Some test text!

Getting started

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

Fundamentals

keyboard_arrow_down
Document lockingSaving PDF documentsUnderstanding coordinates

Basics

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

Viewer

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

Features

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

Tools

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

Annotations

keyboard_arrow_down
Deleting annotationsAnnotation styleShow/hide annotations

UI components

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

Advanced

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

FAQ

keyboard_arrow_down
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

keyboard_arrow_down
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
Using PDFViewCtrl with minimum memorykeyboard_arrow_down

Using PDFViewCtrl with minimum memory

In this document
chevron_rightIncreasing Android heap size

In order to achieve smoother viewing experience, PDFViewCtrl keeps invisible content. However, keeping invisible content increases memory usage. Android sets an upper bound on the VM heap size allowed for an app. By default, PDFViewCtrl is set to use a quarter of maximum VM heap size for keeping visible and invisible content. Based on the memory footprint of your app, you may want to customize it.

In order to customize the memory usage, call PDFViewCtrl.setRenderedContentCacheSize(long):



where pdfViewCtrl is an instance of PDFViewCtrl.

If you want to minimize the heap memory usage at the cost of viewing experience quality, you can set allowed_max to 0. PDFViewCtrl will not keep any invisible content.
setRenderedContentCacheSize(long) only controls the memory usage of VM heap size by PDFViewCtrl, but not the native memory that PDFViewCtrl might use.

linkIncreasing Android heap size

On Android 3.0 and above, you can also increase the allowed heap size of an app.

In your app AndroidManifest.xml file, add android:largeHeap="true" to <application> tag:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  ...
  >
  <application
    ...
    android:largeHeap="true"
    >
    ...
  </application>

</manifest>