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POWifi Scanning code
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copied!<p>Here is my code:</p> <pre><code>package hu.wifx.droid; import android.app.Activity; import android.os.Bundle; import android.widget.Button; import android.widget.TextView; import android.view.View; import java.util.List; 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; public class WifXActivity extends Activity { TextView mText; WifiManager mWifi; List<ScanResult> wifiList; StringBuilder _sb = new StringBuilder(); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button btn1 = (Button) findViewById(R.id.btn1); btn1.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { // TODO Auto-generated method stub StartTester(); } }); } public void StartTester() { IntentFilter i = new IntentFilter(); i.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION); mText = (TextView) findViewById(R.id.mainText); mWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); registerReceiver(new BroadcastReceiver(){ public void onReceive(Context c, Intent i) { WifiManager w = (WifiManager)c.getSystemService(Context.WIFI_SERVICE); wifiList = w.getScanResults(); _sb = new StringBuilder(); for(int m = 0; m < wifiList.size(); m++) { _sb.append((wifiList.get(m)).toString()); _sb.append("\\n"); } mText.setText(_sb); } }, i); WifiManager WM = (WifiManager) getSystemService(Context.WIFI_SERVICE); WM.setWifiEnabled(true); WM.startScan(); } } </code></pre> <p>No errors, but when I start the emulator and click on button1:The application has stopped unexpectedly. Why?</p>

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