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MyListAdapter.java
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/
MyListAdapter.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.listview;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ListAdapter;
import android.widget.TextView;
import java.util.HashSet;
import java.util.Set;
import io.realm.OrderedRealmCollection;
import io.realm.RealmBaseAdapter;
import io.realm.examples.adapters.R;
import io.realm.examples.adapters.model.Item;
class MyListAdapter extends RealmBaseAdapter<Item> implements ListAdapter {
private static class ViewHolder {
TextView countText;
CheckBox deleteCheckBox;
}
private boolean inDeletionMode = false;
private Set<Integer> countersToDelete = new HashSet<Integer>();
MyListAdapter(OrderedRealmCollection<Item> realmResults) {
super(realmResults);
}
void enableDeletionMode(boolean enabled) {
inDeletionMode = enabled;
if (!enabled) {
countersToDelete.clear();
}
notifyDataSetChanged();
}
Set<Integer> getCountersToDelete() {
return countersToDelete;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row, parent, false);
viewHolder = new ViewHolder();
viewHolder.countText = (TextView) convertView.findViewById(R.id.textview);
viewHolder.deleteCheckBox = (CheckBox) convertView.findViewById(R.id.checkBox);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
if (adapterData != null) {
final Item item = adapterData.get(position);
viewHolder.countText.setText(item.getCountString());
if (inDeletionMode) {
viewHolder.deleteCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
countersToDelete.add(item.getId());
}
});
} else {
viewHolder.deleteCheckBox.setOnCheckedChangeListener(null);
}
viewHolder.deleteCheckBox.setChecked(countersToDelete.contains(item.getId()));
viewHolder.deleteCheckBox.setVisibility(inDeletionMode ? View.VISIBLE : View.GONE);
}
return convertView;
}
}