我想通过wifi连接到硬件 . 我使用wifiManager连接但在实际设备中如果没有保存SSID和密码，我无法以编程方式连接到SSID并发送或接收任何数据 . 如果在设备中记住SSID和密码，那么我的代码运行良好 .
这是我连接到SSID的代码
private void connect2SSIDWifi() throws Exception{
WifiManager wifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifi.getConnectionInfo();
try{
if(wifiInfo.getSSID().equals(publicClass.ssid)) return;
}catch(Exception ex){}
try {
Thread.sleep(500);
} catch (InterruptedException e) {}
WifiConfiguration wc = new WifiConfiguration();
wc.SSID = "\""+publicClass.ssid+"\"";
wc.preSharedKey = "\""+publicClass.ps+"\"";
wc.hiddenSSID = true;
wc.status = WifiConfiguration.Status.ENABLED;
wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
wc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
wc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
int netid = wifi.addNetwork(wc);
wifi.enableNetwork(netid, true);
wifi.reconnect();
}
如果连接了wifi，发送数据的代码也能正常工作
Socket socket = new Socket();
socket.connect(new InetSocketAddress(publicClass.ip, publicClass.port), 300);
PrintWriter out = new PrintWriter(new BufferedWriter(
new OutputStreamWriter(socket.getOutputStream())), true);
out.println(Packet);
Log.d("tag",Packet);
Toast.makeText(context, "sent", Toast.LENGTH_SHORT).show();
socket.close();
1 回答
你添加了正确的权限吗？