Android获取WIFI信号强度

1. 利用Android下的WifiManager获取可见的SSID

WifiManager wifiMg = (WifiManager)act.getSystemService(act.WIFI_SERVICE);
			
			 List<ScanResult> list = wifiMg.getScanResults();

然后对ScanResult里的每个值进行枚举，ScanResult里的是一个level，需要进行转换

全部代码如下:

public static void CheckTimes(final Activity act)
	{
		try {
			WifiManager wifiMg = (WifiManager)act.getSystemService(act.WIFI_SERVICE);
			
			 List<ScanResult> list = wifiMg.getScanResults();
			if (list != null) {
				Log.d(TAG_LOG, "list size : " + list.size());
				if (list != null) {
					for (ScanResult scanResult : list) {
						int nSigLevel = WifiManager.calculateSignalLevel(
								scanResult.level, 100);
						Log.d(TAG_LOG, "SSID:" + scanResult.SSID + "    强度:"
								+ scanResult.level + "-" + nSigLevel);
					}
				}
				
				WifiInfo wifiInfo = wifiMg.getConnectionInfo();
				int nWSig = WifiManager.calculateSignalLevel(wifiInfo.getRssi(), 100);
				Log.d(TAG_LOG, "new SSID : " + wifiInfo.getSSID() + "   signal strength : "+wifiInfo.getRssi() + "   强度:" + nWSig);
			}else
			{
				Log.d(TAG_LOG, "list is null");
			}
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}