wifi信道，相信也有朋友对如何获取wifi信道感到困惑.

/**
* 根据频率获得信道
* @param frequency 通过 wifimanager获取
* @return
*/
public static int getChannel(int frequency)
{
int channel = 0;
switch(frequency){
case 2412:
channel = 1;
break;
case 2417:
channel = 2;
break;
case 2422:
channel = 3;
break;
case 2427:
channel = 4;
break;
case 2432:
channel = 5;
break;
case 2437:
channel = 6;
break;
case 2442:
channel = 7;
break;
case 2447:
channel = 8;
break;
case 2452:
channel = 9;
break;
case 2457:
channel = 10;
break;
case 2462:
channel = 11;
break;
case 2467:
channel = 12;
break;
case 2472:
channel = 13;
break;
case 2484:
channel = 14;
break;
}
return channel;
}