Android WiFi Direct - client/server - ECONNREFUSED（连接被拒绝）更新
Android WiFi Direct - client/server - ECONNREFUSED (Connection refused) UPDATE
我的 Android client/server 应用程序有问题。我想通过 WiFi Direct 连接设备并发送一些媒体文件。
我为客户端和服务器创建了一个 Activity 和服务。代码如下。
服务器Activity:
import java.util.ArrayList;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.WpsInfo;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pInfo;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.ActionListener;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.PeerListListener;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class ServerActivity extends Activity {
private WifiP2pManager wifiManager;
private Channel wifichannel;
private BroadcastReceiver wifiServerReceiver;
private IntentFilter wifiServerReceiverIntentFilter;
private WifiP2pConfig config;
private String deviceName;
private Intent intent;
PeerListListener myPeerListListener;
ArrayList<WifiP2pDevice> peers = new ArrayList<WifiP2pDevice>();
WifiP2pDeviceList peerList;
TextView text;
EditText et2;
Button button1;
ListView listView;
ArrayAdapter<String> BTArrayAdapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.server_activity);
// Block auto opening keyboard
this.getWindow()
.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
BTArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
listView = (ListView) findViewById(R.id.listView1);
listView.setAdapter(BTArrayAdapter);
wifiManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
wifichannel = wifiManager.initialize(this, getMainLooper(), null);
wifiServerReceiverIntentFilter = new IntentFilter();
;
wifiServerReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
wifiServerReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
wifiServerReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
wifiServerReceiverIntentFilter
.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
intent = null;
registerReceiver(wifiServerReceiver, wifiServerReceiverIntentFilter);
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
wifiManager.discoverPeers(wifichannel, null);
wifiManager.requestPeers(wifichannel, new PeerListListener() {
@Override
public void onPeersAvailable(WifiP2pDeviceList peerList) {
peers.clear();
peers.addAll(peerList.getDeviceList());
}
});
for (int i = 0; i < peers.size(); i++) {
WifiP2pDevice device = peers.get(i);
deviceName = device.deviceName;
config = new WifiP2pConfig();
config.deviceAddress = device.deviceAddress;
config.wps.setup = WpsInfo.PBC;
wifiManager.connect(wifichannel, config, new ActionListener() {
@Override
public void onSuccess() {
Toast.makeText(
getApplicationContext(),
"Połączono z: " + deviceName + "\n Mac: "
+ config.deviceAddress, Toast.LENGTH_SHORT).show();
}
@Override
public void onFailure(int reason) {
Toast.makeText(getApplicationContext(), "Nie udało się połączyć",
Toast.LENGTH_SHORT).show();
}
});
}
wifiManager.requestConnectionInfo(wifichannel,
new WifiP2pManager.ConnectionInfoListener() {
@Override
public void onConnectionInfoAvailable(final WifiP2pInfo info) {
// TODO Auto-generated method stub
String groupOwnerAddress = info.groupOwnerAddress.getHostAddress();
Toast.makeText(getApplicationContext(),
"GroupOwnAddress: " + groupOwnerAddress, Toast.LENGTH_SHORT)
.show();
}
});
StartServer(null);
}
});
}
public void StartServer(View v) {
// Construct our Intent specifying the Service
intent = new Intent(this, ServerService.class);
startService(intent);
}
}
服务器服务：
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.widget.Toast;
public class ServerService extends IntentService {
Handler mHandler;
private int port = 2178;
ServerSocket welcomeSocket = null;
Socket socket = null;
public ServerService() {
super("ServerService");
mHandler = new Handler();
}
@Override
protected void onHandleIntent(Intent intent) {
try {
mHandler.post(new DisplayToast(this, "Creating ServerSocket.."));
welcomeSocket = new ServerSocket(port);
welcomeSocket.setReuseAddress(true);
mHandler.post(new DisplayToast(this, "Waiting for connection on port: "
+ welcomeSocket.getLocalPort()));
socket = welcomeSocket.accept();
// while(true && flag){
// socket = welcomeSocket.accept();
mHandler.post(new DisplayToast(this, "Coneccted!"));
// }
mHandler.post(new DisplayToast(this, "Succes!"));
} catch (IOException e) {
mHandler.post(new DisplayToast(this, "IOException"));
} catch (Exception e) {
mHandler.post(new DisplayToast(this, "Exception"));
}
mHandler.post(new DisplayToast(this, "ServerService"));
}
/*
public void onDestroy() {
try {
welcomeSocket.close();
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
stopSelf();
}*/
}
class DisplayToast2 implements Runnable {
private final Context mContext;
String mText;
public DisplayToast2(Context mContext, String text) {
this.mContext = mContext;
mText = text;
}
public void run() {
Toast.makeText(mContext, mText, Toast.LENGTH_SHORT).show();
}
}
客户Activity:
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pInfo;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;
public class ClientActivity extends Activity {
Button button;
private WifiP2pManager wifiManager;
private Channel wifichannel;
private BroadcastReceiver wifiClientReceiver;
private IntentFilter wifiClientReceiverIntentFilter;
private WifiP2pInfo wifiInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.client_activity);
// Block auto opening keyboard
this.getWindow()
.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
wifiManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
wifichannel = wifiManager.initialize(this, getMainLooper(), null);
wifiClientReceiver = new WiFiClientBroadcastReceiver(wifiManager, wifichannel, this);
wifiClientReceiverIntentFilter = new IntentFilter();
;
wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
wifiClientReceiverIntentFilter
.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
wifiInfo = null;
registerReceiver(wifiClientReceiver, wifiClientReceiverIntentFilter);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
StartClient(null);
}
});
}
public void setNetworkToReadyState(boolean status, WifiP2pInfo info, WifiP2pDevice device) {
wifiInfo = info;
// targetDevice = device;
// connectedAndReadyToSendFile = status;
}
public void StartClient(View v) {
Intent intent = new Intent(this, ClientService.class);
intent.putExtra("wifiInfo", wifiInfo);
if (wifiInfo == null) {
Toast.makeText(this, "WifiInfo = null!", Toast.LENGTH_SHORT).show();
}
startService(intent);
}
}
客户端服务：
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.p2p.WifiP2pInfo;
import android.os.Handler;
import android.widget.Toast;
public class ClientService extends IntentService {
Handler mHandler;
private WifiP2pInfo wifiInfo;
private int port = 2178;
Socket clientSocket = null;
OutputStream os = null;
public ClientService() {
super("ClientService");
mHandler = new Handler();
}
@Override
protected void onHandleIntent(Intent intent) {
wifiInfo = (WifiP2pInfo) intent.getExtras().get("wifiInfo");
InetAddress targetIP = wifiInfo.groupOwnerAddress;
clientSocket = new Socket();
if(wifiInfo.isGroupOwner)
{
try {
mHandler.post(new DisplayToast(this, "Try to connect: /N IP: " + targetIP + "/nPort: " +port));
clientSocket.connect(new InetSocketAddress(targetIP, port));
mHandler.post(new DisplayToast(this, "Connected!"));
//os = clientSocket.getOutputStream();
} catch (IOException e) {
mHandler.post(new DisplayToast(this, "serwer IOException: " + e.getMessage()));
} catch (Exception e) {
mHandler.post(new DisplayToast(this, "serwer Exception"));
}
}else{
mHandler.post(new DisplayToast(this, "Group owner = " + wifiInfo.isGroupOwner));
}
}
/*
public void onDestroy()
{
try {
os.close();
clientSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
stopSelf();
}*/
}
class DisplayToast implements Runnable {
private final Context mContext;
String mText;
public DisplayToast(Context mContext, String text) {
this.mContext = mContext;
mText = text;
}
public void run() {
Toast.makeText(mContext, mText, Toast.LENGTH_SHORT).show();
}
}
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".AppModeSelection"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".ServerService"
android:exported="false" />
<service
android:name=".ClientService"
android:exported="false" />
<activity android:name=".ServerActivity" >
</activity>
<activity android:name=".ClientActivity" >
</activity>
</application>
</manifest>
我正在使用两部支持 WiFi Direct 的手机（Samsung GT-I9505 Android 4.4.2 和 Samsung GT-I8190N Adroid 4.1.2）。首先，我关闭了所有连接（BT、WIFI），然后通过 WiFi Direct 连接。 GT-I9505 是服务器，另一台是客户端。建立连接时出现 IOException 错误：
IOException：无法连接到/192.168.49.1（端口 2178）：连接失败：ECONNREFUSED（连接被拒绝）
我尝试使用很多其他 Pors，但没有任何效果。我做错了什么？
提前感谢您的帮助！
更新：
我注意到，当我直接断开 WiFi 连接并再次连接时，但在其他方向上它可以工作，但只是暂时的。
你的代码的主要问题是你确实需要让它成为事件驱动的，在当前状态下我很惊讶它甚至真的做了任何事情。
因此，请尝试将其制作成如下所示：
1. 开始 Discovering peers，一旦你得到 Peers Changed 事件，然后做 requestPeers
2. 如果您需要一些侦听器等在另一端为您做好准备，那么您可能会通过广告服务来识别这些设备，因此接下来开始发现服务。
3. 发现服务后，启动 5 秒计时器等待任何其他服务，在每次发现服务后重置计时器，一旦计时器最终达到 运行 不间断的 5 秒，您可能已经发现了所有可用的服务那时候。
4. Select 一项服务并连接到该设备（你真的不能有多个连接）。
5. 获得已连接事件后，使用 requestConnectionInfo 获取连接信息。
那么请记住，在开始之前，您需要创建本地服务，以便对方可以看到它。然后，如果您的设备被选为组所有者，您可以继续播放广告，让更多客户端连接到您。但是如果你被选为Client，那么你就不能有传入的连接，所以你应该去掉广告。
我的 Android client/server 应用程序有问题。我想通过 WiFi Direct 连接设备并发送一些媒体文件。
我为客户端和服务器创建了一个 Activity 和服务。代码如下。
服务器Activity:
import java.util.ArrayList;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.WpsInfo;
import android.net.wifi.p2p.WifiP2pConfig;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pDeviceList;
import android.net.wifi.p2p.WifiP2pInfo;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.ActionListener;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.net.wifi.p2p.WifiP2pManager.PeerListListener;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class ServerActivity extends Activity {
private WifiP2pManager wifiManager;
private Channel wifichannel;
private BroadcastReceiver wifiServerReceiver;
private IntentFilter wifiServerReceiverIntentFilter;
private WifiP2pConfig config;
private String deviceName;
private Intent intent;
PeerListListener myPeerListListener;
ArrayList<WifiP2pDevice> peers = new ArrayList<WifiP2pDevice>();
WifiP2pDeviceList peerList;
TextView text;
EditText et2;
Button button1;
ListView listView;
ArrayAdapter<String> BTArrayAdapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.server_activity);
// Block auto opening keyboard
this.getWindow()
.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
BTArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);
listView = (ListView) findViewById(R.id.listView1);
listView.setAdapter(BTArrayAdapter);
wifiManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
wifichannel = wifiManager.initialize(this, getMainLooper(), null);
wifiServerReceiverIntentFilter = new IntentFilter();
;
wifiServerReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
wifiServerReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
wifiServerReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
wifiServerReceiverIntentFilter
.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
intent = null;
registerReceiver(wifiServerReceiver, wifiServerReceiverIntentFilter);
button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
wifiManager.discoverPeers(wifichannel, null);
wifiManager.requestPeers(wifichannel, new PeerListListener() {
@Override
public void onPeersAvailable(WifiP2pDeviceList peerList) {
peers.clear();
peers.addAll(peerList.getDeviceList());
}
});
for (int i = 0; i < peers.size(); i++) {
WifiP2pDevice device = peers.get(i);
deviceName = device.deviceName;
config = new WifiP2pConfig();
config.deviceAddress = device.deviceAddress;
config.wps.setup = WpsInfo.PBC;
wifiManager.connect(wifichannel, config, new ActionListener() {
@Override
public void onSuccess() {
Toast.makeText(
getApplicationContext(),
"Połączono z: " + deviceName + "\n Mac: "
+ config.deviceAddress, Toast.LENGTH_SHORT).show();
}
@Override
public void onFailure(int reason) {
Toast.makeText(getApplicationContext(), "Nie udało się połączyć",
Toast.LENGTH_SHORT).show();
}
});
}
wifiManager.requestConnectionInfo(wifichannel,
new WifiP2pManager.ConnectionInfoListener() {
@Override
public void onConnectionInfoAvailable(final WifiP2pInfo info) {
// TODO Auto-generated method stub
String groupOwnerAddress = info.groupOwnerAddress.getHostAddress();
Toast.makeText(getApplicationContext(),
"GroupOwnAddress: " + groupOwnerAddress, Toast.LENGTH_SHORT)
.show();
}
});
StartServer(null);
}
});
}
public void StartServer(View v) {
// Construct our Intent specifying the Service
intent = new Intent(this, ServerService.class);
startService(intent);
}
}
服务器服务：
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.widget.Toast;
public class ServerService extends IntentService {
Handler mHandler;
private int port = 2178;
ServerSocket welcomeSocket = null;
Socket socket = null;
public ServerService() {
super("ServerService");
mHandler = new Handler();
}
@Override
protected void onHandleIntent(Intent intent) {
try {
mHandler.post(new DisplayToast(this, "Creating ServerSocket.."));
welcomeSocket = new ServerSocket(port);
welcomeSocket.setReuseAddress(true);
mHandler.post(new DisplayToast(this, "Waiting for connection on port: "
+ welcomeSocket.getLocalPort()));
socket = welcomeSocket.accept();
// while(true && flag){
// socket = welcomeSocket.accept();
mHandler.post(new DisplayToast(this, "Coneccted!"));
// }
mHandler.post(new DisplayToast(this, "Succes!"));
} catch (IOException e) {
mHandler.post(new DisplayToast(this, "IOException"));
} catch (Exception e) {
mHandler.post(new DisplayToast(this, "Exception"));
}
mHandler.post(new DisplayToast(this, "ServerService"));
}
/*
public void onDestroy() {
try {
welcomeSocket.close();
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
stopSelf();
}*/
}
class DisplayToast2 implements Runnable {
private final Context mContext;
String mText;
public DisplayToast2(Context mContext, String text) {
this.mContext = mContext;
mText = text;
}
public void run() {
Toast.makeText(mContext, mText, Toast.LENGTH_SHORT).show();
}
}
客户Activity:
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.wifi.p2p.WifiP2pDevice;
import android.net.wifi.p2p.WifiP2pInfo;
import android.net.wifi.p2p.WifiP2pManager;
import android.net.wifi.p2p.WifiP2pManager.Channel;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;
public class ClientActivity extends Activity {
Button button;
private WifiP2pManager wifiManager;
private Channel wifichannel;
private BroadcastReceiver wifiClientReceiver;
private IntentFilter wifiClientReceiverIntentFilter;
private WifiP2pInfo wifiInfo;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.client_activity);
// Block auto opening keyboard
this.getWindow()
.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
wifiManager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE);
wifichannel = wifiManager.initialize(this, getMainLooper(), null);
wifiClientReceiver = new WiFiClientBroadcastReceiver(wifiManager, wifichannel, this);
wifiClientReceiverIntentFilter = new IntentFilter();
;
wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_PEERS_CHANGED_ACTION);
wifiClientReceiverIntentFilter.addAction(WifiP2pManager.WIFI_P2P_CONNECTION_CHANGED_ACTION);
wifiClientReceiverIntentFilter
.addAction(WifiP2pManager.WIFI_P2P_THIS_DEVICE_CHANGED_ACTION);
wifiInfo = null;
registerReceiver(wifiClientReceiver, wifiClientReceiverIntentFilter);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
StartClient(null);
}
});
}
public void setNetworkToReadyState(boolean status, WifiP2pInfo info, WifiP2pDevice device) {
wifiInfo = info;
// targetDevice = device;
// connectedAndReadyToSendFile = status;
}
public void StartClient(View v) {
Intent intent = new Intent(this, ClientService.class);
intent.putExtra("wifiInfo", wifiInfo);
if (wifiInfo == null) {
Toast.makeText(this, "WifiInfo = null!", Toast.LENGTH_SHORT).show();
}
startService(intent);
}
}
客户端服务：
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import android.app.IntentService;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.p2p.WifiP2pInfo;
import android.os.Handler;
import android.widget.Toast;
public class ClientService extends IntentService {
Handler mHandler;
private WifiP2pInfo wifiInfo;
private int port = 2178;
Socket clientSocket = null;
OutputStream os = null;
public ClientService() {
super("ClientService");
mHandler = new Handler();
}
@Override
protected void onHandleIntent(Intent intent) {
wifiInfo = (WifiP2pInfo) intent.getExtras().get("wifiInfo");
InetAddress targetIP = wifiInfo.groupOwnerAddress;
clientSocket = new Socket();
if(wifiInfo.isGroupOwner)
{
try {
mHandler.post(new DisplayToast(this, "Try to connect: /N IP: " + targetIP + "/nPort: " +port));
clientSocket.connect(new InetSocketAddress(targetIP, port));
mHandler.post(new DisplayToast(this, "Connected!"));
//os = clientSocket.getOutputStream();
} catch (IOException e) {
mHandler.post(new DisplayToast(this, "serwer IOException: " + e.getMessage()));
} catch (Exception e) {
mHandler.post(new DisplayToast(this, "serwer Exception"));
}
}else{
mHandler.post(new DisplayToast(this, "Group owner = " + wifiInfo.isGroupOwner));
}
}
/*
public void onDestroy()
{
try {
os.close();
clientSocket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
stopSelf();
}*/
}
class DisplayToast implements Runnable {
private final Context mContext;
String mText;
public DisplayToast(Context mContext, String text) {
this.mContext = mContext;
mText = text;
}
public void run() {
Toast.makeText(mContext, mText, Toast.LENGTH_SHORT).show();
}
}
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".AppModeSelection"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name=".ServerService"
android:exported="false" />
<service
android:name=".ClientService"
android:exported="false" />
<activity android:name=".ServerActivity" >
</activity>
<activity android:name=".ClientActivity" >
</activity>
</application>
</manifest>
我正在使用两部支持 WiFi Direct 的手机（Samsung GT-I9505 Android 4.4.2 和 Samsung GT-I8190N Adroid 4.1.2）。首先，我关闭了所有连接（BT、WIFI），然后通过 WiFi Direct 连接。 GT-I9505 是服务器，另一台是客户端。建立连接时出现 IOException 错误：
IOException：无法连接到/192.168.49.1（端口 2178）：连接失败：ECONNREFUSED（连接被拒绝）
我尝试使用很多其他 Pors，但没有任何效果。我做错了什么？
提前感谢您的帮助！
更新：
我注意到，当我直接断开 WiFi 连接并再次连接时，但在其他方向上它可以工作，但只是暂时的。
你的代码的主要问题是你确实需要让它成为事件驱动的，在当前状态下我很惊讶它甚至真的做了任何事情。
因此，请尝试将其制作成如下所示： 1. 开始 Discovering peers，一旦你得到 Peers Changed 事件，然后做 requestPeers 2. 如果您需要一些侦听器等在另一端为您做好准备，那么您可能会通过广告服务来识别这些设备，因此接下来开始发现服务。 3. 发现服务后，启动 5 秒计时器等待任何其他服务，在每次发现服务后重置计时器，一旦计时器最终达到 运行 不间断的 5 秒，您可能已经发现了所有可用的服务那时候。 4. Select 一项服务并连接到该设备（你真的不能有多个连接）。 5. 获得已连接事件后，使用 requestConnectionInfo 获取连接信息。
那么请记住，在开始之前，您需要创建本地服务，以便对方可以看到它。然后，如果您的设备被选为组所有者，您可以继续播放广告，让更多客户端连接到您。但是如果你被选为Client，那么你就不能有传入的连接，所以你应该去掉广告。