如何将xml布局转换为pdf中的android

Question

我尝试了很多在互联网上搜索，但我没有找到任何解决方案。我的问题是我有一个名为main.xml的布局，其父布局是一个LinearLayout，它可以滚动。我想生成该布局的PDF。布局由报告组成，所以我想以pdf格式导出这些报告。我该怎么做请帮忙。

Answer 1

最后，我得到了我的问题的解决方案。现在我可以使用itextpdf.jar文件轻松地将任何视图转换为PDF。我会在这里发布我的代码。该方法将以位图格式保存视图。

public void saveViewImage(View view){ 
    File file = saveBitMap(this, layout); //which view you want to pass that view as parameter 
    if (file != null) { 
     Log.i("TAG", "Drawing saved to the gallery!"); 
    } else { 
     Log.i("TAG", "Oops! Image could not be saved."); 
    } 
} 

private File saveBitMap(Context context, View drawView){ 
    File pictureFileDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),"Handcare"); 
    if (!pictureFileDir.exists()) { 
     boolean isDirectoryCreated = pictureFileDir.mkdirs(); 
     if(!isDirectoryCreated) 
      Log.i("ATG", "Can't create directory to save the image"); 
     return null; 
    } 
    String filename = pictureFileDir.getPath() +File.separator+ System.currentTimeMillis()+".jpg"; 
    File pictureFile = new File(filename); 
    Bitmap bitmap =getBitmapFromView(drawView); 
    try { 
     createPdf(bitmap); 
    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } catch (DocumentException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
    try { 
     pictureFile.createNewFile(); 
     FileOutputStream oStream = new FileOutputStream(pictureFile); 
     bitmap.compress(Bitmap.CompressFormat.PNG, 100, oStream); 
     oStream.flush(); 
     oStream.close(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
     Log.i("TAG", "There was an issue saving the image."); 
    } 
    scanGallery(context,pictureFile.getAbsolutePath()); 
    return pictureFile; 
} 
//create bitmap from view and returns it 
private Bitmap getBitmapFromView(View view) { 
    //Define a bitmap with the same size as the view 
    Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),Bitmap.Config.ARGB_8888); 
    //Bind a canvas to it 
    Canvas canvas = new Canvas(returnedBitmap); 
    //Get the view's background 
    Drawable bgDrawable =view.getBackground(); 
    if (bgDrawable!=null) { 
     //has background drawable, then draw it on the canvas 
     bgDrawable.draw(canvas); 
    } else{ 
     //does not have background drawable, then draw white background on the canvas 
     canvas.drawColor(Color.WHITE); 
    } 
    // draw the view on the canvas 
    view.draw(canvas); 
    //return the bitmap 
    return returnedBitmap; 
} 

现在下面方法被用来生成PDF

private void createPdf(Bitmap bitmap) throws IOException, DocumentException { 

    ByteArrayOutputStream stream = new ByteArrayOutputStream(); 
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream); 
    Image signature; 
    signature = Image.getInstance(stream.toByteArray()); 
    signature.setAbsolutePosition(50f, 100f); 
    signature.scalePercent(60f); 
    //Image image = Image.getInstance(byteArray); 
    File pdfFolder = new File(Environment.getExternalStoragePublicDirectory(
      Environment.DIRECTORY_DOCUMENTS), "pdfdemo"); 
    if (!pdfFolder.exists()) { 
     pdfFolder.mkdirs(); 
     Log.i("Created", "Pdf Directory created"); 
    } 

    //Create time stamp 
    Date date = new Date() ; 
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(date); 

    File myFile = new File(pdfFolder + timeStamp + ".pdf"); 

    OutputStream output = new FileOutputStream(myFile); 
    //Step 1 
    Document document = new Document(); 

    //Step 2 
    PdfWriter.getInstance(document, output); 

    //Step 3 
    document.open(); 

    //Step 4 Add content 
    document.add(signature); 
    //document.add(new Paragraph(text.getText().toString())); 
    //document.add(new Paragraph(mBodyEditText.getText().toString())); 

    //Step 5: Close the document 
    document.close(); 
}