
public final class SpanBackgroundHelper

Helper class to draw multi-line rounded background to certain parts of a text. The start/end positions of the backgrounds are annotated with android.text.Annotation class. Each annotation should have the annotation key set to rounded.

i.e.:

    <!--without the quotes at the begining and end Android strips the whitespace and also starts
        the annotation at the wrong position-->
    <string name="ltr">"this is <annotation key="rounded">a regular</annotation> paragraph."</string>

Note: BiDi text is not supported.

Field Summary

Fields
Modifier and Type	Field	Description
`private final Integer`	`horizontalPadding`
`private final Integer`	`verticalPadding`

Constructor Summary

Constructors
Constructor	Description
`SpanBackgroundHelper(Class<?> spanType, Integer horizontalPadding, Integer verticalPadding, Drawable drawable, Drawable drawableLeft, Drawable drawableMid, Drawable drawableRight)`

Method Summary

Modifier and Type	Method	Description
`final Integer`	`getHorizontalPadding()`
`final Integer`	`getVerticalPadding()`
`final Unit`	`draw(Canvas canvas, Spanned text, Layout layout)`	Call this function during onDraw of another widget such as TextView.
`final Unit`	`clearCachedPositions()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SpanBackgroundHelper
```
SpanBackgroundHelper(Class<?> spanType, Integer horizontalPadding, Integer verticalPadding, Drawable drawable, Drawable drawableLeft, Drawable drawableMid, Drawable drawableRight)
```
    Parameters:
    
    horizontalPadding - the padding to be applied to left & right of the background
    
    verticalPadding - the padding to be applied to top & bottom of the background
    
    drawable - the drawable used to draw the background
    
    drawableLeft - the drawable used to draw left edge of the background
    
    drawableMid - the drawable used to draw for whole line
    
    drawableRight - the drawable used to draw right edge of the background
- Method Detail
  - getHorizontalPadding
```
 final Integer getHorizontalPadding()
```
  - getVerticalPadding
```
 final Integer getVerticalPadding()
```
  - draw
```
 final Unit draw(Canvas canvas, Spanned text, Layout layout)
```
    Call this function during onDraw of another widget such as TextView.
    
    Parameters:
    
    canvas - Canvas to draw onto
    
    layout - Layout that contains the text
  - clearCachedPositions
```
 final Unit clearCachedPositions()
```

Class SpanBackgroundHelper

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SpanBackgroundHelper

Method Detail

getHorizontalPadding

getVerticalPadding

draw

clearCachedPositions