Android Open Source - wifilock Wifi Lock Service

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
        WifiLock: keep Wi-Fi active when Phone goes to sleep.
        Copyright (C) 2009 Michael Elsdrfer <http://elsdoerfer.name>
//  w  w  w  .  ja v  a2  s. com
        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        This program 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 General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.elsdoerfer.wifilock;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.net.wifi.WifiManager;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

public class WifiLockService extends Service {

  /**
   * Global state of this service. Is checked by the
   * toggle activity to determine whether to start or
   * stop the service.
   */
  static public boolean serviceRunning = false;

  /**
   * Toast object used to show the toggle messages. By
   * making this global we can reuse an existing object
   * (or cancel it) when the user is toggling quickly.
   */
  static private Toast cachedToastObj = null;

  /**
   * The WifiLock the service holds while running.
   */
  protected WifiManager.WifiLock lock = null;

  static public String LOG_TAG = "WifiLock";

  public WifiLockService() {}

  @Override
  public IBinder onBind(Intent intent) { return null; }

  @Override
  public void onCreate() {
    Log.v(LOG_TAG, "WifiLock service about to be created");
    super.onCreate();

    WifiManager manager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    lock = manager.createWifiLock("com.elsdoerfer.wifilock");
    lock.acquire();
    serviceRunning = true;

    Log.v(LOG_TAG, "WifiLock service creation completed");
  }

  @Override
  public void onDestroy() {
    Log.v(LOG_TAG, "WifiLock service about to shutdown");

    serviceRunning = false;
    lock.release();

    super.onDestroy();
    Log.v(LOG_TAG, "WifiLock service shutdown completed");
  }

  /**
   * Static control functions.
   */

  public static void start(Context context, boolean showToast) {
    Intent svc = new Intent(context, WifiLockService.class);

    Log.d(LOG_TAG, "before startService");
    context.startService(svc);
    if (showToast)
      showToast(context, R.string.service_enabled);
    BootReceiver.enable(context, true);
    Log.d(LOG_TAG, "after startService");
  }

  public static void stop(Context context, boolean showToast) {
    Intent svc = new Intent(context, WifiLockService.class);

    Log.d(LOG_TAG, "before stopService");
    context.stopService(svc);
    if (showToast)
      showToast(context, R.string.service_disabled);
    BootReceiver.enable(context, false);
    Log.d(LOG_TAG, "after stopService");
  }

  public static void toggle(Context context, boolean showToast) {
    if (serviceRunning)
      stop(context, showToast);
    else
      start(context, showToast);
  }

  public static void showToast(Context context, int resid) {
    if (cachedToastObj == null)
      cachedToastObj = Toast.makeText(context, resid, Toast.LENGTH_LONG);
    else {
      cachedToastObj.setText(resid);
    }
    cachedToastObj.show();
  }

}

Java Source Code List

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