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March 25, 2023 14:05
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This extension method is a solution for a memory leak problem with recyclerviews.
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| /** | |
| * Set the adapter and call [clearReference] extension function in one call. | |
| * Use this extension if the current Fragment is going to be REPLACED. (When using fragmentTransaction.add is not necessary) the back stack. | |
| */ | |
| fun <VH : RecyclerView.ViewHolder> RecyclerView.setNullableAdapter( | |
| adapter: RecyclerView.Adapter<VH> | |
| ) { | |
| this.adapter = adapter | |
| this.clearReference() | |
| } | |
| /** | |
| * Remove the adapter after the view has been detached from window in order to prevent memory leaks. | |
| */ | |
| internal fun RecyclerView.clearReference() { | |
| addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener { | |
| override fun onViewAttachedToWindow(v: View?) { | |
| } | |
| override fun onViewDetachedFromWindow(v: View?) { | |
| this@clearReference.adapter = null | |
| } | |
| }) | |
| } | |
| // Usage in your fragment or activity -> | |
| viewDataBinding.myRv.setNullableAdapter(adapter) |
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