Android PdfViewer

Library for displaying PDF documents on Android, with animations, gestures, zoom and double tap support. It is based on PdfiumAndroid for decoding PDF files. Works on API 11 and higher. Licensed under Apache License 2.0.

What's new in 1.1.0?

• added method pdfView.fromUri(Uri) for opening files from content providers
• updated PdfiumAndroid to 1.0.3, which should fix bug with exception
• updated sample with demonstration of fromUri() method
• some minor fixes

Version 1.1.1 fixes bug with strange behavior when indices passed to .pages() don't start with 0.

Next release is coming soon, it will introduce continuous scroll through whole document and some incompatibilities with current API (only few small).

Installation

Add to build.gradle:

compile 'com.github.barteksc:android-pdf-viewer:1.1.1'

Library is available in jcenter repository, probably it'll be in Maven Central soon.

Include PDFView in your layout

<com.github.barteksc.pdfviewer.PDFView
        android:id="@+id/pdfView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

Load a PDF file

All available options with default values:

pdfView.fromAsset(pdfName)
    .pages(0, 2, 1, 3, 3, 3) //all pages are displayed by default
    .enableSwipe(true)
    .enableDoubletap(true)
    .swipeVertical(false)
    .defaultPage(1)
    .showMinimap(false)
    .onDraw(onDrawListener)
    .onLoad(onLoadCompleteListener)
    .onPageChange(onPageChangeListener)
    .onError(onErrorListener)
    .load();

• enableSwipe is optional, it allows you to block changing pages using swipe
• pages is optional, it allows you to filter and order the pages of the PDF as you need
• onDraw is also optional, and allows you to draw something on a provided canvas, above the current page

Show scrollbar

Use ScrollBar class to place scrollbar view near PDFView

1. in layout XML (it's important that the parent view is RelativeLayout)

   <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent">
   
       <com.github.barteksc.pdfviewer.PDFView
           android:id="@+id/pdfView"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:layout_toLeftOf="@+id/scrollBar"/>
   
       <com.github.barteksc.pdfviewer.ScrollBar
           android:id="@+id/scrollBar"
           android:layout_width="wrap_content"
           android:layout_height="match_parent"
           android:layout_alignParentRight="true"
           android:layout_alignParentEnd="true" />
   
   </RelativeLayout>

2. in activity or fragment

   @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
   
           ...
   
           PDFView pdfView = (PDFView) findViewById(R.id.pdfView);
           ScrollBar scrollBar = (ScrollBar) findViewById(R.id.scrollBar);
           pdfView.setScrollBar(scrollBar);
       }

Scrollbar styling:

    <com.github.barteksc.pdfviewpager.view.ScrollBar
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        app:sb_handlerColor="..." <!-- scrollbar handler color -->
        app:sb_indicatorColor="..." <!-- background color of current page indicator -->
        app:sb_indicatorTextColor="..." <!-- text color of current page indicator -->
        android:background="..." <!-- scrollbar background -->
        />

ScrollBarPageIndicator is added to scrollbar automatically and is shown while dragging scrollbar handler, displaying number of page on current position.

Additional options

Bitmap quality

By default, generated bitmaps are compressed with RGB_565 format to reduce memory consumption. Rendering with ARGB_8888 can be forced by using pdfView.useBestQuality(true) method.

Double tap zooming

There are three zoom levels: min (default 1), mid (default 1.75) and max (default 3). On first double tap, view is zoomed to mid level, on second to max level, and on third returns to min level. If you are between mid and max levels, double tapping causes zooming to max and so on.

Zoom levels can be changed using following methods:

void setMinZoom(float zoom);
void setMidZoom(float zoom);
void setMaxZoom(float zoom);

Possible questions

Why resulting apk is so big?

Android PdfViewer depends on PdfiumAndroid, which is set of native libraries (almost 16 MB) for many architectures. Apk must contain all this libraries to run on every device available on market. Fortunately, Google Play allows us to upload multiple apks, e.g. one per every architecture. There is good article on automatically splitting your application into multiple apks, available here. Most important section is Improving multiple APKs creation and versionCode handling with APK Splits, but whole article is worth reading. You only need to do this in your application, no need for forking PdfiumAndroid or so.

One more thing

If you have any suggestions on making this lib better, write me, create issue or write some code and send pull request.

License

Created with the help of android-pdfview by Joan Zapata

Copyright 2016 Bartosz Schiller

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.