Searching android devices using WiFi app
<p>I am working on a WiFi based app, I have a program with me and i also added permissions still it is not giving response.</p>

<p>How to test it or emulate it once it does?</p>

<p>I have added this permission block:</p>

<pre><code>&lt;uses-permission android:name="android.permission.ACCESS_WIFI_STATE"&gt;&lt;/uses-permission&gt;
&lt;uses-permission android:name="android.permission.ACCESS_CHECKIN_PROPERTIES"&gt;&lt;/uses-permission&gt;
&lt;uses-permission android:name="android.permission.WAKE_LOCK"&gt;&lt;/uses-permission&gt;
&lt;uses-permission android:name="android.permission.INTERNET"&gt;&lt;/uses-permission&gt;
&lt;uses-permission android:name="android.permission.CHANGE_WIFI_STATE"&gt;&lt;/uses-permission&gt;
&lt;uses-permission android:name="android.permission.MODIFY_PHONE_STATE"&gt;&lt;/uses-permission&gt;
</code></pre>

<p>Here is my source:</p>

<pre><code> package org.example.WiFi;
 import java.util.List;
 import android.app.Activity; 
 import android.content.BroadcastReceiver; 
 import android.content.Context; 
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.net.wifi.ScanResult; 
 import android.net.wifi.WifiManager;
 import android.os.Bundle; 
 import android.view.Menu;
 import android.view.MenuItem;
 import android.widget.TextView;

 public class WiFiActivity extends Activity {
    TextView mainText;

    WifiManager mainWifi;

    WifiReceiver receiverWifi;

    List&lt;ScanResult&gt; wifiList;

    StringBuilder sb = new StringBuilder();



public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.search);

    mainText = (TextView) findViewById(R.id.search);

    mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);


    receiverWifi = new WifiReceiver();

    registerReceiver(receiverWifi, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

    mainWifi.startScan();

    mainText.setText("\nStarting Scan...\n");

}
    public boolean onCreateOptionsMenu(Menu menu) {

            menu.add(0, 0, 0, "Refresh");

            return super.onCreateOptionsMenu(menu);

    }
    public boolean onMenuItemSelected(int featureId, MenuItem item) {

            mainWifi.startScan();

            mainText.setText("Starting Scan");

            return super.onMenuItemSelected(featureId, item);

    }
    protected void onPause() {

            unregisterReceiver(receiverWifi);

            super.onPause();

    }

    protected void onResume() {

            registerReceiver(receiverWifi, new 

    IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

            super.onResume();

    }
     ass WifiReceiver extends BroadcastReceiver {

            public void onReceive(Context c, Intent intent) {

                    sb = new StringBuilder();

                    wifiList = mainWifi.getScanResults();

            for(int i = 0; i &lt; wifiList.size(); i++){

                    sb.append(new Integer(i+1).toString() + ".");

                    sb.append((wifiList.get(i)).toString());

                    sb.append("\n");

            }
            mainText.setText(sb);

            }

    } 
}
</code></pre>
