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ActionBarCompat-ListPopupMenu / src / com.example.android.actionbarcompat.listpopupmenu /

PopupListFragment.java

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