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   源码介绍

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package com.example.testrssi;

import android.app.Activity; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.net.wifi.WifiInfo; 
import android.net.wifi.WifiManager; 
import android.os.Bundle; 
import android.os.Handler; 
import android.util.Log; 
import android.view.Menu; 
import android.widget.ImageButton; 
import android.widget.TextView; 
 
public class WifiExample extends Activity { 
 
    private final String TAG = "WifiExample"; 
     
    private IntentFilter      mWifiIntentFilter; 
    private BroadcastReceiver mWifiIntentReceiver; 
     
    private ImageButton       mIconWifi; 
    private TextView          mLabelWifi; 
    private Handler           mHandler; 
     
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.activity_wifi_example); 
         
        mIconWifi  = (ImageButton)findViewById(R.id.Icon_WifiStatus); 
        mLabelWifi = (TextView)findViewById(R.id.Label_WifiDetail);  
                 
        mWifiIntentFilter = new IntentFilter(); 
        mWifiIntentFilter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION); 
         
        mWifiIntentReceiver = new mWifiIntentReceiver(); 
        registerReceiver(mWifiIntentReceiver, mWifiIntentFilter); 
         
        mHandler = new Handler(); 
        mHandler.post(new TimerProcess()); 
    } 
 
    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
        //getMenuInflater().inflate(R.menu.activity_wifi_example, menu); 
        return true; 
    } 
     
    private class TimerProcess implements Runnable{ 
        public void run() { 
            showWIFIDetail(); 
            mHandler.postDelayed(this, 500); 
        } 
    } 
     
    public void showWIFIDetail() 
    { 
        WifiInfo info = ((WifiManager)getSystemService(WIFI_SERVICE)).getConnectionInfo(); 
        mIconWifi.setImageLevel(Math.abs(info.getRssi())); 
         
        /*
        info.getBSSID()；      获取BSSID地址。
        info.getSSID()；       获取SSID地址。  需要连接网络的ID
        info.getIpAddress()；  获取IP地址。4字节Int, XXX.XXX.XXX.XXX 每个XXX为一个字节
        info.getMacAddress()； 获取MAC地址。
        info.getNetworkId()；  获取网络ID。
        info.getLinkSpeed()；  获取连接速度，可以让用户获知这一信息。
        info.getRssi()；       获取RSSI，RSSI就是接受信号强度指示
         */ 
         
        int Ip = info.getIpAddress(); 
        String strIp = ""   (Ip & 0xFF)   "."   ((Ip >> 8) & 0xFF)   "."   ((Ip >> 16) & 0xFF)   "."   ((Ip >> 24) & 0xFF); 
         
        mLabelWifi.setText("BSSID : "   info.getBSSID()   "\nSSID : "   info.getSSID()    
                "\nIpAddress : "   strIp   "\nMacAddress : "   info.getMacAddress()   
                "\nNetworkId : "   info.getNetworkId()   "\nLinkSpeed : "   info.getLinkSpeed()   "Mbps"    
                "\nRssi : "   info.getRssi()); 
        info.getIpAddress(); 
    } 
     
    private class mWifiIntentReceiver extends BroadcastReceiver{ 
 
        public void onReceive(Context context, Intent intent) { 
 
            WifiInfo info = ((WifiManager)getSystemService(WIFI_SERVICE)).getConnectionInfo(); 
            mIconWifi.setImageLevel(Math.abs(info.getRssi())); 
         
            /*
            WifiManager.WIFI_STATE_DISABLING   正在停止
            WifiManager.WIFI_STATE_DISABLED    已停止
            WifiManager.WIFI_STATE_ENABLING    正在打开
            WifiManager.WIFI_STATE_ENABLED     已开启
            WifiManager.WIFI_STATE_UNKNOWN     未知
             */ 
             
            switch (intent.getIntExtra("wifi_state", 0)) { 
            case WifiManager.WIFI_STATE_DISABLING: 
                Log.d(TAG, "WIFI STATUS : WIFI_STATE_DISABLING"); 
                break; 
            case WifiManager.WIFI_STATE_DISABLED: 
                Log.d(TAG, "WIFI STATUS : WIFI_STATE_DISABLED"); 
                break; 
            case WifiManager.WIFI_STATE_ENABLING: 
                Log.d(TAG, "WIFI STATUS : WIFI_STATE_ENABLING"); 
                break; 
            case WifiManager.WIFI_STATE_ENABLED: 
                Log.d(TAG, "WIFI STATUS : WIFI_STATE_ENABLED"); 
                break; 
            case WifiManager.WIFI_STATE_UNKNOWN: 
                Log.d(TAG, "WIFI STATUS : WIFI_STATE_UNKNOWN"); 
                break; 
        } 
    } 
    } 
}