android 信号强度变化 Android监听WIFI网络的变化并且获得当前信号强度

MainActivity如下:

package cc.testwifi;

import android.os.Bundle;

import android.app.Activity;

/**

* Demo描述:

* 监听Wifi网络的变化并且获得当前信号强度

*

*

*/

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

}

}

WifiChangeBroadcastReceiver如下:

package cc.testwifi;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import .wifi.WifiInfo;

import .wifi.WifiManager;

public class WifiChangeBroadcastReceiver extends BroadcastReceiver {

private Context mContext;

@Override

public void onReceive(Context context, Intent intent) {

mContext=context;

System.out.println("Wifi发生变化");

getWifiInfo();

}

private void getWifiInfo() {

WifiManager wifiManager = (WifiManager) mContext.getSystemService(mContext.WIFI_SERVICE);

WifiInfo wifiInfo = wifiManager.getConnectionInfo();

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

//wifi名称

String ssid = wifiInfo.getSSID();

//wifi信号强度

int signalLevel = WifiManager.calculateSignalLevel(wifiInfo.getRssi(), 5);

//wifi速度

int speed = wifiInfo.getLinkSpeed();

//wifi速度单位

String units = WifiInfo.LINK_SPEED_UNITS;

System.out.println("ssid="+ssid+",signalLevel="+signalLevel+",speed="+speed+",units="+units);

}

}

}

AndroidManifest.xml如下:

main.xml如下: