Shulou(Shulou.com)06/03 Report--

How to use android code to set and open wifi hotspots and hot spots connections, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

Friends who use too fast teeth should know that they use the wifi hotspot when transferring files between two-day devices, and then the other one connects to the hotspot and transfers it. The amazing transmission speed of fast teeth should have something to do with its mechanism. I don't know what its search mechanism is, but I think it can be judged by the name of the hotspot. Let's talk about how to automatically create a wifi hotspot.

To create a wifi hotspot, you first need mobile phone support. It is recommended to develop a better mobile phone. Nearly half of the fake devices in our company do not support hotspots. In fact, it is very simple to create a hotspot, first get the wifi service, then configure the hotspot name, password, etc., and then open it through reflection to OK.

Let's take a look at the code implementation that creates hotspots:

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Package com.tel.lajoin.wifi.hotspot

Import java.lang.reflect.Method

Import android.app.Activity

Import android.content.Context

Import android.net.wifi.WifiConfiguration

Import android.net.wifi.WifiManager

Import android.os.Bundle

Import android.view.View

Import android.widget.Button

Public class HotspotActivity extends Activity {

Private WifiManager wifiManager

Private Button open

Private boolean flag=false

@ Override

Protected void onCreate (Bundle savedInstanceState) {

/ / TODO Auto-generated method stub

Super.onCreate (savedInstanceState)

SetContentView (R.layout.main)

/ / obtain wifi management service

WifiManager = (WifiManager) getSystemService (Context.WIFI_SERVICE)

Open= (Button) findViewById (R.id.open_hotspot)

/ / set hotspots through button events

Open.setOnClickListener (new View.OnClickListener () {

@ Override

Public void onClick (View v) {

/ / close if it is open, open if it is closed

Yes, please.

SetWifiApEnabled (flag)

}

});

}

/ / wifi hotspot switch

Public boolean setWifiApEnabled (boolean enabled) {

If (enabled) {/ / disable WiFi in any case

/ / wifi and hotspots cannot be turned on at the same time, so you need to turn off wifi when you open hotspots.

WifiManager.setWifiEnabled (false)

}

Try {

/ / configuration class of hotspot

WifiConfiguration apConfig = new WifiConfiguration ()

/ / configure the name of the hotspot (you can add a random number after the name)

ApConfig.SSID = "YRCCONNECTION"

/ / configure the password for the hotspot

ApConfig.preSharedKey= "12122112"

/ / set hotspots through reflection calls

Method method = wifiManager.getClass () .getMethod (

"setWifiApEnabled", WifiConfiguration.class, Boolean.TYPE)

/ / return to the hot spot open status

Return (Boolean) method.invoke (wifiManager, apConfig, enabled)

} catch (Exception e) {

Return false

}

}

}

Don't write about the layout, just a button, what everyone knows, it doesn't make sense to write. To achieve file transfer, of course, we also need to write a client that connects to hot spots. The process of connecting hotspots is to search for hotspots and then determine whether the hotspots conform to the rules and then connect.

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Package com.tel.lajoin.wifiscan

Import java.util.ArrayList

Import java.util.List

Import android.app.Activity

Import android.content.BroadcastReceiver

Import android.content.Context

Import android.content.Intent

Import android.content.IntentFilter

Import android.net.wifi.ScanResult

Import android.net.wifi.WifiConfiguration

Import android.net.wifi.WifiManager

Import android.os.Bundle

Public class MainActivity extends Activity {

Private List wifiList

Private WifiManager wifiManager

Private List passableHotsPot

Private WifiReceiver wifiReceiver

Private boolean isConnected=false

Private Button connect

@ Override

Public void onCreate (Bundle savedInstanceState) {

Super.onCreate (savedInstanceState)

Init ()

}

/ * initialization parameters * /

Public void init () {

SetContentView (R.layout.main)

Connect= (Button) findViewById (R.id.connect)

WifiManager = (WifiManager) getSystemService (Context.WIFI_SERVICE)

WifiReceiver = new WifiReceiver ()

/ / search for hotspots through button events

Connect.setOnClickListener (new View.OnClickListener () {

@ Override

Public void onClick (View v) {

WifiManager.startScan ()

}

});

}

/ * listen for changes in hotspots * /

Private final class WifiReceiver extends BroadcastReceiver {

@ Override

Public void onReceive (Context context, Intent intent) {

WifiList = wifiManager.getScanResults ()

If (wifiList = = null | | wifiList.size () = = 0 | | isConnected)

Return

OnReceiveNewNetworks (wifiList)

}

}

/ * determine whether a new wifi hotspot conforms to the specification when searching for it * /

Public void onReceiveNewNetworks (List wifiList) {

PassableHotsPot=new ArrayList ()

For (ScanResult result:wifiList) {

System.out.println (result.SSID)

If ((result.SSID) .clients ("YRCCONNECTION"))

PassableHotsPot.add (result.SSID)

}

Synchronized (this) {

ConnectToHotpot ()

}

}

/ * Connect to a hotspot * /

Public void connectToHotpot () {

If (passableHotsPot==null | | passableHotsPot.size () = = 0)

Return

WifiConfiguration wifiConfig=this.setWifiParams (passableHotsPot.get (0))

Int wcgID = wifiManager.addNetwork (wifiConfig)

Boolean flag=wifiManager.enableNetwork (wcgID, true)

IsConnected=flag

System.out.println ("connect success?" + flag)

}

/ * set the parameters of the hotspot to be connected * /

Public WifiConfiguration setWifiParams (String ssid) {

WifiConfiguration apConfig=new WifiConfiguration ()

ApConfig.SSID= "\" + ssid+ "\"

ApConfig.preSharedKey= "\" 12122112\ ""

ApConfig.hiddenSSID = true

ApConfig.status = WifiConfiguration.Status.ENABLED

ApConfig.allowedGroupCiphers.set (WifiConfiguration.GroupCipher.TKIP)

ApConfig.allowedGroupCiphers.set (WifiConfiguration.GroupCipher.CCMP)

ApConfig.allowedKeyManagement.set (WifiConfiguration.KeyMgmt.WPA_PSK)

ApConfig.allowedPairwiseCiphers.set (WifiConfiguration.PairwiseCipher.TKIP)

ApConfig.allowedPairwiseCiphers.set (WifiConfiguration.PairwiseCipher.CCMP)

ApConfig.allowedProtocols.set (WifiConfiguration.Protocol.RSN)

Return apConfig

}

@ Override

Protected void onDestroy () {

Super.onDestroy ()

/ * Log out of the broadcast on destruction * /

UnregisterReceiver (wifiReceiver)

}

}

The code is very simple, and there are comments, I believe everyone can understand. That's it. As for the file transfer advice, take a look at the articles related to socket.

After reading the above, have you mastered how to set up and open wifi hotspots and hotspots with android code? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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