Android 连接Wifi和创建Wifi热点的实例
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本文实例讲述了连接Wifi和创建Wifi热点的方法。分享给大家供大家参考，具体如下：
android的热点功能不可见，用了反射的技术搞定之外。
Eclipse设置语言为utf-8才能查看中文注释
上代码：
MainActivity.java
package com.widget.hotspot;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
public class MainActivity extends Activity {
public static final String TAG = "MainActivity";
private Button mBtn1, mBtn2;
private WifiAdmin mWifiAdmin;
private Context mContext = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mContext = this;
setContentView(R.layout.activity_main);
mBtn1 = (Button)findViewById(R.id.button1);
mBtn2 = (Button)findViewById(R.id.button2);
mBtn1.setText("点击连接Wifi");
mBtn2.setText("点击创建Wifi热点");
mBtn1.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
mWifiAdmin = new WifiAdmin(mContext) {
@Override
public void myUnregisterReceiver(BroadcastReceiver receiver) {
// TODO Auto-generated method stub
MainActivity.this.unregisterReceiver(receiver);
}
@Override
public Intent myRegisterReceiver(BroadcastReceiver receiver,
IntentFilter filter) {
// TODO Auto-generated method stub
MainActivity.this.registerReceiver(receiver, filter);
return null;
}
@Override
public void onNotifyWifiConnected() {
// TODO Auto-generated method stub
Log.v(TAG, "have connected success!");
Log.v(TAG, "###############################");
}
@Override
public void onNotifyWifiConnectFailed() {
// TODO Auto-generated method stub
Log.v(TAG, "have connected failed!");
Log.v(TAG, "###############################");
}
};
mWifiAdmin.openWifi();
mWifiAdmin.addNetwork(mWifiAdmin.createWifiInfo("YOU_WIFI", "MM123456", WifiAdmin.TYPE_WPA));
}
});
mBtn2.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
WifiApAdmin wifiAp = new WifiApAdmin(mContext);
wifiAp.startWifiAp("\"HotSpot\"", "hhhhhh123");
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void onResume() {
super.onResume();
Log.d("Rssi", "Registered");
}
@Override
public void onPause() {
super.onPause();
Log.d("Rssi", "Unregistered");
}
}
WifiAdmin.java
package com.widget.hotspot;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.NetworkInfo.DetailedState;
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.util.Log;
public abstract class WifiAdmin {
private static final String TAG = "WifiAdmin";
private WifiManager mWifiManager;
private WifiInfo mWifiInfo;
// 扫描出的网络连接列表
private List<ScanResult> mWifiList;
private List<WifiConfiguration> mWifiConfiguration;
private WifiLock mWifiLock;
private String mPasswd = "";
private String mSSID = "";
private Context mContext = null;
public WifiAdmin(Context context) {
mContext = context;
// 取得WifiManager对象
mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
// 取得WifiInfo对象
mWifiInfo = mWifiManager.getConnectionInfo();
Log.v(TAG, "getIpAddress = " + mWifiInfo.getIpAddress());
}
// 打开WIFI
public void openWifi() {
if (!mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(true);
}
}
// 关闭WIFI
public void closeWifi() {
if (mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(false);
}
}
public abstract Intent myRegisterReceiver(BroadcastReceiver receiver, IntentFilter filter);
public abstract void myUnregisterReceiver(BroadcastReceiver receiver);
public abstract void onNotifyWifiConnected();
public abstract void onNotifyWifiConnectFailed();
// 添加一个网络并连接
public void addNetwork(WifiConfiguration wcg) {
register();
WifiApAdmin.closeWifiAp(mContext);
int wcgID = mWifiManager.addNetwork(wcg);
boolean b = mWifiManager.enableNetwork(wcgID, true);
}
public static final int TYPE_NO_PASSWD = 0x11;
public static final int TYPE_WEP = 0x12;
public static final int TYPE_WPA = 0x13;
public void addNetwork(String ssid, String passwd, int type) {
if (ssid == null || passwd == null || ssid.equals("")) {
Log.e(TAG, "addNetwork() ## nullpointer error!");
return;
}
if (type != TYPE_NO_PASSWD && type != TYPE_WEP && type != TYPE_WPA) {
Log.e(TAG, "addNetwork() ## unknown type = " + type);
}
stopTimer();
unRegister();
addNetwork(createWifiInfo(ssid, passwd, type));
}
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
if (intent.getAction().equals(WifiManager.RSSI_CHANGED_ACTION)) {
Log.d(TAG, "RSSI changed");
//有可能是正在获取，或者已经获取了
Log.d(TAG, " intent is " + WifiManager.RSSI_CHANGED_ACTION);
if (isWifiContected(mContext) == WIFI_CONNECTED) {
stopTimer();
onNotifyWifiConnected();
unRegister();
} else if (isWifiContected(mContext) == WIFI_CONNECT_FAILED) {
stopTimer();
closeWifi();
onNotifyWifiConnectFailed();
unRegister();
} else if (isWifiContected(mContext) == WIFI_CONNECTING) {
}
}
}
};
private final int STATE_REGISTRING = 0x01;
private final int STATE_REGISTERED = 0x02;
private final int STATE_UNREGISTERING = 0x03;
private final int STATE_UNREGISTERED = 0x04;
private int mHaveRegister = STATE_UNREGISTERED;
private synchronized void register() {
Log.v(TAG, "register() ##mHaveRegister = " + mHaveRegister);
if (mHaveRegister == STATE_REGISTRING
|| mHaveRegister == STATE_REGISTERED) {
return ;
}
mHaveRegister = STATE_REGISTRING;
myRegisterReceiver(mBroadcastReceiver, new IntentFilter(WifiManager.RSSI_CHANGED_ACTION));
mHaveRegister = STATE_REGISTERED;
startTimer();
}
private synchronized void unRegister() {
Log.v(TAG, "unRegister() ##mHaveRegister = " + mHaveRegister);
if (mHaveRegister == STATE_UNREGISTERED
|| mHaveRegister == STATE_UNREGISTERING) {
return ;
}
mHaveRegister = STATE_UNREGISTERING;
myUnregisterReceiver(mBroadcastReceiver);
mHaveRegister = STATE_UNREGISTERED;
}
private Timer mTimer = null;
private void startTimer() {
if (mTimer != null) {
stopTimer();
}
mTimer = new Timer(true);
// mTimer.schedule(mTimerTask, 0, 20 * 1000);// 20s
mTimer.schedule(mTimerTask, 30 * 1000);
}
private TimerTask mTimerTask = new TimerTask() {
@Override
public void run() {
// TODO Auto-generated method stub
Log.e(TAG, "timer out!");
onNotifyWifiConnectFailed();
unRegister();
}
};
private void stopTimer() {
if (mTimer != null) {
mTimer.cancel();
mTimer = null;
}
}
@Override
protected void finalize() {
try {
super.finalize();
unRegister();
} catch (Throwable e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public WifiConfiguration createWifiInfo(String SSID, String password, int type) {
Log.v(TAG, "SSID = " + SSID + "## Password = " + password + "## Type = " + 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);
}
// 分为三种情况：1没有密码2用wep加密3用wpa加密
if (type == TYPE_NO_PASSWD) {// WIFICIPHER_NOPASS
config.wepKeys[0] = "";
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
} else if (type == TYPE_WEP) { // 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;
} else if (type == TYPE_WPA) { // 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;
}
public static final int WIFI_CONNECTED = 0x01;
public static final int WIFI_CONNECT_FAILED = 0x02;
public static final int WIFI_CONNECTING = 0x03;
public int isWifiContected(Context context) {
ConnectivityManager connectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifiNetworkInfo = connectivityManager
.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
Log.v(TAG, "isConnectedOrConnecting = " + wifiNetworkInfo.isConnectedOrConnecting());
Log.d(TAG, "wifiNetworkInfo.getDetailedState() = " + wifiNetworkInfo.getDetailedState());
if (wifiNetworkInfo.getDetailedState() == DetailedState.OBTAINING_IPADDR
|| wifiNetworkInfo.getDetailedState() == DetailedState.CONNECTING) {
return WIFI_CONNECTING;
} else if (wifiNetworkInfo.getDetailedState() == DetailedState.CONNECTED) {
return WIFI_CONNECTED;
} else {
Log.d(TAG, "getDetailedState() == " + wifiNetworkInfo.getDetailedState());
return WIFI_CONNECT_FAILED;
}
}
private WifiConfiguration IsExsits(String SSID) {
List<WifiConfiguration> existingConfigs = mWifiManager.getConfiguredNetworks();
for (WifiConfiguration existingConfig : existingConfigs) {
if (existingConfig.SSID.equals("\"" + SSID + "\"") ) {
return existingConfig;
}
}
return null;
}
// 断开指定ID的网络
public void disconnectWifi(int netId) {
mWifiManager.disableNetwork(netId);
mWifiManager.disconnect();
}
// 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();
mWifiList = mWifiManager.getScanResults();
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();
}
}
WifiApAdmin.java
package com.widget.hotspot;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.util.Log;
public class WifiApAdmin {
public static final String TAG = "WifiApAdmin";
public static void closeWifiAp(Context context) {
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
closeWifiAp(wifiManager);
}
private WifiManager mWifiManager = null;
private Context mContext = null;
public WifiApAdmin(Context context) {
mContext = context;
mWifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
closeWifiAp(mWifiManager);
}
private String mSSID = "";
private String mPasswd = "";
public void startWifiAp(String ssid, String passwd) {
mSSID = ssid;
mPasswd = passwd;
if (mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(false);
}
stratWifiAp();
MyTimerCheck timerCheck = new MyTimerCheck() {
@Override
public void doTimerCheckWork() {
// TODO Auto-generated method stub
if (isWifiApEnabled(mWifiManager)) {
Log.v(TAG, "Wifi enabled success!");
this.exit();
} else {
Log.v(TAG, "Wifi enabled failed!");
}
}
@Override
public void doTimeOutWork() {
// TODO Auto-generated method stub
this.exit();
}
};
timerCheck.start(15, 1000);
}
public void stratWifiAp() {
Method method1 = null;
try {
method1 = mWifiManager.getClass().getMethod("setWifiApEnabled",
WifiConfiguration.class, boolean.class);
WifiConfiguration netConfig = new WifiConfiguration();
netConfig.SSID = mSSID;
netConfig.preSharedKey = mPasswd;
netConfig.allowedAuthAlgorithms
.set(WifiConfiguration.AuthAlgorithm.OPEN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
netConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
netConfig.allowedKeyManagement
.set(WifiConfiguration.KeyMgmt.WPA_PSK);
netConfig.allowedPairwiseCiphers
.set(WifiConfiguration.PairwiseCipher.CCMP);
netConfig.allowedPairwiseCiphers
.set(WifiConfiguration.PairwiseCipher.TKIP);
netConfig.allowedGroupCiphers
.set(WifiConfiguration.GroupCipher.CCMP);
netConfig.allowedGroupCiphers
.set(WifiConfiguration.GroupCipher.TKIP);
method1.invoke(mWifiManager, netConfig, true);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static void closeWifiAp(WifiManager wifiManager) {
if (isWifiApEnabled(wifiManager)) {
try {
Method method = wifiManager.getClass().getMethod("getWifiApConfiguration");
method.setAccessible(true);
WifiConfiguration config = (WifiConfiguration) method.invoke(wifiManager);
Method method2 = wifiManager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
method2.invoke(wifiManager, config, false);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private static boolean isWifiApEnabled(WifiManager wifiManager) {
try {
Method method = wifiManager.getClass().getMethod("isWifiApEnabled");
method.setAccessible(true);
return (Boolean) method.invoke(wifiManager);
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
}
MyTimeCheck.java
package com.widget.hotspot;
public abstract class MyTimerCheck {
private int mCount = 0;
private int mTimeOutCount = 1;
private int mSleepTime = 1000; // 1s
private boolean mExitFlag = false;
private Thread mThread = null;
public abstract void doTimerCheckWork();
public abstract void doTimeOutWork();
public MyTimerCheck() {
mThread = new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
while (!mExitFlag) {
mCount++;
if (mCount < mTimeOutCount) {
doTimerCheckWork();
try {
mThread.sleep(mSleepTime);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
exit();
}
} else {
doTimeOutWork();
}
}
}
});
}
public void start(int timeOutCount, int sleepTime) {
mTimeOutCount = timeOutCount;
mSleepTime = sleepTime;
mThread.start();
}
public void exit() {
mExitFlag = true;
}
}
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