Android Open Source - multicast_test_tool Packet List Adapter

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2011 David Simmons/*from w w w  . ja v a  2 s  .c om*/
 * http://cafbit.com/entry/testing_multicast_support_on_android
 *
 * 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.cafbit.multicasttest;

import java.util.LinkedList;
import java.util.ListIterator;

import android.content.Context;
import android.database.DataSetObserver;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.TextView;

/**
 * This class manages a list of packets to be displayed
 * in the scrollable ListView.
 * @author simmons
 */
public class PacketListAdapter implements ListAdapter {
    
    private Context context;
    private LinkedList<Packet> packetList;
    private LinkedList<DataSetObserver> observers = new LinkedList<DataSetObserver>();
    
    public PacketListAdapter(Context context) {
        this.context = context;
        this.packetList = new LinkedList<Packet>();
    }

    public PacketListAdapter(Context context, LinkedList<Packet> packetList) {
        this.context = context;
        this.packetList = packetList;
    }

    public boolean areAllItemsEnabled() {
        return false;
    }

    public boolean isEnabled(int position) {
        if (position >= 0 && position < packetList.size()) {
            return true;
        } else {
            return false;
        }
    }

    public int getCount() {
        return packetList.size();
    }

    public Object getItem(int position) {
        return packetList.get(position);
    }

    public long getItemId(int position) {
        // TODO: ???
        return position;
    }

    public int getItemViewType(int arg0) {
        return 0;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View view = convertView;
        if (view == null) {
            LayoutInflater inflater =
                (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = inflater.inflate(R.layout.list_item, null);
        }
        Packet packet = packetList.get(position);
        if (packet != null) {
            TextView text1 = (TextView)view.findViewById(R.id.item_header);
            TextView text2 = (TextView)view.findViewById(R.id.item_desc);
            if (text1 != null) {
                if (packet.src == null || packet.dst == null) {
                    text1.setText("error");
                } else {
                    String dstHost;
                    if (packet.dst.isAnyLocalAddress()) {
                        dstHost = "";
                    } else {
                        dstHost = packet.dst.getHostAddress();
                    }
                    text1.setText(packet.src.getHostAddress()+":"+packet.srcPort+" -> "+dstHost+":"+packet.dstPort);
                }
            }
            if (text2 != null) {
                text2.setText(packet.description);
            }
        }
        return view;
    }

    public int getViewTypeCount() {
        return 1;
    }

    public boolean hasStableIds() {
        return false;
    }

    public boolean isEmpty() {
        return packetList.isEmpty();
    }

    public void registerDataSetObserver(DataSetObserver observer) {
        observers.add(observer);
    }

    public void unregisterDataSetObserver(DataSetObserver observer) {
        ListIterator<DataSetObserver> li = observers.listIterator();
        while (li.hasNext()) {
            if (li.next().equals(observer)) {
                li.remove();
            }
        }
    }

    public void addPacket(Packet packet) {
        packetList.add(packet);
        for (DataSetObserver observer : observers) {
            observer.onChanged();
        }
    }
    
    public void clear() {
        packetList.clear();
        for (DataSetObserver observer : observers) {
            observer.onChanged();
        }       
    }
    
}

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