Mobile

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package a.c;<br />
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import java.util.ArrayList;<br />
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import java.util.List;<br />
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import a.c.WifiActivity.WifiReceiver;<br />
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import android.app.Activity;<br />
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import android.content.BroadcastReceiver;<br />
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import android.content.Context;<br />
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import android.content.Intent;<br />
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import android.content.IntentFilter;<br />
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import android.net.wifi.ScanResult;<br />
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import android.net.wifi.WifiManager;<br />
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import android.os.Bundle;<br />
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import android.widget.TextView;<br />
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import android.widget.Toast;<br />
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public class WifiActivity extends Activity {<br />
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    private WifiManager mainWifi;<br />
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    private WifiReceiver receiverWifi;<br />
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TextView sig;<br />
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    /** Called when the activity is first created. */<br />
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    @Override<br />
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    public void onCreate(Bundle savedInstanceState) {<br />
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        super.onCreate(savedInstanceState);<br />
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        setContentView(R.layout.main);<br />
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        mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);<br />
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        receiverWifi = new WifiReceiver();<br />
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            registerReceiver(receiverWifi, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));<br />
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    }<br />
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    class WifiReceiver extends BroadcastReceiver {<br />
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        public void onReceive(Context c, Intent intent) {<br />
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            List<ScanResult> wifiList = mainWifi.getScanResults();<br />
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            for (int i = 0; i < wifiList.size(); i++) {<br />
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                ScanResult scanResult = wifiList.get(i);<br />
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[b]// I have to put a try catch block here otherwise it returns an exception.[/b]<br />
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               try{<br />
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                sig.append(scanResult.level+";");<br />
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                   }<br />
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catch(exception e){}<br />
    }<br />
        }<br />
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    }<br />
}<br />
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