如何在安卓上使用iText或其他库创建PDF文件？

Question

如何在安卓上使用iText或其他库创建PDF文件？

有没有安卓版iText的教程？

谢谢

Answer 1

您可以使用iText创建PDF。使用最新版本(5.1.3)，并在构建路径中仅包含itextpdf-5.1.3.jar。您可以使用类似下面的代码来完成pdf的创建。

Document document = new Document();
file = Environment.getExternalStorageDirectory().getPath() + "/Hello.pdf"
PdfWriter.getInstance(document,new FileOutputStream(file));
document.open();
Paragraph p = new Paragraph("Hello PDF");
document.add(p);
document.close();

此外，不要忘记在manifest.xml中使用写入外部存储的权限。

Answer 2

举个例子，这很简单

在我的存储库中Here代码(更新链接)

gradle.build

compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.madgag:scpkix-jdk15on:1.47.0.1'
compile 'com.itextpdf:itextpdf:5.0.6'

activity_main.xml

 <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.hackro.itext.MainActivity">
    
    <Button
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btnwrite"
        android:text="PDF"
        android:onClick="GeneratePDF"
        />
    </RelativeLayout>

MainActivity.java

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import com.itextpdf.text.pdf.BaseFont;
import java.io.File;

public class MainActivity extends Activity {

    private static final String LOG_TAG = "GeneratePDF";


    private BaseFont bfBold;

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



    }


    public void GeneratePDF(View view)
    {
        // TODO Auto-generated method stub
        String filename = "david";
        String filecontent = "Contenido";
        Metodos fop = new Metodos();
        if (fop.write(filename, filecontent)) {
            Toast.makeText(getApplicationContext(),
                    filename + ".pdf created", Toast.LENGTH_SHORT)
                    .show();
        } else {
            Toast.makeText(getApplicationContext(), "I/O error",
                    Toast.LENGTH_SHORT).show();
        }
    }

  }

Metodos.java

 import android.util.Log;
    
    import com.itextpdf.text.BaseColor;
    import com.itextpdf.text.Document;
    import com.itextpdf.text.DocumentException;
    import com.itextpdf.text.Element;
    import com.itextpdf.text.Font;
    import com.itextpdf.text.Paragraph;
    import com.itextpdf.text.Phrase;
    import com.itextpdf.text.pdf.PdfPCell;
    import com.itextpdf.text.pdf.PdfPTable;
    import com.itextpdf.text.pdf.PdfWriter;
    
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    /**
     * Created by hackro on 24/11/15.
     */
    public class Metodos {
    
    
        public Boolean write(String fname, String fcontent) {
            try {
                String fpath = "/sdcard/" + fname + ".pdf";
                File file = new File(fpath);
    
                if (!file.exists()) {
                    file.createNewFile();
                }
    
                Font bfBold12 = new Font(Font.FontFamily.TIMES_ROMAN, 12, Font.BOLD, new BaseColor(0, 0, 0));
                Font bf12 = new Font(Font.FontFamily.TIMES_ROMAN, 12);
    
    
                Document document = new Document();
    
                PdfWriter.getInstance(document,
                        new FileOutputStream(file.getAbsoluteFile()));
                document.open();
    
                document.add(new Paragraph("Sigueme en Twitter!"));
    
                document.add(new Paragraph("@DavidHackro"));
                document.close();
    
                return true;
            } catch (IOException e) {
                e.printStackTrace();
                return false;
            } catch (DocumentException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                return false;
            }
        }}

结果

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好运

Answer 3

这是我的示例代码，用于使用Itext库创建包含文本和图像内容的pdf文件，并将该文件存储在外部存储位置。唯一需要做的就是下载itext库并将其添加到项目中。

private void createPdf() {
                // TODO Auto-generated method stub
                com.itextpdf.text.Document document = new com.itextpdf.text.Document();

                 try {
                        String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/vindroid";

                        File dir = new File(path);
                            if(!dir.exists())
                                dir.mkdirs();

                        Log.d("PDFCreator", "PDF Path: " + path);


                        File file = new File(dir, "sample.pdf");
                        FileOutputStream fOut = new FileOutputStream(file);

                        PdfWriter.getInstance(document, fOut);

                        //open the document
                        document.open();


                        Paragraph p1 = new Paragraph("Sample PDF CREATION USING IText");
                        Font paraFont= new Font(Font.FontFamily.COURIER);
                        p1.setAlignment(Paragraph.ALIGN_CENTER);
                        p1.setFont(paraFont);

                         //add paragraph to document    
                         document.add(p1);

                         Paragraph p2 = new Paragraph("This is an example of a simple paragraph");
                         Font paraFont2= new Font(Font.FontFamily.COURIER,14.0f,0, CMYKColor.GREEN);
                         p2.setAlignment(Paragraph.ALIGN_CENTER);
                         p2.setFont(paraFont2);

                         document.add(p2);

                         ByteArrayOutputStream stream = new ByteArrayOutputStream();
                         Bitmap bitmap = BitmapFactory.decodeResource(getBaseContext().getResources(), R.drawable.ic_launcher);
                         bitmap.compress(Bitmap.CompressFormat.JPEG, 100 , stream);
                         Image myImg = Image.getInstance(stream.toByteArray());
                         myImg.setAlignment(Image.MIDDLE);

                         //add image to document
                         document.add(myImg);




                 } catch (DocumentException de) {
                         Log.e("PDFCreator", "DocumentException:" + de);
                 } catch (IOException e) {
                         Log.e("PDFCreator", "ioException:" + e);
                 } 
                 finally
                 {
                         document.close();
                 }

            }