android原生打印PDF，HTML；HTML转换为PDF

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我是靠谱客的博主俊秀柚子，最近开发中收集的这篇文章主要介绍android原生打印PDF，HTML；HTML转换为PDF，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

该工具类方法实现了调用原生打印机打印PDF文件，打印HTML格式文件；打印HTML文件如果较大的话，生成预览比较慢，所以还有个方法将HTML文件转换为PDF，然后打印，此方法与原生PDF打印生成预览时间差不多，但是可能会造成内存溢出，但不影响使用。

import android.app.Activity;
import android.content.Context;
import android.print.PrintAttributes;
import android.print.PrintDocumentAdapter;
import android.print.PrintManager;
import android.util.Base64;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.FontFactory;
import com.itextpdf.text.FontProvider;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.XMLWorkerHelper;
import org.jsoup.Jsoup;
import org.jsoup.safety.Whitelist;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;

public class PrintUtil {
    /**
     * 打印pdf文件方法
     *
     * @param activity
     * @throws IOException
     */
    public static void printpdf(Activity activity) throws IOException {
        PrintManager printManager = (PrintManager) activity.getSystemService(Context.PRINT_SERVICE);
        MyPrintPdfAdapter myPrintAdapter = new MyPrintPdfAdapter(readStream(1));
        PrintAttributes.Builder builder = new PrintAttributes.Builder();
        builder.setColorMode(PrintAttributes.COLOR_MODE_COLOR);
        printManager.print("test", myPrintAdapter, builder.build());
    }

    /**
     * 打印html文件方法
     *
     * @param activity
     * @throws IOException
     */
    public static void printWebView(Activity activity) throws IOException {
        WebView webView = new WebView(activity);
        webView.setWebViewClient(new WebViewClient() {
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return false;
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                createWebPrintJob(view, activity);
            }
        });
        String htmlDocument = readStream(2);
        webView.loadDataWithBaseURL(null, htmlDocument, "text/HTML", "UTF-8", null);
    }

    private static void createWebPrintJob(WebView webView, Activity activity) {
        PrintManager printManager = (PrintManager) activity.getSystemService(Context.PRINT_SERVICE);
        PrintDocumentAdapter printAdapter = webView.createPrintDocumentAdapter();
        String jobName = "webDocument";
        printManager.print(jobName, printAdapter, new PrintAttributes.Builder().build());
    }

    /**
     * 读取本地文件
     * @param type
     * @return
     * @throws IOException
     */
    public static String readStream(int type) throws IOException {
        String filePath = "/sdcard/1.html";
        if (type == 1) {
            filePath = "/sdcard/doc.pdf";
        }
        FileInputStream fileInputStream = new FileInputStream(filePath);
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        byte[] bytes = new byte[1024];
        int len = 0;
        while (-1 != (len = fileInputStream.read(bytes))) {
            byteArrayOutputStream.write(bytes, 0, len);
        }
        byteArrayOutputStream.close();
        fileInputStream.close();
        byte[] resBytes = byteArrayOutputStream.toByteArray();
        if (type == 1) {
            return Base64.encodeToString(resBytes, 1);
        } else {
            return new String(resBytes, "UTF-8");
        }
    }
//===========================================================================================================
    /**
     *将HTML数据转换成PDF文件存在本地
     * 此方法需要引入：itextpdf-5.5.jar，jsoup-1.7.jar，xmlworker-5.3.5-javadoc.jar，xmlworker-5.5.6.jar
     * @param rawHTML
     * @param fileName
     * @param context
     * @return
     */
    public String createPDF(String rawHTML, String fileName, Context context) {
        File file = new File(fileName);
        try {
            Document document = new Document();
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
            document.open();
            //  HTML
            String htmlText = Jsoup.clean(rawHTML, Whitelist.relaxed());
            InputStream inputStream = new ByteArrayInputStream(htmlText.getBytes());
            //  PDF
            XMLWorkerHelper.getInstance().parseXHtml(writer, document,
                    inputStream, null, Charset.defaultCharset(), new MyFont(context));
            document.close();
            return "";
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return "Error|" + e.getMessage();
        } catch (DocumentException e) {
            e.printStackTrace();
            return "Error|" + e.getMessage();
        } catch (IOException e) {
            e.printStackTrace();
            return "Error|" + e.getMessage();
        }
    }

    public class MyFont implements FontProvider {
        private static final String FONT_PATH = "/sdcard/DroidSansFallback.ttf";
        private static final String FONT_ALIAS = "my_font";

        public MyFont(Context context) {
            copyTTFtoSdcard(context);
            FontFactory.register(FONT_PATH, FONT_ALIAS);
        }

        @Override
        public Font getFont(String fontname, String encoding, boolean embedded,
                            float size, int style, BaseColor color) {

            return FontFactory.getFont(FONT_ALIAS, BaseFont.IDENTITY_H,
                    BaseFont.EMBEDDED, size, style, color);
        }

        @Override
        public boolean isRegistered(String name) {
            return name.equals(FONT_ALIAS);
        }
    }

    private void copyTTFtoSdcard(Context context) {
        File file = new File("/sdcard/DroidSansFallback.ttf");
        if (file.exists()) {
            return;
        }
        InputStream open = null;
        FileOutputStream fileOutputStream = null;
        try {
            open = context.getAssets().open("DroidSansFallback.ttf");
            fileOutputStream = new FileOutputStream(file);
            byte[] bytes = new byte[1024];
            int len;
            while ((len = open.read(bytes)) > 0) {
                fileOutputStream.write(bytes, 0, len);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (open != null) {
                    open.close();
                }
                if (fileOutputStream != null) {
                    fileOutputStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

MyPrintPdfAdapter 类

import android.os.Bundle;
import android.os.CancellationSignal;
import android.os.ParcelFileDescriptor;
import android.print.PageRange;
import android.print.PrintAttributes;
import android.print.PrintDocumentAdapter;
import android.print.PrintDocumentInfo;
import android.util.Base64;

import java.io.ByteArrayInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class MyPrintPdfAdapter extends PrintDocumentAdapter {
//    private String mFilePath;

    private String fileBaseString;

//    public MyPrintPdfAdapter(String file) {
//        this.mFilePath = file;
//    }

    public MyPrintPdfAdapter(String fileBase64Str){
        this.fileBaseString = fileBase64Str;
    }

    // 当用户更改打印设置导致打印结果改变时调用，如更改纸张尺寸，纸张方向等；
    @Override
    public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal,
                         LayoutResultCallback callback, Bundle extras) {
        if (cancellationSignal.isCanceled()) {
            callback.onLayoutCancelled();
            return;
        }
        PrintDocumentInfo info = new PrintDocumentInfo.Builder(getJobName())
                .setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)
                .build();
        callback.onLayoutFinished(info, true);
    }

    // 当将要打印的结果写入到文件中时调用，该方法在每次onLayout（）调用后会调用一次或多次；
    @Override
    public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal,
                        WriteResultCallback callback) {
        InputStream input = null;
        OutputStream output = null;

        try {
            byte[] fileByte = Base64.decode(fileBaseString, Base64.DEFAULT);
            input = new ByteArrayInputStream(fileByte);
            output = new FileOutputStream(destination.getFileDescriptor());

            byte[] buf = new byte[1024];
            int bytesRead;

            while ((bytesRead = input.read(buf)) > 0) {
                output.write(buf, 0, bytesRead);
            }

            callback.onWriteFinished(new PageRange[]{PageRange.ALL_PAGES});

        } catch (FileNotFoundException e) {
            // Catch exception
            e.printStackTrace();
        } catch (Exception e) {
            // Catch exception
            e.printStackTrace();
        } finally {
            try {
                input.close();
                output.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * @return
     */
    private String getJobName() {
        try {
//            String[] filePaths = mFilePath.split(File.separator);
//            return filePaths[filePaths.length - 1];
            return "receiptPrint";
        } catch (Exception e) {
            e.printStackTrace();
        }

        return String.valueOf(System.currentTimeMillis());
    }
}

注意：
1.在“将HTML数据转换成PDF文件”方法中，需要用到“DroidSansFallback.ttf”字体，一般此字体在安卓系统中有，在“/system/fonts/”文件夹下，我的机器恰好就没有这个字体，所以我把字体放在项目assets文件夹，然后在使用时拷贝到sd卡中，若也没有此字体可以在此下载：https://download.csdn.net/download/qq_28708411/12594005 若没积分，可以在百度网盘中下载：链接：https://pan.baidu.com/s/1f9duJ4NabjaiSUvRDGOCoQ
提取码：h9rk
2.HTML文件中用到中文的，此“font-family:”属性要改为“my_font”，例如：在这里插入图片描述是根据此设置的：3.使用到的jar包下载地址： https://download.csdn.net/download/qq_28708411/12593995 百度云地址：链接：https://pan.baidu.com/s/1wSnQyZaFp7nCDb0vUZNslg
提取码：roid
4.打印服务APK：链接：https://pan.baidu.com/s/1iYnkERaGQWUpuWbS0J6sdQ
提取码：ht1e