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