B4A Library Wifi connect library (WEP,WPA,Open)

I am still missing library which enables me to connect to any type of secured wifi. So I made this code, but unfortunately due my lack of Java knowledge (actually its Eclipse which gives me headache) I am unable to build it.
public void connectToSSID(int tip) {

String networkSSID = txtUser.toString();
String networkPass = txtPass.toString();

WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"" + networkSSID + "\""; // Please note the quotes. String
// should contain ssid in quotes

tip = Integer.parseInt(txtTip.toString());

switch (tip) {
case 0: // OPEN
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);

case 1: // WEP
conf.wepKeys[0] = "\"" + networkPass + "\"";
conf.wepTxKeyIndex = 0;
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
break;

case 2: // WPA
conf.preSharedKey = "\"" + networkPass + "\"";

default:
break;
}

WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiManager.addNetwork(conf);

// CONNECT
List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
for (WifiConfiguration i : list) {
if (i.SSID != null && i.SSID.equals("\"" + networkSSID + "\"")) {
wifiManager.disconnect();
wifiManager.enableNetwork(i.networkId, true);
wifiManager.reconnect();

break;
}
}
}

I anybody is willing to join the project I would appreciate it.
 

bluedude

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Does not work, errors on WIFI type

Hi,

When I connect it gives me exception errors.

I connect this way:

wifi.connectToSSID (wifi.WIFI_WEP ,"home","test")
 

bluedude

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Exception details

Below the exception details:

sending message to waiting queue (OnActivityResult)
running waiting messages (1)
main_parsetag (java line: 1169)
java.lang.NullPointerException


at anywheresoftware.b4a.jalle007.wificonnect.WiFiConnect.connectToSSID(WiFiConnect.java:69)
at com.thingstank.apps.senseme.main._parsetag(main.java:1169)
at com.thingstank.apps.senseme.main._barreader_result(main.java:427)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:167)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:155)
at ice.zxing.b4aZXingLib$1.ResultArrived(b4aZXingLib.java:48)
at anywheresoftware.b4a.BA$4.run(BA.java:461)
at anywheresoftware.b4a.BA.setActivityPaused(BA.java:373)
at com.thingstank.apps.senseme.main$ResumeMessage.run(main.java:211)
at android.os.Handler.handleCallback(Handler.java:725)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
java.lang.NullPointerException
** Activity (main) Resume **
 

agraham

Expert
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Longtime User
It looks like

List list = wifiManager.getConfiguredNetworks();

returned null as the documentation so helpfully says!

"Upon failure to fetch or when when Wi-Fi is turned off, it can be null."

In the attached version 1.1 I've added a check for that and also an IsWiFiEnabled method that should return True if WiFi is enabled. Please try it.
 

Attachments

  • WiFiConnect1.1.zip
    2.7 KB · Views: 1,346

jalle007

Active Member
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Unfortunately this lib now doesn't work good form me.
It simply wont connect to any type of networks.

@agraham
could you please repost java source here or send it to PM

Thanks

edit:
thorugh log I can see that library executes at
B4X:
wifiManager.disconnect();
wifiManager.enableNetwork(i.networkId, true);
wifiManager.reconnect();
Log.w("WiFiConnect","Connected!");
showing "connected!" but actually it is not .

The problem I think is that android wifimanager creates duplicate wifi configurations.
although i did not add wifimanage.save() it still remembers all networks every time i connect or fail to connect

anyone with idea ?
 
Last edited:

agraham

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Here is the Java. If you improve it but don't want to post it yourself as a library then repost the source here and I will do it. I was thinking of extending this library but I don't have time to look at it at the moment.
 

Attachments

  • WiFiConnect1.1.zip
    1.1 KB · Views: 762

suciwulans

Active Member
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Agraham, do you have a sample projectwhich connect to wifi use WiFiConnect Library?
can you post here the project?
:sign0085:
 

imgsimonebiliato

Well-Known Member
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Longtime User
Hello,
I need to create an app that connect the tablet to different WPA or WPA2 networks wifi.

Trying this simple code:

B4X:
Dim w1 AsWiFiConnect
w1.connectToSSID(w1.WIFI_WPA, "test", "test")
If w1.IsWiFiEnabled Then Msgbox("connesso", "")

The application raise me this error
B4X:
PackageAdded: package:it.android.imgspa.and_WifiChange
** Activity (main) Create, isFirst = true **
main_activity_create (B4A line: 33)
w1.connectToSSID(w1.WIFI_WPA, "test", "test")
java.lang.SecurityException: WifiService: Neither user 10087 nor current process has android.permission.CHANGE_WIFI_STATE.
    at android.os.Parcel.readException(Parcel.java:1425)
    at android.os.Parcel.readException(Parcel.java:1379)
    at android.net.wifi.IWifiManager$Stub$Proxy.addOrUpdateNetwork(IWifiManager.java:610)
    at android.net.wifi.WifiManager.addOrUpdateNetwork(WifiManager.java:620)
    at android.net.wifi.WifiManager.addNetwork(WifiManager.java:582)
    at anywheresoftware.b4a.jalle007.wificonnect.WiFiConnect.connectToSSID(WiFiConnect.java:61)
    at it.android.imgspa.and_WifiChange.main._activity_create(main.java:242)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:167)
    at it.android.imgspa.and_WifiChange.main.afterFirstLayout(main.java:89)
    at it.android.imgspa.and_WifiChange.main.access$100(main.java:16)
    at it.android.imgspa.and_WifiChange.main$WaitForLayout.run(main.java:74)
    at android.os.Handler.handleCallback(Handler.java:615)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:153)
    at android.app.ActivityThread.main(ActivityThread.java:5086)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584)
    at dalvik.system.NativeStart.main(Native Method)
java.lang.SecurityException: WifiService: Neither user 10087 nor current process has android.permission.CHANGE_WIFI_STATE.

What's wrong?
 
Last edited:

imgsimonebiliato

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Longtime User
Add this line to the manifest editor:
B4X:
AddPermission(android.permission.CHANGE_WIFI_STATE)

Thanks Erel,
I noticed that everytime I start the app, it create a new wifi connection every time, how can I prevent it?
Also please, it is possible to create a widget that execute this code?
 

imgsimonebiliato

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Longtime User
I'm sorry but I'm not familiar with this library. Any code that doesn't require an activity can be implemented in a widget service.

Thanks Erel
 

jnbarban

Member
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Longtime User
Hi everyone, anyone know how to save wifi network ? this code work fine but if you stop Wifi, the network are lost..
 

eynysman

New Member
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Longtime User
hello

do not speak English, have little programming experience and ask for help

I'm doing a custom wifi network manager

I took example of how to connect on a wifi network and could

to disconnect I'm having problems

I am using the following example


Dim mywifi As VBConnect

Dim Wifi1 As WiFiConnect


Sub WiFiAdd_Click

Wifi1.connectToSSID(Wifi1.WIFI_WPA, “SSID1”, “123456789”)

End Sub


Sub WiFidisconnect_Click

mywifi.RemoveAllSavedNetworks ‘remove all saved networks End Sub


the doubt is, how to disconnect only one specific network, example: "Wifi1. disconnectToSSID ("SSID1") just unplugging "SSID1" network

clean out a Saved on my list of wi-fi network

Hold and thank you in advance

Eynysman Felix Pacheco

Cabo Frio – Rio de Janeiro - Brasil
 
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