A summary of methods for acquiring Layoutinflater objects in Android development _android

This article is an example of the Android development approach to acquiring Layoutinflater objects. Share to everyone for your reference, specific as follows:

When you write an Android program, you sometimes write custom view and use the Inflater object to parse the layout file into a view. The main purpose of this paper is to summarize the methods of acquiring Layoutinflater objects.

1, if can obtain the context object, may have the following several methods:

Layoutinflater Inflater = (layoutinflater) context.getsystemservice (context.layout_inflater_service);
View child = inflater.inflate (R.layout.child, NULL);

Or:

Layoutinflater Inflater = layoutinflater.from (context);
View child = inflater.inflate (R.layout.child, NULL);

2. In an activity, you can have the following methods:

View child = Getlayoutinflater (). Inflate (R.layout.child, item, FALSE);

Or:

View view;
Layoutinflater Inflater = (layoutinflater)  getcontext (). Getsystemservice (Context.layout_inflater_service);
View = Inflater.inflate (r.layout.mylayout, NULL);

Method 1 and Method 2 are actually used for context (). Getsystemservice ()

3. Static method of using view:

View view=view.inflate (context, r.layout.child, NULL)

Inflate realize the source code as follows:

/**
 * Inflate a view from XML resource. This convenience method wraps the {@link
 * Layoutinflater} class, which provides a full range of options for view INFL ation.
 * * @param context of the context
 object for your activity or application
 . * @param resource The resource ID to inflate
 * @param root A View group that would be the parent. Used to properly inflate the
 * layout_* parameters.
 * @see layoutinflater
 *
/public static View inflate (context, int resource, ViewGroup root) {
  Layout Inflater factory = Layoutinflater.from (context);
  Return Factory.inflate (resource, root);
}

Layoutinflater.from (context) is actually the packaging of Method 1, can refer to the following source code:

/**
 * Obtains the layoutinflater from the given context.
 * * Public
static Layoutinflater from (context context) {
  Layoutinflater layoutinflater =
      (layoutinflater) Context.getsystemservice (context.layout_inflater_service);
  if (Layoutinflater = = null) {
    throw new Assertionerror ("Layoutinflater not Found.");
  }
  return layoutinflater;
}

More interested readers of Android-related content can view this site's topics: "Introduction to Android Development and advanced Tutorials", "Summary of Android Control usage", "Android SMS and phone operation Tips" and "Android Multimedia operating Tips Summary" (audio, video, Recording, etc.) "

I hope this article will help you with the Android program.