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mthli logoKnife

Knife is a rich text editor component for writing documents in Android.

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Top Related Projects

RichEditor for Android is a beautiful Rich Text WYSIWYG Editor for Android.

Android平台下的富文本解析器,支持Html和Markdown

[暂停维护]一个帮助您完成从缩略视图到原视图无缝过渡转变的神奇框架

Quick Overview

Knife is an open-source rich text editor for Android applications. It provides a simple and customizable way to add text formatting capabilities to Android apps, allowing users to create and edit rich text content with features like bold, italic, underline, and more.

Pros

  • Easy integration into Android projects
  • Lightweight and customizable
  • Supports common rich text formatting options
  • Open-source with an active community

Cons

  • Limited advanced formatting features compared to more comprehensive text editors
  • May require additional customization for complex use cases
  • Documentation could be more extensive
  • Not actively maintained (last commit was in 2018)

Code Examples

  1. Basic initialization of Knife:
KnifeText knife = findViewById(R.id.knife);
  1. Applying text formatting:
knife.bold(true);
knife.italic(true);
knife.underline(true);
  1. Setting text and getting formatted content:
knife.fromHtml("<b>Hello</b> <i>World</i>");
String html = knife.toHtml();

Getting Started

To use Knife in your Android project, follow these steps:

  1. Add the dependency to your build.gradle file:
dependencies {
    implementation 'io.github.mthli:knife:1.1'
}
  1. Add the KnifeText view to your layout XML:
<io.github.mthli.knife.KnifeText
    android:id="@+id/knife"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Enter text here..."
    android:padding="8dp" />
  1. Initialize and use Knife in your Activity or Fragment:
KnifeText knife = findViewById(R.id.knife);
knife.bold(true);
knife.italic(true);
knife.underline(true);

Competitor Comparisons

RichEditor for Android is a beautiful Rich Text WYSIWYG Editor for Android.

Pros of richeditor-android

  • More comprehensive feature set, including image insertion and custom styles
  • Better documentation and examples
  • Actively maintained with regular updates

Cons of richeditor-android

  • Larger codebase and potentially higher complexity
  • May have a steeper learning curve for basic implementations

Code Comparison

Knife:

KnifeText knife = (KnifeText) findViewById(R.id.knife);
knife.bold();
knife.italic();
knife.underline();

richeditor-android:

RichEditor editor = (RichEditor) findViewById(R.id.editor);
editor.setBold();
editor.setItalic();
editor.setUnderline();
editor.insertImage("https://example.com/image.jpg", "Image");

Key Differences

  • Knife focuses on simplicity and basic text formatting
  • richeditor-android offers more advanced features like image insertion
  • richeditor-android has a more extensive API for customization
  • Knife has a smaller footprint and may be easier to integrate for simple use cases

Use Case Recommendations

  • Choose Knife for basic text editing with minimal overhead
  • Opt for richeditor-android when advanced formatting and rich content support are required

Android平台下的富文本解析器,支持Html和Markdown

Pros of RichText

  • More comprehensive text formatting options, including images and tables
  • Better support for HTML parsing and rendering
  • More active development and community support

Cons of RichText

  • Larger library size and potentially higher resource usage
  • Steeper learning curve due to more complex API

Code Comparison

RichText:

RichText
    .fromHtml(htmlString)
    .into(textView);

Knife:

Knife.newInstance()
    .addTag(new BoldTag())
    .addTag(new ItalicTag())
    .setSource(htmlString)
    .parse(textView);

Key Differences

  • RichText offers a more streamlined API for basic usage
  • Knife requires manual tag registration but allows for more customization
  • RichText has built-in support for more HTML elements out of the box

Use Cases

  • RichText: Better for applications requiring extensive HTML rendering
  • Knife: Suitable for simpler text formatting needs with custom tag support

Community and Maintenance

  • RichText: More stars, forks, and recent updates
  • Knife: Less active development, but still maintained

Both libraries provide rich text formatting capabilities for Android, but RichText offers a more comprehensive solution with broader HTML support. Knife, while simpler, provides more flexibility for custom tag implementations.

[暂停维护]一个帮助您完成从缩略视图到原视图无缝过渡转变的神奇框架

Pros of transferee

  • More comprehensive image viewing and transferring functionality
  • Supports various image loading libraries (Glide, Picasso, Fresco)
  • Offers smoother transitions and animations for image viewing

Cons of transferee

  • Larger library size and potentially more complex integration
  • Less focused on text editing features compared to Knife
  • May have a steeper learning curve for basic image viewing tasks

Code Comparison

Knife (Rich text editing):

knife.setTextColor(Color.RED);
knife.setTextBackgroundColor(Color.YELLOW);
knife.setTextSize(20);
knife.setBold();
knife.setItalic();

transferee (Image viewing):

Transferee.getDefault(context)
    .apply(TransferConfig.build()
        .setSourceImageList(imageList)
        .setIndexIndicator(indexIndicator)
        .setProgressIndicator(progressBar)
        .create())
    .show();

Summary

Knife focuses on rich text editing for Android, providing a simple interface for text manipulation. transferee, on the other hand, specializes in image viewing and transferring with smooth transitions and support for various image loading libraries. While Knife is more suitable for text-centric applications, transferee offers a more comprehensive solution for image-heavy apps that require advanced viewing capabilities.

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README

Knife

Android Arsenal

Knife (extend EditText) is a rich text editor component for writing documents in Android.

Just select text and use one line code to style it!

Support Android 4.0+

Example

example.gif

Here has a demo apk, and it's source code, very easy to understand~

More experiments see mthli/Type.

Api

  • bold(boolean valid) bold the selected text.

  • italic(boolean valid) italic the selected text.

  • underline(boolean valid) <u>underline</u> the selected text.

  • strikethrough(boolean valid) strikethrough the selected text.

  • bullet(boolean valid) bullet the selected text.

  • quote(boolean valid) quote the selected text.

  • link(String link) and link(String link, int start, int end) to link the text.

  • contains(int FORMAT) return true if the selected text contains the FORMAT.

  • clearFormats() clear all formats.

  • redo() when text changed, you can redo it!

  • undo() when text change, you can also undo it!

  • fromHtml() import from HTML file.

  • toHtml() export as HTML file.

If you want to get more control of the editable text, just extend KnifeText to get all protected method.

Custom

  • app:bulletColor

  • app:bulletRadius

  • app:bulletGapWidth

  • app:historyEnable true to enable record history, so you can redo() and undo().

  • app:historySize the record max limit.

  • app:linkColor

  • app:linkUnderline true to enable link underline.

  • app:quoteColor

  • app:quoteStripeWidth the quote line width.

  • app:quoteCapWidth

TODO

  • Insert image.

Gradle

At your top-level build.gradle file:

repositories {
    // ...
    maven { url 'https://jitpack.io' }
}

And then at your project build.gradle file:

dependencies {
    compile 'com.github.mthli:Knife:v1.1'
}

Done!

Reference

Thanks

License

Copyright 2015 Matthew Lee

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.