Easy PDF Library for Android.
I solved the memory excess error when attaching images and fonts by replacing it with a temporary file.
All stream data is stored in a temporary file and read as a PDF binary. Both DCT_DECODE and FLATE_DECODE have been made in temporary files, drastically reducing memory usage.
Supports transparent background images. By representing the alpha value as a soft mask image, a black line can be drawn at the edges for small images. If you also attempt to draw the Xml Vector Drawable with PDFimage, change it to a bitmap with an alpha value of at least 256x256 px.
To address the issue of being unable to draw multiple PDFs simultaneously due to Zoomable Single-Tone objects, refer to the size of the current PDF through the PDFPageLayout object.
The existing version draws the components shown on each page on a bitmap. The disadvantage of this method is that the app could bounce due to out of memory from the moment the canvas size exceeded five pages.
Starting with version 1.1.0, all components are converted to PDF binary format. That is, the capacity of the output PDF file is reduced by optimizing text and images in binary format.
Embedding fonts are only supported for the .ttf extension.
dependencies {
implementation 'io.github.hangyeolee:androidpdfwriter:1.1.3'
}<dependency>
<groupId>io.github.hangyeolee</groupId>
<artifactId>androidpdfwriter</artifactId>
<version>1.1.3</version>
</dependency>// The parameters of the PDF Builder are horizontal and vertical lengths based on 72 dpi.
// A4 paper width:595.3px height:841.9px
// set PDF page padding, vertical and horizontal
PDFBuilder builder = new PDFBuilder(PageLayoutFactory.createLayout(Paper.A4, 30, 30));PDFLinearLayout root = PDFLinearLayout.build(Orientation.Vertical)
.setBackgroundColor(Color.BLUE)
.addChild(PDFImage.fromResource(context, resourceId)
.setCompress(true)
.setHeight(200f)
.setFit(Fit.CONTAIN))
.addChild(PDFH1.build("Title", PDFFont.HELVETICA_BOLD)
.setBackgroundColor(Color.RED)
.setTextAlign(TextAlign.Center))
.addChild(PDFGridLayout.horizontal(3)
.setMargin(10, 10, 10, 10)
.setBackgroundColor(Color.WHITE)
.setBorder(border -> border
.setLeft(4, Color.BLACK)
.setTop(4, Color.RED)
.setRight(4, Color.GREEN)
.setBottom(4, Color.MAGENTA))
.addCell(PDFH3.build("Number").wrapGridCell())
.addCell(PDFH3.build("Name")
.setFontFromAsset(context, "Pretendard-Bold.ttf")
.setBackgroundColor(Color.YELLOW)
.setTextAlign(TextAlign.Center)
.wrapGridCell())
.addCell(PDFH3.build("Content")
.setBackgroundColor(Color.BLACK)
.setTextColor(Color.WHITE)
.setTextAlign(TextAlign.Center)
.wrapGridCell())
.addCell(1, 0, PDFH3.build("001")
.setBackgroundColor(Color.GREEN)
.wrapGridCell()
.setBackgroundColor(Color.BLACK))
.addCell(2, 1, PDFH3.build("Hong Gil-Dong")
.setBackgroundColor(Color.YELLOW)
.setTextAlign(TextAlign.Center)
.wrapGridCell()
.setBackgroundColor(Color.BLACK))
.addCell(3, 2, PDFH3.build("Some content had been existed.")
.setBackgroundColor(Color.BLACK)
.setTextColor(Color.WHITE)
.setTextAlign(TextAlign.Center)
.wrapGridCell()
.setBackgroundColor(Color.GREEN))
.addCell(4, 1, PDFImage.fromResource(context, resourceId)
.setCompress(true)
.setHeight(150)
.setFit(Fit.CONTAIN)
.wrapGridCell())
.addCell(4, 2, PDFH3.build(
"It's a very, very long content, and the vertical height of the table layout is the same. It's a very, very long content, and the vertical height of the table layout is the same.")
.setTextColor(Color.BLACK)
.setTextAlign(TextAlign.Center)
.wrapGridCell()))
.addChild(PDFGridLayout.horizontal(2)
.setMargin(10, 10, 10, 10)
.setBackgroundColor(Color.WHITE)
.setBorder(border -> border
.setLeft(4, Color.BLACK)
.setTop(4, Color.RED)
.setRight(4, Color.GREEN)
.setBottom(4, Color.MAGENTA))
.addCell(0, 0, PDFH3.build(
"It's a content without Span.")
.setBackgroundColor(Color.BLACK)
.setTextColor(Color.WHITE)
.setTextAlign(TextAlign.Center)
.wrapGridCell())
.addCell(1, 0, PDFH3.build(
"It's a content without Span.")
.setBackgroundColor(Color.WHITE)
.setTextColor(Color.BLACK)
.setTextAlign(TextAlign.Center)
.wrapGridCell())
.addCell(0, 1, PDFH3.build(
"It's a very long content. According to this content, the vertical height of Table layout is the same. It also has Span applied, and if you do well, you can also go over the page.")
.setBackgroundColor(Color.BLACK)
.setTextColor(Color.WHITE)
.setTextAlign(TextAlign.Center)
.wrapGridCell()
.setRowSpan(2))
.addCell(2, 0, PDFH3.build(
"PDFH3 It's a very long content. According to this content, the vertical height of Table layout is the same. It also has Span applied, and if you do well, you can also go over the page.")
.setBackgroundColor(Color.BLACK)
.setTextColor(Color.WHITE)
.setTextAlign(TextAlign.Center)
.wrapGridCell()
.setRowSpan(2))
.addCell(2, 1, PDFH3.build(
"PDFH3 It's a content without Span.")
.setBackgroundColor(Color.GRAY)
.setTextColor(Color.WHITE)
.setTextAlign(TextAlign.Center)
.wrapGridCell())
.addCell(3, 1, PDFH3.build(
"PDFH3 It's a content without Span.")
.setBackgroundColor(Color.RED)
.setTextColor(Color.WHITE)
.setTextAlign(TextAlign.Center)
.wrapGridCell()))
;// Draws the corresponding layout.
builder.draw(root);
// Saved in the Download folder.
builder.save(context, StandardDirectory.DIRECTORY_DOWNLOADS, "result.pdf");
Sets the quality value for the image within the PDF. Can change compress quality. Default quality is 85.
builder.setQuality(60);Copyright 2023 HanGyeol Choi
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
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.