我可以使用 iText 在 android 应用程序中生成 PDF 文件，因此生成了 PDF 文档，但是，
图像不包含在 PDF 文件中。
【问题讨论】：
这里是代码：（在日志语句中解释）
String path = null ;
File file=new File("/mnt/sdcard/PDFfiles");
File f = new File(file, "MyPDFFILE.pdf");
Log.v("stage 1","store the pdf in sd card");
Document document = new Document(PageSize.A4, 38, 38, 50, 38);
Log.v("stage 2","Document Created");
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(path));
Log.v("Stage 3", "Pdf writer");
document.open();
Log.v("Stage 4", "Document opened");
document.add(new Paragraph("First Paragraph"));
Log.v("Stage 5", "Creating Paragraph");
Image image = Image.getInstance ("/mnt/sdcard/images/3_5_9_0001.jpg");
Log.v("Stage 6", "Image path adding");
image.setAlignment(Image.MIDDLE| Image.TEXTWRAP);
Log.v("Stage 7", "Image Alignments");
image.setBorder(Image.BOX);
image.setBorderWidth(15);
document.add(image);
Log.v("Stage 8", "Image adding");
document.close();
Log.v("Stage 7", "Document Closed");
【讨论】：
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.Date;
import com.itextpdf.text.Anchor;
import com.itextpdf.text.BadElementException;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Chapter;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.Image;
import com.itextpdf.text.List;
import com.itextpdf.text.ListItem;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.Section;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfWriter;
import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.TextView;
public class Main extends Activity {
private static String FILE = Environment.getExternalStorageDirectory()+File.separator+"firstPdf.pdf";
private static Font catFont = new Font(Font.FontFamily.TIMES_ROMAN, 18,
Font.BOLD);
private static Font redFont = new Font(Font.FontFamily.TIMES_ROMAN, 12,
Font.NORMAL, BaseColor.RED);
private static Font subFont = new Font(Font.FontFamily.TIMES_ROMAN, 16,
Font.BOLD);
private static Font smallBold = new Font(Font.FontFamily.TIMES_ROMAN, 12,
Font.BOLD);
TextView txt1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
txt1=(TextView) findViewById(R.id.textView1);
try {
Document document = new Document();
PdfWriter.getInstance(document, new FileOutputStream(FILE));
document.open();
addMetaData(document);
addTitlePage(document);
addContent(document);
//createImage();
document.close();
} catch (Exception e) {
e.printStackTrace();
}
}
private static void addMetaData(Document document) {
document.addTitle("My first PDF");
document.addSubject("Using iText");
document.addKeywords("Java, PDF, iText");
document.addAuthor("Lars Vogel");
document.addCreator("Lars Vogel");
}
private static void addTitlePage(Document document)
throws DocumentException {
Paragraph preface = new Paragraph();
// We add one empty line
addEmptyLine(preface, 1);
// Lets write a big header
preface.add(new Paragraph("Title of the document", catFont));
addEmptyLine(preface, 1);
// Will create: Report generated by: _name, _date
preface.add(new Paragraph(
"Report generated by: " + System.getProperty("user.name") + ", " + new Date(), //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
smallBold));
addEmptyLine(preface, 3);
preface.add(new Paragraph(
"This document describes something which is very important ",
smallBold));
addEmptyLine(preface, 8);
preface.add(new Paragraph(
"This document is a preliminary version and not subject to your license agreement or any other agreement with vogella.de ;-).",
redFont));
document.add(preface);
// Start a new page
document.newPage();
}
private static void addContent(Document document) throws DocumentException {
Anchor anchor = new Anchor("ESTIMATING APP", catFont);
anchor.setName("ESTIMATING APP");
// Second parameter is the number of the chapter
Chapter catPart = new Chapter(new Paragraph(anchor), 1);
Paragraph subPara = new Paragraph("Subcategory 1", subFont);
Section subCatPart = catPart.addSection(subPara);
subCatPart.add(new Paragraph("Hello"));
subPara = new Paragraph("Subcategory 2", subFont);
subCatPart = catPart.addSection(subPara);
subCatPart.add(new Paragraph("Paragraph 1"));
subCatPart.add(new Paragraph("Paragraph 2"));
subCatPart.add(new Paragraph("Paragraph 3"));
// Add a list
createList(subCatPart);
Paragraph paragraph = new Paragraph();
addEmptyLine(paragraph, 5);
subCatPart.add(paragraph);
// Add a table
createTable(subCatPart);
// Now add all this to the document
document.add(catPart);
// Next section
anchor = new Anchor("Second Chapter", catFont);
anchor.setName("Second Chapter");
// Second parameter is the number of the chapter
catPart = new Chapter(new Paragraph(anchor), 1);
subPara = new Paragraph("Subcategory", subFont);
subCatPart = catPart.addSection(subPara);
subCatPart.add(new Paragraph("This is a very important message"));
// Now add all this to the document
document.add(catPart);
}
private static void createTable(Section subCatPart)
throws BadElementException {
PdfPTable table = new PdfPTable(3);
// t.setBorderColor(BaseColor.GRAY);
// t.setPadding(4);
// t.setSpacing(4);
// t.setBorderWidth(1);
PdfPCell c1 = new PdfPCell(new Phrase("Job Name:"));
c1.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(c1);
c1 = new PdfPCell(new Phrase("Test 001"));
c1.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(c1);
c1 = new PdfPCell(new Phrase(""));
c1.setHorizontalAlignment(Element.ALIGN_CENTER);
table.addCell(c1);
table.setHeaderRows(1);
table.addCell("Date:");
table.addCell("1.1");
table.addCell("");
table.addCell("Labor Rate:");
table.addCell("2.2");
table.addCell("");
table.addCell("Labor Cost:");
table.addCell("3.2");
table.addCell("3.3");
subCatPart.add(table);
}
private static void createList(Section subCatPart) {
List list = new List(true, false, 10);
list.add(new ListItem("First point"));
list.add(new ListItem("Second point"));
list.add(new ListItem("Third point"));
subCatPart.add(list);
}
private static void addEmptyLine(Paragraph paragraph, int number) {
for (int i = 0; i < number; i++) {
paragraph.add(new Paragraph(" "));
}
}
【讨论】：
Pdf 像图片一样
使用下面的 MainActivity 代码生成 pdf
public class MainActivity extends AppCompatActivity {
Button btnCreatePdf;
TextView tv_title;
TextView tv_sub_title;
TextView tv_location;
TextView tv_city;
String file_name_path = "";
int PERMISSION_ALL = 1;
String[] PERMISSIONS = {
android.Manifest.permission.WRITE_EXTERNAL_STORAGE,
android.Manifest.permission.READ_EXTERNAL_STORAGE,
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
if (!hasPermissions(MainActivity.this, PERMISSIONS)) {
ActivityCompat.requestPermissions(MainActivity.this, PERMISSIONS, PERMISSION_ALL);
}
File file = new File(this.getExternalFilesDir(null).getAbsolutePath(), "pdfsdcard_location");
if (!file.exists()) {
file.mkdir();
}
//this.getExternalFilesDir(null)?.getAbsolutePath()
btnCreatePdf = findViewById(R.id.btnCreatePdf);
tv_title = findViewById(R.id.tv_title);
tv_sub_title = findViewById(R.id.tv_sub_title);
tv_location = findViewById(R.id.tv_location);
tv_city = findViewById(R.id.tv_city);
btnCreatePdf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
createpdf();
}
});
}
public void createpdf() {
Rect bounds = new Rect();
int pageWidth = 300;
int pageheight = 470;
int pathHeight = 2;
final String fileName = "mypdf";
file_name_path = "/pdfsdcard_location/" + fileName + ".pdf";
PdfDocument myPdfDocument = new PdfDocument();
Paint paint = new Paint();
Paint paint2 = new Paint();
Path path = new Path();
PdfDocument.PageInfo myPageInfo = new PdfDocument.PageInfo.Builder(pageWidth, pageheight, 1).create();
PdfDocument.Page documentPage = myPdfDocument.startPage(myPageInfo);
Canvas canvas = documentPage.getCanvas();
int y = 25; // x = 10,
//int x = (canvas.getWidth() / 2);
int x = 10;
paint.getTextBounds(tv_title.getText().toString(), 0, tv_title.getText().toString().length(), bounds);
x = (canvas.getWidth() / 2) - (bounds.width() / 2);
canvas.drawText(tv_title.getText().toString(), x, y, paint);
paint.getTextBounds(tv_sub_title.getText().toString(), 0, tv_sub_title.getText().toString().length(), bounds);
x = (canvas.getWidth() / 2) - (bounds.width() / 2);
y += paint.descent() - paint.ascent();
canvas.drawText(tv_sub_title.getText().toString(), x, y, paint);
y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);
//horizontal line
path.lineTo(pageWidth, pathHeight);
paint2.setColor(Color.GRAY);
paint2.setStyle(Paint.Style.STROKE);
path.moveTo(x, y);
canvas.drawLine(0, y, pageWidth, y, paint2);
//blank space
y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);
y += paint.descent() - paint.ascent();
x = 10;
canvas.drawText(tv_location.getText().toString(), x, y, paint);
y += paint.descent() - paint.ascent();
x = 10;
canvas.drawText(tv_city.getText().toString(), x, y, paint);
//blank space
y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);
//horizontal line
path.lineTo(pageWidth, pathHeight);
paint2.setColor(Color.GRAY);
paint2.setStyle(Paint.Style.STROKE);
path.moveTo(x, y);
canvas.drawLine(0, y, pageWidth, y, paint2);
//blank space
y += paint.descent() - paint.ascent();
canvas.drawText("", x, y, paint);
Resources res = getResources();
Bitmap bitmap = BitmapFactory.decodeResource(res, R.drawable.logo);
Bitmap b = (Bitmap.createScaledBitmap(bitmap, 100, 50, false));
canvas.drawBitmap(b, x, y, paint);
y += 25;
canvas.drawText(getString(R.string.app_name), 120, y, paint);
myPdfDocument.finishPage(documentPage);
File file = new File(this.getExternalFilesDir(null).getAbsolutePath() + file_name_path);
try {
myPdfDocument.writeTo(new FileOutputStream(file));
} catch (IOException e) {
e.printStackTrace();
}
myPdfDocument.close();
viewPdfFile();
}
public void viewPdfFile() {
File file = new File(this.getExternalFilesDir(null).getAbsolutePath() + file_name_path);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
startActivity(intent);
}
public static boolean hasPermissions(Context context, String... permissions) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && context != null && permissions != null) {
for (String permission : permissions) {
if (ActivityCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
return false;
}
}
}
return true;
}
}
从 GitHub 下载完整源代码：https://github.com/enamul95/CreatePdf.git
【讨论】：