Sunny Goyal
77acf12905
Linking header position to an empty entry in the recyclerView, instead of calculating the vertical scroll position. This allows the header to be in sync with the recyclerView scroll and item animations Other simplifications: > Moving top collapse handle out of header view (it doesn't scroll) > Removing background clipping logic from full-sheet > Moving tab bar inside the header view Bug: 196464142 Test: Verified on device Change-Id: Iae5a0ae9af7ce258e1b391b8e85c5c270fe56197
58 lines
2.0 KiB
Java
58 lines
2.0 KiB
Java
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.recyclerview;
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import android.view.ViewGroup;
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import androidx.annotation.IntDef;
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import androidx.recyclerview.widget.RecyclerView.ViewHolder;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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/**
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* Creates and populates views with data
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*
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* @param <T> A data model which is used to populate the {@link ViewHolder}.
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* @param <V> A subclass of {@link ViewHolder} which holds references to views.
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*/
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public interface ViewHolderBinder<T, V extends ViewHolder> {
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int POSITION_DEFAULT = 0;
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int POSITION_FIRST = 1 << 0;
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int POSITION_LAST = 1 << 1;
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@Retention(RetentionPolicy.SOURCE)
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@IntDef(value = {POSITION_DEFAULT, POSITION_FIRST, POSITION_LAST}, flag = true)
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@interface ListPosition {}
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/**
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* Creates a new view, and attach it to the parent {@link ViewGroup}. Then, populates UI
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* references in a {@link ViewHolder}.
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*/
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V newViewHolder(ViewGroup parent);
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/** Populate UI references in {@link ViewHolder} with data. */
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void bindViewHolder(V viewHolder, T data, @ListPosition int position);
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/**
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* Called when the view is recycled. Views are recycled in batches once they are sufficiently
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* far off screen that it is unlikely the user will scroll back to them soon. Optionally
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* override this to free expensive resources.
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*/
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default void unbindViewHolder(V viewHolder) {}
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}
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