AsyncLayoutInflater

class 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 Handlers 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

Public constructors

AsyncLayoutInflater(@NonNull context: Context)

Public methods

@UiThread fun inflate(
    @LayoutRes resid: Int, 
    @Nullable parent: ViewGroup?, 
    @NonNull callback: AsyncLayoutInflater.OnInflateFinishedListener
): Unit