android WIFI的一些屬性

來源:互聯網
上載者:User

package com.example.wifitest;

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.net.wifi.WifiManager.WifiLock;public class WifiAdmin {    // 定義WifiManager對象    private WifiManager mWifiManager;    // 定義WifiInfo對象    private WifiInfo mWifiInfo;    // 掃描出的網路連接列表    private List<ScanResult> mWifiList;    // 網路連接列表    private List<WifiConfiguration> mWifiConfiguration;    // 定義一個WifiLock    WifiLock mWifiLock;    // 構造器    public WifiAdmin(Context context) {        // 取得WifiManager對象        mWifiManager = (WifiManager) context                .getSystemService(Context.WIFI_SERVICE);        // 取得WifiInfo對象        mWifiInfo = mWifiManager.getConnectionInfo();    }    // 開啟WIFI    public void openWifi() {        if (!mWifiManager.isWifiEnabled()) {            mWifiManager.setWifiEnabled(true);        }    }    // 關閉WIFI    public void closeWifi() {        if (mWifiManager.isWifiEnabled()) {            mWifiManager.setWifiEnabled(false);        }    }    // 檢查當前WIFI狀態    public int checkState() {        return mWifiManager.getWifiState();    }    // 鎖定WifiLock    public void acquireWifiLock() {        mWifiLock.acquire();    }    // 解鎖WifiLock    public void releaseWifiLock() {        // 判斷時候鎖定        if (mWifiLock.isHeld()) {            mWifiLock.acquire();        }    }    // 建立一個WifiLock    public void creatWifiLock() {        mWifiLock = mWifiManager.createWifiLock("Test");    }    // 得到配置好的網路    public List<WifiConfiguration> getConfiguration() {        return mWifiConfiguration;    }    // 指定配置好的網路進行串連    public void connectConfiguration(int index) {        // 索引大於配置好的網路索引返回        if (index > mWifiConfiguration.size()) {            return;        }        // 串連配置好的指定ID的網路        mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,                true);    }    public void startScan() {        mWifiManager.startScan();        // 得到掃描結果        mWifiList = mWifiManager.getScanResults();        // 得到配置好的網路連接        mWifiConfiguration = mWifiManager.getConfiguredNetworks();    }    // 得到網路列表    public List<ScanResult> getWifiList() {        return mWifiList;    }    // 查看掃描結果    public StringBuilder lookUpScan() {        StringBuilder stringBuilder = new StringBuilder();        for (int i = 0; i < mWifiList.size(); i++) {            stringBuilder                    .append("Index_" + new Integer(i + 1).toString() + ":");            // 將ScanResult資訊轉換成一個字串包            // 其中把包括:BSSID、SSID、capabilities、frequency、level            stringBuilder.append((mWifiList.get(i)).toString());            stringBuilder.append("/n");        }        return stringBuilder;    }    // 得到MAC地址    public String getMacAddress() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();    }    // 得到存取點的BSSID    public String getBSSID() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();    }    // 得到IP地址    public int getIPAddress() {        return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();    }    // 得到串連的ID    public int getNetworkId() {        return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();    }    // 得到WifiInfo的所有資訊包    public String getWifiInfo() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();    }    // 添加一個網路並串連    public void addNetwork(WifiConfiguration wcg) {        int wcgID = mWifiManager.addNetwork(wcg);        boolean b = mWifiManager.enableNetwork(wcgID, true);        System.out.println("a--" + wcgID);        System.out.println("b--" + b);    }    // 斷開指定ID的網路    public void disconnectWifi(int netId) {        mWifiManager.disableNetwork(netId);        mWifiManager.disconnect();    }    // 然後是一個實際應用方法,只驗證過沒有密碼的情況:    public WifiConfiguration CreateWifiInfo(String SSID, String Password,            int Type) {        WifiConfiguration config = new WifiConfiguration();        config.allowedAuthAlgorithms.clear();        config.allowedGroupCiphers.clear();        config.allowedKeyManagement.clear();        config.allowedPairwiseCiphers.clear();        config.allowedProtocols.clear();        config.SSID = "\"" + SSID + "\"";        WifiConfiguration tempConfig = this.IsExsits(SSID);        if (tempConfig != null) {            mWifiManager.removeNetwork(tempConfig.networkId);        }        if (Type == 1) // WIFICIPHER_NOPASS        {            config.wepKeys[0] = "";            config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);            config.wepTxKeyIndex = 0;        }        if (Type == 2) // WIFICIPHER_WEP        {            config.hiddenSSID = true;            config.wepKeys[0] = "\"" + Password + "\"";            config.allowedAuthAlgorithms                    .set(WifiConfiguration.AuthAlgorithm.SHARED);            config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);            config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);            config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);            config.allowedGroupCiphers                    .set(WifiConfiguration.GroupCipher.WEP104);            config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);            config.wepTxKeyIndex = 0;        }        if (Type == 3) // WIFICIPHER_WPA        {            config.preSharedKey = "\"" + Password + "\"";            config.hiddenSSID = true;            config.allowedAuthAlgorithms                    .set(WifiConfiguration.AuthAlgorithm.OPEN);            config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);            config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);            config.allowedPairwiseCiphers                    .set(WifiConfiguration.PairwiseCipher.TKIP);            // config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);            config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);            config.allowedPairwiseCiphers                    .set(WifiConfiguration.PairwiseCipher.CCMP);            config.status = WifiConfiguration.Status.ENABLED;        }        return config;    }    private WifiConfiguration IsExsits(String SSID) {        List<WifiConfiguration> existingConfigs = mWifiManager                .getConfiguredNetworks();        for (WifiConfiguration existingConfig : existingConfigs) {            if (existingConfig.SSID.equals("\"" + SSID + "\"")) {                return existingConfig;            }        }        return null;    }}

 

 

 

 


}
//分為三種情況:1沒有密碼2用wep加密3用wpa加密

改動主要集中在CreateWifiInfo這個方法中,並且添加了一個私人方法:

(1)將與方法的第三個參數有關的變數都改成int型,或者使用原作者的枚舉型(存在bug需要改正),但枚舉會在後續的開發中遇到些困難;

(2)在if(type == 3)中注釋掉“config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);”,並添加“

config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP); config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);“這兩句,否則當wifi熱點需要輸入密碼時,無法加入網路。

(3)在代碼末尾添加了方法IsExsits,原因在於如果按照網上介紹的方法成功加入指定的wifi後,都會在終端的wifi列表中新添加一個以該指定ssid的網路,所以每運行一次程式,列表中就會多一個相同名字的ssid。而該方法就是檢查wifi列表中是否有以輸入參數為名的wifi熱點,如果存在,則在CreateWifiInfo方法開始配置wifi網路之前將其移除,以避免ssid的重複:

WifiConfiguration tempConfig = this.IsExsits(SSID);         

          if(tempConfig != null) {

          mWifiManager.removeNetwork(tempConfig.networkId);

          }

以上便是wifi工具類的建立,之後就可以在其他部分執行個體化這個類,調用其中的方法完成加入指定ssid的wifi熱點,還是先上代碼吧,建立一個名為Test_wifiActivity.java的檔案(同上,沒有包含包聲明和import語句):

public class Test_wifiActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                WifiAdmin wifiAdmin = new WifiAdmin(this);        wifiAdmin.openWifi();        wifiAdmin.addNetwork(wifiAdmin.CreateWifiInfo("XXX", "XXX", 3));    }}

很簡單,如果是接入wifi,大體上只涉及到openWifi(開啟wifi)、CreateWifiInfo(配置wifi網路資訊)和addNetwork(添加配置好的網路並串連),對CreateWifiInfo進行簡單的說明:第一參數是SSID的名稱;第二個參數是指定SSID網路的密碼,當不要求輸入密碼是置空(”“);第三個參數是熱點類型:1-無密碼 / 2-WEP密碼驗證(未測試)/ 3-WAP或WAP2 PSK密碼驗證。
最後就是在Manifest中添加相應的許可權了:

<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" ></uses-permission>    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" ></uses-permission>    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" ></uses-permission>    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" ></uses-permission> 

 

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