Android Wifi 连接

Android 连接wif，搜索选择周边wifi，断开清除掉已保存的wifi

WIFI工具类

public class WifiAdmin {    // 定义WifiManager对象    private WifiManager mWifiManager;    // 定义WifiInfo对象    private WifiInfo mWifiInfo;    // 扫描出的网络连接列表    private List<ScanResult> mWifiList;    // 网络连接列表    private List<WifiConfiguration> mWifiConfiguration;    // 定义一个WifiLock    WifiLock mWifiLock;    // 构造器    public WifiAdmin(Context context) {        // 取得WifiManager对象        mWifiManager = (WifiManager) context                .getSystemService(Context.WIFI_SERVICE);        // 取得WifiInfo对象        mWifiInfo = mWifiManager.getConnectionInfo();    }    // 打开WIFI    public void openWifi() {        if (!mWifiManager.isWifiEnabled()) {            mWifiManager.setWifiEnabled(true);        }    }    // 关闭WIFI    public void closeWifi() {        if (mWifiManager.isWifiEnabled()) {            mWifiManager.setWifiEnabled(false);        }    }    // 检查当前WIFI状态    public int checkState() {        return mWifiManager.getWifiState();    }    // 锁定WifiLock    public void acquireWifiLock() {        mWifiLock.acquire();    }    // 解锁WifiLock    public void releaseWifiLock() {        // 判断时候锁定        if (mWifiLock.isHeld()) {            mWifiLock.acquire();        }    }    // 创建一个WifiLock    public void creatWifiLock() {        mWifiLock = mWifiManager.createWifiLock("Test");    }    // 得到配置好的网络    public List<WifiConfiguration> getConfiguration() {        return mWifiConfiguration;    }    // 指定配置好的网络进行连接    public void connectConfiguration(int index) {        // 索引大于配置好的网络索引返回        if (index > mWifiConfiguration.size()) {            return;        }        // 连接配置好的指定ID的网络        mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,                true);    }    public void startScan() {        mWifiManager.startScan();        // 得到扫描结果        mWifiList = mWifiManager.getScanResults();        // 得到配置好的网络连接        mWifiConfiguration = mWifiManager.getConfiguredNetworks();    }    // 得到网络列表    public List<ScanResult> getWifiList() {        return mWifiList;    }    // 查看扫描结果    public StringBuilder lookUpScan() {        StringBuilder stringBuilder = new StringBuilder();        for (int i = 0; i < mWifiList.size(); i++) {            stringBuilder                    .append("Index_" + new Integer(i + 1).toString() + ":");            // 将ScanResult信息转换成一个字符串包            // 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();    }    // 得到接入点的BSSID    public String getBSSID() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();    }    // 得到IP地址    public int getIPAddress() {        return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();    }    // 得到连接的ID    public int getNetworkId() {        return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();    }    // 得到WifiInfo的所有信息包    public String getWifiInfo() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();    }    // 添加一个网络并连接    public boolean addNetwork(WifiConfiguration wcg) {        int wcgID = mWifiManager.addNetwork(wcg);        boolean b =  mWifiManager.enableNetwork(wcgID, true);        System.out.println("a--" + wcgID);        System.out.println("b--" + b);        return b;    }    // 断开指定ID的网络    public void disconnectWifi(int netId) {        mWifiManager.disableNetwork(netId);        mWifiManager.disconnect();    }//然后是一个实际应用方法，只验证过没有密码的情况：    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;    }    public WifiManager getmWifiManager() {        return mWifiManager;    }    public void setmWifiManager(WifiManager mWifiManager) {        this.mWifiManager = mWifiManager;    }    public WifiInfo getmWifiInfo() {        return mWifiInfo;    }    public void setmWifiInfo(WifiInfo mWifiInfo) {        this.mWifiInfo = mWifiInfo;    }}//分为三种情况：1没有密码2用wep加密3用wpa加密

选择需要连接的wifi

public class ChooseWifiActivity extends Activity {    private ListView listView;    private List<ScanResult> scanResults = new ArrayList<>();    private ListAdapter listAdapter;    private Context context;    private WifiAdmin wifiAdmin;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_choose_wifi);        context = this;        initView();        initData();    }    private void initView(){        listView = (ListView)findViewById(R.id.list_ssid);    }    private void initData(){        wifiAdmin = new WifiAdmin(context);        listAdapter = new ListAdapter(context,R.layout.adapter_wifi_list,scanResults);        listView.setAdapter(listAdapter);        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                ScanResult scanResult = scanResults.get(position);                Intent intent = new Intent();                intent.putExtra("ssid",scanResult.SSID);                setResult(RESULT_OK,intent);                finish();            }        });        wifiAdmin.openWifi();        getChoiceWifiList();    }    private void getChoiceWifiList(){        runOnUiThread(new Runnable() {            @Override            public void run() {                wifiAdmin.startScan();                scanResults = wifiAdmin.getWifiList();                listAdapter.refresh(scanResults);            }        });    }    private class ListAdapter extends BaseAdapter{        private Context context;        private int resourceId;        private List<ScanResult> scanResults;        private ScanResult result;        private ViewHolder viewHolder;        public ListAdapter(Context context, int resourceId, List<ScanResult> objects){            this.context = context;            this.resourceId = resourceId;            this.scanResults = objects;        }        public void refresh(List<ScanResult> objects){            scanResults.clear();            scanResults.addAll(objects);            notifyDataSetChanged();        }        @Override        public int getCount() {            return scanResults.size();        }        @Override        public ScanResult getItem(int position) {            return null;        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            View itemView = convertView;            result = scanResults.get(position);            if (itemView == null){                LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);                viewHolder = new ViewHolder();                itemView = inflater.inflate(resourceId,null);                viewHolder.ssid = (TextView) itemView.findViewById(R.id.text_ssid);                itemView.setTag(viewHolder);            }else{                viewHolder = (ViewHolder)itemView.getTag();            }            viewHolder.ssid.setText(result.SSID);            return itemView;        }        class ViewHolder{            TextView ssid;        }    }}

主操作页面

public class MainActivity extends Activity implements View.OnClickListener{    private EditText edit_ssid;    private EditText edit_paw;    private Button btn_ssid;    private Button btn_remove;    private Button btn_connect;    private WifiAdmin wifiAdmin;    private Context context;    private Handler handler = new Handler();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        context = this;        initView();        initData();    }    private void initView(){        edit_ssid = (EditText)findViewById(R.id.edit_ssid);        edit_paw = (EditText)findViewById(R.id.edit_paw);        btn_ssid = (Button)findViewById(R.id.btn_ssid);        btn_connect = (Button)findViewById(R.id.btn_connect);        btn_remove = (Button)findViewById(R.id.btn_remove);    }    private void initData(){        edit_ssid.setOnClickListener(this);        edit_paw.setOnClickListener(this);        btn_ssid.setOnClickListener(this);        btn_connect.setOnClickListener(this);        btn_remove.setOnClickListener(this);        wifiAdmin = new WifiAdmin(context);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if(requestCode == 100){            if (data != null){                String ssid = data.getStringExtra("ssid");//wifi                edit_ssid.setText(ssid);            }        }    }    @Override    public void onClick(View v) {        switch (v.getId()){            case R.id.btn_ssid:                Intent intent = new Intent(context,ChooseWifiActivity.class);                startActivityForResult(intent,100);                break;            case R.id.btn_connect:                //wifiName is the SSID; wifiPass is the password;                WifiConfiguration wcg=wifiAdmin.CreateWifiInfo(String.valueOf(edit_ssid.getText()), String.valueOf(edit_paw.getText()),3);                wifiAdmin.addNetwork(wcg);                break;            case R.id.btn_remove:                //wifiName is the SSID; wifiPass is the password;                wifiAdmin.startScan();                List<WifiConfiguration> wifiConfigurations = wifiAdmin.getConfiguration();                for(WifiConfiguration configuration : wifiConfigurations){                    String editssid = String.valueOf(edit_ssid.getText());                    String ssid = configuration.SSID.replaceAll("\"","");                    if(ssid.equals(editssid)){                        wifiAdmin.getmWifiManager().removeNetwork(configuration.networkId);                        wifiAdmin.getmWifiManager().saveConfiguration();                        toastString("清除配置网络" + String.valueOf(edit_ssid.getText()));                        break;                    }                }                toastString("清除完成");                break;        }    }    private void toastString(final String str){        handler.post(new Runnable() {            @Override            public void run() {                Toast.makeText(context,str,Toast.LENGTH_SHORT);            }        });    }}

源码地址：http://download.csdn.net/download/feiniyan4944/10155054