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Getting started

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Running samplesTry demo in your projectDownloading PDFTronIntegrating PDFTron via GradleManually integrating PDFTronUpgradingAdding PDFTron license keyUsing ProGuardTroubleshooting integration

Fundamentals

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Document lockingSaving PDF documentsUnderstanding coordinates

Basics

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Using an ActivityUsing a FragmentUsing PDFViewCtrlViewer configConverting and viewing other document typesConverting HTML to PDF

Viewer

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PDFViewCtrl color modesPDFViewCtrl page view modePDFViewCtrl page presentation modeGenerating thumbnails in PDF

Features

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Day/Night themesUndo and redoText searchAnnotation syncingRotating PDF pagesPDFViewCtrl read onlyUsing PDFViewCtrl with minimum memory

Tools

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Tools overviewSetting Up ToolManagerChanging and disabling toolsIntercepting annotation handlingToolManager eventsDefault annotation propertiesTool subclasses

Annotations

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Deleting annotationsAnnotation styleShow/hide annotations

UI components

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Quick menuAnnotation toolbarAnnotation style dialogThumbnail sliderAnnotations listOutline listUser bookmarks listBookmarks dialogPage thumbnails dialogAdd page dialogRotate pages dialogView mode dialogCrop page dialogReflow

Advanced

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Adding a custom view to a PDF pageCustom toolCustomizing quick menuCustomizing annotation style dialog

FAQ

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Running project in Android StudioSystem RequirementsPDFTron full vs. standardLocalizationIcon cheat sheetRunning sample with sourceReducing size of APKEnable multidexOut of memory when rotating device multiple timesDetachCurrentThread warning

PDF Processing API

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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
Rotating PDF pageskeyboard_arrow_down

Rotating PDF pages

In this document
chevron_rightRotating PDFViewCtrl
chevron_rightRotating a PDF page
chevron_rightRotating PDF pages
PDFTron's library has a rotate pages dialog which allows users to rotate pages easily. For more information, see: rotate pages dialog.

There are two options for rotating PDF pages. The first is rotating PDFViewCtrl, it will rotate all PDF pages temporarily. The second is rotating PDF pages using Page class, it will rotate selected PDF pages permanently.

linkRotating PDFViewCtrl

If you want to rotate a PDFViewCtrl by 90 degrees clockwisely, just simply call PDFViewCtrl.rotateClockwise (). If you want to rotate the PDFViewCtrl by 90 degrees counter clockwisely, call PDFViewCtrl.rotateCounterClockwise (). After rotation, update the PDFViewCtrl pages layout by calling PDFViewCtrl.updatePageLayout().



where pdfViewCtrl is the instance of PDFViewCtrl.

linkRotating a PDF page

To rotate a PDF page by 90 degrees, call Page.setRotation(int). The parameter of this method is the rotation value, which is one of [0, 1, 2, 3]. It represents [0 degree, 90 degree, 180 degree, 270 degree] correspondingly. After rotation, update the PDFViewCtrl pages layout by calling PDFViewCtrl.updatePageLayout().

To rotate a PDF page, you must lock PDFViewCtrl first, see: document locking.


linkRotating PDF pages

To rotate PDF pages, traverse each page and call Page.setRotation(int). The following example shows how to rotate all pages of a PDF document.