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Create AutoSizeCompat
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‎autosize/src/main/java/me/jessyan/autosize/AutoSizeCompat.java‎

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/*
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* Copyright 2019 JessYan
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package me.jessyan.autosize;
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import android.app.Activity;
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import android.content.res.Resources;
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import android.util.DisplayMetrics;
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import java.lang.reflect.Field;
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import java.util.Locale;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import me.jessyan.autosize.external.ExternalAdaptInfo;
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import me.jessyan.autosize.external.ExternalAdaptManager;
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import me.jessyan.autosize.internal.CustomAdapt;
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import me.jessyan.autosize.utils.LogUtils;
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import me.jessyan.autosize.utils.Preconditions;
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/**
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* ================================================
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* 当遇到本来适配正常的布局突然出现适配失效，适配异常等问题, 重写当前 {@link Activity} 的 {@link Activity#getResources()} 并调用
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* {@link AutoSizeCompat} 的对应方法即可解决问题
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* <p>
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* Created by JessYan on 2018/8/8 19:20
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* <a href="mailto:[email protected]">Contact me</a>
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* <a href="https://github.com/JessYanCoding">Follow me</a>
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* ================================================
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*/
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public final class AutoSizeCompat {
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private static Map<String, DisplayMetricsInfo> mCache = new ConcurrentHashMap<>();
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private AutoSizeCompat() {
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throw new IllegalStateException("you can't instantiate me!");
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}
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/**
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* 使用 AndroidAutoSize 初始化时设置的默认适配参数进行适配 (AndroidManifest 的 Meta 属性)
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*
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* @param resources {@link Resources}
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*/
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public static void autoConvertDensityOfGlobal(Resources resources) {
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if (AutoSizeConfig.getInstance().isBaseOnWidth()) {
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autoConvertDensityBaseOnWidth(resources, AutoSizeConfig.getInstance().getDesignWidthInDp());
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} else {
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autoConvertDensityBaseOnHeight(resources, AutoSizeConfig.getInstance().getDesignHeightInDp());
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}
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}
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/**
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* 使用 {@link Activity} 或 {@link android.support.v4.app.Fragment} 的自定义参数进行适配
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*
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* @param resources {@link Resources}
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* @param customAdapt {@link Activity} 或 {@link android.support.v4.app.Fragment} 需实现 {@link CustomAdapt}
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*/
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public static void autoConvertDensityOfCustomAdapt(Resources resources, CustomAdapt customAdapt) {
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Preconditions.checkNotNull(customAdapt, "customAdapt == null");
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float sizeInDp = customAdapt.getSizeInDp();
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//如果 CustomAdapt#getSizeInDp() 返回 0, 则使用在 AndroidManifest 上填写的设计图尺寸
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if (sizeInDp <= 0) {
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if (customAdapt.isBaseOnWidth()) {
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sizeInDp = AutoSizeConfig.getInstance().getDesignWidthInDp();
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} else {
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sizeInDp = AutoSizeConfig.getInstance().getDesignHeightInDp();
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}
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}
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autoConvertDensity(resources, sizeInDp, customAdapt.isBaseOnWidth());
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}
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/**
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* 使用外部三方库的 {@link Activity} 或 {@link android.support.v4.app.Fragment} 的自定义适配参数进行适配
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*
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* @param resources {@link Resources}
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* @param externalAdaptInfo 三方库的 {@link Activity} 或 {@link android.support.v4.app.Fragment} 提供的适配参数, 需要配合 {@link ExternalAdaptManager#addExternalAdaptInfoOfActivity(Class, ExternalAdaptInfo)}
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*/
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public static void autoConvertDensityOfExternalAdaptInfo(Resources resources, ExternalAdaptInfo externalAdaptInfo) {
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Preconditions.checkNotNull(externalAdaptInfo, "externalAdaptInfo == null");
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float sizeInDp = externalAdaptInfo.getSizeInDp();
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//如果 ExternalAdaptInfo#getSizeInDp() 返回 0, 则使用在 AndroidManifest 上填写的设计图尺寸
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if (sizeInDp <= 0) {
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if (externalAdaptInfo.isBaseOnWidth()) {
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sizeInDp = AutoSizeConfig.getInstance().getDesignWidthInDp();
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} else {
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sizeInDp = AutoSizeConfig.getInstance().getDesignHeightInDp();
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}
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}
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autoConvertDensity(resources, sizeInDp, externalAdaptInfo.isBaseOnWidth());
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}
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/**
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* 以宽度为基准进行适配
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*
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* @param resources {@link Resources}
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* @param designWidthInDp 设计图的总宽度
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*/
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public static void autoConvertDensityBaseOnWidth(Resources resources, float designWidthInDp) {
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autoConvertDensity(resources, designWidthInDp, true);
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}
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/**
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* 以高度为基准进行适配
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*
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* @param resources {@link Resources}
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* @param designHeightInDp 设计图的总高度
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*/
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public static void autoConvertDensityBaseOnHeight(Resources resources, float designHeightInDp) {
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autoConvertDensity(resources, designHeightInDp, false);
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}
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/**
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* 这里是今日头条适配方案的核心代码, 核心在于根据当前设备的实际情况做自动计算并转换 {@link DisplayMetrics#density}、
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* {@link DisplayMetrics#scaledDensity}、{@link DisplayMetrics#densityDpi} 这三个值, 额外增加 {@link DisplayMetrics#xdpi}
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* 以支持单位 {@code pt}、{@code in}、{@code mm}
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*
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* @param resources {@link Resources}
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* @param sizeInDp 设计图上的设计尺寸, 单位 dp, 如果 {@param isBaseOnWidth} 设置为 {@code true},
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* {@param sizeInDp} 则应该填写设计图的总宽度, 如果 {@param isBaseOnWidth} 设置为 {@code false},
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* {@param sizeInDp} 则应该填写设计图的总高度
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* @param isBaseOnWidth 是否按照宽度进行等比例适配, {@code true} 为以宽度进行等比例适配, {@code false} 为以高度进行等比例适配
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* @see <a href="https://mp.weixin.qq.com/s/d9QCoBP6kV9VSWvVldVVwA">今日头条官方适配方案</a>
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*/
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public static void autoConvertDensity(Resources resources, float sizeInDp, boolean isBaseOnWidth) {
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Preconditions.checkNotNull(resources, "resources == null");
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float subunitsDesignSize = isBaseOnWidth ? AutoSizeConfig.getInstance().getUnitsManager().getDesignWidth()
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: AutoSizeConfig.getInstance().getUnitsManager().getDesignHeight();
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subunitsDesignSize = subunitsDesignSize > 0 ? subunitsDesignSize : sizeInDp;
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int screenSize = isBaseOnWidth ? AutoSizeConfig.getInstance().getScreenWidth()
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: AutoSizeConfig.getInstance().getScreenHeight();
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String key = sizeInDp + "|" + subunitsDesignSize + "|" + isBaseOnWidth + "|"
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+ AutoSizeConfig.getInstance().isUseDeviceSize() + "|"
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+ AutoSizeConfig.getInstance().getInitScaledDensity() + "|"
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+ screenSize;
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DisplayMetricsInfo displayMetricsInfo = mCache.get(key);
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float targetDensity = 0;
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int targetDensityDpi = 0;
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float targetScaledDensity = 0;
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float targetXdpi = 0;
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if (displayMetricsInfo == null) {
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if (isBaseOnWidth) {
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targetDensity = AutoSizeConfig.getInstance().getScreenWidth() * 1.0f / sizeInDp;
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} else {
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targetDensity = AutoSizeConfig.getInstance().getScreenHeight() * 1.0f / sizeInDp;
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}
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float scale = AutoSizeConfig.getInstance().isExcludeFontScale() ? 1 : AutoSizeConfig.getInstance().
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getInitScaledDensity() * 1.0f / AutoSizeConfig.getInstance().getInitDensity();
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targetScaledDensity = targetDensity * scale;
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targetDensityDpi = (int) (targetDensity * 160);
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if (isBaseOnWidth) {
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targetXdpi = AutoSizeConfig.getInstance().getScreenWidth() * 1.0f / subunitsDesignSize;
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} else {
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targetXdpi = AutoSizeConfig.getInstance().getScreenHeight() * 1.0f / subunitsDesignSize;
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}
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mCache.put(key, new DisplayMetricsInfo(targetDensity, targetDensityDpi, targetScaledDensity, targetXdpi));
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} else {
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targetDensity = displayMetricsInfo.getDensity();
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targetDensityDpi = displayMetricsInfo.getDensityDpi();
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targetScaledDensity = displayMetricsInfo.getScaledDensity();
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targetXdpi = displayMetricsInfo.getXdpi();
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}
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setDensity(resources, targetDensity, targetDensityDpi, targetScaledDensity, targetXdpi);
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LogUtils.d(String.format(Locale.ENGLISH, "AutoSizeCompat is running! \nAdapt Info: isBaseOnWidth = %s, %s = %f, %s = %f, targetDensity = %f, targetScaledDensity = %f, targetDensityDpi = %d, targetXdpi = %f"
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, isBaseOnWidth, isBaseOnWidth ? "designWidthInDp"
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: "designHeightInDp", sizeInDp, isBaseOnWidth ? "designWidthInSubunits" : "designHeightInSubunits", subunitsDesignSize
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, targetDensity, targetScaledDensity, targetDensityDpi, targetXdpi));
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}
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/**
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* 取消适配
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*
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* @param resources {@link Resources}
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*/
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public static void cancelAdapt(Resources resources) {
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float initXdpi = AutoSizeConfig.getInstance().getInitXdpi();
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switch (AutoSizeConfig.getInstance().getUnitsManager().getSupportSubunits()) {
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case PT:
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initXdpi = initXdpi / 72f;
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break;
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case MM:
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initXdpi = initXdpi / 25.4f;
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break;
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default:
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}
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setDensity(resources, AutoSizeConfig.getInstance().getInitDensity()
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, AutoSizeConfig.getInstance().getInitDensityDpi()
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, AutoSizeConfig.getInstance().getInitScaledDensity()
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, initXdpi);
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}
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/**
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* 给几大 {@link DisplayMetrics} 赋值
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*
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* @param resources {@link Resources}
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* @param density {@link DisplayMetrics#density}
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* @param densityDpi {@link DisplayMetrics#densityDpi}
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* @param scaledDensity {@link DisplayMetrics#scaledDensity}
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* @param xdpi {@link DisplayMetrics#xdpi}
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*/
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private static void setDensity(Resources resources, float density, int densityDpi, float scaledDensity, float xdpi) {
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//兼容 MIUI
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DisplayMetrics activityDisplayMetricsOnMIUI = getMetricsOnMiui(resources);
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DisplayMetrics appDisplayMetricsOnMIUI = getMetricsOnMiui(AutoSizeConfig.getInstance().getApplication().getResources());
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if (activityDisplayMetricsOnMIUI != null) {
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setDensity(activityDisplayMetricsOnMIUI, density, densityDpi, scaledDensity, xdpi);
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} else {
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DisplayMetrics activityDisplayMetrics = resources.getDisplayMetrics();
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setDensity(activityDisplayMetrics, density, densityDpi, scaledDensity, xdpi);
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}
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if (appDisplayMetricsOnMIUI != null) {
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setDensity(appDisplayMetricsOnMIUI, density, densityDpi, scaledDensity, xdpi);
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} else {
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DisplayMetrics appDisplayMetrics = AutoSizeConfig.getInstance().getApplication().getResources().getDisplayMetrics();
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setDensity(appDisplayMetrics, density, densityDpi, scaledDensity, xdpi);
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}
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}
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/**
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* 赋值
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*
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* @param displayMetrics {@link DisplayMetrics}
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* @param density {@link DisplayMetrics#density}
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* @param densityDpi {@link DisplayMetrics#densityDpi}
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* @param scaledDensity {@link DisplayMetrics#scaledDensity}
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* @param xdpi {@link DisplayMetrics#xdpi}
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*/
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private static void setDensity(DisplayMetrics displayMetrics, float density, int densityDpi, float scaledDensity, float xdpi) {
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if (AutoSizeConfig.getInstance().getUnitsManager().isSupportDP()) {
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displayMetrics.density = density;
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displayMetrics.densityDpi = densityDpi;
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}
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if (AutoSizeConfig.getInstance().getUnitsManager().isSupportSP()) {
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displayMetrics.scaledDensity = scaledDensity;
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}
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switch (AutoSizeConfig.getInstance().getUnitsManager().getSupportSubunits()) {
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case NONE:
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break;
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case PT:
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displayMetrics.xdpi = xdpi * 72f;
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break;
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case IN:
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displayMetrics.xdpi = xdpi;
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break;
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case MM:
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displayMetrics.xdpi = xdpi * 25.4f;
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break;
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default:
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}
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}
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/**
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* 解决 MIUI 更改框架导致的 MIUI7 + Android5.1.1 上出现的失效问题 (以及极少数基于这部分 MIUI 去掉 ART 然后置入 XPosed 的手机)
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* 来源于: https://github.com/Firedamp/Rudeness/blob/master/rudeness-sdk/src/main/java/com/bulong/rudeness/RudenessScreenHelper.java#L61:5
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*
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* @param resources {@link Resources}
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* @return {@link DisplayMetrics}, 可能为 {@code null}
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*/
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private static DisplayMetrics getMetricsOnMiui(Resources resources) {
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if ("MiuiResources".equals(resources.getClass().getSimpleName()) || "XResources".equals(resources.getClass().getSimpleName())) {
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try {
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Field field = Resources.class.getDeclaredField("mTmpMetrics");
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field.setAccessible(true);
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return (DisplayMetrics) field.get(resources);
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} catch (Exception e) {
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return null;
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}
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}
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return null;
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}
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}

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