IconMarginSpan
public
class
IconMarginSpan
extends Object
implements
LeadingMarginSpan,
LineHeightSpan
| java.lang.Object | |
| ↳ | android.text.style.IconMarginSpan |
Paragraph affecting span, that draws a bitmap at the beginning of a text. The span also allows setting a padding between the bitmap and the text. The default value of the padding is 0px. The span should be attached from the first character of the text.
For example, an IconMarginSpan with a bitmap and a padding of 30px can be set
like this:
SpannableString string = new SpannableString("Text with icon and padding");
string.setSpan(new IconMarginSpan(bitmap, 30), 0, string.length(),
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
IconMarginSpanSummary
Public constructors | |
|---|---|
IconMarginSpan(Bitmap bitmap)
Creates an |
|
IconMarginSpan(Bitmap bitmap, int pad)
Creates an |
|
Public methods | |
|---|---|
void
|
chooseHeight(CharSequence text, int start, int end, int istartv, int v, Paint.FontMetricsInt fm)
Classes that implement this should define how the height is being calculated. |
void
|
drawLeadingMargin(Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom, CharSequence text, int start, int end, boolean first, Layout layout)
Renders the leading margin. |
Bitmap
|
getBitmap()
Returns the bitmap to be used at the beginning of the text |
int
|
getLeadingMargin(boolean first)
Returns the amount by which to adjust the leading margin. |
int
|
getPadding()
Returns the padding width between the bitmap and the text. |
String
|
toString()
Returns a string representation of the object. |
Inherited methods | |
|---|---|
Public constructors
IconMarginSpan
public IconMarginSpan (Bitmap bitmap)
Creates an IconMarginSpan from a Bitmap.
| Parameters | |
|---|---|
bitmap |
Bitmap: bitmap to be rendered at the beginning of the text
This value cannot be null. |
IconMarginSpan
public IconMarginSpan (Bitmap bitmap, int pad)
Creates an IconMarginSpan from a Bitmap.
| Parameters | |
|---|---|
bitmap |
Bitmap: bitmap to be rendered at the beginning of the text
This value cannot be null. |
pad |
int: padding width, in pixels, between the bitmap and the text
Value is 0 or greater |
Public methods
chooseHeight
public void chooseHeight (CharSequence text, int start, int end, int istartv, int v, Paint.FontMetricsInt fm)
Classes that implement this should define how the height is being calculated.
| Parameters | |
|---|---|
text |
CharSequence: the text |
start |
int: the start of the line |
end |
int: the end of the line |
istartv |
int: the start of the span |
v |
int: the line height |
fm |
Paint.FontMetricsInt: font metrics of the paint, in integers |
drawLeadingMargin
public void drawLeadingMargin (Canvas c, Paint p, int x, int dir, int top, int baseline, int bottom, CharSequence text, int start, int end, boolean first, Layout layout)
Renders the leading margin. This is called before the margin has been
adjusted by the value returned by getLeadingMargin(boolean).
| Parameters | |
|---|---|
c |
Canvas: the canvas |
p |
Paint: the paint. The this should be left unchanged on exit. |
x |
int: the current position of the margin |
dir |
int: the base direction of the paragraph; if negative, the margin
is to the right of the text, otherwise it is to the left. |
top |
int: the top of the line |
baseline |
int: the baseline of the line |
bottom |
int: the bottom of the line |
text |
CharSequence: the text |
start |
int: the start of the line |
end |
int: the end of the line |
first |
boolean: true if this is the first line of its paragraph |
layout |
Layout: the layout containing this line |
getBitmap
public Bitmap getBitmap ()
Returns the bitmap to be used at the beginning of the text
| Returns | |
|---|---|
Bitmap |
a bitmap
This value cannot be null. |
getLeadingMargin
public int getLeadingMargin (boolean first)
Returns the amount by which to adjust the leading margin. Positive values move away from the leading edge of the paragraph, negative values move towards it.
| Parameters | |
|---|---|
first |
boolean: true if the request is for the first line of a paragraph,
false for subsequent lines |
| Returns | |
|---|---|
int |
the offset for the margin. |
getPadding
public int getPadding ()
Returns the padding width between the bitmap and the text.
This units of this value are pixels.
| Returns | |
|---|---|
int |
a padding width in pixels This units of this value are pixels. {} |
toString
public String toString ()
Returns a string representation of the object. In general, the
toString method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
| Returns | |
|---|---|
String |
a string representation of the object. |