Library for displaying PDF documents on Android, with animations, gestures, zoom and double tap support.
It uses the build in PdfRenderer for decoding PDF files. Works on API 21 (Android 5.0) and higher.
Licensed under Apache License 2.0.
Based on barteksc/AndroidPdfViewer but without pdfium to avoid increasing the size of your apk/aab. For better performance and a richer feature set, consider using it instead
Note: The library is not yet available in any public repository. Until then, you have to build it on your own.
Add to build.gradle:
implementation 'se.aleborn:android-pdf-viewer:1.0.0-beta.1'
<se.aleborn.pdfviewer.PDFView
android:id="@+id/pdfView"
android:layout_width="match_parent"
android:layout_height="match_parent"/>All available options with default values:
pdfView.fromUri(Uri)
or
pdfView.fromFile(File)
or
pdfView.fromBytes(byte[])
or
pdfView.fromStream(InputStream) // stream is written to bytearray - native code cannot use Java Streams
or
pdfView.fromSource(DocumentSource)
or
pdfView.fromAsset(String)
.pages(0, 2, 1, 3, 3, 3) // all pages are displayed by default
.enableSwipe(true) // allows to block changing pages using swipe
.swipeHorizontal(false)
.enableDoubletap(true)
.defaultPage(0)
// allows to draw something on the current page, usually visible in the middle of the screen
.onDraw(onDrawListener)
// allows to draw something on all pages, separately for every page. Called only for visible pages
.onDrawAll(onDrawListener)
.onLoad(onLoadCompleteListener) // called after document is loaded and starts to be rendered
.onPageChange(onPageChangeListener)
.onPageScroll(onPageScrollListener)
.onError(onErrorListener)
.onPageError(onPageErrorListener)
.onRender(onRenderListener) // called after document is rendered for the first time
// called on single tap, return true if handled, false to toggle scroll handle visibility
.onTap(onTapListener)
.onLongPress(onLongPressListener)
.scrollHandle(null)
.enableAntialiasing(true) // improve rendering a little bit on low-res screens
// spacing between pages in dp. To define spacing color, set view background
.spacing(0)
.autoSpacing(false) // add dynamic spacing to fit each page on its own on the screen
.pageFitPolicy(FitPolicy.WIDTH) // mode to fit pages in the view
.fitEachPage(false) // fit each page to the view, else smaller pages are scaled relative to largest page.
.pageSnap(false) // snap pages to screen boundaries
.pageFling(false) // make a fling change only a single page like ViewPager
.nightMode(false) // toggle night mode
.load();pagesis optional, it allows you to filter and order the pages of the PDF as you need
Scroll handle is replacement for ScrollBar from 1.x branch.
From version 2.1.0 putting PDFView in RelativeLayout to use ScrollHandle is not required, you can use any layout.
To use scroll handle just register it using method Configurator#scrollHandle().
This method accepts implementations of ScrollHandle interface.
There is default implementation shipped with AndroidPdfViewer, and you can use it with
.scrollHandle(new DefaultScrollHandle(this)).
DefaultScrollHandle is placed on the right (when scrolling vertically) or on the bottom (when scrolling horizontally).
By using constructor with second argument (new DefaultScrollHandle(this, true)), handle can be placed left or top.
You can also create custom scroll handles, just implement ScrollHandle interface. All methods are documented as Javadoc comments on interface source.
Document sources, are providers for PDF documents. Every provider implements DocumentSource interface. Predefined providers are available in se.aleborn.pdfviewer.source package and can be used as samples for creating custom ones.
Predefined providers can be used with shorthand methods:
pdfView.fromUri(Uri)
pdfView.fromFile(File)
pdfView.fromBytes(byte[])
pdfView.fromStream(InputStream)
pdfView.fromAsset(String)
Custom providers may be used with pdfView.fromSource(DocumentSource) method.
Library supports fitting pages into the screen in 3 modes:
- WIDTH - width of widest page is equal to screen width
- HEIGHT - height of highest page is equal to screen height
- BOTH - based on widest and highest pages, every page is scaled to be fully visible on screen
Apart from selected policy, every page is scaled to have size relative to other pages.
Fit policy can be set using Configurator#pageFitPolicy(FitPolicy). Default policy is WIDTH.
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);Downloading files is long running process which must be aware of Activity lifecycle, must support some configuration, data cleanup and caching, so creating such module will probably end up as new library.
You have to store current page number and then set it with pdfView.defaultPage(page), refer to sample app
Use FitPolicy.WIDTH policy or add following snippet when you want to fit desired page in document with different page sizes:
Configurator.onRender(new OnRenderListener() {
@Override
public void onInitiallyRendered(int pages, float pageWidth, float pageHeight) {
pdfView.fitToWidth(pageIndex);
}
});You can use a combination of the following settings to get scroll and fling behaviour similar to a ViewPager:
.swipeHorizontal(true)
.pageSnap(true)
.autoSpacing(true)
.pageFling(true)Based on barteksc/AndroidPdfViewer
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.