The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...
/*
* Copyright (C) 2011 The Android开源工程
*
* 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.wifidirect;
import android.app.ListFragment;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pManager.PeerListListener;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
/**
* A ListFragment that displays available peers on discovery and requests the
* parent activity to handle user interaction events
*/
public class DeviceListFragment extends ListFragment implements PeerListListener {
private List<WifiP2pDevice> peers = new ArrayList<WifiP2pDevice>();
ProgressDialog progressDialog = null;
View mContentView = null;
private WifiP2pDevice device;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
this.setListAdapter(new WiFiPeerListAdapter(getActivity(), R.layout.row_devices, peers));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mContentView = inflater.inflate(R.layout.device_list, null);
return mContentView;
}
/**
* @return this device
*/
public WifiP2pDevice getDevice() {
return device;
}
private static String getDeviceStatus(int deviceStatus) {
Log.d(WiFiDirectActivity.TAG, "Peer status :" + deviceStatus);
switch (deviceStatus) {
case WifiP2pDevice.AVAILABLE:
return "Available";
case WifiP2pDevice.INVITED:
return "Invited";
case WifiP2pDevice.CONNECTED:
return "Connected";
case WifiP2pDevice.FAILED:
return "Failed";
case WifiP2pDevice.UNAVAILABLE:
return "Unavailable";
default:
return "Unknown";
}
}
/**
* Initiate a connection with the peer.
*/
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
WifiP2pDevice device = (WifiP2pDevice) getListAdapter().getItem(position);
((DeviceActionListener) getActivity()).showDetails(device);
}
/**
* Array adapter for ListFragment that maintains WifiP2pDevice list.
*/
private class WiFiPeerListAdapter extends ArrayAdapter<WifiP2pDevice> {
private List<WifiP2pDevice> items;
/**
* @param context
* @param textViewResourceId
* @param objects
*/
public WiFiPeerListAdapter(Context context, int textViewResourceId,
List<WifiP2pDevice> objects) {
super(context, textViewResourceId, objects);
items = objects;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) getActivity().getSystemService(
Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row_devices, null);
}
WifiP2pDevice device = items.get(position);
if (device != null) {
TextView top = (TextView) v.findViewById(R.id.device_name);
TextView bottom = (TextView) v.findViewById(R.id.device_details);
if (top != null) {
top.setText(device.deviceName);
}
if (bottom != null) {
bottom.setText(getDeviceStatus(device.status));
}
}
return v;
}
}
/**
* Update UI for this device.
*
* @param device WifiP2pDevice object
*/
public void updateThisDevice(WifiP2pDevice device) {
this.device = device;
TextView view = (TextView) mContentView.findViewById(R.id.my_name);
view.setText(device.deviceName);
view = (TextView) mContentView.findViewById(R.id.my_status);
view.setText(getDeviceStatus(device.status));
}
@Override
public void onPeersAvailable(WifiP2pDeviceList peerList) {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
peers.clear();
peers.addAll(peerList.getDeviceList());
((WiFiPeerListAdapter) getListAdapter()).notifyDataSetChanged();
if (peers.size() == 0) {
Log.d(WiFiDirectActivity.TAG, "No devices found");
return;
}
}
public void clearPeers() {
peers.clear();
((WiFiPeerListAdapter) getListAdapter()).notifyDataSetChanged();
}
/**
*
*/
public void onInitiateDiscovery() {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
}
progressDialog = ProgressDialog.show(getActivity(), "Press back to cancel", "finding peers", true,
true, new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
}
});
}
/**
* An interface-callback for the activity to listen to fragment interaction
* events.
*/
public interface DeviceActionListener {
void showDetails(WifiP2pDevice device);
void cancelDisconnect();
void connect(WifiP2pConfig config);
void disconnect();
}
}