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小米路由器4开发版，Android WiFi开发

 2023-09-26 阅读 19 评论 0

摘要：概述 介绍Android WiFi的扫描、连接、信息、以及WiFi热点等等的实现，并用代码实现。 详细 代码下载：http://www.demodashi.com/demo/10660.html 一、准备工作 开发环境： jdk1.8 Eclipse Luna Service Release 1 (4.4.1) 运行环境： 华为荣耀6

概述

介绍Android WiFi的扫描、连接、信息、以及WiFi热点等等的实现，并用代码实现。

详细

代码下载：http://www.demodashi.com/demo/10660.html

一、准备工作

开发环境：

jdk1.8

Eclipse Luna Service Release 1 (4.4.1)

运行环境：

华为荣耀6（Android4.4）、华为p9（Android7.0）

实现功能：

  • Android WiFi开发 （一）扫描、连接、信息

  • Android WiFi开发 （二）Wifi热点

二、代码结构

代码包里面，有两个部分，一个是源码，一个是V7支持包。

image.png

（源码项目）

image.png

（V7包）

三、Android WiFi开发 （一）扫描、连接、信息

1、详细讲解

在平常开发中经常会涉及到wifi相关的内容，在此将之前所用到的整理一下，以免忘记。

操作wifi的相关类，主要放在Android.net.wifi包下面。使用wifi相关方法需要申请一些权限：

image.png

ACCESS_WIFI_STATE 获取WiFi状态。小米路由器4开发版？

CHANGE_WIFI_STATE 改变WiFi状态。

CHANGE_WIFI_MULTICAST_STATE 改变WiFi多播状态

申请权限方式：在AndroidManifest.xml文件中填写

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

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

wifi相关操作所需要用到的类。

image.png

先说一下wifi的基本使用情况。

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;  
import android.widget.Toast;  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(Context context) {    if (!mWifiManager.isWifiEnabled()) {    mWifiManager.setWifiEnabled(true);  }else if (mWifiManager.getWifiState() == 2) {  Toast.makeText(context,"亲，Wifi正在开启，不用再开了", Toast.LENGTH_SHORT).show();  }else{  Toast.makeText(context,"亲，Wifi已经开启,不用再开了", Toast.LENGTH_SHORT).show();  }  }    // 关闭WIFI     public void closeWifi(Context context) {    if (mWifiManager.isWifiEnabled()) {    mWifiManager.setWifiEnabled(false);    }else if(mWifiManager.getWifiState() == 1){  Toast.makeText(context,"亲，Wifi已经关闭，不用再关了", Toast.LENGTH_SHORT).show();  }else if (mWifiManager.getWifiState() == 0) {  Toast.makeText(context,"亲，Wifi正在关闭，不用再关了", Toast.LENGTH_SHORT).show();  }else{  Toast.makeText(context,"请重新关闭", Toast.LENGTH_SHORT).show();  }  }    // 检查当前WIFI状态     public void checkState(Context context) {    if (mWifiManager.getWifiState() == 0) {  Toast.makeText(context,"Wifi正在关闭", Toast.LENGTH_SHORT).show();  } else if (mWifiManager.getWifiState() == 1) {  Toast.makeText(context,"Wifi已经关闭", Toast.LENGTH_SHORT).show();  } else if (mWifiManager.getWifiState() == 2) {  Toast.makeText(context,"Wifi正在开启", Toast.LENGTH_SHORT).show();  } else if (mWifiManager.getWifiState() == 3) {  Toast.makeText(context,"Wifi已经开启", Toast.LENGTH_SHORT).show();  } else {  Toast.makeText(context,"没有获取到WiFi状态", Toast.LENGTH_SHORT).show();  }    }    // 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(Context context) {    mWifiManager.startScan();    // 得到扫描结果     mWifiList = mWifiManager.getScanResults();    // 得到配置好的网络连接     mWifiConfiguration = mWifiManager.getConfiguredNetworks();   if (mWifiList == null) {  if(mWifiManager.getWifiState()==3){  Toast.makeText(context,"当前区域没有无线网络", Toast.LENGTH_SHORT).show();  }else if(mWifiManager.getWifiState()==2){  Toast.makeText(context,"WiFi正在开启，请稍后重新点击扫描", Toast.LENGTH_SHORT).show();  }else{  Toast.makeText(context,"WiFi没有开启，无法扫描", Toast.LENGTH_SHORT).show();  }  }  }    // 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 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);   }    // 断开指定ID的网络     public void disconnectWifi(int netId) {    mWifiManager.disableNetwork(netId);    mWifiManager.disconnect();    }  public void removeWifi(int netId) {  disconnectWifi(netId);  mWifiManager.removeNetwork(netId);  }  //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;      }   
}

如图所示：

image.png

俩bug

这些代码看起来没有什么问题，但是通过不同环境的测试，发现了一些问题。

1 测试到的wifi热点，有的ssid为”“，也就是ssid ！＝ null,获取不到said。android open source project？

2 wifi列表中有许多同名的wifi热点，也就是扫描的结果中有重合部分，并不是有多个同名的wifi热点。

第一个问题ssid为“”，这个看设置中并没有多余wifi，但这个热点点其它信息可以获取到，说明这个热点是存在的，应该是该热点隐藏了，所以获取不到。这也就是手机设置中为什么会有添加网路的按钮了。

第二个问题，当附近wifi热点比较少时不会出现此问题，当附近wifi网络比较多时会出现此问题。这就需要将同名的热点进行删除，但是如果真有两个ssid名相同的wifi，那就可以通过capabilities去区分吧，如果capabilities也相同就没办法了，系统设置里面也不显示同名的。wifi模块开发？

修改上面的方法 startScan（）。

public void startScan(Context context) {    mWifiManager.startScan();  //得到扫描结果   List<ScanResult> results = mWifiManager.getScanResults();   // 得到配置好的网络连接   mWifiConfiguration = mWifiManager.getConfiguredNetworks();   if (results == null) {  if(mWifiManager.getWifiState()==3){  Toast.makeText(context,"当前区域没有无线网络",Toast.LENGTH_SHORT).show();  }else if(mWifiManager.getWifiState()==2){  Toast.makeText(context,"wifi正在开启，请稍后扫描", Toast.LENGTH_SHORT).show();  }else{Toast.makeText(context,"WiFi没有开启", Toast.LENGTH_SHORT).show();  }  } else {  mWifiList = new ArrayList();  for(ScanResult result : results){   if (result.SSID == null || result.SSID.length() == 0 || result.capabilities.contains("[IBSS]")) {  continue;  }  boolean found = false;  for(ScanResult item:mWifiList){   if(item.SSID.equals(result.SSID)&&item.capabilities.equals(result.capabilities)){  found = true;break;   }  }   if(!found){  mWifiList.add(result);  }   }   }   
}

这样就可以避免出现上面的两种情况了。

image.png

代码：

public class MainActivity extends Activity implements OnClickListener {  public static final String TAG = "MainActivity";  private Button check_wifi,open_wifi,close_wifi,scan_wifi;  private ListView mlistView;  protected WifiAdmin mWifiAdmin;  private List<ScanResult> mWifiList;  public int level;  protected String ssid;  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  mWifiAdmin = new WifiAdmin(MainActivity.this);  initViews();  IntentFilter filter = new IntentFilter(  WifiManager.NETWORK_STATE_CHANGED_ACTION);  //="android.net.wifi.STATE_CHANGE"  监听wifi状态的变化  registerReceiver(mReceiver, filter);  mlistView.setOnItemClickListener(new OnItemClickListener() {  @Override  public void onItemClick(AdapterView<?> parent, View view,  int position, long id) {  AlertDialog.Builder alert=new AlertDialog.Builder(MainActivity.this);  ssid=mWifiList.get(position).SSID;  alert.setTitle(ssid);  alert.setMessage("输入密码");  final EditText et_password=new EditText(MainActivity.this);  final SharedPreferences preferences=getSharedPreferences("wifi_password",Context.MODE_PRIVATE);  et_password.setText(preferences.getString(ssid, ""));  alert.setView(et_password);  //alert.setView(view1);  alert.setPositiveButton("连接", new DialogInterface.OnClickListener(){  @Override  public void onClick(DialogInterface dialog, int which) {  String pw = et_password.getText().toString();  if(null == pw  || pw.length() < 8){  Toast.makeText(MainActivity.this, "密码至少8位", Toast.LENGTH_SHORT).show();  return;      }  Editor editor=preferences.edit();  editor.putString(ssid, pw);   //保存密码  editor.commit();          mWifiAdmin.addNetwork(mWifiAdmin.CreateWifiInfo(ssid, et_password.getText().toString(), 3));  }  });  alert.setNegativeButton("取消", new DialogInterface.OnClickListener(){  @Override  public void onClick(DialogInterface dialog, int which) {  //  //mWifiAdmin.removeWifi(mWifiAdmin.getNetworkId());  }  });  alert.create();  alert.show();  }  });  }  /* * 控件初始化 * */  private void initViews() {  check_wifi=(Button) findViewById(R.id.check_wifi);  open_wifi=(Button) findViewById(R.id.open_wifi);  close_wifi=(Button) findViewById(R.id.close_wifi);  scan_wifi=(Button) findViewById(R.id.scan_wifi);  mlistView=(ListView) findViewById(R.id.wifi_list);                check_wifi.setOnClickListener(MainActivity.this);  open_wifi.setOnClickListener(MainActivity.this);  close_wifi.setOnClickListener(MainActivity.this);  scan_wifi.setOnClickListener(MainActivity.this);  }  @Override  public void onClick(View v) {  switch (v.getId()) {  case R.id.check_wifi:  mWifiAdmin.checkState(MainActivity.this);  break;  case R.id.open_wifi:  mWifiAdmin.openWifi(MainActivity.this);  break;  case R.id.close_wifi:  mWifiAdmin.closeWifi(MainActivity.this);  break;  case R.id.scan_wifi:  mWifiAdmin.startScan(MainActivity.this);  mWifiList=mWifiAdmin.getWifiList();  if(mWifiList!=null){  mlistView.setAdapter(new MyAdapter(this,mWifiList));  new Utility().setListViewHeightBasedOnChildren(mlistView);  }  break;  default:  break;  }  }  public class MyAdapter extends BaseAdapter{  LayoutInflater inflater;  List<ScanResult> list;  public MyAdapter(Context context, List<ScanResult> list){  this.inflater=LayoutInflater.from(context);  this.list=list;  }  @Override  public int getCount() {  return list.size();  }  @Override  public Object getItem(int position) {  return position;  }  @Override  public long getItemId(int position) {  return position;  }  @SuppressLint({ "ViewHolder", "InflateParams" })  @Override  public View getView(int position, View convertView, ViewGroup parent) {  View view=null;  view=inflater.inflate(R.layout.wifi_listitem, null);  ScanResult scanResult = list.get(position);  TextView wifi_ssid=(TextView) view.findViewById(R.id.ssid);  ImageView wifi_level=(ImageView) view.findViewById(R.id.wifi_level);  wifi_ssid.setText(scanResult.SSID);  Log.i(TAG, "scanResult.SSID="+scanResult);  level=WifiManager.calculateSignalLevel(scanResult.level,5);  if(scanResult.capabilities.contains("WEP")||scanResult.capabilities.contains("PSK")||  scanResult.capabilities.contains("EAP")){  wifi_level.setImageResource(R.drawable.wifi_signal_lock);  }else{  wifi_level.setImageResource(R.drawable.wifi_signal_open);  }  wifi_level.setImageLevel(level);  //判断信号强度，显示对应的指示图标    return view;  }  }  /*设置listview的高度*/  public class Utility {   public void setListViewHeightBasedOnChildren(ListView listView) {   ListAdapter listAdapter = listView.getAdapter();    if (listAdapter == null) {   return;   }   int totalHeight = 0;   for (int i = 0; i < listAdapter.getCount(); i++) {   View listItem = listAdapter.getView(i, null, listView);   listItem.measure(0, 0);   totalHeight += listItem.getMeasuredHeight();   }   ViewGroup.LayoutParams params = listView.getLayoutParams();   params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));   listView.setLayoutParams(params);   }   }  //监听wifi状态  private BroadcastReceiver mReceiver = new BroadcastReceiver (){    @Override    public void onReceive(Context context, Intent intent) {     ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);    NetworkInfo wifiInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);     if(wifiInfo.isConnected()){  WifiManager wifiManager = (WifiManager) context  .getSystemService(Context.WIFI_SERVICE);  String wifiSSID = wifiManager.getConnectionInfo()  .getSSID();  Toast.makeText(context, wifiSSID+"连接成功", 1).show();  }                  }     };   
}

2、相关类说明补充

ScanResult类

image.png

这个类主要是通过Wifi硬件的扫描来获取一些周边的wifi热点（access point）的信息。该类主要有5个域，

image.png

打印信息如下所示：

image.png

WifiConfiguration类

通过该类获取一个wifi网络的网络配置，包括安全配置等。它包含6个子类，如下所示：

image.png

该类内容较多，不一一例举，需要用到的时候可以查Android SDK。Android10？

WifiInfo类

image.png

该类可以获得已经建立的或处于活动状态的wifi网络的状态信息。常用方法如下：

image.png

image.png

代码：

mWifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE);     
mWifiInfo = mWifiManager.getConnectionInfo();  
if(null != mWifiInfo && null != mWifiInfo.getSSID()){  String info = "getSSID()="+mWifiInfo.getSSID()+"\n"  +"getBSSID()="+mWifiInfo.getBSSID()+"\n"  +"getHiddenSSID()="+mWifiInfo.getHiddenSSID()+"\n"  +"getLinkSpeed()="+mWifiInfo.getLinkSpeed()+"\n"  +"getMacAddress()="+mWifiInfo.getMacAddress()+"\n"  +"getNetworkId()="+mWifiInfo.getNetworkId()+"\n"  +"getRssi()="+mWifiInfo.getRssi()+"\n"  +"getSupplicantState()="+mWifiInfo.getSupplicantState()+"\n"  +"getDetailedStateOf()="+mWifiInfo.getDetailedStateOf(mWifiInfo.getSupplicantState());  mTVWifiInfo.setText(info);  
}else {  mTVWifiInfo.setText("没有连接到wifi");  
}

WifiManager类

该类用于管理Wifi连接，定义了许多常量和方法，这里就不一一说了。

常用方法。

20160304133401314.jpg

需要指出的是getWifiState()方法是反悔wifi的状态，有整型常量表示，

image.png

四、Android WiFi开发 （二）Wifi热点

这个章节主要说一下手机开启Wifi热点。

demo的下载地址会在最下面贴出来。WiFi开发，

image.png

1、创建WiFi热点

经测试开启wifi热点（无秘密，wpa安全类型，wpa2安全类型）都可以正常开启并使用。

需要注意的是wifi和wifi热点不能同时打开，也就是连接wifi的时候，开启热点需要先将wifi关闭才可以。

用到的主要代码：

package com.vn.wifitest.utils;  import java.lang.reflect.InvocationTargetException;  
import java.lang.reflect.Method;  
import android.content.BroadcastReceiver;  
import android.content.Context;  
import android.content.Intent;  
import android.content.IntentFilter;  
import android.net.wifi.WifiConfiguration;  
import android.net.wifi.WifiConfiguration.KeyMgmt;  
import android.net.wifi.WifiManager;  
import android.os.Handler;  
import android.util.Log;  public class WifiAPUtil {  private static final String TAG = "WifiAPUtil";  public final static boolean DEBUG = true;  public static final int MESSAGE_AP_STATE_ENABLED = 1;  public static final int MESSAGE_AP_STATE_FAILED = 2;  //默认wifi秘密  private static final String DEFAULT_AP_PASSWORD = "12345678";     private static WifiAPUtil sInstance;  private static Handler mHandler;  private static Context mContext;  private WifiManager mWifiManager;  //监听wifi热点的状态变化  public static final String WIFI_AP_STATE_CHANGED_ACTION = "android.net.wifi.WIFI_AP_STATE_CHANGED";  public static final String EXTRA_WIFI_AP_STATE = "wifi_state";  public static int WIFI_AP_STATE_DISABLING = 10;  public static int WIFI_AP_STATE_DISABLED = 11;  public static int WIFI_AP_STATE_ENABLING = 12;  public static int WIFI_AP_STATE_ENABLED = 13;  public static int WIFI_AP_STATE_FAILED = 14;  public enum WifiSecurityType {  WIFICIPHER_NOPASS, WIFICIPHER_WPA, WIFICIPHER_WEP, WIFICIPHER_INVALID, WIFICIPHER_WPA2  }  private WifiAPUtil(Context context) {  if(DEBUG) Log.d(TAG,"WifiAPUtils construct");   mContext = context;  mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);  IntentFilter filter = new IntentFilter();  filter.addAction(WIFI_AP_STATE_CHANGED_ACTION);  context.registerReceiver(mWifiStateBroadcastReceiver, filter);  }  protected void finalize() {  if(DEBUG) Log.d(TAG,"finalize");  mContext.unregisterReceiver(mWifiStateBroadcastReceiver);  }  public static WifiAPUtil getInstance(Context c) {  if (null == sInstance)  sInstance = new WifiAPUtil(c);  return sInstance;  }  public boolean turnOnWifiAp(String str, String password,WifiSecurityType Type) {  String ssid = str;  //配置热点信息。  WifiConfiguration wcfg = new WifiConfiguration();  wcfg.SSID = new String(ssid);  wcfg.networkId = 1;  wcfg.allowedAuthAlgorithms.clear();  wcfg.allowedGroupCiphers.clear();  wcfg.allowedKeyManagement.clear();  wcfg.allowedPairwiseCiphers.clear();  wcfg.allowedProtocols.clear();  if(Type == WifiSecurityType.WIFICIPHER_NOPASS) {  if(DEBUG)Log.d(TAG, "wifi ap----no password");  wcfg.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN, true);  wcfg.wepKeys[0] = "";      wcfg.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);      wcfg.wepTxKeyIndex = 0;  } else if(Type == WifiSecurityType.WIFICIPHER_WPA) {  if(DEBUG)Log.d(TAG, "wifi ap----wpa");  //密码至少8位，否则使用默认密码  if(null != password && password.length() >= 8){  wcfg.preSharedKey = password;  } else {  wcfg.preSharedKey = DEFAULT_AP_PASSWORD;  }  wcfg.hiddenSSID = false;         wcfg.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);         wcfg.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);                               wcfg.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);       //wcfg.allowedKeyManagement.set(4);  wcfg.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);                          wcfg.allowedProtocols.set(WifiConfiguration.Protocol.WPA);        wcfg.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);      wcfg.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);      } else if(Type == WifiSecurityType.WIFICIPHER_WPA2) {  if(DEBUG)Log.d(TAG, "wifi ap---- wpa2");  //密码至少8位，否则使用默认密码  if(null != password && password.length() >= 8){  wcfg.preSharedKey = password;  } else {  wcfg.preSharedKey = DEFAULT_AP_PASSWORD;  }       wcfg.hiddenSSID = true;         wcfg.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);         wcfg.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);                               wcfg.allowedKeyManagement.set(4);       //wcfg.allowedKeyManagement.set(4);  wcfg.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);                          wcfg.allowedProtocols.set(WifiConfiguration.Protocol.WPA);        wcfg.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);      wcfg.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);      }         try {  Method method = mWifiManager.getClass().getMethod("setWifiApConfiguration",   wcfg.getClass());  Boolean rt = (Boolean)method.invoke(mWifiManager, wcfg);  if(DEBUG) Log.d(TAG, " rt = " + rt);  } catch (NoSuchMethodException e) {  Log.e(TAG, e.getMessage());  } catch (IllegalArgumentException e) {  Log.e(TAG, e.getMessage());  } catch (IllegalAccessException e) {  Log.e(TAG, e.getMessage());  } catch (InvocationTargetException e) {  Log.e(TAG, e.getMessage());  }  return setWifiApEnabled();  }  //获取热点状态      public int getWifiAPState() {  int state = -1;  try {  Method method2 = mWifiManager.getClass().getMethod("getWifiApState");  state = (Integer) method2.invoke(mWifiManager);  } catch (Exception e) {  Log.e(TAG, e.getMessage());  }  if(DEBUG)Log.i("WifiAP", "getWifiAPState.state " + state);  return state;  }  private boolean setWifiApEnabled() {          //开启wifi热点需要关闭wifi  while(mWifiManager.getWifiState() != WifiManager.WIFI_STATE_DISABLED){  mWifiManager.setWifiEnabled(false);  try {  Thread.sleep(200);  } catch (Exception e) {  Log.e(TAG, e.getMessage());  return false;  }  }  // 确保wifi 热点关闭。  while(getWifiAPState() != WIFI_AP_STATE_DISABLED){  try {  Method method1 = mWifiManager.getClass().getMethod("setWifiApEnabled",  WifiConfiguration.class, boolean.class);  method1.invoke(mWifiManager, null, false);  Thread.sleep(200);  } catch (Exception e) {  Log.e(TAG, e.getMessage());  return false;  }  }  //开启wifi热点  try {  Method method1 = mWifiManager.getClass().getMethod("setWifiApEnabled",  WifiConfiguration.class, boolean.class);  method1.invoke(mWifiManager, null, true);         Thread.sleep(200);  } catch (Exception e) {  Log.e(TAG, e.getMessage());  return false;  }  return true;  }     //关闭WiFi热点     public void closeWifiAp() {          if (getWifiAPState() != WIFI_AP_STATE_DISABLED) {      try {      Method method = mWifiManager.getClass().getMethod("getWifiApConfiguration");      method.setAccessible(true);      WifiConfiguration config = (WifiConfiguration) method.invoke(mWifiManager);      Method method2 = mWifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);      method2.invoke(mWifiManager, config, false);      } catch (NoSuchMethodException e) {      e.printStackTrace();      } catch (IllegalArgumentException e) {      e.printStackTrace();      } catch (IllegalAccessException e) {      e.printStackTrace();      } catch (InvocationTargetException e) {      e.printStackTrace();      }      }     }    public void regitsterHandler(Handler handler){  mHandler = handler;  }  public void unregitsterHandler(){  mHandler = null;  }  //监听wifi热点状态变化  private BroadcastReceiver mWifiStateBroadcastReceiver = new BroadcastReceiver() {             @Override  public void onReceive(Context context, Intent intent) {  if(DEBUG)Log.i(TAG,"WifiAPUtils onReceive: "+intent.getAction());  if(WIFI_AP_STATE_CHANGED_ACTION.equals(intent.getAction())) {  int cstate = intent.getIntExtra(EXTRA_WIFI_AP_STATE, -1);  if(cstate == WIFI_AP_STATE_ENABLED) {  if(mHandler != null){  mHandler.sendEmptyMessage(MESSAGE_AP_STATE_ENABLED);                  }  }if(cstate == WIFI_AP_STATE_DISABLED  || cstate == WIFI_AP_STATE_FAILED) {  if(mHandler != null)  mHandler.sendEmptyMessage(MESSAGE_AP_STATE_FAILED);  }  }  }  };  //获取热点ssid  public String getValidApSsid() {  try {  Method method = mWifiManager.getClass().getMethod("getWifiApConfiguration");  WifiConfiguration configuration = (WifiConfiguration)method.invoke(mWifiManager);  return configuration.SSID;    } catch (Exception e) {  Log.e(TAG, e.getMessage());  return null;  }  }  //获取热点密码  public String getValidPassword(){  try {  Method method = mWifiManager.getClass().getMethod("getWifiApConfiguration");  WifiConfiguration configuration = (WifiConfiguration)method.invoke(mWifiManager);  return configuration.preSharedKey;    } catch (Exception e) {  Log.e(TAG, e.getMessage());  return null;  }  }  //获取热点安全类型  public int getValidSecurity(){  WifiConfiguration configuration;  try {  Method method = mWifiManager.getClass().getMethod("getWifiApConfiguration");  configuration = (WifiConfiguration)method.invoke(mWifiManager);  } catch (Exception e) {  Log.e(TAG, e.getMessage());  return WifiSecurityType.WIFICIPHER_INVALID.ordinal();  }  if(DEBUG)Log.i(TAG,"getSecurity security="+configuration.allowedKeyManagement);  if(configuration.allowedKeyManagement.get(KeyMgmt.NONE)) {  return WifiSecurityType.WIFICIPHER_NOPASS.ordinal();  }else if(configuration.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {  return WifiSecurityType.WIFICIPHER_WPA.ordinal();  }else if(configuration.allowedKeyManagement.get(4)) { //4 means WPA2_PSK   return WifiSecurityType.WIFICIPHER_WPA2.ordinal();  }  return WifiSecurityType.WIFICIPHER_INVALID.ordinal();  }  
}

使用方法：

使用方法：

//初始化WifiAPUtil类  
WifiAPUtil.getInstance(getApplicationContext())  
//注册handler  
WifiAPUtil.getInstance(this).regitsterHandler(mHandler);  
//接收message，做处理  
private Handler mHandler = new Handler(){  public void handleMessage(Message msg) {  switch (msg.what) {  case WifiAPUtil.MESSAGE_AP_STATE_ENABLED:  String ssid = WifiAPUtil.getInstance(WifiApActivity.this).getValidApSsid();  String pw = WifiAPUtil.getInstance(WifiApActivity.this).getValidPassword();  int security = WifiAPUtil.getInstance(WifiApActivity.this).getValidSecurity();  mWifiApState.setText("wifi热点开启成功"+"\n"  +"SSID = "+ssid+"\n"  +"Password = "+pw +"\n"  +"Security = "+security);  break;  case WifiAPUtil.MESSAGE_AP_STATE_FAILED:  mWifiApState.setText("wifi热点关闭");  break;  default:  break;  }  }  
};

在activity销毁的时候

@Override  
protected void onDestroy() {  super.onDestroy();  WifiAPUtil.getInstance(this).unregitsterHandler();  
}

添加点击事件

//开启wifi热点  
WifiAPUtil.getInstance(WifiApActivity.this).turnOnWifiAp(ssid, password, mWifiType);
//关闭wifi热点  
WifiAPUtil.getInstance(WifiApActivity.this).closeWifiAp();

2、监听热点的状态

当wifi热点状态发送变化，系统会发送广播 Android.net.wifi.WIFI_AP_STATE_CHANGED，所以我们只要注册监听这个广播就可以了。开发版路由器、

wifi ap状态值。

public static final String EXTRA_WIFI_AP_STATE = "wifi_state";  
public static int WIFI_AP_STATE_DISABLING = 10;  
public static int WIFI_AP_STATE_DISABLED = 11;  
public static int WIFI_AP_STATE_ENABLING = 12;  
public static int WIFI_AP_STATE_ENABLED = 13;  
public static int WIFI_AP_STATE_FAILED = 14;

动态注册

public static final String WIFI_AP_STATE_CHANGED_ACTION = "android.net.wifi.WIFI_AP_STATE_CHANGED";  
//注册广播接收者  
IntentFilter filter = new IntentFilter();  
filter.addAction(WIFI_AP_STATE_CHANGED_ACTION);  
context.registerReceiver(mWifiStateBroadcastReceiver, filter);

广播接收者

通过监听wifiap状态的变化，发送消息给相关activity

//监听wifi热点状态变化  
private BroadcastReceiver mWifiStateBroadcastReceiver = new BroadcastReceiver() {             @Override  public void onReceive(Context context, Intent intent) {  if(DEBUG)Log.i(TAG,"WifiAPUtils onReceive: "+intent.getAction());  if(WIFI_AP_STATE_CHANGED_ACTION.equals(intent.getAction())) {  int cstate = intent.getIntExtra(EXTRA_WIFI_AP_STATE, -1);  if(cstate == WIFI_AP_STATE_ENABLED) {  if(mHandler != null){  mHandler.sendEmptyMessage(MESSAGE_AP_STATE_ENABLED);                  }  }if(cstate == WIFI_AP_STATE_DISABLED  || cstate == WIFI_AP_STATE_FAILED) {  if(mHandler != null)  mHandler.sendEmptyMessage(MESSAGE_AP_STATE_FAILED);  }  }  }  
};

3、遗留问题

在配置wificonfiguration的时候有过属性是hiddenSSID，这个是设置wifi热点AP是否隐藏的，

但是设置wcfg.hiddenSSID = true或false并没有发现有什么不同，按理说设置为true，ssid隐藏应该搜索不到这个热点，

但是都可以搜索到。还请知道的可以留言指教，十分感谢。

之前有朋友说5.0系统的开启热点有问题，我这里没有5.0的手机，使用华为p9Android6.0手机测试确实开启不了热点，需要添加write_settings，添加上此权限就可以成功开启了。

五、其他补充

没有

注：本文著作权归作者，由demo大师（http://www.demodashi.com）宣传，拒绝转载，转载需要作者授权


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标签：小米路由器4开发版android open source projectwifi模块开发Android10WiFi开发开发版路由器android开发应用语言安卓手机wifi
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