Java tutorial
//package com.java2s; /* * Zirco Browser for Android * * Copyright (C) 2010 J. Devauchelle and contributors. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 3 as published by the Free Software Foundation. * * 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. */ import android.app.Activity; import android.util.DisplayMetrics; public class Main { private static int mImageButtonSize = -1; public static int getImageButtonSize(Activity activity) { if (mImageButtonSize == -1) { DisplayMetrics metrics = new DisplayMetrics(); activity.getWindowManager().getDefaultDisplay().getMetrics(metrics); switch (metrics.densityDpi) { case DisplayMetrics.DENSITY_LOW: mImageButtonSize = 16; break; case DisplayMetrics.DENSITY_MEDIUM: mImageButtonSize = 32; break; case DisplayMetrics.DENSITY_HIGH: mImageButtonSize = 48; break; default: mImageButtonSize = 32; } } return mImageButtonSize; } }