Android WIFI Information Retrieval

You can obtain WIFI information in androi through the Wi-Fi Service provided by the system.

[Java]
WifiManager wifi_service = (WifiManager) getSystemService (WIFI_SERVICE );
WifiInfo wifiInfo = wifi_service.getConnectionInfo ();

Among them, WifiInfo has the following common information:
[Java]
/*
Info. getBSSID (); obtain the BSSID address.
Info. getSSID (); get the SSID address. ID of the network to be connected
Info. getIpAddress (); obtain the IP address. 4-byte Int, XXX. XXX every XXX is a byte
Info. getMacAddress (); obtain the MAC address.
Info. getNetworkId (); obtain the network ID.
Info. getLinkSpeed (); get the connection speed to let the user know this information.
Info. getreceipt (); obtain the receipt of the signal strength indication.
*/

At the same time, you can obtain the current WIFI status by receiving system broadcasts.
[Java]
/*
WifiManager. WIFI_STATE_DISABLING is stopping
WifiManager. WIFI_STATE_DISABLED stopped
WifiManager. WIFI_STATE_ENABLING is enabling
WifiManager. WIFI_STATE_ENABLED Enabled
WifiManager. WIFI_STATE_UNKNOWN unknown
*/

The following are examples:
1. Add a WIFI icon and text (activity_wifi_example.xml) to the layout file)
[Html]
<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android"
Xmlns: tools = "http://schemas.android.com/tools"
Android: layout_width = "match_parent"
Android: layout_height = "match_parent"
Android: gravity = "center"
Android: orientation = "vertical">
 
<ImageButton
Android: id = "@ + id/Icon_WifiStatus"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: src = "@ drawable/ic_wifi"/>

<TextView
Android: id = "@ + id/Label_WifiDetail"
Android: layout_width = "wrap_content"
Android: layout_height = "wrap_content"
Android: maxWidth = "320dp"/>
 
</LinearLayout>

2. Add an optional set of icons for the WIFI icon and add the ic_wifi.xml file under the drawable-hdpi directory. The content is as follows:
[Html] view plaincopy
<Level-list xmlns: android = "http://schemas.android.com/apk/res/android">
<Item android: maxLevel = "0" android: drawable = "@ drawable/ic_wifi_s0"/>
<Item android: maxLevel = "50" android: drawable = "@ drawable/ic_wifi_s3"/>
<Item android: maxLevel = "70" android: drawable = "@ drawable/ic_wifi_s2"/>
<Item android: maxLevel = "100" android: drawable = "@ drawable/ic_wifi_s1"/>
</Level-list>
Note the image to be imported

3. Receive the WIFI status broadcast in the Code and enable a Ms Timer to query the WIFI status in real time (WifiExample. java)

[Java]
Package com. example. wifiexample;
 
Import android. app. Activity;
Import android. content. BroadcastReceiver;
Import android. content. Context;
Import android. content. Intent;
Import android. content. IntentFilter;
Import android.net. wifi. WifiInfo;
Import android.net. wifi. WifiManager;
Import android. OS. Bundle;
Import android. OS. Handler;
Import android. util. Log;
Import android. view. Menu;
Import android. widget. ImageButton;
Import android. widget. TextView;
 
Public class WifiExample extends Activity {
 
Private final String TAG = "WifiExample ";

Private IntentFilter mWifiIntentFilter;
Private BroadcastReceiver mWifiIntentReceiver;

Private ImageButton mIconWifi;
Private TextView mLabelWifi;
Private Handler mHandler;

@ Override
Public void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_wifi_example );

MIconWifi = (ImageButton) findViewById (R. id. Icon_WifiStatus );
MLabelWifi = (TextView) findViewById (R. id. Label_WifiDetail );

MWifiIntentFilter = new IntentFilter ();
MWifiIntentFilter. addAction (WifiManager. WIFI_STATE_CHANGED_ACTION );

MWifiIntentReceiver = new mWifiIntentReceiver ();
RegisterReceiver (mWifiIntentReceiver, mWifiIntentFilter );

MHandler = new Handler ();
MHandler. post (new TimerProcess ());
}
 
@ Override
Public boolean onCreateOptionsMenu (Menu menu ){
GetMenuInflater (). inflate (R. menu. activity_wifi_example, menu );
Return true;
}

Private class TimerProcess implements Runnable {
Public void run (){
ShowWIFIDetail ();
MHandler. postDelayed (this, 500 );
}
}

Public void showWIFIDetail ()
{
WifiInfo info = (WifiManager) getSystemService (WIFI_SERVICE). getConnectionInfo ();
MIconWifi. setImageLevel (Math. abs (info. getarg ()));

/*
Info. getBSSID (); obtain the BSSID address.
Info. getSSID (); get the SSID address. ID of the network to be connected
Info. getIpAddress (); obtain the IP address. 4-byte Int, XXX. XXX every XXX is a byte
Info. getMacAddress (); obtain the MAC address.
Info. getNetworkId (); obtain the network ID.
Info. getLinkSpeed (); get the connection speed to let the user know this information.
Info. getreceipt (); obtain the receipt of the signal strength indication.
*/

Int Ip = info. getIpAddress ();
String strIp = "" + (Ip & 0xFF) + ". "+ (Ip> 8) & 0xFF) + ". "+ (Ip> 16) & 0xFF) + ". "+ (Ip> 24) & 0xFF );

MLabelWifi. setText ("BSSID:" + info. getBSSID () + "\ nSSID:" + info. getSSID () +
"\ NIpAddress:" + strIp + "\ nMacAddress:" + info. getMacAddress () +
"\ NNetworkId:" + info. getNetworkId () + "\ nLinkSpeed:" + info. getLinkSpeed () + "Mbps" +
"\ NRssi:" + info. getarg ());
Info. getIpAddress ();
}

Private class mWifiIntentReceiver extends BroadcastReceiver {
 
Public void onReceive (Context context, Intent intent ){
 
WifiInfo info = (WifiManager) getSystemService (WIFI_SERVICE). getConnectionInfo ();
MIconWifi. setImageLevel (Math. abs (info. getarg ()));

/*
WifiManager. WIFI_STATE_DISABLING is stopping
WifiManager. WIFI_STATE_DISABLED stopped
WifiManager. WIFI_STATE_ENABLING is enabling
WifiManager. WIFI_STATE_ENABLED Enabled
WifiManager. WIFI_STATE_UNKNOWN unknown
*/

Switch (intent. getIntExtra ("wifi_state", 0 )){
Case WifiManager. WIFI_STATE_DISABLING:
Log. d (TAG, "wifi status: WIFI_STATE_DISABLING ");
Break;
Case WifiManager. WIFI_STATE_DISABLED:
Log. d (TAG, "wifi status: WIFI_STATE_DISABLED ");
Break;
Case WifiManager. WIFI_STATE_ENABLING:
Log. d (TAG, "wifi status: WIFI_STATE_ENABLING ");
Break;
Case WifiManager. WIFI_STATE_ENABLED:
Log. d (TAG, "wifi status: WIFI_STATE_ENABLED ");
Break;
Case WifiManager. WIFI_STATE_UNKNOWN:
Log. d (TAG, "wifi status: WIFI_STATE_UNKNOWN ");
Break;
}
}
}
}

4. Added support for obtaining WIFI permissions in AndroidManifest. xml.
[Html]
<Uses-permission android: name = "android. permission. ACCESS_WIFI_STATE"/>