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    copied!<p>I used your code only without changing anything except added permissions in manifest file. Its working for me Check the code</p> <pre><code>public class MainActivity extends Activity { WifiManager Wifi; BroadcastReceiver receiver; List&lt;ScanResult&gt; results; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //GUI bt1=(Button)findViewById(R.id.btn1); t1=(TextView)findViewById(R.id.txt1); // to enable wifi service Wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); bt1.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { WifiInfo info = Wifi.getConnectionInfo(); if (info.getBSSID()==null) { t1.setText("You are currently not connected to any wireless network.\n"); } else { t1.append("Current Status:\n"); t1.append("Network Name :"+info.getSSID().toString()+"\n"); t1.append("RSSI :"+info.getRssi()+"\n"); } } }); Wifi.startScan(); // Register Broadcast Receiver if (receiver == null) receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { results =Wifi.getScanResults(); // Intent I1 =new Intent(); } }; registerReceiver(receiver, new IntentFilter( WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)); } /*@Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_wizer, menu); return true; }*/ public void onStop() { unregisterReceiver(receiver); } } </code></pre> <p>Manifest.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.textoverlay" android:versionCode="1" android:versionName="1.0" &gt; &lt;uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /&gt; &lt;uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/&gt; &lt;uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/&gt; &lt;application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" &gt; &lt;activity android:name="com.example.textoverlay.MainActivity" android:label="@string/app_name" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;/application&gt; </code></pre> <p></p>
 

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