Android Spans

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Language
Java
Version
N/A
Created
Sep 24, 2017
Updated
Sep 25, 2017 (Retired)
Owner
Simon Marquis (SimonMarquis)
Contributor
Simon Marquis (SimonMarquis)
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Android Spans

Kotlin and Java wrappers around SpannableStringBuilder. Inspired by JakeWharton's Truss and Kotlin's kotlinx.html

Supported Spans:

AbsoluteSizeSpanAlignmentSpanBackgroundColorSpanBulletSpanClickableSpanDrawableMarginSpanForegroundColorSpanIconMarginSpanImageSpanLeadingMarginSpanMaskFilterSpanQuoteSpanRelativeSizeSpanScaleXSpanStrikethroughSpanStyleSpanSubscriptSpanSuperscriptSpanTextAppearanceSpanTypefaceSpanURLSpanUnderlineSpan



  • Advanced example

     val span = span {
         text("Regular text\n")
         +"Or with the 'plus operator'\n"
    
         /*Nested spans*/
         bold {
             backgroundColor(Color.BLACK) {
                 foregroundColor(Color.BLUE) {
                     +"Nested spans"
                 }
             }
             +" works too!\n"
         }
    
         /*Click callback*/
         quote(Color.RED) {
             url("https://google.com", { println(it.url); /*redirect?*/ true }) {
                 monospace {
                     +"Google"
                 }
             }
         }
    
         /*Anonymous Span classes*/
         strikethrough(object : StrikethroughSpan() {
             override fun updateDrawState(ds: TextPaint?) {
                 super.updateDrawState(ds)
                 ds?.alpha = 50
             }
         }) {
             +"\nstrikethrough with alpha"
         }
     }
     textView.text = span.build()
  • Java

    • Simple example: Spans are hard!

       Span span = Span.create(
           "Spans ",
           bold(
               "are ",
               strikethrough("hard?")
           )
       );
       textView.setText(span.build());
    • Advanced example

       Span span = Span.create(
           text("Regular text\n"),
           "Or with the String\n",
      
           /*Nested spans*/
           bold(
               backgroundColor(Color.BLACK,
                   foregroundColor(Color.BLUE,
                       text("Nested spans")
                   )),
               text(" works too!\n")
           ),
      
           /*Click callback*/
           quote(
               Color.RED,
               url(
                   "https://google.com",
                   monospace(
                       text("Google")
                   )
               ).onClick(new Span.Node.UrlSpanNode.OnClickCallback() {
                   @Override
                   public boolean onClick(URLSpan span) {
                       System.out.println(span.getURL());
                       return true;
                   }
               })
           ),
      
           /*Anonymous Span classes*/
           span(new StrikethroughSpan() {
                    @Override
                    public void updateDrawState(TextPaint ds) {
                     super.updateDrawState(ds);
                       ds.setAlpha(50);
                   }
               },
               text("\nstrikethrough with alpha")
           )
       );
       textView.setText(span.build());

    License

    Copyright 2017 Simon Marquis
    
    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.