android代码设置、打开WLAN wifi热点及热点的连接

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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>"

<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>