1/* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.support.wear.internal.widget; 18 19import android.content.Context; 20import android.support.annotation.FractionRes; 21import android.support.annotation.RestrictTo; 22import android.support.annotation.RestrictTo.Scope; 23 24/** 25 * Utility methods to help with resource calculations. 26 * 27 * @hide 28 */ 29@RestrictTo(Scope.LIBRARY_GROUP) 30public final class ResourcesUtil { 31 32 /** 33 * Returns the screen width in pixels. 34 */ 35 public static int getScreenWidthPx(Context context) { 36 return context.getResources().getDisplayMetrics().widthPixels; 37 } 38 39 /** 40 * Returns the screen height in pixels. 41 */ 42 public static int getScreenHeightPx(Context context) { 43 return context.getResources().getDisplayMetrics().heightPixels; 44 } 45 46 /** 47 * Returns the number of pixels equivalent to the percentage of {@code resId} to the current 48 * screen. 49 */ 50 public static int getFractionOfScreenPx(Context context, int screenPx, @FractionRes int resId) { 51 float marginPercent = context.getResources().getFraction(resId, 1, 1); 52 return (int) (marginPercent * screenPx); 53 } 54 55 private ResourcesUtil() {} 56} 57