Android监听WIFI网络的变化并且获得当前信号强度
16lz
2021-01-24
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 * * 参考资料: * http://blog.csdn.net/way_ping_li/article/details/8777478 * Thank you very much * */public class MainActivity extends Activity {@Overrideprotected 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 android.net.wifi.WifiInfo;import android.net.wifi.WifiManager;public class WifiChangeBroadcastReceiver extends BroadcastReceiver {private Context mContext;@Overridepublic 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:
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="cc.testwifi" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="10" android:targetSdkVersion="10" /> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="cc.testwifi.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <receiver android:name="cc.testwifi.WifiChangeBroadcastReceiver"> <intent-filter > <action android:name="android.net.wifi.RSSI_CHANGED" /> </intent-filter> </receiver> </application></manifest>
main.xml如下:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="监听wifi变化并获得当前信号强度" android:layout_centerHorizontal="true" android:layout_marginTop="50dip" /></RelativeLayout>
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