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Get started

Download PDFTron SDKIntegrate with GradleIntegrate manuallyRun samplesAdd license keyQuick start - view a documentProGuardUpdate to latest versionTroubleshooting
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Document Viewer

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Document Viewer components

PDFViewCtrlReflowFloating context menuCustomize floating context menuAnnotation toolbarAnnotation style editorCustomize annotation style editorPage sliderAnnotation listDocument outlineUser bookmark listList containerThumbnail browserAdd pages dialogRotate pages dialogView mode dialogCrop pages dialog
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Annotation and collaboration

OverviewRead only modeDisable annotation creation/editingDefault annotation propertiesAnnotation propertiesEventsOverride annotation handlingShow and hide existing annotationsUndo and redoRealtime collaboration
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Advanced customization

Add a custom view to a pageCreate a custom toolPage coloring modePage fit modePage layout mode
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Conversion

Convert documents to PDFConvert HTML to PDF
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Search

Text search
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Other Frameworks

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Advanced topics

Understand coordinatesDocument savingDocument lockingGenerate page thumbnailsTool class hierarchy
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FAQ

System RequirementsRun project in Android StudioRun project with source codePDFTron full vs. standardLocalizationIcon cheat sheetReduce size of APKEnable multidexOut of memory when rotating device multiple timesReduce memory consumptionDetachCurrentThread warning
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PDF Processing API

What is PDFNet?Opening a documentSerializing (saving) a documentWorking with pagesWorking with Page ContentWorking with BookmarksWorking with Interactive Forms (AcroForms)PDF SecurityLow-level PDF APIError handling
Show and hide existing annotationskeyboard_arrow_down

Show and hide existing annotations

In this document
chevron_rightShow/hide an annotation on
chevron_rightShow/hide all annotations on PDFViewCtrl.

By default, PDFViewCtrl shows all annotations on PDF document. If you want to hide a particular annotation on PDFViewCtrl, or hide all annotations on PDFViewCtrl, you can hide annotations as follows:

linkShow/hide an annotation on PDFViewCtrl.

To show a hidden annotation on PDFViewCtrl, call showAnnotation(Annot):



To hide an annotation on PDFViewCtrl, call hideAnnotation(Annot).



After hide/show an annotation on PDFViewCtrl, You must call update(Annot, int) to redraw the area covered with the given annotation.

linkShow/hide all annotations on PDFViewCtrl.

Alternatively, you can show/hide all annotations on PDFViewCtrl by calling setDrawAnnotations(boolean). This method enables or disables annotations and forms from rendering.

For example, disabling annotations from rendering:



After enabling/disabling annotations from rendering on PDFViewCtrl, You must call update(boolean) to redraw the pdf content.