to top

Summary: Inherited Constants | Ctors | Methods | Inherited Methods | [Expand All]

Added in API level 1

public class

DynamicLayout

extends Layout

java.lang.Object
↳	android.text.Layout
	↳	android.text.DynamicLayout

Class Overview

DynamicLayout is a text layout that updates itself as the text is edited.

This is used by widgets to control text layout. You should not need to use this class directly unless you are implementing your own widget or custom display object, or need to call Canvas.drawText() directly.

Summary

[Expand]

Inherited Constants

From class android.text.Layout

Public Constructors
	DynamicLayout(CharSequence base, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad) Make a layout for the specified text that will be updated as the text is changed.
	DynamicLayout(CharSequence base, CharSequence display, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad) Make a layout for the transformed text (password transformation being the primary example of a transformation) that will be updated as the base text is changed.
	DynamicLayout(CharSequence base, CharSequence display, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad, TextUtils.TruncateAt ellipsize, int ellipsizedWidth) Make a layout for the transformed text (password transformation being the primary example of a transformation) that will be updated as the base text is changed.

Public Methods
int	getBottomPadding() Returns the number of extra pixels of descent padding in the bottom line of the Layout.
int	getEllipsisCount(int line) Returns the number of characters to be ellipsized away, or 0 if no ellipsis is to take place.
int	getEllipsisStart(int line) Return the offset of the first character to be ellipsized away, relative to the start of the line.
int	getEllipsizedWidth() Return the width to which this Layout is ellipsizing, or `getWidth()` if it is not doing anything special.
boolean	getLineContainsTab(int line) Returns whether the specified line contains one or more characters that need to be handled specially, like tabs or emoji.
int	getLineCount() Return the number of lines of text in this layout.
int	getLineDescent(int line) Return the descent of the specified line(0…getLineCount() - 1).
final Layout.Directions	getLineDirections(int line) Returns the directional run information for the specified line.
int	getLineStart(int line) Return the text offset of the beginning of the specified line ( 0…getLineCount()).
int	getLineTop(int line) Return the vertical position of the top of the specified line (0…getLineCount()).
int	getParagraphDirection(int line) Returns the primary directionality of the paragraph containing the specified line, either 1 for left-to-right lines, or -1 for right-to-left lines (see `DIR_LEFT_TO_RIGHT`, `DIR_RIGHT_TO_LEFT`).
int	getTopPadding() Returns the (negative) number of extra pixels of ascent padding in the top line of the Layout.

[Expand]

Inherited Methods

From class android.text.Layout

void	draw(Canvas c) Draw this Layout on the specified Canvas.
void	draw(Canvas canvas, Path highlight, Paint highlightPaint, int cursorOffsetVertical) Draw this Layout on the specified canvas, with the highlight path drawn between the background and the text.
final Layout.Alignment	getAlignment() Return the base alignment of this layout.
abstract int	getBottomPadding() Returns the number of extra pixels of descent padding in the bottom line of the Layout.
void	getCursorPath(int point, Path dest, CharSequence editingBuffer) Fills in the specified Path with a representation of a cursor at the specified offset.
static float	getDesiredWidth(CharSequence source, int start, int end, TextPaint paint) Return how wide a layout must be in order to display the specified text slice with one line per paragraph.
static float	getDesiredWidth(CharSequence source, TextPaint paint) Return how wide a layout must be in order to display the specified text with one line per paragraph.
abstract int	getEllipsisCount(int line) Returns the number of characters to be ellipsized away, or 0 if no ellipsis is to take place.
abstract int	getEllipsisStart(int line) Return the offset of the first character to be ellipsized away, relative to the start of the line.
int	getEllipsizedWidth() Return the width to which this Layout is ellipsizing, or `getWidth()` if it is not doing anything special.
int	getHeight() Return the total height of this layout.
final int	getLineAscent(int line) Get the ascent of the text on the specified line.
final int	getLineBaseline(int line) Return the vertical position of the baseline of the specified line.
final int	getLineBottom(int line) Return the vertical position of the bottom of the specified line.
int	getLineBounds(int line, Rect bounds) Return the baseline for the specified line (0…getLineCount() - 1) If bounds is not null, return the top, left, right, bottom extents of the specified line in it.
abstract boolean	getLineContainsTab(int line) Returns whether the specified line contains one or more characters that need to be handled specially, like tabs or emoji.
abstract int	getLineCount() Return the number of lines of text in this layout.
abstract int	getLineDescent(int line) Return the descent of the specified line(0…getLineCount() - 1).
abstract Layout.Directions	getLineDirections(int line) Returns the directional run information for the specified line.
final int	getLineEnd(int line) Return the text offset after the last character on the specified line.
int	getLineForOffset(int offset) Get the line number on which the specified text offset appears.
int	getLineForVertical(int vertical) Get the line number corresponding to the specified vertical position.
float	getLineLeft(int line) Get the leftmost position that should be exposed for horizontal scrolling on the specified line.
float	getLineMax(int line) Gets the unsigned horizontal extent of the specified line, including leading margin indent, but excluding trailing whitespace.
float	getLineRight(int line) Get the rightmost position that should be exposed for horizontal scrolling on the specified line.
abstract int	getLineStart(int line) Return the text offset of the beginning of the specified line ( 0…getLineCount()).
abstract int	getLineTop(int line) Return the vertical position of the top of the specified line (0…getLineCount()).
int	getLineVisibleEnd(int line) Return the text offset after the last visible character (so whitespace is not counted) on the specified line.
float	getLineWidth(int line) Gets the unsigned horizontal extent of the specified line, including leading margin indent and trailing whitespace.
int	getOffsetForHorizontal(int line, float horiz) Get the character offset on the specified line whose position is closest to the specified horizontal position.
int	getOffsetToLeftOf(int offset)
int	getOffsetToRightOf(int offset)
final TextPaint	getPaint() Return the base Paint properties for this layout.
final Layout.Alignment	getParagraphAlignment(int line) Get the alignment of the specified paragraph, taking into account markup attached to it.
abstract int	getParagraphDirection(int line) Returns the primary directionality of the paragraph containing the specified line, either 1 for left-to-right lines, or -1 for right-to-left lines (see `DIR_LEFT_TO_RIGHT`, `DIR_RIGHT_TO_LEFT`).
final int	getParagraphLeft(int line) Get the left edge of the specified paragraph, inset by left margins.
final int	getParagraphRight(int line) Get the right edge of the specified paragraph, inset by right margins.
float	getPrimaryHorizontal(int offset) Get the primary horizontal position for the specified text offset.
float	getSecondaryHorizontal(int offset) Get the secondary horizontal position for the specified text offset.
void	getSelectionPath(int start, int end, Path dest) Fills in the specified Path with a representation of a highlight between the specified offsets.
final float	getSpacingAdd() Return the number of units of leading that are added to each line.
final float	getSpacingMultiplier() Return what the text height is multiplied by to get the line height.
final CharSequence	getText() Return the text that is displayed by this Layout.
abstract int	getTopPadding() Returns the (negative) number of extra pixels of ascent padding in the top line of the Layout.
final int	getWidth() Return the width of this layout.
final void	increaseWidthTo(int wid) Increase the width of this layout to the specified width.
boolean	isRtlCharAt(int offset) Returns true if the character at offset is right to left (RTL).
final boolean	isSpanned()

From class java.lang.Object

Object	clone() Creates and returns a copy of this `Object`.
boolean	equals(Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize() Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class<?>	getClass() Returns the unique instance of `Class` that represents this object's class.
int	hashCode() Returns an integer hash code for this object.
final void	notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString() Returns a string containing a concise, human-readable description of this object.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait(long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public DynamicLayout (CharSequence base, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad)

Added in API level 1

Make a layout for the specified text that will be updated as the text is changed.

public DynamicLayout (CharSequence base, CharSequence display, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad)

Added in API level 1

Make a layout for the transformed text (password transformation being the primary example of a transformation) that will be updated as the base text is changed.

public DynamicLayout (CharSequence base, CharSequence display, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad, TextUtils.TruncateAt ellipsize, int ellipsizedWidth)

Added in API level 1

Make a layout for the transformed text (password transformation being the primary example of a transformation) that will be updated as the base text is changed. If ellipsize is non-null, the Layout will ellipsize the text down to ellipsizedWidth.

Public Methods

public int getBottomPadding ()

Added in API level 1

Returns the number of extra pixels of descent padding in the bottom line of the Layout.

public int getEllipsisCount (int line)

Added in API level 1

Returns the number of characters to be ellipsized away, or 0 if no ellipsis is to take place.

public int getEllipsisStart (int line)

Added in API level 1

Return the offset of the first character to be ellipsized away, relative to the start of the line. (So 0 if the beginning of the line is ellipsized, not getLineStart().)

public int getEllipsizedWidth ()

Added in API level 1

Return the width to which this Layout is ellipsizing, or getWidth() if it is not doing anything special.

public boolean getLineContainsTab (int line)

Added in API level 1

Returns whether the specified line contains one or more characters that need to be handled specially, like tabs or emoji.

public int getLineCount ()

Added in API level 1

Return the number of lines of text in this layout.

public int getLineDescent (int line)

Added in API level 1

Return the descent of the specified line(0…getLineCount() - 1).

public final Layout.Directions getLineDirections (int line)

Added in API level 1

Returns the directional run information for the specified line. The array alternates counts of characters in left-to-right and right-to-left segments of the line.

NOTE: this is inadequate to support bidirectional text, and will change.

public int getLineStart (int line)

Added in API level 1

Return the text offset of the beginning of the specified line ( 0…getLineCount()). If the specified line is equal to the line count, returns the length of the text.

public int getLineTop (int line)

Added in API level 1

Return the vertical position of the top of the specified line (0…getLineCount()). If the specified line is equal to the line count, returns the bottom of the last line.

public int getParagraphDirection (int line)

Added in API level 1

Returns the primary directionality of the paragraph containing the specified line, either 1 for left-to-right lines, or -1 for right-to-left lines (see DIR_LEFT_TO_RIGHT, DIR_RIGHT_TO_LEFT).

public int getTopPadding ()

Added in API level 1

Returns the (negative) number of extra pixels of ascent padding in the top line of the Layout.

Results

Interfaces

Classes

Enums

DynamicLayout

Class Overview

Summary

Public Constructors

public DynamicLayout (CharSequence base, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad)

public DynamicLayout (CharSequence base, CharSequence display, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad)

public DynamicLayout (CharSequence base, CharSequence display, TextPaint paint, int width, Layout.Alignment align, float spacingmult, float spacingadd, boolean includepad, TextUtils.TruncateAt ellipsize, int ellipsizedWidth)

Public Methods

public int getBottomPadding ()

public int getEllipsisCount (int line)

public int getEllipsisStart (int line)

public int getEllipsizedWidth ()

public boolean getLineContainsTab (int line)

public int getLineCount ()

public int getLineDescent (int line)

public final Layout.Directions getLineDirections (int line)

public int getLineStart (int line)

public int getLineTop (int line)

public int getParagraphDirection (int line)

public int getTopPadding ()