code: /*
   * Copyright 2014 Google Inc. All rights reserved.
   *
   * 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 org.physical_web.physicalweb;
  
  import android.annotation.SuppressLint;
  import android.app.Fragment;
  import android.os.Bundle;
  import android.view.LayoutInflater;
  import android.view.Menu;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.BaseAdapter;
  import android.widget.Button;
  import android.widget.ListView;
  import android.widget.TextView;
  
  import java.util.ArrayList;
  import java.util.List;
  
  
  /**
   * The fragment that displays info about the app.
   */
  public class BlockedFragment extends Fragment {
  
    private BlockedAdapter mAdapter;
  
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
      setHasOptionsMenu(true);
      getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
      View rootView = inflater.inflate(R.layout.fragment_blocked, container, false);
      ListView listView = (ListView) rootView.findViewById(android.R.id.list);
      mAdapter = new BlockedAdapter();
      listView.setAdapter(mAdapter);
      return rootView;
    }
  
    @Override
    public void onResume() {
      super.onResume();
      mAdapter.clear();
      for (String s : Utils.getBlockedHosts()) {
          mAdapter.addItem(s);
      }
      mAdapter.notifyDataSetChanged();
      getActivity().getActionBar().setTitle("Blocked URLs");
    }
  
    @Override
    public void onPrepareOptionsMenu(Menu menu) {
      super.onPrepareOptionsMenu(menu);
      Utils.hideAllMenuItems(menu);
    }
  
    private class BlockedAdapter extends BaseAdapter {
      private List<String> mListItems;
  
      BlockedAdapter() {
        mListItems = new ArrayList<>();
      }
  
      public void addItem(String pwPair) {
        mListItems.add(pwPair);
      }
  
      @Override
      public int getCount() {
        return mListItems.size();
      }
  
      @Override
      public String getItem(int i) {
        return mListItems.get(i);
      }
  
      @Override
      public long getItemId(int i) {
        return i;
      }
  
      private void setText(View view, int textViewId, String text) {
        ((TextView) view.findViewById(textViewId)).setText(text);
      }
  
      @SuppressLint("InflateParams")
      @Override
      public View getView(int i, View view, ViewGroup viewGroup) {
        // Get the list view item for the given position
        if (view == null) {
          view = getActivity().getLayoutInflater().inflate(R.layout.list_item_blocked,
                                                           viewGroup, false);
        }
        final String t = getItem(i);
        setText(view, R.id.blocked_host, getItem(i));
        ((Button) view.findViewById(R.id.delete_button)).setOnClickListener(
            new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            Utils.removeBlocked(t);
            Utils.saveBlocked(getActivity());
            clear();
            onResume();
            notifyDataSetChanged();
          }
        });
        return view;
      }
  
      public void clear() {
        mListItems.clear();
        notifyDataSetChanged();
      }
    }
  }
  
  