Android中生成PDF

 



iText 是java和C#中的一个处理PDF的开源类库，国外的大牛已经把它移植到Android上了，但是直接拿来用还是需要花费一点功夫，下面就用一个简单的demo来测试一下。

iText项目地址：https://code.google.com/p/droidtext/

首先用过svn把代码check下来，终端运行

svn checkout http://droidtext.googlecode.com/svn/trunk/ droidtext-read-only

得到三个文件夹，droidText是一个android的库工程，droidTextTest是测试工程。

在eclipse中导入droidText项目。这是个library project，后面创建的项目需要引用到。

然后创建一个Android工程-iTextTest

在工程中引用droidText：

Project->properties->Android->LIbrary:ADD

链接好之后就像上图。

主界面就一个Button，按下之后就开始生产PDF。

[java] view plaincopyprint?

1. package com.example.itexttest;  
2.   
3. import java.io.ByteArrayOutputStream;  
4. import java.io.File;  
5. import java.io.PrintStream;  
6. import java.lang.reflect.Method;  
7.   
8. import android.os.Bundle;  
9. import android.os.Environment;  
10. import android.app.Activity;  
11. import android.view.Menu;  
12. import android.view.View;  
13. import android.widget.Button;  
14. import android.widget.Toast;  
15.   
16. public class ITextActivity extends Activity {  
17.     private Button mButton;  
18.   
19.     @Override  
20.     protected void onCreate(Bundle savedInstanceState) {  
21.         super.onCreate(savedInstanceState);  
22.         setContentView(R.layout.activity_itext);  
23.         mButton = (Button)findViewById(R.id.button1);  
24.         mButton.setOnClickListener(new OnClickListenerImpl());  
25.     }  
26.   
27.     private class OnClickListenerImpl implements View.OnClickListener  
28.     {  
29.   
30.         @Override  
31.         public void onClick(View arg0) {  
32.             // TODO Auto-generated method stub  
33.             //Toast.makeText(getApplicationContext(), "Run", Toast.LENGTH_SHORT).show();  
34.             // Create droidtext directory for storing results  
35.             File file = new File(  
36.                     android.os.Environment.getExternalStorageDirectory()  
37.                     + File.separator + "iTextTest");  
38.             if (!file.exists()) {  
39.                 file.mkdir();  
40.             }  
41.             System.out.println("Click!");  
42.   
43.             Thread t = new Thread() {  
44.   
45.                 public void run() {  
46.                     int success = 0;  
47.                     int count = 1;  
48.                     String className = "com.example.itexttest.HelloWprld";  
49.   
50.                     String result = null;  
51.                     try {  
52.                         // Set output streams to bytearray streams so we can  
53.                         // display the output of examples  
54.                         ByteArrayOutputStream bos = new ByteArrayOutputStream();  
55.                         PrintStream errorStream = new PrintStream(bos, true);  
56.                         System.setErr(errorStream);  
57.   
58.                         ByteArrayOutputStream bos2 = new ByteArrayOutputStream();  
59.                         PrintStream outStream = new PrintStream(bos2, true);  
60.                         System.setOut(outStream);  
61.   
62.                         // Find the main method  
63.                         Class<?> c = Class.forName(className);  
64.                         Method main = c.getDeclaredMethod("main",String[].class);  
65.                         System.out.println("GetMain"+main.getName());  
66.   
67.                         // Emulate CLI parameters if necessary  
68.                         String[] params = null;  
69.                         if (className  
70.                                 .equals("com.lowagie.examples.objects.tables.pdfptable.FragmentTable")) {  
71.                             params = new String[] { "3" };  
72.                         } else if (className  
73.                                 .equals("com.lowagie.examples.objects.images.tiff.OddEven")) {  
74.                             params = new String[] { "odd.tif", "even.tif",  
75.                             "odd_even.tiff" };  
76.                         } else if (className  
77.                                 .equals("com.lowagie.examples.objects.images.tiff.Tiff2Pdf")) {  
78.                             params = new String[] { "tif_12.tif" };  
79.                         } else if (className  
80.                                 .equals("com.lowagie.examples.objects.images.DvdCover")) {  
81.                             params = new String[] { "dvdcover.pdf", "Title",  
82.                                     "0xff0000", "hitchcock.png" };  
83.                         } else if (className  
84.                                 .equals("com.lowagie.examples.forms.ListFields")) {  
85.                             params = new String[] {};  
86.                         } else if (className  
87.                                 .equals("com.lowagie.examples.general.read.Info")) {  
88.                             params = new String[] { "RomeoJuliet.pdf" };  
89.                         } else if (className  
90.                                 .equals("com.lowagie.examples.objects.anchors.OpenApplication")) {  
91.                             params = new String[] { "" };  
92.                         }  
93.   
94.                         main.invoke(null, (Object) params);  
95.   
96.                         // Parse results  
97.                         String string = new String(bos.toByteArray());  
98.                         String string2 = new String(bos2.toByteArray());  
99.                         if (string.length() > 0) {  
100.                             result = "Failed: " + string;  
101.                         } else if (string2.contains("Exception")) {  
102.                             result = "Failed: " + string2;  
103.                         } else if ("Images.pdf" != null) {  
104.                             File pdf = new File(  
105.                                     Environment.getExternalStorageDirectory()  
106.                                     + File.separator + "iTextTest"  
107.                                     + File.separator  
108.                                     + "Images.pdf");  
109.                             System.out.println("Create Pdf@");  
110.                             if (!pdf.exists()) {  
111.                                 result = "Failed: Resulting pdf didn't get created";  
112.                             } else if (pdf.length() <= 0) {  
113.                                 result = "Failed: Resulting pdf is empty";  
114.                             } else {  
115.                                 success++;  
116.                                 result = "Successful";  
117.                             }  
118.                         } else {  
119.                             success++;  
120.                             result = "Successful";  
121.                         }  
122.                     } catch (Exception e) {  
123.                         result = "Failed with exception: "  
124.                                 + e.getClass().getName() + ": "  
125.                                 + e.getMessage();  
126.                         System.out.println(result);  
127.                     }  
128.                     if (result.startsWith("Failed")) {  
129.                         System.out.println("Failed!");  
130.                     } else {  
131.                         System.out.println("Success!");  
132.                     }  
133.                     System.out.println(result);  
134.                 }  
135.   
136.             };  
137.             t.start();  
138.         }  
139.   
140.     }  
141.   
142. }  

package com.example.itexttest;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.PrintStream;import java.lang.reflect.Method;import android.os.Bundle;import android.os.Environment;import android.app.Activity;import android.view.Menu;import android.view.View;import android.widget.Button;import android.widget.Toast;public class ITextActivity extends Activity {private Button mButton;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_itext);mButton = (Button)findViewById(R.id.button1);mButton.setOnClickListener(new OnClickListenerImpl());}private class OnClickListenerImpl implements View.OnClickListener{@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stub//Toast.makeText(getApplicationContext(), "Run", Toast.LENGTH_SHORT).show();// Create droidtext directory for storing resultsFile file = new File(android.os.Environment.getExternalStorageDirectory()+ File.separator + "iTextTest");if (!file.exists()) {file.mkdir();}System.out.println("Click!");Thread t = new Thread() {public void run() {int success = 0;int count = 1;String className = "com.example.itexttest.HelloWprld";String result = null;try {// Set output streams to bytearray streams so we can// display the output of examplesByteArrayOutputStream bos = new ByteArrayOutputStream();PrintStream errorStream = new PrintStream(bos, true);System.setErr(errorStream);ByteArrayOutputStream bos2 = new ByteArrayOutputStream();PrintStream outStream = new PrintStream(bos2, true);System.setOut(outStream);// Find the main methodClass<?> c = Class.forName(className);Method main = c.getDeclaredMethod("main",String[].class);System.out.println("GetMain"+main.getName());// Emulate CLI parameters if necessaryString[] params = null;if (className.equals("com.lowagie.examples.objects.tables.pdfptable.FragmentTable")) {params = new String[] { "3" };} else if (className.equals("com.lowagie.examples.objects.images.tiff.OddEven")) {params = new String[] { "odd.tif", "even.tif","odd_even.tiff" };} else if (className.equals("com.lowagie.examples.objects.images.tiff.Tiff2Pdf")) {params = new String[] { "tif_12.tif" };} else if (className.equals("com.lowagie.examples.objects.images.DvdCover")) {params = new String[] { "dvdcover.pdf", "Title","0xff0000", "hitchcock.png" };} else if (className.equals("com.lowagie.examples.forms.ListFields")) {params = new String[] {};} else if (className.equals("com.lowagie.examples.general.read.Info")) {params = new String[] { "RomeoJuliet.pdf" };} else if (className.equals("com.lowagie.examples.objects.anchors.OpenApplication")) {params = new String[] { "" };}main.invoke(null, (Object) params);// Parse resultsString string = new String(bos.toByteArray());String string2 = new String(bos2.toByteArray());if (string.length() > 0) {result = "Failed: " + string;} else if (string2.contains("Exception")) {result = "Failed: " + string2;} else if ("Images.pdf" != null) {File pdf = new File(Environment.getExternalStorageDirectory()+ File.separator + "iTextTest"+ File.separator+ "Images.pdf");System.out.println("Create Pdf@");if (!pdf.exists()) {result = "Failed: Resulting pdf didn't get created";} else if (pdf.length() <= 0) {result = "Failed: Resulting pdf is empty";} else {success++;result = "Successful";}} else {success++;result = "Successful";}} catch (Exception e) {result = "Failed with exception: "+ e.getClass().getName() + ": "+ e.getMessage();System.out.println(result);}if (result.startsWith("Failed")) {System.out.println("Failed!");} else {System.out.println("Success!");}System.out.println(result);}};t.start();}}}

OnClick里面的代码有点小复杂，要用的的话直接粘就可以了，注意修改相应的变量名,classname对应对就是操作itext生产pdf的类。

在包里面再创建两个测试类：

HelloWorld.java

[java] view plaincopyprint?

1. package com.example.itexttest;  
2.   
3. import java.io.FileOutputStream;  
4. import java.io.IOException;  
5.   
6. import com.lowagie.text.Document;  
7. import com.lowagie.text.DocumentException;  
8. import com.lowagie.text.Paragraph;  
9. import com.lowagie.text.pdf.PdfWriter;  
10.   
11. /** 
12.  * Generates a simple 'Hello World' PDF file. 
13.  *  
14.  * @author blowagie 
15.  */  
16.   
17. public class HelloWorld {  
18.   
19.         /** 
20.          * Generates a PDF file with the text 'Hello World' 
21.          *  
22.          * @param args 
23.          *            no arguments needed here 
24.          */  
25.         public static void main(String[] args) {  
26.   
27.                 System.out.println("Hello World");  
28.   
29.                 // step 1: creation of a document-object  
30.                 Document document = new Document();  
31.                 try {  
32.                         // step 2:  
33.                         // we create a writer that listens to the document  
34.                         // and directs a PDF-stream to a file  
35.                         PdfWriter.getInstance(document, new FileOutputStream(android.os.Environment.getExternalStorageDirectory() + java.io.File.separator + "iTextTest" + java.io.File.separator + "HelloWorld.pdf"));  
36.   
37.                         // step 3: we open the document  
38.                         document.open();  
39.                         // step 4: we add a paragraph to the document  
40.                         document.add(new Paragraph("Hello World"));  
41.                 } catch (DocumentException de) {  
42.                         System.err.println(de.getMessage());  
43.                 } catch (IOException ioe) {  
44.                         System.err.println(ioe.getMessage());  
45.                 }  
46.   
47.                 // step 5: we close the document  
48.                 document.close();  
49.         }  
50. }  

package com.example.itexttest;import java.io.FileOutputStream;import java.io.IOException;import com.lowagie.text.Document;import com.lowagie.text.DocumentException;import com.lowagie.text.Paragraph;import com.lowagie.text.pdf.PdfWriter;/** * Generates a simple 'Hello World' PDF file. *  * @author blowagie */public class HelloWorld {        /**         * Generates a PDF file with the text 'Hello World'         *          * @param args         *            no arguments needed here         */        public static void main(String[] args) {                System.out.println("Hello World");                // step 1: creation of a document-object                Document document = new Document();                try {                        // step 2:                        // we create a writer that listens to the document                        // and directs a PDF-stream to a file                        PdfWriter.getInstance(document, new FileOutputStream(android.os.Environment.getExternalStorageDirectory() + java.io.File.separator + "iTextTest" + java.io.File.separator + "HelloWorld.pdf"));                        // step 3: we open the document                        document.open();                        // step 4: we add a paragraph to the document                        document.add(new Paragraph("Hello World"));                } catch (DocumentException de) {                        System.err.println(de.getMessage());                } catch (IOException ioe) {                        System.err.println(ioe.getMessage());                }                // step 5: we close the document                document.close();        }}

生产Pdf如下：

Rotating.java（创建图片，并旋转）

注意再sdcard的根目录里面放一张图片，改名jxk_run.png。

[java] view plaincopyprint?

1. /* 
2.  * $Id: Rotating.java 3373 2008-05-12 16:21:24Z xlv $ 
3.  * 
4.  * This code is part of the 'iText Tutorial'. 
5.  * You can find the complete tutorial at the following address: 
6.  * http://itextdocs.lowagie.com/tutorial/ 
7.  * 
8.  * This code is distributed in the hope that it will be useful, 
9.  * but WITHOUT ANY WARRANTY; without even the implied warranty of 
10.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
11.  * 
12.  * [e-mail] 
13.  */  
14. package com.example.itexttest;  
15.   
16. import java.io.ByteArrayOutputStream;  
17. import java.io.FileOutputStream;  
18. import java.io.IOException;  
19. import com.example.itexttest.R;  
20. import com.example.itexttest.ITextActivity;  
21.   
22. import android.graphics.Bitmap;  
23. import android.graphics.BitmapFactory;  
24.   
25. import com.lowagie.text.Document;  
26. import com.lowagie.text.DocumentException;  
27. import com.lowagie.text.Image;  
28. import com.lowagie.text.Paragraph;  
29. import com.lowagie.text.pdf.PdfWriter;  
30.   
31. /** 
32.  * Rotating images. 
33.  */  
34. public class Rotating {  
35.     /** 
36.      * Rotating images. 
37.      *  
38.      * @param args 
39.      *            No arguments needed 
40.      */  
41.     public static void main(String[] args) {  
42.   
43.         System.out.println("Rotating an Image");  
44.   
45.         // step 1: creation of a document-object  
46.         Document document = new Document();  
47.   
48.         try {  
49.   
50.             // step 2:  
51.             // we create a writer that listens to the document  
52.             // and directs a PDF-stream to a file  
53.   
54.             PdfWriter.getInstance(document, new FileOutputStream(android.os.Environment.getExternalStorageDirectory() + java.io.File.separator +  "iTextTest"  + java.io.File.separator + "rotating.pdf"));  
55.   
56.             // step 3: we open the document  
57.             document.open();  
58.   
59.             // step 4: we add content  
60.             //Can't use filename => use byte[] instead  
61. //          Image jpg4 = Image.getInstance("otsoe.jpg");  
62.             ByteArrayOutputStream stream = new ByteArrayOutputStream();  
63.             //Bitmap bitmap = BitmapFactory.decodeResource(ITextActivity.getActivity().getResources(), R.drawable.otsoe);  
64.             Bitmap bitmap = BitmapFactory.decodeFile("/mnt/sdcard/jxk_run.png");  
65.             bitmap.compress(Bitmap.CompressFormat.JPEG /* FileType */,100 /* Ratio */, stream);  
66.             Image jpg = Image.getInstance(stream.toByteArray());  
67.             jpg.setAlignment(Image.MIDDLE);  
68.   
69.             jpg.setRotation((float) Math.PI / 6);  
70.             document.add(new Paragraph("rotate 30 degrees"));  
71.             document.add(jpg);  
72.             document.newPage();  
73.   
74.             jpg.setRotation((float) Math.PI / 4);  
75.             document.add(new Paragraph("rotate 45 degrees"));  
76.             document.add(jpg);  
77.             document.newPage();  
78.   
79.             jpg.setRotation((float) Math.PI / 2);  
80.             document.add(new Paragraph("rotate pi/2 radians"));  
81.             document.add(jpg);  
82.             document.newPage();  
83.   
84.             jpg.setRotation((float) (Math.PI * 0.75));  
85.             document.add(new Paragraph("rotate 135 degrees"));  
86.             document.add(jpg);  
87.             document.newPage();  
88.   
89.             jpg.setRotation((float) Math.PI);  
90.             document.add(new Paragraph("rotate pi radians"));  
91.             document.add(jpg);  
92.             document.newPage();  
93.   
94.             jpg.setRotation((float) (2.0 * Math.PI));  
95.             document.add(new Paragraph("rotate 2 x pi radians"));  
96.             document.add(jpg);  
97.         } catch (DocumentException de) {  
98.             System.err.println(de.getMessage());  
99.         } catch (IOException ioe) {  
100.             System.err.println(ioe.getMessage());  
101.         }  
102.   
103.         // step 5: we close the document  
104.         document.close();  
105.     }  
106.   
107. }  

/* * $Id: Rotating.java 3373 2008-05-12 16:21:24Z xlv $ * * This code is part of the 'iText Tutorial'. * You can find the complete tutorial at the following address: * http://itextdocs.lowagie.com/tutorial/ * * This code is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * [e-mail] */package com.example.itexttest;import java.io.ByteArrayOutputStream;import java.io.FileOutputStream;import java.io.IOException;import com.example.itexttest.R;import com.example.itexttest.ITextActivity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import com.lowagie.text.Document;import com.lowagie.text.DocumentException;import com.lowagie.text.Image;import com.lowagie.text.Paragraph;import com.lowagie.text.pdf.PdfWriter;/** * Rotating images. */public class Rotating {/** * Rotating images. *  * @param args *            No arguments needed */public static void main(String[] args) {System.out.println("Rotating an Image");// step 1: creation of a document-objectDocument document = new Document();try {// step 2:// we create a writer that listens to the document// and directs a PDF-stream to a filePdfWriter.getInstance(document, new FileOutputStream(android.os.Environment.getExternalStorageDirectory() + java.io.File.separator +  "iTextTest"  + java.io.File.separator + "rotating.pdf"));// step 3: we open the documentdocument.open();// step 4: we add content//Can't use filename => use byte[] instead//Image jpg4 = Image.getInstance("otsoe.jpg");ByteArrayOutputStream stream = new ByteArrayOutputStream();//Bitmap bitmap = BitmapFactory.decodeResource(ITextActivity.getActivity().getResources(), R.drawable.otsoe);Bitmap bitmap = BitmapFactory.decodeFile("/mnt/sdcard/jxk_run.png");bitmap.compress(Bitmap.CompressFormat.JPEG /* FileType */,100 /* Ratio */, stream);Image jpg = Image.getInstance(stream.toByteArray());jpg.setAlignment(Image.MIDDLE);jpg.setRotation((float) Math.PI / 6);document.add(new Paragraph("rotate 30 degrees"));document.add(jpg);document.newPage();jpg.setRotation((float) Math.PI / 4);document.add(new Paragraph("rotate 45 degrees"));document.add(jpg);document.newPage();jpg.setRotation((float) Math.PI / 2);document.add(new Paragraph("rotate pi/2 radians"));document.add(jpg);document.newPage();jpg.setRotation((float) (Math.PI * 0.75));document.add(new Paragraph("rotate 135 degrees"));document.add(jpg);document.newPage();jpg.setRotation((float) Math.PI);document.add(new Paragraph("rotate pi radians"));document.add(jpg);document.newPage();jpg.setRotation((float) (2.0 * Math.PI));document.add(new Paragraph("rotate 2 x pi radians"));document.add(jpg);} catch (DocumentException de) {System.err.println(de.getMessage());} catch (IOException ioe) {System.err.println(ioe.getMessage());}// step 5: we close the documentdocument.close();}}

生产PDF如下：