AsyncLayoutInflater
class AsyncLayoutInflater
kotlin.Any | |
↳ | androidx.asynclayoutinflater.view.AsyncLayoutInflater |
Helper class for inflating layouts asynchronously. To use, construct an instance of AsyncLayoutInflater
on the UI thread and call inflate(int, ViewGroup, OnInflateFinishedListener)
. The OnInflateFinishedListener
will be invoked on the UI thread when the inflate request has completed.
This is intended for parts of the UI that are created lazily or in response to user interactions. This allows the UI thread to continue to be responsive & animate while the relatively heavy inflate is being performed.
For a layout to be inflated asynchronously it needs to have a parent whose ViewGroup#generateLayoutParams(AttributeSet)
is thread-safe and all the Views being constructed as part of inflation must not create any Handler
s or otherwise call Looper#myLooper()
. If the layout that is trying to be inflated cannot be constructed asynchronously for whatever reason, AsyncLayoutInflater
will automatically fall back to inflating on the UI thread.
NOTE that the inflated View hierarchy is NOT added to the parent. It is equivalent to calling LayoutInflater#inflate(int, ViewGroup, boolean)
with attachToRoot set to false. Callers will likely want to call ViewGroup#addView(View)
in the OnInflateFinishedListener
callback at a minimum.
This inflater does not support setting a LayoutInflater.Factory
nor LayoutInflater.Factory2
. Similarly it does not support inflating layouts that contain fragments.
Summary
Nested classes | |
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abstract |
Public constructors | |
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Public methods | |
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Unit |
inflate(@LayoutRes resid: Int, @Nullable parent: ViewGroup?, @NonNull callback: AsyncLayoutInflater.OnInflateFinishedListener) |
Public constructors
<init>
AsyncLayoutInflater(@NonNull context: Context)
Public methods
inflate
@UiThread fun inflate(
@LayoutRes resid: Int,
@Nullable parent: ViewGroup?,
@NonNull callback: AsyncLayoutInflater.OnInflateFinishedListener
): Unit