DisplayUtils.java

/*
Yaaic - Yet Another Android IRC Client

Copyright 2009-2013 Sebastian Kaspari

This file is part of Yaaic.

Yaaic 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.

Yaaic 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 Yaaic.  If not, see <http://www.gnu.org/licenses/>.
 */
package indrora.atomic.utils;

import android.content.Context;

/**
 * Helper class for methods regarding the display of the current device.
 *
 * @author Sebastian Kaspari <sebastian@yaaic.org>
 */
public class DisplayUtils {
  private static float density = -1;

  /**
   * Convert the given density-independent pixels into real pixels for the
   * display of the device.
   *
   * @param dp
   * @return
   */
  public static int convertToPixels(Context context, int dp) {
    float density = getScreenDensity(context);

    return (int)(dp * density + 0.5f);
  }

  /**
   * Get the density of the display of the device.
   *
   * @param context
   * @return
   */
  public static float getScreenDensity(Context context) {
    if( density == -1 ) {
      density = context.getResources().getDisplayMetrics().density;
    }

    return density;
  }
}