Added in API level 29

Summary: Nested Classes | Methods | Inherited Methods

Font

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Kotlin |Java

public final class Font
extends Object

java.lang.Object
↳	android.graphics.fonts.Font

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A font class can be used for creating FontFamily.

Summary

Nested classes
class	Font.Builder A builder class for creating new Font.

Public methods
boolean	equals(Object o) Indicates whether some other object is "equal to" this one.
FontVariationAxis[]	getAxes() Get a font variation settings associated with this font
ByteBuffer	getBuffer() Returns a font file buffer.
File	getFile() Returns a file path of this font.
float	getGlyphBounds(int glyphId, Paint paint, RectF outBoundingBox) Retrieve the glyph horizontal advance and bounding box.
LocaleList	getLocaleList() Get a locale list of this font.
void	getMetrics(Paint paint, Paint.FontMetrics outMetrics) Retrieve the font metrics information.
int	getSourceIdentifier() Returns the unique ID of the source font data.
FontStyle	getStyle() Get a style associated with this font.
int	getTtcIndex() Get a TTC index value associated with this font.
int	hashCode() Returns a hash code value for the object.
String	toString() Returns a string representation of the object.

Inherited methods

From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public methods

equals

Added in API level 29

public boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

• It is reflexive: for any non-null reference value x, x.equals(x) should return true.
• It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
• It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
• It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
• For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
o	Object: This value may be null.

Returns
boolean	true if this object is the same as the obj argument; false otherwise.

getAxes

Added in API level 29

public FontVariationAxis[] getAxes ()

Get a font variation settings associated with this font

Returns
FontVariationAxis[]	font variation settings This value may be null.

See also:

• Font.Builder.setFontVariationSettings(String)
• Font.Builder.setFontVariationSettings(FontVariationAxis[])

getBuffer

Added in API level 29

public ByteBuffer getBuffer ()

Returns a font file buffer. Duplicate before reading values by ByteBuffer.duplicate() for avoiding unexpected reading position sharing.

Returns
ByteBuffer	a font buffer This value cannot be null.

getFile

Added in API level 29

public File getFile ()

Returns a file path of this font. This returns null if this font is not created from regular file.

Returns
File	a file path of the font

getGlyphBounds

Added in API level 31

public float getGlyphBounds (int glyphId, 
                Paint paint, 
                RectF outBoundingBox)

Retrieve the glyph horizontal advance and bounding box. Note that Typeface in Paint is ignored.

Parameters
glyphId	int: a glyph ID Value is 0 or greater
paint	Paint: a paint object used for resolving glyph style This value cannot be null.
outBoundingBox	RectF: a nullable destination object. If null is passed, this function just return the horizontal advance. If non-null is passed, this function fills bounding box information to this object.

Returns
float	the amount of horizontal advance in pixels

getLocaleList

Added in API level 29

public LocaleList getLocaleList ()

Get a locale list of this font. This is always empty if this font is not a system font.

Returns
LocaleList	a locale list This value cannot be null.

getMetrics

Added in API level 31

public void getMetrics (Paint paint, 
                Paint.FontMetrics outMetrics)

Retrieve the font metrics information. Note that Typeface in Paint is ignored.

Parameters
paint	Paint: a paint object used for retrieving font metrics. This value cannot be null.
outMetrics	Paint.FontMetrics: a nullable destination object. If null is passed, this function only retrieve recommended interline spacing. If non-null is passed, this function fills to font metrics to it.

See also:

• Paint.getFontMetrics()
• Paint.getFontMetricsInt()

getSourceIdentifier

Added in API level 31

public int getSourceIdentifier ()

Returns the unique ID of the source font data. You can use this identifier as a key of the cache or checking if two fonts can be interpolated with font variation settings.

 
   // Following three Fonts, fontA, fontB, fontC have the same identifier.
   Font fontA = new Font.Builder("/path/to/font").build();
   Font fontB = new Font.Builder(fontA).setTtcIndex(1).build();
   Font fontC = new Font.Builder(fontB).setFontVariationSettings("'wght' 700).build();

   // Following fontD has the different identifier from above three.
   Font fontD = new Font.Builder("/path/to/another/font").build();

   // Following fontE has different identifier from above four even the font path is the same.
   // To get the same identifier, please create new Font instance from existing fonts.
   Font fontE = new Font.Builder("/path/to/font").build();
 
 

Here is an example of caching font object that has

 
   private LongSparseArray> mCache = new LongSparseArray<>();

   private Font getFontWeightVariation(Font font, int weight) {
       // Different collection index is treated as different font.
       long key = ((long) font.getSourceIdentifier()) << 32 | (long) font.getTtcIndex();

       SparseArray weightCache = mCache.get(key);
       if (weightCache == null) {
          weightCache = new SparseArray<>();
          mCache.put(key, weightCache);
       }

       Font cachedFont = weightCache.get(weight);
       if (cachedFont != null) {
         return cachedFont;
       }

       Font newFont = new Font.Builder(cachedFont)
           .setFontVariationSettings("'wght' " + weight);
           .build();

       weightCache.put(weight, newFont);
       return newFont;
   }
 
 

Returns
int	an unique identifier for the font source data.

getStyle

Added in API level 29

public FontStyle getStyle ()

Get a style associated with this font.

Returns
FontStyle	a font style This value cannot be null.

See also:

• Font.Builder.setWeight(int)
• Font.Builder.setSlant(int)

getTtcIndex

Added in API level 29

public int getTtcIndex ()

Get a TTC index value associated with this font. If TTF/OTF file is provided, this value is always 0.

Returns
int	a TTC index value Value is 0 or greater

See also:

• Font.Builder.setTtcIndex(int)

hashCode

Added in API level 29

public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

• Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
• If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
• It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns
int	a hash code value for this object.

toString

Added in API level 29

public String toString ()

Returns a string representation of the object.

Returns
String	a string representation of the object.