android 中配置的 wifi 安全性发生变化时如何感知
How to sense when configured wifi security changes in android
我需要处理连接或在列表中配置所需 SSID 的情况，但同时如果它的安全性发生变化，我应该如何得到通知
目前，当所需网络已连接且同时其安全性发生变化时，我将请求状态设为 "Disconnected"。
我不是很了解你的需求。检查您的网络状态有何不同？ SupplicantState 的官方文档指出：
These enumeration values are used to indicate the current
wpa_supplicant state. This is more fine-grained than most users will
be interested in. In general, it is better to use NetworkInfo.State.
那么在您的应用中仅检查网络状态变化有何不同？
使用此方法，您可以感知何时发生任何变化....
/**
* Uppsala University
*
* Project CS course, Fall 2012
*
* Projekt DV/Project CS, is a course in which the students develop software for
* distributed systems. The aim of the course is to give insights into how a big
* project is run (from planning to realization), how to construct a complex
* distributed system and to give hands-on experience on modern construction
* principles and programming methods.
*
* All rights reserved.
*
* Copyright (C) 2012 LISA team
*/
package project.cs.lisa.networksettings;
import java.util.List;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.util.Log;
public class WifiHandler {
//constants
public static final int WEP = 1;
public static final int WAP = 2;
public static final int OPEN_NETWORK = 3;
public static final String TAG = "LISA_Network";
/** dfsdfsdfsdf. */
WifiConfiguration wifiConf; /* WifiConfiguration object */
/** dfsdfsdfsdf. */
WifiManager wifiMgr; /* WifiManager object */
/** dfsdfsdfsdf. */
WifiInfo wifiInfo; /* WifiInfo object */
/** dfsdfsdfsdf. */
List<ScanResult> wifiScan; /* List of ScanResult objects */
/**
* Constructor initializes WifiManager and WifiInfo.
* @param context
*/
public WifiHandler(Context context) {
wifiMgr = getWifiManager(context); // gets wifiMgr in the current context
wifiInfo = getWifiInfo(context); // gets wifiInfo in the current context
wifiConf = getWifiConf(context); // gets wifiConf in the current context
wifiScan = getWifiInRange(); // gets wifiScan in the current context
}
/**
* Function checkWifiEnabled checks if the WiFi connection
* is enabled on the device.
* @param wifiMgr
* @return true if the WiFi connection is enabled,
* false if the WiFi connection is disabled
*/
public boolean checkWifiEnabled() {
// checks if WiFi is enabled
return (wifiMgr != null && wifiMgr.isWifiEnabled());
}
/**
* Function enableWifi enables WiFi connection on the device.
* @param wifiMgr
* @return true if the attempt to enable WiFi succeeded,
* false if the attempt to enable WiFi failed.
*/
public boolean enableWifi() {
// enables WiFi connection
return wifiMgr.setWifiEnabled(true);
}
/**
* Function disableWifi disables WiFi connection on the device.
* @param wifiMgr
* @return true if WiFi connection was disabled,
* false if attempt to disable WiFi failed.
*/
public boolean disableWifi() {
// disables WiFi connection
return wifiMgr.setWifiEnabled(false);
}
/**
* Function getWifiManager gets the WiFiManager object from the device.
* @param context
* @return WifiManager object. Also sets the class variable
* wifiMgr as the WifiManager object returned.
*/
public WifiManager getWifiManager(Context context) {
WifiManager wifiMgr = null;
// gets WifiManager obj from the system
wifiMgr = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
if (wifiMgr == null) {
Log.d("TAG", "WIFI_SERVICE is the wrong service name.");
}
return wifiMgr;
}
/**
* Function getWifiInfo gets the current WiFi connection information in a
* WifiInfo object from the device.
* @param context
* @return wifiInfo created object or
* null if wifi is not enabled.
*/
public WifiInfo getWifiInfo(Context context) {
WifiInfo wifiInfo = null;
// gets WiFi network info of the current connection
if (checkWifiEnabled()) {
wifiInfo = (WifiInfo) wifiMgr.getConnectionInfo();
}
if (wifiInfo == null) {
Log.d("TAG", "WifiInfo object is empty.");
}
return wifiInfo;
}
/**
* Function that returns a WifiConfiguration object from the WifiInfo
* object from the class. If wifiInfo exists, then we are able to retrieve
* information from the current connection
* @param context
* @return WifiConfiguration object created.
*/
public WifiConfiguration getWifiConf(Context context) {
WifiConfiguration wifiConfiguration = new WifiConfiguration();
if (wifiInfo == null) {
Log.d("TAG", "WifiInfo object is empty");
return null;
}
wifiConfiguration.SSID = wifiInfo.getSSID();
wifiConfiguration.networkId = wifiInfo.getNetworkId();
return wifiConfiguration;
}
/**
* Creates a new WifiConfiguration object for wifiConf.
*/
public void clearWifiConfig() {
wifiConf = new WifiConfiguration();
}
/**
* Function getWifiInRange returns all the WiFi networks that are
* accessible through the access point (device AP) found during the
* last scan.
* @param wifi
* @return List of ScanResult containing information on all WiFi networks
* discovered in the range.
*/
public List<ScanResult> getWifiInRange() {
// gets ~last~ list of WiFi networks accessible through the access point.
return (wifiScan = (List<ScanResult>) wifiMgr.getScanResults());
}
/**
* Function that scans for wifi networks available in the devices range.
* @return true if scan started
* false if scan could not be started
*/
public boolean scanWifiInRange() {
if (!checkWifiEnabled()) {
return false;
}
if (!wifiMgr.startScan()) {
Log.d("TAG", "Failed to scan wifi's in range.");
return false;
}
return true;
}
/**
* Function to disconnect from the currently connected WiFi AP.
* @return true if disconnection succeeded
* false if disconnection failed
*/
public boolean disconnectFromWifi() {
return (wifiMgr.disconnect());
}
/**
* Function to connect to a selected network
* @param networkSSID network SSID name
* @param networkPassword network password
* @param networkId network ID from WifiManager
* @param SecurityProtocol network security protocol
* @return true if connection to selected network succeeded
* false if connection to selected network failed
*/
public boolean connectToSelectedNetwork(String networkSSID, String networkPassword) {
int networkId;
int SecurityProtocol = WEP;
// Clear wifi configuration variable
clearWifiConfig();
// Sets network SSID name on wifiConf
wifiConf.SSID = "\"" + networkSSID + "\"";
Log.d(TAG, "SSID Received: " + wifiConf.SSID);
switch(SecurityProtocol) {
// WEP "security".
case WEP:
wifiConf.wepKeys[0] = "\"" + networkPassword + "\"";
wifiConf.wepTxKeyIndex = 0;
wifiConf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
break;
// WAP security. We have to set preSharedKey.
case WAP:
wifiConf.preSharedKey = "\""+ networkPassword +"\"";
break;
// Network without security.
case OPEN_NETWORK:
wifiConf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
break;
}
// Add WiFi configuration to list of recognizable networks
if ((networkId = wifiMgr.addNetwork(wifiConf)) == -1) {
Log.d("TAG", "Failed to add network configuration!");
return false;
}
// Disconnect from current WiFi connection
if (!disconnectFromWifi()) {
Log.d("TAG", "Failed to disconnect from network!");
return false;
}
// Enable network to be connected
if (!wifiMgr.enableNetwork(networkId, true)) {
Log.d("TAG", "Failed to enable network!");
return false;
}
// Connect to network
if (!wifiMgr.reconnect()) {
Log.d("TAG", "Failed to connect!");
return false;
}
return true;
}
}
我需要处理连接或在列表中配置所需 SSID 的情况，但同时如果它的安全性发生变化，我应该如何得到通知
目前，当所需网络已连接且同时其安全性发生变化时，我将请求状态设为 "Disconnected"。
我不是很了解你的需求。检查您的网络状态有何不同？ SupplicantState 的官方文档指出：
These enumeration values are used to indicate the current wpa_supplicant state. This is more fine-grained than most users will be interested in. In general, it is better to use NetworkInfo.State.
那么在您的应用中仅检查网络状态变化有何不同？
使用此方法，您可以感知何时发生任何变化....
/**
* Uppsala University
*
* Project CS course, Fall 2012
*
* Projekt DV/Project CS, is a course in which the students develop software for
* distributed systems. The aim of the course is to give insights into how a big
* project is run (from planning to realization), how to construct a complex
* distributed system and to give hands-on experience on modern construction
* principles and programming methods.
*
* All rights reserved.
*
* Copyright (C) 2012 LISA team
*/
package project.cs.lisa.networksettings;
import java.util.List;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.util.Log;
public class WifiHandler {
//constants
public static final int WEP = 1;
public static final int WAP = 2;
public static final int OPEN_NETWORK = 3;
public static final String TAG = "LISA_Network";
/** dfsdfsdfsdf. */
WifiConfiguration wifiConf; /* WifiConfiguration object */
/** dfsdfsdfsdf. */
WifiManager wifiMgr; /* WifiManager object */
/** dfsdfsdfsdf. */
WifiInfo wifiInfo; /* WifiInfo object */
/** dfsdfsdfsdf. */
List<ScanResult> wifiScan; /* List of ScanResult objects */
/**
* Constructor initializes WifiManager and WifiInfo.
* @param context
*/
public WifiHandler(Context context) {
wifiMgr = getWifiManager(context); // gets wifiMgr in the current context
wifiInfo = getWifiInfo(context); // gets wifiInfo in the current context
wifiConf = getWifiConf(context); // gets wifiConf in the current context
wifiScan = getWifiInRange(); // gets wifiScan in the current context
}
/**
* Function checkWifiEnabled checks if the WiFi connection
* is enabled on the device.
* @param wifiMgr
* @return true if the WiFi connection is enabled,
* false if the WiFi connection is disabled
*/
public boolean checkWifiEnabled() {
// checks if WiFi is enabled
return (wifiMgr != null && wifiMgr.isWifiEnabled());
}
/**
* Function enableWifi enables WiFi connection on the device.
* @param wifiMgr
* @return true if the attempt to enable WiFi succeeded,
* false if the attempt to enable WiFi failed.
*/
public boolean enableWifi() {
// enables WiFi connection
return wifiMgr.setWifiEnabled(true);
}
/**
* Function disableWifi disables WiFi connection on the device.
* @param wifiMgr
* @return true if WiFi connection was disabled,
* false if attempt to disable WiFi failed.
*/
public boolean disableWifi() {
// disables WiFi connection
return wifiMgr.setWifiEnabled(false);
}
/**
* Function getWifiManager gets the WiFiManager object from the device.
* @param context
* @return WifiManager object. Also sets the class variable
* wifiMgr as the WifiManager object returned.
*/
public WifiManager getWifiManager(Context context) {
WifiManager wifiMgr = null;
// gets WifiManager obj from the system
wifiMgr = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
if (wifiMgr == null) {
Log.d("TAG", "WIFI_SERVICE is the wrong service name.");
}
return wifiMgr;
}
/**
* Function getWifiInfo gets the current WiFi connection information in a
* WifiInfo object from the device.
* @param context
* @return wifiInfo created object or
* null if wifi is not enabled.
*/
public WifiInfo getWifiInfo(Context context) {
WifiInfo wifiInfo = null;
// gets WiFi network info of the current connection
if (checkWifiEnabled()) {
wifiInfo = (WifiInfo) wifiMgr.getConnectionInfo();
}
if (wifiInfo == null) {
Log.d("TAG", "WifiInfo object is empty.");
}
return wifiInfo;
}
/**
* Function that returns a WifiConfiguration object from the WifiInfo
* object from the class. If wifiInfo exists, then we are able to retrieve
* information from the current connection
* @param context
* @return WifiConfiguration object created.
*/
public WifiConfiguration getWifiConf(Context context) {
WifiConfiguration wifiConfiguration = new WifiConfiguration();
if (wifiInfo == null) {
Log.d("TAG", "WifiInfo object is empty");
return null;
}
wifiConfiguration.SSID = wifiInfo.getSSID();
wifiConfiguration.networkId = wifiInfo.getNetworkId();
return wifiConfiguration;
}
/**
* Creates a new WifiConfiguration object for wifiConf.
*/
public void clearWifiConfig() {
wifiConf = new WifiConfiguration();
}
/**
* Function getWifiInRange returns all the WiFi networks that are
* accessible through the access point (device AP) found during the
* last scan.
* @param wifi
* @return List of ScanResult containing information on all WiFi networks
* discovered in the range.
*/
public List<ScanResult> getWifiInRange() {
// gets ~last~ list of WiFi networks accessible through the access point.
return (wifiScan = (List<ScanResult>) wifiMgr.getScanResults());
}
/**
* Function that scans for wifi networks available in the devices range.
* @return true if scan started
* false if scan could not be started
*/
public boolean scanWifiInRange() {
if (!checkWifiEnabled()) {
return false;
}
if (!wifiMgr.startScan()) {
Log.d("TAG", "Failed to scan wifi's in range.");
return false;
}
return true;
}
/**
* Function to disconnect from the currently connected WiFi AP.
* @return true if disconnection succeeded
* false if disconnection failed
*/
public boolean disconnectFromWifi() {
return (wifiMgr.disconnect());
}
/**
* Function to connect to a selected network
* @param networkSSID network SSID name
* @param networkPassword network password
* @param networkId network ID from WifiManager
* @param SecurityProtocol network security protocol
* @return true if connection to selected network succeeded
* false if connection to selected network failed
*/
public boolean connectToSelectedNetwork(String networkSSID, String networkPassword) {
int networkId;
int SecurityProtocol = WEP;
// Clear wifi configuration variable
clearWifiConfig();
// Sets network SSID name on wifiConf
wifiConf.SSID = "\"" + networkSSID + "\"";
Log.d(TAG, "SSID Received: " + wifiConf.SSID);
switch(SecurityProtocol) {
// WEP "security".
case WEP:
wifiConf.wepKeys[0] = "\"" + networkPassword + "\"";
wifiConf.wepTxKeyIndex = 0;
wifiConf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
wifiConf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
break;
// WAP security. We have to set preSharedKey.
case WAP:
wifiConf.preSharedKey = "\""+ networkPassword +"\"";
break;
// Network without security.
case OPEN_NETWORK:
wifiConf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
break;
}
// Add WiFi configuration to list of recognizable networks
if ((networkId = wifiMgr.addNetwork(wifiConf)) == -1) {
Log.d("TAG", "Failed to add network configuration!");
return false;
}
// Disconnect from current WiFi connection
if (!disconnectFromWifi()) {
Log.d("TAG", "Failed to disconnect from network!");
return false;
}
// Enable network to be connected
if (!wifiMgr.enableNetwork(networkId, true)) {
Log.d("TAG", "Failed to enable network!");
return false;
}
// Connect to network
if (!wifiMgr.reconnect()) {
Log.d("TAG", "Failed to connect!");
return false;
}
return true;
}
}