RecognitionContext
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Information about the context in which an ink has been drawn.
Pass this object to a
DigitalInkRecognizer alongside an ink to improve the recognition quality.
Public Constructor Summary
Inherited Method Summary
From class java.lang.Object
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Object
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clone()
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| boolean |
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| void |
finalize()
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final Class<?>
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getClass()
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| int |
hashCode()
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| final void |
notify()
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| final void |
notifyAll()
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String
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toString()
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| final void |
wait(long arg0, int arg1)
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| final void |
wait(long arg0)
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| final void |
wait()
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Public Constructors
public RecognitionContext ()
Public Methods
public abstract String getPreContext ()
Characters immediately before the position where the recognized text should be
inserted.
Example: a text field contains "hello", with the cursor right after "o". The user
handwrites something that looks like "world". If the pre-context is set to "hello", the
recognition model will be able to output " world", with a leading space.
If the text field contain "hello" with the cursor between "e" and the first "l",
then the pre-context must be set to "he".
A good rule of thumb for pre-context length is: as many characters as possible,
including spaces, until around 20. The optimal number depends on the exact recognition
model that is used. Getting the best speed/accuracy tradeoff may require a bit of
tuning.
public abstract WritingArea
getWritingArea ()
Size of the writing area.
This is used by some recognition models for disambiguation. Example: lowercase vs
uppercase ("o" vs "O") .
See also WritingArea.
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Last updated 2025-08-20 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-20 UTC."],[],[],null,["# RecognitionContext\n\npublic abstract class **RecognitionContext** extends [Object](//developer.android.com/reference/java/lang/Object.html) \nInformation about the context in which an ink has been drawn.\n\nPass this object to a [DigitalInkRecognizer](/android/reference/com/google/mlkit/vision/digitalink/recognition/DigitalInkRecognizer) alongside an ink to improve the recognition quality. \n\n### Nested Class Summary\n\n|-------|---|---|-----------------------------------------------------------------------------------------------------------------------------------|\n| class | [RecognitionContext.Builder](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext.Builder) || Builder for the [RecognitionContext](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext) class. |\n\n### Public Constructor Summary\n\n|---|-----------------------------------------------------------------------------------------------------------------------------------|\n| | [RecognitionContext](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext#RecognitionContext())() |\n\n### Public Method Summary\n\n|-----------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| static [RecognitionContext.Builder](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext.Builder) | [builder](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext#builder())() Returns the final [RecognitionContext](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext) object. |\n| abstract [String](//developer.android.com/reference/java/lang/String.html) | [getPreContext](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext#getPreContext())() Characters immediately before the position where the recognized text should be inserted. |\n| abstract [WritingArea](/android/reference/com/google/mlkit/vision/digitalink/recognition/WritingArea) | [getWritingArea](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext#getWritingArea())() Size of the writing area. |\n\n### Inherited Method Summary\n\nFrom class java.lang.Object \n\n|----------------------------------------------------------------------------|--------------------------------------------------------------------------------|\n| [Object](//developer.android.com/reference/java/lang/Object.html) | clone() |\n| boolean | equals([Object](//developer.android.com/reference/java/lang/Object.html) arg0) |\n| void | finalize() |\n| final [Class](//developer.android.com/reference/java/lang/Class.html)\\\u003c?\\\u003e | getClass() |\n| int | hashCode() |\n| final void | notify() |\n| final void | notifyAll() |\n| [String](//developer.android.com/reference/java/lang/String.html) | toString() |\n| final void | wait(long arg0, int arg1) |\n| final void | wait(long arg0) |\n| final void | wait() |\n\nPublic Constructors\n-------------------\n\n#### public **RecognitionContext** ()\n\nPublic Methods\n--------------\n\n#### public static [RecognitionContext.Builder](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext.Builder) **builder**\n()\n\nReturns the final [RecognitionContext](/android/reference/com/google/mlkit/vision/digitalink/recognition/RecognitionContext) object. \n\n#### public abstract [String](//developer.android.com/reference/java/lang/String.html) **getPreContext** ()\n\nCharacters immediately before the position where the recognized text should be\ninserted.\n\nExample: a text field contains \"hello\", with the cursor right after \"o\". The user\nhandwrites something that looks like \"world\". If the pre-context is set to \"hello\", the\nrecognition model will be able to output \" world\", with a leading space.\n\nIf the text field contain \"hello\" with the cursor between \"e\" and the first \"l\",\nthen the pre-context must be set to \"he\".\n\nA good rule of thumb for pre-context length is: as many characters as possible,\nincluding spaces, until around 20. The optimal number depends on the exact recognition\nmodel that is used. Getting the best speed/accuracy tradeoff may require a bit of\ntuning. \n\n#### public abstract [WritingArea](/android/reference/com/google/mlkit/vision/digitalink/recognition/WritingArea)\n**getWritingArea** ()\n\nSize of the writing area.\n\nThis is used by some recognition models for disambiguation. Example: lowercase vs\nuppercase (\"o\" vs \"O\") .\n\nSee also [WritingArea](/android/reference/com/google/mlkit/vision/digitalink/recognition/WritingArea)."]]
