ConcatAdapterを深掘る

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   WFSҎ্͕ඞཁͰ͢ val headerAdapter = HeaderAdapter() val itemAdapter = ItemAdapter() val concatAdapter = ConcatAdapter(headerAdapter, itemAdapter) binding.recyclerView.adapter = concatAdapter
5. $PODBU"EBQUFSͱ͸ʁ RecyclerView ConcatAdapter HeaderAdapter ItemAdapter γʔέϯγϟϧ
6. $PODBU"EBQUFSͱ͸ʁ RecyclerView ConcatAdapter HeaderAdapter ItemAdapter γʔέϯγϟϧ
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9. 3FDZDMFS7JF͆ʹ఻͑ΔલʹPGGTFUΛܭࢉ͢Δ @Override public void onItemRangeChanged(@NonNull NestedAdapterWrapper nestedAdapterWrapper, int positionStart, int itemCount) { final int offset = countItemsBefore(nestedAdapterWrapper); mConcatAdapter.notifyItemRangeChanged( positionStart + offset, itemCount ); }
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    1PPMΛڞ༗͢Δʣ public final boolean isolateViewTypes
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    *%Λ࣋ͭ͜ͱΛڧ੍͠ɺ"EBQUFSؒͰ*%ϓʔϧΛڞ༗͢Δ public final ConcatAdapter.Config.StableIdMode stableIdMode
12. $PODBU"EBQUFS͕ߦ͍ͬͯΔ੍ޚ public ConcatAdapter( @NonNull Config config, @NonNull List<? extends Adapter<? extends ViewHolder>> adapters) { mController = new ConcatAdapterController(this, config); for (Adapter<? extends ViewHolder> adapter : adapters) { addAdapter(adapter); } super.setHasStableIds(mController.hasStableIds()); } public boolean hasStableIds() { return mStableIdMode != NO_STABLE_IDS; }
13. $PODBU"EBQUFS͕ߦ͍ͬͯΔ੍ޚ ConcatAdapterController(ConcatAdapter concatAdapter, ConcatAdapter.Config config) { mConcatAdapter = concatAdapter; // setup view type handling if (config.isolateViewTypes) { mViewTypeStorage = new ViewTypeStorage.IsolatedViewTypeStorage(); } else { mViewTypeStorage = new ViewTypeStorage.SharedIdRangeViewTypeStorage(); } // setup stable id handling mStableIdMode = config.stableIdMode; if (config.stableIdMode == NO_STABLE_IDS) { mStableIdStorage = new StableIdStorage.NoStableIdStorage(); } else if (config.stableIdMode == ISOLATED_STABLE_IDS) { mStableIdStorage = new StableIdStorage.IsolatedStableIdStorage(); } else if (config.stableIdMode == SHARED_STABLE_IDS) { mStableIdStorage = new StableIdStorage.SharedPoolStableIdStorage(); } else { throw new IllegalArgumentException("unknown stable id mode"); } }
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