java - 在 Android 中创建 PDF

Question

我引用了这篇文章PDF creation ，我想在 PDF 中打印名字和姓氏。引用文章后，我更改了代码并在下面提供了我的代码。

我主要遇到这些系统错误。

1. java.lang.RuntimeException:未找到 the.document.is.not.open
的消息
2. 在 android 中的 com.itextpdf.text.pdf.pdfwriter.getdirectcontent(pdfwriter.java:742)3.在com.example.pdf.MainActivity.onClick(MainActivity.java:73)

这是我更改原始代码后的代码。

        package com.example.pdf;

        import java.io.ByteArrayOutputStream;
        import java.io.File;
        import java.io.FileOutputStream;
        import java.io.IOException;
        import java.io.InputStream;

        import android.graphics.Bitmap;
        import android.graphics.BitmapFactory;
        import android.os.Bundle;
        import android.os.Environment;
        import android.support.v7.app.ActionBarActivity;
        import android.util.Log;
        import android.view.View;
        import android.view.View.OnClickListener;
        import android.widget.Button;
        import android.widget.EditText;

        import com.itextpdf.text.Document;
        import com.itextpdf.text.DocumentException;
        import com.itextpdf.text.PageSize;
        import com.itextpdf.text.Paragraph;
        import com.itextpdf.text.pdf.BaseFont;
        import com.itextpdf.text.pdf.PdfContentByte;
        import com.itextpdf.text.pdf.PdfWriter;

        public class MainActivity extends ActionBarActivity implements OnClickListener {

            EditText firstName_edt;
            EditText lastName_edt;
            Button preView_btn;
            private BaseFont bfBold;
            private String filepath = "MyInvoices";
            private String filename = "Sample.pdf";
            private File pdfFile;
            private static final String LOG_TAG = "GeneratePDF";

            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);

                /*InputStream license = this.getResources().openRawResource(R.raw.itextkey);
                  LicenseKey.loadLicenseFile(license);*/

                firstName_edt = (EditText) (findViewById(R.id.activity_main_firstname_edt));

                lastName_edt = (EditText) (findViewById(R.id.activity_main_lastname_edt));

                preView_btn = (Button) (findViewById(R.id.activity_main_preview_btn));

                preView_btn.setOnClickListener(this);
                if (!isExternalStorageAvailable() || isExternalStorageReadOnly()) {
                    Log.v(LOG_TAG,
                            "External Storage not available or you don't have permission to write");
                } else {
                    // path for the PDF file in the external storage
                    pdfFile = new File(getExternalFilesDir(filepath), filename);
                }

            }

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                switch (v.getId()) {
                case R.id.activity_main_preview_btn:

                    String firstaName_str = firstName_edt.getText().toString();
                    String lastName_str = lastName_edt.getText().toString();
                    createPdf(firstaName_str, lastName_str);

                    break;
                default:
                    break;
                }
            }

            private void createPdf(String firstNAME, String lastNAME) {
                // TODO Auto-generated method stub

                // create file
                try {

                    // create document
                    Document document = new Document(PageSize.A4.rotate(), 50, 50, 50,
                            50);

                    PdfWriter docWriter = PdfWriter.getInstance(document,
                            new FileOutputStream(pdfFile));

                    PdfContentByte cb = docWriter.getDirectContent();

                    document.open();

                    // initialize fonts
                    initializeFonts();

                    // set logo image
                    InputStream input = getAssets().open("ic_launcher.png");

                    Bitmap bitmap = BitmapFactory.decodeStream(input);

                    ByteArrayOutputStream stream = new ByteArrayOutputStream();

                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);

                    com.itextpdf.text.Image logo = com.itextpdf.text.Image
                            .getInstance(stream.toByteArray());
                    logo.setAbsolutePosition(25, 700);
                    logo.scalePercent(25);
                    document.add(logo);

                    // create paragraph
                    document.add(new Paragraph("Personal Details"));
                    document.add(new Paragraph("Name:Sachin Singh"));
                    document.add(new Paragraph("Address: Kolkata"));
                    document.add(new Paragraph("email: ash@gmail.com"));
                    document.add(new Paragraph("Gender:F"));

                    // set firstname and lastname from edittext
                    createHeadings(cb, 450, 135, firstNAME, lastNAME);

                } catch (Exception e) {
                    // TODO: handle exception
                    e.printStackTrace();
                }

            }

            private static boolean isExternalStorageReadOnly() {
                String extStorageState = Environment.getExternalStorageState();
                if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(extStorageState)) {
                    return true;
                }
                return false;
            }

            private static boolean isExternalStorageAvailable() {
                String extStorageState = Environment.getExternalStorageState();
                if (Environment.MEDIA_MOUNTED.equals(extStorageState)) {
                    return true;
                }
                return false;
            }

            private void initializeFonts() {
                // TODO Auto-generated method stub
                try {
                    bfBold = BaseFont.createFont(BaseFont.HELVETICA_BOLD,
                            BaseFont.CP1252, BaseFont.NOT_EMBEDDED);

                } catch (DocumentException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            // method for setting firstname and last name
            private void createHeadings(PdfContentByte cb, float x, float y,
                    String firstNAME, String lastNAME) {
                // TODO Auto-generated method stub
                cb.beginText();
                cb.setFontAndSize(bfBold, 8);
                cb.setTextMatrix(x, y);
                cb.showText(firstNAME.trim());
                cb.showText(lastNAME.trim());
                cb.endText();
            }
        }

Xml文件

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <EditText
            android:id="@+id/activity_main_firstname_edt"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="enter first name"
            android:ems="10" >

            <requestFocus />
        </EditText>

        <EditText
            android:id="@+id/activity_main_lastname_edt"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
             android:hint="enter last name"
            android:ems="10" />

        <Button
            android:id="@+id/activity_main_preview_btn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Preview" />

    </LinearLayout>

 logcat data

02-18 00:38:10.789: I/eFrame(32423): pkgname_before:com.example.pdf  class:com.android.launcher2.Launcher
02-18 00:39:45.171: I/eFrame(32423): pkgname_before:com.sec.android.app.launcher  class:com.example.pdf.MainActivity
02-18 00:39:53.159: W/System.err(32410): com.itextpdf.text.DocumentException: No message found for 1.not.found.as.resource
02-18 00:39:53.159: W/System.err(32410):    at com.itextpdf.text.pdf.Type1Font.<init>(Type1Font.java:192)
02-18 00:39:53.159: W/System.err(32410):    at com.itextpdf.text.pdf.BaseFont.createFont(BaseFont.java:699)
02-18 00:39:53.159: W/System.err(32410):    at com.itextpdf.text.pdf.BaseFont.createFont(BaseFont.java:622)
02-18 00:39:53.159: W/System.err(32410):    at com.itextpdf.text.pdf.BaseFont.createFont(BaseFont.java:457)
02-18 00:39:53.159: W/System.err(32410):    at com.example.pdf.MainActivity.initializeFonts(MainActivity.java:162)
02-18 00:39:53.159: W/System.err(32410):    at com.example.pdf.MainActivity.createPdf(MainActivity.java:101)
02-18 00:39:53.159: W/System.err(32410):    at com.example.pdf.MainActivity.onClick(MainActivity.java:74)
02-18 00:39:53.169: W/System.err(32410):    at com.itextpdf.text.pdf.PdfWriter.addSimple(PdfWriter.java:2280)
02-18 00:39:53.169: W/System.err(32410):    at com.itextpdf.text.pdf.PdfContentByte.setFontAndSize(PdfContentByte.java:1704)
02-18 00:39:53.169: W/System.err(32410):    at com.example.pdf.MainActivity.createHeadings(MainActivity.java:137)
02-18 00:39:53.169: W/System.err(32410):    at com.example.pdf.MainActivity.createPdf(MainActivity.java:119)
02-18 00:39:53.169: W/System.err(32410):    at com.example.pdf.MainActivity.onClick(MainActivity.java:74)

Answer 1

在调用方法“docWriter.getDirectContent()”之前调用方法“document.open()”:

document.open();

PdfContentByte cb = docWriter.getDirectContent();

关于你的字体异常，我不使用BaseFont。请尝试这个:

// colors
    private static final BaseColor colorFont = new BaseColor(51, 51, 51);
    private static final BaseColor colorBlue = new BaseColor(32, 119, 215);

        // fonts
        private static final Font fontDefault = new Font(FontFamily.HELVETICA, 10,
                Font.NORMAL, colorFont);
        private static final Font fontBold = new Font(FontFamily.HELVETICA, 10,
                Font.BOLD, colorFont);
        private static final Font fontTitle = new Font(FontFamily.HELVETICA, 10,
                Font.BOLD, colorBlue);

    new Paragraph(new Chunk("Personal Details",
                        fontDefault))