Android Open Source - WifiHotspotBTEnabler Wifi Utilities

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The source code is released under:

GNU General Public License

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Java Source Code

/*from w  w w  . jav a2 s  . c  om*/
import java.util.ArrayList;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

 * Require permissions for :
 * android.permission.ACCESS_WIFI_STATE
 * android.permission.CHANGE_WIFI_STATE
 * @author Diogo Soares, 02/2014
public class WifiUtilities {
  private ArrayList<WifiUtilitiesListener> mListeners = null;
  private int mState = WifiManager.WIFI_STATE_DISABLED;
  private int mPreviousState = WifiManager.WIFI_STATE_DISABLED;
  private int mPreviousFinalState = WifiManager.WIFI_STATE_DISABLED; // Disabled or Enabled only
  private Context mContext = null;
  private IntentFilter mIntentFilter = null;
  private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
      public void onReceive(Context context, Intent intent) {
          String action = intent.getAction();
          if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)) {
            mState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_DISABLED);
            mPreviousState = intent.getIntExtra(WifiManager.EXTRA_PREVIOUS_WIFI_STATE, WifiManager.WIFI_STATE_DISABLED);
            if (mPreviousState==WifiManager.WIFI_STATE_DISABLED || mPreviousState==WifiManager.WIFI_STATE_ENABLED)
              mPreviousFinalState = mPreviousState;
            for(WifiUtilitiesListener listener:mListeners)
  public WifiUtilities(Context context) {
    this.mContext = context;
    mIntentFilter = new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION);
    mContext.registerReceiver(mReceiver, mIntentFilter);
    mListeners = new ArrayList<WifiUtilitiesListener>();
  public void setListener(WifiUtilitiesListener listener) { this.mListeners.add(listener); }
  public void removeListener(WifiUtilitiesListener listener) { this.mListeners.remove(listener); }
  public void setEnableWifiHotspot(boolean enable) {
      WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
  public int getState() {  return this.mState; }
  public int getPreviousState() {  return this.mPreviousState; }
  public int getPreviousFinalState() { return this.mPreviousFinalState; }
  public static String getWifiStateString(int state) {
    switch (state) {
    case WifiManager.WIFI_STATE_DISABLED:
      return "Disabled";
    case WifiManager.WIFI_STATE_DISABLING:
      return "Disabling";
    case WifiManager.WIFI_STATE_ENABLED:
      return "Enabled";
    case WifiManager.WIFI_STATE_ENABLING:
      return "Enabling";
      return "Unknown";

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