ViewSupport/Library/src/main/java/com/gcssloop/view/utils/DensityUtils.java at master · GcsSloop/ViewSupport · GitHub

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/*
 * Copyright 2016 GcsSloop
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Last modified 2016-12-03 22:55:55
 *
 */

packagecom.gcssloop.view.utils;

importandroid.content.Context;

publicclassDensityUtils {

publicDensityUtils() {
 }

/**
 * convert the dp to px depend on the device density.
 *
 * @param context the context
 * @param dpValue a value of dp
 * @return the result of px
 */
publicstaticintdip2px(Contextcontext, floatdpValue) {
return (int) (dpValue * getDensity(context) + 0.5f);
 }

/**
 * convert the px to dp depend on the device density.
 *
 * @param context the context
 * @param pxValue a value of px
 * @return the result of dp
 */
publicstaticintpx2dip(Contextcontext, floatpxValue) {
return (int) (pxValue / getDensity(context) + 0.5f);
 }

/**
 * convert the sp to px depend on the device scaledDensity.
 *
 * @param context the context
 * @param spValue a value of sp
 * @return the result of px
 */
publicstaticintsp2px(Contextcontext, floatspValue) {
return (int) (spValue * getFontDensity(context) + 0.5);
 }

/**
 * convert the px to sp depend on the device scaledDensity.
 *
 * @param context the context
 * @param pxValue a value of px
 * @return the result of sp
 */
publicstaticintpx2sp(Contextcontext, floatpxValue) {
return (int) (pxValue / getFontDensity(context) + 0.5);
 }

/**
 * get the density of device screen.
 *
 * @param context the context
 * @return the screen density
 */
publicstaticfloatgetDensity(Contextcontext) {
returncontext.getResources().getDisplayMetrics().density;
 }

/**
 * get the scale density of device screen.
 * usually this value is the same as density.
 * but it can adjust by user.
 *
 * @param context the context
 * @return the screen scale density.
 */
publicstaticfloatgetFontDensity(Contextcontext) {
returncontext.getResources().getDisplayMetrics().scaledDensity;
 }
}