HTML DSL

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HTML DSL

Build valid HTML for Android TextView.
HTML Kotlin
Stars Forks

DEMO SCREENSHOT

Provides a DSL to build HTML for Android TextView

License Maven Central

Description

There is a lovely method on the android.text.Html class, fromHtml, that converts HTML into a Spannable for use with a TextView.

However, the documentation does not stipulate what HTML tags are supported, which makes this method a bit hit-or-miss. This small library provides a DSL for building valid HTML for android.widget.TextView.

Download

Download the latest AAR or grab via Gradle:

implementation("com.jaredrummler:html-dsl:1.0.0")

Structure

  • buildSrc — Gradle dependencies, plugins, versions
  • library - The HTML DSL library
  • library/src/test - Unit tests for the library
  • demo - Android demo project using HTML DSL
  • scripts - Scripts to publish library to Maven

Usage

Create HTML:

HTML.create {
        h1("HTML DSL")
        strong("Provides a DSL to build HTML for Android TextView")
}

Set HTML on a TextView:

textView.setHtml {
    h1("HTML DSL").br()
    strong("Build valid HTML for Android TextView.").br().br()
    h3("Android Versions:")
    ul {
        li {
            a(href = "https://developer.android.com/about/versions/12/get") {
                +"Android 12 Beta"
            }
        }
        li("Android 11")
        li("Android 10")
        li("Pie")
        li("Oreo")
        li("Nougat")
        li("Marshmallow")
        li("Lollipop")
        // ...
    }

    small {
        sub {
            +"by "
            a {
                href = "https://github.com/jaredrummler"
                text = "Jared Rummler"
            }
        }
    }
}

Render HTML to a string

val htmlString = HTML.create {
    p {
        font(face = "monospace", color = "#3ddc84") {
            unsafe {
                +"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
            }
        }
    }
}.render(prettyPrint = true)

Write HTML to a file:

HtmlRenderer<FileWriter>(HTML.create {
    small {
        sub {
            +"by "
            a {
                href = "https://github.com/jaredrummler"
                text = "Jared Rummler"
            }
        }
    }
}, FileWriter("output.html"), true)

Supported HTML elements:

  • <a href="...">
  • <b>
  • <big>
  • <blockquote>
  • <br>
  • <cite>
  • <dfn>
  • <div align="...">
  • <em>
  • <font color="..." face="...">
  • <h1>
  • <h2>
  • <h3>
  • <h4>
  • <h5>
  • <h6>
  • <i>
  • <img src="...">
  • <p>
  • <small>
  • <strike>
  • <strong>
  • <sub>
  • <sup>
  • <tt>
  • <u>
  • <ul>
  • <li>

License

Copyright 2021 Jared Rummler

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.
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