private void onPrintPdf() {    PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);    PrintAttributes.Builder builder = new PrintAttributes.Builder();    builder.setColorMode(PrintAttributes.COLOR_MODE_COLOR);    printManager.print("test pdf print", new MyPrintAdapter(this,filePath), builder.build());  }

package com.android.guocheng.printdemo;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.pdf.PdfDocument;import android.graphics.pdf.PdfDocument.PageInfo;import android.graphics.pdf.PdfRenderer;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.print.pdf.PrintedPdfDocument;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.List;/** * Created by guocheng on 2017/6/13. */public class MyPrintAdapter extends PrintDocumentAdapter {  private Context context;  private int pageHeight;  private int pageWidth;  private PdfDocument mPdfDocument;  private int totalpages = 1;  private String pdfPath;  private List<Bitmap> mlist;  public MyPrintAdapter(Context context,String pdfPath) {    this.context = context;    this.pdfPath = pdfPath;  }  @Override  public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal,             LayoutResultCallback callback,             Bundle metadata) {    mPdfDocument = new PrintedPdfDocument(context, newAttributes); //創(chuàng)建可打印PDF文檔對(duì)象    pageHeight = newAttributes.getMediaSize().ISO_A4.getHeightMils() * 72 / 1000; //設(shè)置尺寸    pageWidth = newAttributes.getMediaSize().ISO_A4.getWidthMils() * 72 / 1000;    if (cancellationSignal.isCanceled()) {      callback.onLayoutCancelled();      return;    }    ParcelFileDescriptor mFileDescriptor = null;    PdfRenderer pdfRender = null;    PdfRenderer.Page page = null;    try {      mFileDescriptor = ParcelFileDescriptor.open(new File(pdfPath), ParcelFileDescriptor.MODE_READ_ONLY);      if (mFileDescriptor != null)        pdfRender = new PdfRenderer(mFileDescriptor);      mlist = new ArrayList<>();      if (pdfRender.getPageCount() > 0) {        totalpages = pdfRender.getPageCount();        for (int i = 0; i < pdfRender.getPageCount(); i++) {          if(null != page)            page.close();          page = pdfRender.openPage(i);          Bitmap bmp = Bitmap.createBitmap(page.getWidth()*2,page.getHeight()*2, Bitmap.Config.ARGB_8888);          page.render(bmp, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);          mlist.add(bmp);        }      }      if(null != page)        page.close();      if(null != mFileDescriptor)        mFileDescriptor.close();      if (null != pdfRender)        pdfRender.close();    } catch (FileNotFoundException e) {      e.printStackTrace();    } catch (IOException e) {      e.printStackTrace();    }    if (totalpages > 0) {      PrintDocumentInfo.Builder builder = new PrintDocumentInfo          .Builder("快速入門.pdf")          .setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)          .setPageCount(totalpages); //構(gòu)建文檔配置信息      PrintDocumentInfo info = builder.build();      callback.onLayoutFinished(info, true);    } else {      callback.onLayoutFailed("Page count is zero.");    }  }  @Override  public void onWrite(final PageRange[] pageRanges, final ParcelFileDescriptor destination, final CancellationSignal cancellationSignal,            final WriteResultCallback callback) {    for (int i = 0; i < totalpages; i++) {      if (pageInRange(pageRanges, i)) //保證頁(yè)碼正確      {        PageInfo newPage = new PageInfo.Builder(pageWidth,            pageHeight, i).create();        PdfDocument.Page page =            mPdfDocument.startPage(newPage); //創(chuàng)建新頁(yè)面        if (cancellationSignal.isCanceled()) { //取消信號(hào)          callback.onWriteCancelled();          mPdfDocument.close();          mPdfDocument = null;          return;        }        drawPage(page, i); //將內(nèi)容繪制到頁(yè)面Canvas上        mPdfDocument.finishPage(page);      }    }    try {      mPdfDocument.writeTo(new FileOutputStream(          destination.getFileDescriptor()));    } catch (IOException e) {      callback.onWriteFailed(e.toString());      return;    } finally {      mPdfDocument.close();      mPdfDocument = null;    }    callback.onWriteFinished(pageRanges);  }  private boolean pageInRange(PageRange[] pageRanges, int page) {    for (int i = 0; i < pageRanges.length; i++) {      if ((page >= pageRanges[i].getStart()) &&          (page <= pageRanges[i].getEnd()))        return true;    }    return false;  }  //頁(yè)面繪制（渲染）  private void drawPage(PdfDocument.Page page,int pagenumber) {    Canvas canvas = page.getCanvas();    if(mlist != null){      Paint paint = new Paint();      Bitmap bitmap = mlist.get(pagenumber);      int bitmapWidth = bitmap.getWidth();      int bitmapHeight = bitmap.getHeight();      // 計(jì)算縮放比例      float scale = (float)pageWidth/(float)bitmapWidth;      // 取得想要縮放的matrix參數(shù)      Matrix matrix = new Matrix();      matrix.postScale(scale, scale);      canvas.drawBitmap(bitmap,matrix,paint);    }  }}