Android Open Source - ubihelper Wifi Status Activity

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From Project

Back to project page ubihelper.

License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (c) 2012 The University of Nottingham
 * /* w w  w . ja  v a 2  s.  c o m*/
 * This file is part of ubihelper
 *
 *  ubihelper is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  ubihelper is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with ubihelper. If not, see <http://www.gnu.org/licenses/>.
 *  
 *  @author Chris Greenhalgh (cmg@cs.nott.ac.uk), The University of Nottingham
 */
package uk.ac.horizon.ubihelper.ui;

import uk.ac.horizon.ubihelper.R;
import uk.ac.horizon.ubihelper.R.id;
import uk.ac.horizon.ubihelper.R.layout;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.DhcpInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

/**
 * @author cmg
 *
 */
public class WifiStatusActivity extends Activity {
  private static final String TAG = "ubihelper-wifistatus";
  
  private BroadcastReceiver updateReceiver = new UpdateReceiver();
  
  /* (non-Javadoc)
   * @see android.app.Activity#onCreate(android.os.Bundle)
   */
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.wifistatus);
  }

  @Override
  protected void onResume() {
    super.onResume();
    IntentFilter filter = new IntentFilter(WifiManager.NETWORK_STATE_CHANGED_ACTION);
    filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);
    registerReceiver(updateReceiver, filter);
    updateView();
  }

  @Override
  protected void onPause() {
    super.onPause();
    unregisterReceiver(updateReceiver);
  }

  /** broadcast receiver */
  private class UpdateReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
      // strangely, doesn't seem to be called for Disabling -> Disabled
      // Is called for Enabling -> Enabled, for change (new) SSID, and 
      // change (allocate) IP. Ah that might be NETWORK_STATE_CHANGED_ACTION
      // vs WIFI_STATE_CHANGED_ACTION
      Log.d(TAG,"Received broadcast "+intent.getAction());
      WifiStatusActivity.this.runOnUiThread(new Runnable() {
        public void run() {
          updateView();
        }
      });
    }    
  }
  
  private void updateView() {
    WifiManager wifi = (WifiManager)getSystemService(WIFI_SERVICE);
    TextView wifi_status_text = (TextView)findViewById(R.id.wifi_status_text);
    int state = wifi.getWifiState();
    switch(state) {
    case WifiManager.WIFI_STATE_ENABLED:
      wifi_status_text.setText("Enabled");
      break;
    case WifiManager.WIFI_STATE_ENABLING:
      wifi_status_text.setText("Enabling");
      break;
    case WifiManager.WIFI_STATE_DISABLED:
      wifi_status_text.setText("Disabled");
      break;
    case WifiManager.WIFI_STATE_DISABLING:
      wifi_status_text.setText("Disabling");
      break;
    case WifiManager.WIFI_STATE_UNKNOWN:
      wifi_status_text.setText("Unknown");
      break;
    default:
      wifi_status_text.setText("Unknown ("+state+")");        
    }
    WifiInfo ci = wifi.getConnectionInfo();
    // this seems to be an empty string if disabled (inc. on emulator)
    String ssid = ci!=null ? ci.getSSID() : "-";
    int ip = ci!=null ? ci.getIpAddress() : 0;
    // this seems to be avabile in usual xx:xx:xx:xx:xx:xx format on real device
    // even with wifi disabled, but not on emulator
    String mac = ci!=null ? ci.getMacAddress() : "-";
    
    ((TextView)findViewById(R.id.wifi_ssid_text)).setText(ssid);
    ((TextView)findViewById(R.id.wifi_ip_text)).setText(ip2string(ip));
    ((TextView)findViewById(R.id.wifi_mac_text)).setText(mac);
    
    // this information is cached and returned on real device even 
    // when no longer valid, e.g. if wifi now disabled.
    DhcpInfo di = wifi.getDhcpInfo();
    int ip2 = di!=null ? di.ipAddress : 0;
    int netmask = di!=null ? di.netmask : 0;
    int gateway = di!=null ? di.gateway : 0;

    ((TextView)findViewById(R.id.wifi_ip2_text)).setText(ip2string(ip2));
    ((TextView)findViewById(R.id.wifi_netmask_text)).setText(ip2string(netmask));
    ((TextView)findViewById(R.id.wifi_gateway_text)).setText(ip2string(gateway));
  }

  public static String ip2string(int ip) {
    // NB at least on my samsung google s the high-byte is in the low bits
    StringBuilder sb = new StringBuilder();
    sb.append(Integer.toString((ip) & 0xff));
    sb.append(".");
    sb.append(Integer.toString((ip >> 8) & 0xff));
    sb.append(".");
    sb.append(Integer.toString((ip >> 16) & 0xff));
    sb.append(".");
    sb.append(Integer.toString((ip >> 24) & 0xff));
    return sb.toString();
  }
}

Java Source Code List

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