/* * 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; } }