做網絡診斷，需要診斷當前wifi所在信道是否擁擠，目前只是解決了獲取當前wifi所在信道，主要是用ScanResult 的frequency字段，還需要用SSID和BSSID從ScanResults匹配到當前的wifi信號wifiInfo，具體代碼如下：

public static int getCurrentChannel(Context context) {

WifiManager wifiManager = (WifiManager) context

.getSystemService(Context.WIFI_SERVICE);

WifiInfo wifiInfo = wifiManager.getConnectionInfo();// 當前wifi連接信息

List scanResults = wifiManager.getScanResults();

for (ScanResult result : scanResults) {

if (result.BSSID.equalsIgnoreCase(wifiInfo.getBSSID())

&& result.SSID.equalsIgnoreCase(wifiInfo.getSSID()

.substring(1, wifiInfo.getSSID().length() - 1))) {

return getChannelByFrequency(result.frequency);

}

}

return -1;

}

/**

* 根據頻率獲得信道

*

* @param frequency

* @return

*/

public static int getChannelByFrequency(int frequency) {

int channel = -1;

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;

case 5745:

channel = 149;

break;

case 5765:

channel = 153;

break;

case 5785:

channel = 157;

break;

case 5805:

channel = 161;

break;

case 5825:

channel = 165;

break;

}

return channel;

}

總結

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