其实创建热点很简单,先获取到wifi的服务,再配置热点名称、密码等等,然后再通过反射打开它就OK了。
下面我们看看创建热点的代码实现:
这一段是开启WLAN热点,并可以指定好它的热点名和密码
支行后,这一段程序可以开启WLAN和同时自动关闭WIFI。
package com.tel.lajoin.wifi.hotspot; import java.lang.reflect.Method; import android.app.Activity; import android.content.Context; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiManager; import android.os.Bundle; import android.view.View; import android.widget.Button; public class HotspotActivity extends Activity { private WifiManager wifiManager; private Button open; private boolean flag=false; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.main); //获取wifi管理服务 wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); open=(Button)findViewById(R.id.open_hotspot); //通过按钮事件设置热点 open.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //如果是打开状态就关闭,如果是关闭就打开 flag=!flag; setWifiApEnabled(flag); } }); } // wifi热点开关 public boolean setWifiApEnabled(boolean enabled) { if (enabled) { // disable WiFi in any case //wifi和热点不能同时打开,所以打开热点的时候需要关闭wifi wifiManager.setWifiEnabled(false); } try { //热点的配置类 WifiConfiguration apConfig = new WifiConfiguration(); //配置热点的名称(可以在名字后面加点随机数什么的) apConfig.SSID = "YRCCONNECTION"; //配置热点的密码 apConfig.preSharedKey="12122112"; //通过反射调用设置热点 Method method = wifiManager.getClass().getMethod( "setWifiApEnabled", WifiConfiguration.class, Boolean.TYPE); //返回热点打开状态 return (Boolean) method.invoke(wifiManager, apConfig, enabled); } catch (Exception e) { return false; } } }
下在一段是,去连一个WLAN热点
package com.tel.lajoin.wifiscan; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.net.wifi.ScanResult; import android.net.wifi.WifiConfiguration; import android.net.wifi.WifiManager; import android.os.Bundle; public class MainActivity extends Activity { private List<ScanResult> wifiList; private WifiManager wifiManager; private List<String> passableHotsPot; private WifiReceiver wifiReceiver; private boolean isConnected=false; private Button connect; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); init(); } /* 初始化参数 */ public void init() { setContentView(R.layout.main); connect=(Button)findViewById(R.id.connect); wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); wifiReceiver = new WifiReceiver(); //通过按钮事件搜索热点 connect.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { wifiManager.startScan(); } }); } /* 监听热点变化 */ private final class WifiReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { wifiList = wifiManager.getScanResults(); if (wifiList == null || wifiList.size() == 0 || isConnected) return; onReceiveNewNetworks(wifiList); } } /*当搜索到新的wifi热点时判断该热点是否符合规格*/ public void onReceiveNewNetworks(List<ScanResult> wifiList){ passableHotsPot=new ArrayList<String>(); for(ScanResult result:wifiList){ System.out.println(result.SSID); if((result.SSID).contains("YRCCONNECTION")) passableHotsPot.add(result.SSID); } synchronized (this) { connectToHotpot(); } } /*连接到热点*/ public void connectToHotpot(){ if(passableHotsPot==null || passableHotsPot.size()==0) return; WifiConfiguration wifiConfig=this.setWifiParams(passableHotsPot.get(0)); int wcgID = wifiManager.addNetwork(wifiConfig); boolean flag=wifiManager.enableNetwork(wcgID, true); isConnected=flag; System.out.println("connect success? "+flag); } /*设置要连接的热点的参数*/ public WifiConfiguration setWifiParams(String ssid){ WifiConfiguration apConfig=new WifiConfiguration(); apConfig.SSID="""+ssid+"""; apConfig.preSharedKey=""12122112""; apConfig.hiddenSSID = true; apConfig.status = WifiConfiguration.Status.ENABLED; apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP); apConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP); apConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK); apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP); apConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP); apConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN); return apConfig; } @Override protected void onDestroy() { super.onDestroy(); /*销毁时注销广播*/ unregisterReceiver(wifiReceiver); } }
当然,如果要运行起来,还要在MANIFEST.XML中设定好定义的ACTIVITY类。以及相应的LAYOUT文件和R文件的生成。
还有配置权限。
<uses-permission android:name="android.permission.INTERNET"></uses-permission> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" ></uses-permission>" <!-- 设置允许改变配置信息的权�?--> <uses-permission android:name="android.permission.CHANGE_CONFIGURATION" /> <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>