android 获取wifi 信号质量

转于：http://yidongkaifa.iteye.com/blog/1780456

 

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int strength = WifiManager.calculateSignalLevel(info.getRssi(), 5);即信号强度。

 

获取方法：

private String obtainWifiInfo() {

// Wifi的连接速度及信号强度：

WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);

// WifiInfo wifiInfo = wifiManager.getConnectionInfo();

WifiInfo info = wifiManager.getConnectionInfo();

if (info.getBSSID() != null) {

// 链接信号强度

int strength = WifiManager.calculateSignalLevel(info.getRssi(), 5);

// 链接速度

int speed = info.getLinkSpeed();

// 链接速度单位

String units = WifiInfo.LINK_SPEED_UNITS;

// Wifi源名称

String ssid = info.getSSID();

}

return info.toString();

}

 

//////////////////////////// wifi 信号变化 ：

注册 receiver,

 

public BroadcastReceiver rssiReceiver = new BroadcastReceiver() {

 

@Override

public void onReceive(Context context, Intent intent) {

// TODO Auto-generated method stub

Log.d("Rssi", "RSSI changed");

// wifiInfo.setText(obtainWifiInfo());

 

}

};

@Override

public void onResume() {

super.onResume();

registerReceiver(rssiReceiver, new IntentFilter(WifiManager.RSSI_CHANGED_ACTION));

 

Log.d("Rssi", "Registered");

}

 

@Override

public void onPause() {

super.onPause();

 

unregisterReceiver(rssiReceiver);

Log.d("Rssi", "Unregistered");

}