其实使用起来很方便，对藏文完美支持，好像知乎也用了。也没有深入去研究写，主要看到两个项目优点多，几行代码就搞定！

• Custom Fonts
• Custom Text Size
• Themes / Day mode / Night mode
• Text Highlighting
• List / Edit / Delete Highlights
• Handle Internal and External Links
• Portrait / Landscape
• Reading Time Left / Pages left
• In-App Dictionary
• Media Overlays (Sync text rendering with audio playback)
• TTS - Text to Speech Support
• Book Search
• Add Notes to a Highlight
• Last Read Position Listener
• Horizontal reading
• Distraction Free Reading

• can be used in Activity, Service, Fragment, Dialog, popupWindow, Notification and other components
• support the task of automatic scheduling, the user does not need to care about the state of the task switch logic
• Through the Aria event, it is easy to get the download status of the current download task
• a code plus can get the current download speed
• a code can be dynamically set the maximum number of downloads
• code to achieve speed limit
• It is easy to modify the number of download threads by modifying the configuration file
• priority to download a task

• Android Studio 安卓开发工具，被墙了下面是国内地址 http://www.android-studio.org/ 但感觉还是jetbrains的IDE比较牛逼 http://www.jetbrains.com
• FolioReader项目地址 https://github.com/FolioReader/FolioReader-Android
• Ari项目地址 https://github.com/AriaLyy/Aria/blob/master/ENGLISH_README.md

在manifest中配置权限

<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"
        tools:ignore="ProtectedPermissions" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

另外加一行配置Android9.0的

<application android:networkSecurityConfig="@xml/network_security_config">

之后在相应的/res/xml/network_security_config.xml配置

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">127.0.0.1</domain>
        <domain includeSubdomains="true">localhost</domain>
    </domain-config>
</network-security-config>

在仓库中添加依赖包

    implementation "com.folioreader:folioreader:0.5.1"
    implementation 'com.arialyy.aria:aria-core:3.5.1'
    annotationProcessor 'com.arialyy.aria:aria-compiler:3.5.1'

下载

                Aria.download(this)
                        .load(DOWNLOAD_URL)
                        .setFilePath(filepath,true)
                        .start();
               

打开 folioReader.openBook("sdcard/bookeader/1.epub");

之后运行测试