/
MyRecyclerViewAdapter.java
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/
MyRecyclerViewAdapter.java
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/*
* Copyright 2016 Realm Inc.
*
* 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 io.realm.examples.adapters.ui.recyclerview;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import java.util.HashSet;
import java.util.Set;
import androidx.recyclerview.widget.RecyclerView;
import io.realm.OrderedRealmCollection;
import io.realm.RealmRecyclerViewAdapter;
import io.realm.examples.adapters.R;
import io.realm.examples.adapters.model.Item;
class MyRecyclerViewAdapter extends RealmRecyclerViewAdapter<Item, MyRecyclerViewAdapter.MyViewHolder> {
private boolean inDeletionMode = false;
private Set<Integer> countersToDelete = new HashSet<>();
MyRecyclerViewAdapter(OrderedRealmCollection<Item> data) {
super(data, true);
// Only set this if the model class has a primary key that is also a integer or long.
// In that case, {@code getItemId(int)} must also be overridden to return the key.
// See https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter.html#hasStableIds()
// See https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter.html#getItemId(int)
setHasStableIds(true);
}
void enableDeletionMode(boolean enabled) {
inDeletionMode = enabled;
if (!enabled) {
countersToDelete.clear();
}
notifyDataSetChanged();
}
Set<Integer> getCountersToDelete() {
return countersToDelete;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.row, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
final Item obj = getItem(position);
holder.data = obj;
final int itemId = obj.getId();
//noinspection ConstantConditions
holder.title.setText(obj.getCountString());
holder.deletedCheckBox.setChecked(countersToDelete.contains(itemId));
if (inDeletionMode) {
holder.deletedCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
countersToDelete.add(itemId);
} else {
countersToDelete.remove(itemId);
}
}
});
} else {
holder.deletedCheckBox.setOnCheckedChangeListener(null);
}
holder.deletedCheckBox.setVisibility(inDeletionMode ? View.VISIBLE : View.GONE);
}
@Override
public long getItemId(int index) {
//noinspection ConstantConditions
return getItem(index).getId();
}
class MyViewHolder extends RecyclerView.ViewHolder {
TextView title;
CheckBox deletedCheckBox;
public Item data;
MyViewHolder(View view) {
super(view);
title = view.findViewById(R.id.textview);
deletedCheckBox = view.findViewById(R.id.checkBox);
}
}
}