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AlreadyExpandedGroupsExpandableExampleAdapter.java
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AlreadyExpandedGroupsExpandableExampleAdapter.java
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/*
* Copyright (C) 2015 Haruki Hasegawa
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.h6ah4i.android.example.advrecyclerview.demo_e_already_expanded;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;
import com.h6ah4i.android.example.advrecyclerview.R;
import com.h6ah4i.android.example.advrecyclerview.common.data.AbstractAddRemoveExpandableDataProvider;
import com.h6ah4i.android.example.advrecyclerview.common.widget.ExpandableItemIndicator;
import com.h6ah4i.android.widget.advrecyclerview.expandable.ExpandableItemState;
import com.h6ah4i.android.widget.advrecyclerview.expandable.RecyclerViewExpandableItemManager;
import com.h6ah4i.android.widget.advrecyclerview.utils.AbstractExpandableItemAdapter;
import com.h6ah4i.android.widget.advrecyclerview.utils.AbstractExpandableItemViewHolder;
import androidx.annotation.NonNull;
class AlreadyExpandedGroupsExpandableExampleAdapter
extends AbstractExpandableItemAdapter<AlreadyExpandedGroupsExpandableExampleAdapter.MyGroupViewHolder, AlreadyExpandedGroupsExpandableExampleAdapter.MyChildViewHolder> {
private static final String TAG = "MyExpandableItemAdapter";
private AbstractAddRemoveExpandableDataProvider mProvider;
private RecyclerViewExpandableItemManager mExpandableItemManager;
public static abstract class MyBaseViewHolder extends AbstractExpandableItemViewHolder {
public FrameLayout mContainer;
public TextView mTextView;
public MyBaseViewHolder(View v) {
super(v);
mContainer = v.findViewById(R.id.container);
mTextView = v.findViewById(android.R.id.text1);
}
}
public static class MyGroupViewHolder extends MyBaseViewHolder {
public ExpandableItemIndicator mIndicator;
public MyGroupViewHolder(View v) {
super(v);
mIndicator = v.findViewById(R.id.indicator);
}
}
public static class MyChildViewHolder extends MyBaseViewHolder {
public MyChildViewHolder(View v) {
super(v);
}
}
public AlreadyExpandedGroupsExpandableExampleAdapter(
RecyclerViewExpandableItemManager expandableItemManager,
AbstractAddRemoveExpandableDataProvider dataProvider) {
mExpandableItemManager = expandableItemManager;
mProvider = dataProvider;
// ExpandableItemAdapter requires stable ID, and also
// have to implement the getGroupItemId()/getChildItemId() methods appropriately.
setHasStableIds(true);
}
@Override
public int getGroupCount() {
return mProvider.getGroupCount();
}
@Override
public int getChildCount(int groupPosition) {
return mProvider.getChildCount(groupPosition);
}
@Override
public long getGroupId(int groupPosition) {
return mProvider.getGroupItem(groupPosition).getGroupId();
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return mProvider.getChildItem(groupPosition, childPosition).getChildId();
}
@Override
public int getGroupItemViewType(int groupPosition) {
return 0;
}
@Override
public int getChildItemViewType(int groupPosition, int childPosition) {
return 0;
}
@Override
@NonNull
public MyGroupViewHolder onCreateGroupViewHolder(@NonNull ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View v = inflater.inflate(R.layout.list_group_item, parent, false);
return new MyGroupViewHolder(v);
}
@Override
@NonNull
public MyChildViewHolder onCreateChildViewHolder(@NonNull ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View v = inflater.inflate(R.layout.list_item, parent, false);
return new MyChildViewHolder(v);
}
@Override
public void onBindGroupViewHolder(@NonNull MyGroupViewHolder holder, int groupPosition, int viewType) {
// child item
final AbstractAddRemoveExpandableDataProvider.BaseData item = mProvider.getGroupItem(groupPosition);
// set text
holder.mTextView.setText(item.getText());
// mark as clickable
holder.itemView.setClickable(true);
// set background resource (target view ID: container)
final ExpandableItemState expandState = holder.getExpandState();
if (expandState.isUpdated()) {
int bgResId;
boolean animateIndicator = expandState.hasExpandedStateChanged();
if (expandState.isExpanded()) {
bgResId = R.drawable.bg_group_item_expanded_state;
} else {
bgResId = R.drawable.bg_group_item_normal_state;
}
holder.mContainer.setBackgroundResource(bgResId);
holder.mIndicator.setExpandedState(expandState.isExpanded(), animateIndicator);
}
}
@Override
public void onBindChildViewHolder(@NonNull MyChildViewHolder holder, int groupPosition, int childPosition, int viewType) {
// group item
final AbstractAddRemoveExpandableDataProvider.ChildData item = mProvider.getChildItem(groupPosition, childPosition);
// set text
holder.mTextView.setText(item.getText());
// set background resource (target view ID: container)
int bgResId;
bgResId = R.drawable.bg_item_normal_state;
holder.mContainer.setBackgroundResource(bgResId);
}
@Override
public boolean onCheckCanExpandOrCollapseGroup(@NonNull MyGroupViewHolder holder, int groupPosition, int x, int y, boolean expand) {
// check is enabled
return holder.itemView.isEnabled() && holder.itemView.isClickable();
}
@Override
public boolean getInitialGroupExpandedState(int groupPosition) {
// NOTE:
// This method can also be used to control initial state of group items.
// Make sure to call `setDefaultGroupsExpandedState(false)` to take effect.
return false;
}
// NOTE: This method is called from Fragment
public void addGroupAndChildItemsBottom(int groupCount, int childCount) {
int groupPosition = mProvider.getGroupCount();
for (int i = 0; i < groupCount; i++) {
// add group
mProvider.addGroupItem(groupPosition + i);
// add children
for (int j = 0; j < childCount; j++) {
mProvider.addChildItem(groupPosition + i, j);
}
}
mExpandableItemManager.notifyGroupItemRangeInserted(groupPosition, groupCount);
}
// NOTE: This method is called from Fragment
public void removeGroupItemsBottom(int count) {
int groupCount = mProvider.getGroupCount();
count = Math.min(count, groupCount);
int groupPosition = groupCount - count;
for (int i = 0; i < count; i++) {
mProvider.removeGroupItem(groupPosition);
}
mExpandableItemManager.notifyGroupItemRangeRemoved(groupPosition, count);
}
// NOTE: This method is called from Fragment
public void clearGroupItems() {
int groupCount = mProvider.getGroupCount();
mProvider.clear();
mExpandableItemManager.notifyGroupItemRangeRemoved(0, groupCount);
}
}