wifi 신호세기 확인

package com.example.testandroid;

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.util.Log;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.TextView;

public class MainActivity extends Activity {

private static final String LOG_TAG = "LOG"; 

private TextView tvRssi;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// wifi신호강도(세기)(RSSI(received signal strength indication)) 측정  

   tvRssi = (TextView) findViewById(R.id.tvRssi);  

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

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.main, menu);

return true;

}

@Override

public boolean onOptionsItemSelected(MenuItem item) {

int id = item.getItemId();

if (id == R.id.action_settings) {

return true;

}

return super.onOptionsItemSelected(item);

}

// wifi RSSI Receiver  

private BroadcastReceiver rssiReceiver = new BroadcastReceiver() {  

   @Override  

   public void onReceive(Context context, Intent intent) {  

 

       Log.e(LOG_TAG, "Time rssiReceiver");

 

       WifiManager wman = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);

       WifiInfo info = wman.getConnectionInfo();  

 

       int _rssi = info.getRssi();  

 

       tvRssi.setText(_rssi + "");  

 

       Log.e(LOG_TAG, "_rssi ==> " + _rssi);  

 

   }  

};  

}

메니페스트에 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/> 추가