Android iText 生成pdf

gradle

compile('com.itextpdf:itextg:5.5.10') {
        exclude group: 'com.itextpdf.text.pdf', module: 'fonts'
    }
compile 'org.bouncycastle:bcprov-jdk15on:1.49' //加密
compile 'org.bouncycastle:bcpkix-jdk15on:1.49' //加密

生成pdf

val base = BaseFont.createFont("assets/STSong.TTF",BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED)//中文字体
val pdf = Document(PageSize.A4, 42f, 42f, 50f, 42f)
val writer = PdfWriter.getInstance(pdf, FileOutputStream(file))
pdf.open()
//居中标题
val font = Font(base, 14f)
font.style = Font.BOLD
val title = Paragraph("pdf标题",font)
title.alignment = Element.ALIGN_CENTER
pdf.add(title)
//创建表格
val table = PdfPTable(2) // columns.  2 列
table.widthPercentage = 96f // Width 100%
table.spacingBefore = 20f // Space before table
table.spacingAfter = 10f // Space after table
table.setWidths(intArrayOf(1,2)) //宽度占比
// 合并两个单元格 居中显示标题
val name = PdfPCell(Paragraph("单元格标题", font ))
name.backgroundColor =BaseColor.LIGHT_GRAY
name.colspan = 2 //占两列
name.setPadding(6f)
name.horizontalAlignment = Element.ALIGN_CENTER
table.addCell(name)
// 添加一行数据
val cell1= PdfPCell(Paragraph("单元格1", font ))
val cell2= PdfPCell(Paragraph("单元格2", font ))
table.addCell(cell1)
table.addCell(cell2)
// 添加图片
var img = Image.getInstance(imgurl)
img.scaleToFit(300f,400f) //缩放
pdf.add(img)
//添加空行
pdf.add(Chunk.NEWLINE)
pdf.close()
writer.close()

加密pdf

val OWNERPASSWORD ="123456" 
var reader = PdfReader(sourceFile)
var stamp = PdfStamper(reader, FileOutputStream(encryptedFile))
stamp.setEncryption(null, OWNERPASSWORD.toByteArray(), PdfWriter.ALLOW_PRINTING, false)
stamp.setFormFlattening(true)
stamp.close()
reader.close()

OWNERPASSWORD 是拥有者自定义密码。
PdfWriter.ALLOW_PRINTING 表示默认开放的权限级别，此处表示默认不输入密码可以进行查看打印，但是修改文档需要输入密码。
PdfWriter.ALLOW_MODIFY_CONTENTS 表示不输入密码就可以修改文档

中文字体支持

assets目录添加 STSong.TTF字体文件

val base = BaseFont.createFont("assets/STSong.TTF",BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED) //创建字体

每一页添加内容

每页右下角添加logo

// 每页右下角添加logo
val pdf = Document(PageSize.A4, 42f, 42f, 50f, 42f)
val file = File(distFile)
val writer = PdfWriter.getInstance(pdf, FileOutputStream(file))
writer.pageEvent = PageFooter(logo)

class PageFooter(logo:Image):PdfPageEventHelper(){
        var logo:Image = logo
        override fun onEndPage(writer: PdfWriter, document: Document) {
            super.onEndPage(writer, document)
            logo.alignment = Element.ALIGN_RIGHT
            logo.setAbsolutePosition(document.right()-10,document.bottom()-22)
            document?.add(logo)
        }
    }