/*
* Geopaparazzi - Digital field mapping on Android based devices
* Copyright (C) 2016 HydroloGIS (www.hydrologis.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 eu.geopaparazzi.library.util;
import android.app.Activity;
import android.util.DisplayMetrics;
/**
* Helper class for screen matters.
*
* @author Andrea Antonello (www.hydrologis.com)
*/
public class ScreenHelper {
private static ScreenHelper screenHelper;
private final Activity activity;
private ScreenHelper( Activity activity ) {
this.activity = activity;
}
/**
* @param activity activity.
* @return the singleton instance.
* @throws Exception if something goes wrong.
*/
public static ScreenHelper getInstance( Activity activity ) throws Exception {
if (screenHelper == null) {
screenHelper = new ScreenHelper(activity);
}
return screenHelper;
}
/**
* Gets the density of the screen.
*
* Can be checked with:
* <code>
* switch( metrics.densityDpi ) {
* case DisplayMetrics.DENSITY_LOW:
* break;
* case DisplayMetrics.DENSITY_MEDIUM:
* break;
* case DisplayMetrics.DENSITY_HIGH:
* break;
* }
* </code>
*
* @return the density of the screen.
*/
public int getDensity() {
DisplayMetrics metrics = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
return metrics.densityDpi;
}
}