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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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.example.android.actionbarcompat.listpopupmenu;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v7.widget.PopupMenu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
/**
* This ListFragment displays a list of cheeses, with a clickable view on each item whichs displays
* a {@link android.support.v7.widget.PopupMenu PopupMenu} when clicked, allowing the user to
* remove the item from the list.
*/
public class PopupListFragment extends ListFragment implements View.OnClickListener {
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// We want to allow modifications to the list so copy the placeholder data array into an ArrayList
ArrayList<String> items = new ArrayList<String>();
for (int i = 0, z = Cheeses.CHEESES.length ; i < z ; i++) {
items.add(Cheeses.CHEESES[i]);
}
// Set the ListAdapter
setListAdapter(new PopupAdapter(items));
}
@Override
public void onListItemClick(ListView listView, View v, int position, long id) {
String item = (String) listView.getItemAtPosition(position);
// Show a toast if the user clicks on an item
Toast.makeText(getActivity(), "Item Clicked: " + item, Toast.LENGTH_SHORT).show();
}
@Override
public void onClick(final View view) {
// We need to post a Runnable to show the popup to make sure that the PopupMenu is
// correctly positioned. The reason being that the view may change position before the
// PopupMenu is shown.
view.post(new Runnable() {
@Override
public void run() {
showPopupMenu(view);
}
});
}
// BEGIN_INCLUDE(show_popup)
private void showPopupMenu(View view) {
final PopupAdapter adapter = (PopupAdapter) getListAdapter();
// Retrieve the clicked item from view's tag
final String item = (String) view.getTag();
// Create a PopupMenu, giving it the clicked view for an anchor
PopupMenu popup = new PopupMenu(getActivity(), view);
// Inflate our menu resource into the PopupMenu's Menu
popup.getMenuInflater().inflate(R.menu.popup, popup.getMenu());
// Set a listener so we are notified if a menu item is clicked
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.menu_remove:
// Remove the item from the adapter
adapter.remove(item);
return true;
}
return false;
}
});
// Finally show the PopupMenu
popup.show();
}
// END_INCLUDE(show_popup)
/**
* A simple array adapter that creates a list of cheeses.
*/
class PopupAdapter extends ArrayAdapter<String> {
PopupAdapter(ArrayList<String> items) {
super(getActivity(), R.layout.list_item, android.R.id.text1, items);
}
@Override
public View getView(int position, View convertView, ViewGroup container) {
// Let ArrayAdapter inflate the layout and set the text
View view = super.getView(position, convertView, container);
// BEGIN_INCLUDE(button_popup)
// Retrieve the popup button from the inflated view
View popupButton = view.findViewById(R.id.button_popup);
// Set the item as the button's tag so it can be retrieved later
popupButton.setTag(getItem(position));
// Set the fragment instance as the OnClickListener
popupButton.setOnClickListener(PopupListFragment.this);
// END_INCLUDE(button_popup)
// Finally return the view to be displayed
return view;
}
}
}
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