concept.
The main difference between findViewById and LayoutInflater is that findViewById is used to access existing views in a layout, while LayoutInflater is used to create a new view hierarchy from an XML layout file.
FindViewById is a method of the Activity class, while LayoutInflater is a separate class on it's own.
FindViewById is used to access a view in the current layout, this means lets us find Views from layouts written in XML and returns a reference to their Java objects, while LayoutInflater is used to create a new view hierarchy from an XML layout file, so this class is the responsible for “inflating” the layouts.
Hope it helps.
I need to generate a dynamic custom view in my application.
I need a custom view that is formed by an image button and 2 text views, above and bellow the button. There should also be an onClick listener on the image button, that will call a function when pressed.
By dynamic I mean those views will be created on demand, there should be a "dummy" structure from which I should be able to create as many custom views as I need.
How can I do that?
Just create the layout for your view with an xml and then use the layout inflater:
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View yourView = inflater.inflate(R.layout.view_layout, parent, false);
To access it's components then you use:
ImageButton imageButton = (ImageButton) yourView.findViewById(R.id.button);
You can start by creating a custom view class MyCustomView that extends the View class. Create a separate XML layout (the dummy structure) for the custom view and inflate it into the custom view constructor,
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.my_custom_view_layout, this, true);
You can add any listeners to the Button views that will make part of this compound view class. Take a look at this link for further understanding: http://www.vogella.com/tutorials/AndroidCustomViews/article.html
At the end, just treat this object as just a view and you place it on the interface wherever you want.
I'm going to create a new RelativeLayout with some Text and Image Views programatically and then add it to a parent layout. The question: is it possible to define that layout in XML and then just add it to the parent programatically? Would be a faster way..
Use inflation:
final LayoutInflater lyInflaterForPanel = (LayoutInflater) mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout lLayoutPanel = (LinearLayout) lyInflaterForPanel.inflate(
R.layout.my_row, null);
This has worked for me.
Yes, using LayoutInflater you will inflate your XML then add it to the parent..
check, What does LayoutInflater in Android do?
Use LayoutInflater class for that. It will covert your layout into a view and add it to parent.
I have created some xml layouts. Now I am creating a custom layout (in my java file) with some elements and want to add the previously created layout(xml layouts). How can I do that?
You can use LayoutInflater to inlate layouts. And add inflated view to your custom view by addView() method
For ex:
LayoutInflater mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
ViewGroup viewTobeLoaded = mInflater.inflate(R.layout.ilan_list_item, null);
yourView.addView(viewTobeLoaded);
Hope helps
Use <include> tag in your new layout. See docs here.
I would like to achieve this layout :
my main activity layout (main.xml);
(Please mouse right click the following image and view image)
I have made another ContentActivity (with content set to content_one.xml) which is supposed to be used as part (the right part) of the above layout:
I know I can inflate a layout by:
LinearLayout mainLayout = (LinearLayout) findViewById(R.id.main);
LayoutInflater inflater = (LayoutInflater)Home2.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View inflatedView = (View) inflater.inflate(R.layout.content_one, null);
mainLayout.addView(inflatedView);
I am wondering, besides inflate the content_one layout into main layout, is it possible to inflate a activity class instead of inflating a layout in android? If possible, how to do it?
You cant inflate an Activity as such. Consider using Fragments.
http://developer.android.com/guide/topics/fundamentals/fragments.html