Android Open Source - wifilock Toggle Activity

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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.  j av  a  2 s  .  c om
        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.Activity;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Build.VERSION;
import android.provider.Settings;
import android.provider.Settings.SettingNotFoundException;
import android.util.Log;

public class ToggleActivity extends Activity {

  static public boolean weArePreCupcake() {
    return (VERSION.SDK.equals("1") || VERSION.SDK.equals("2"));
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.finish();

    // Pre-Cupcake, we are holding a WifiLock. After Cupcake,
    // we are just toggling the built-in setting.
    if (weArePreCupcake()) {
      enableBootReceiverAndService();
      WifiLockService.toggle(this, true);
    }
    else
    {
      this.toggle();
    }
  }

  /**
   * Beginning with Cupcake, we don't need those any longer for
   * functioning, so they are disabled by default. The first time
   * WifiLock is started on a pre-Cupcake device, they are enabled
   * if needed.
   */
  public void enableBootReceiverAndService() {
    Log.v(WifiLockService.LOG_TAG, "Running on a pre-Cupcake device, "+
        "ensuring that service and bootreceiver components are active.");
    // TODO: Considering that we are running this code on every call
    // now, I guess we might just as well go back to using the
    // PackageManager to enable/disable autostart rather than using the
    // setting? Except of course if setting the state to the value that
    // it already has is quicker than changing it - in which case only
    // the first use would be slower, and subsequently, the user would
    // enjoy the performance boost through not having to go through the
    // package manager.
    PackageManager pm = getPackageManager();
    pm.setComponentEnabledSetting(
                new ComponentName(this, BootReceiver.class),
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);
    pm.setComponentEnabledSetting(
                new ComponentName(this, WifiLockService.class),
                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);
  }

  // TODO: Considering the phasing out of the service use, stuff like
  // LOG_TAG and makeToast() shouldn't be defined inside the
  // WifiLockService class.
  private void toggle() {
    ContentResolver cr = getContentResolver();

    int current = Settings.System.WIFI_SLEEP_POLICY_DEFAULT;
    try {
      current = Settings.System.getInt(cr, Settings.System.WIFI_SLEEP_POLICY);
    } catch (SettingNotFoundException e) {
      // pass over it, assume default
      Log.w(WifiLockService.LOG_TAG, "Setting could not be read, "+
          "assuming WIFI_SLEEP_POLICY_DEFAULT");
    }

    if (current == Settings.System.WIFI_SLEEP_POLICY_DEFAULT) {
      Log.i(WifiLockService.LOG_TAG, "Changing Wifi sleep policy to NEVER");
      Settings.System.putInt(getContentResolver(),
          Settings.System.WIFI_SLEEP_POLICY,
          Settings.System.WIFI_SLEEP_POLICY_NEVER);
      WifiLockService.showToast(this, R.string.setting_to_never);
    }
    else {
      Log.i(WifiLockService.LOG_TAG, "Changing Wifi sleep policy to DEFAULT");
      Settings.System.putInt(getContentResolver(),
          Settings.System.WIFI_SLEEP_POLICY,
          Settings.System.WIFI_SLEEP_POLICY_DEFAULT);
      WifiLockService.showToast(this, R.string.setting_to_default);
    }
  }
}

Java Source Code List

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