Java tutorial
//package com.java2s; /** * Copyright 2009, 2010 Kevin Gaudin * * This file is part of EmailAlbum. * * EmailAlbum 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. * * EmailAlbum 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 EmailAlbum. If not, see <http://www.gnu.org/licenses/>. */ import android.content.Context; import android.util.DisplayMetrics; import android.view.WindowManager; public class Main { private static DisplayMetrics mMetrics = null; /** * @param ctx */ public static float getDensity(Context ctx) { if (mMetrics == null) { mMetrics = new DisplayMetrics(); ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getMetrics(mMetrics); } return mMetrics.density; } }