Android Open Source - lucene Fullscreen Controller

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (C) 2011-2012 Takahiro Yoshimura
 *//from   ww  w .  j  av a  2 s.  co  m
 * 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/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * AdMob library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 *
 * You must obey the GNU General Public License in all respects for
 * all of the code used other than AdMob.  If you modify file(s) with
 * this exception, you may extend this exception to your version of
 * the file(s), but you are not obligated to do so.  If you do not
 * wish to do so, delete this exception statement from your version.
 * If you delete this exception statement from all source files in the
 * program, then also delete it here.
 */

package com.gmail.altakey.lucene;

import android.app.Activity;
import android.app.ActionBar;
import android.view.Window;
import android.view.WindowManager;

import java.util.*;
import android.view.*;

public final class FullscreenController
{
  private final Activity activity;
  private final View view;

  private boolean active;

  private final SystemUiStyler styler = new SystemUiStyler();

  public FullscreenController(final View view)
  {
    this.view = view;
    this.activity = (Activity)view.getContext();
    this.active = false;
  }

  public void onCreate()
  {
    try
    {
      final ActionBar bar = this.activity.getActionBar();
    }
    catch (NoSuchMethodError e)
    {
      this.activity.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
    }
  }

  public void activate()
  {
    this.active = true;
    this.activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                       WindowManager.LayoutParams.FLAG_FULLSCREEN);
    try
    {
      this.activity.getActionBar().hide();
      this.styler.styleSystemUi();
      this.styler.listen();
    }
    catch (NoSuchMethodError e)
    {
    }
  }

  public void deactivate()
  {
    this.active = false;
    this.activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
    try
    {
      this.activity.getActionBar().show();
      this.styler.styleSystemUi();
      this.styler.unlisten();
    }
    catch (NoSuchMethodError e)
    {
    }
  }

  private final class SystemUiStyler
  {
    private boolean canHideSystemUi()
    {
      return activity.getResources().getBoolean(R.bool.cap_can_hide_system_ui);
    }
    
    private int getExpectedVisibility()
    {
      if (!active)
      {
        return View.SYSTEM_UI_FLAG_VISIBLE;
      }
      else
      {
        if (this.canHideSystemUi())
          return View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
        else
          return View.SYSTEM_UI_FLAG_LOW_PROFILE;
      }
    }

    public void styleSystemUi()
    {
      try
      {
        view.setSystemUiVisibility(this.getExpectedVisibility());
      }
      catch (NoSuchMethodError e)
      {
      }
    }

    public void listen()
    {
      try
      {
        view.setOnSystemUiVisibilityChangeListener(new DeferredVisibilityRestorer());
      }
      catch (NoSuchMethodError e)
      {
      }
      catch (NoClassDefFoundError e)
      {
      }
    }  

    public void unlisten()
    {
      try
      {
        view.setOnSystemUiVisibilityChangeListener(null);
      }
      catch (NoSuchMethodError e)
      {
      }
    }

    private final class DeferredVisibilityRestorer implements View.OnSystemUiVisibilityChangeListener
    {
      private Timer timer;

      @Override
      public void onSystemUiVisibilityChange(int visibility)
      {
        if (visibility != getExpectedVisibility())
        {
          if (this.timer != null)
          {
            this.timer.cancel();
            this.timer.purge();
            this.timer = null;
          }
        
          this.timer = new Timer();
          this.timer.schedule(new TimerTask() 
          {
            public void run()
            {
              activity.runOnUiThread(
                new Runnable() 
                {
                  public void run() 
                  {
                    styleSystemUi();
                  }
                }
                );
            }
          }, 3000);
        }
      }
    }
  }
}

Java Source Code List

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