Question

我正在尝试生成一些列表以发送给pdf。我能够将所有项目生成为pdf，但是每个项目只能生成一页。我想生成一个分页列表。到目前为止，我的代码：

获取标题（layout_relatorio）。

填充recyclerView。

List<Bitmap> pegarBitmapsListaTeste(View pagina1, RecyclerView view) {

List<Bitmap> listaBitmaps = new ArrayList<>();
RecyclerView.Adapter adapter = view.getAdapter();
if (adapter != null) {
    int size = adapter.getItemCount();

    LinearLayoutManager layoutManagerr = ((LinearLayoutManager)view.getLayoutManager());
    int findFirstVisibleItemPosition = layoutManagerr.findFirstVisibleItemPosition();
    int findLastVisibleItemPosition = layoutManagerr.findLastCompletelyVisibleItemPosition();

    pagina1.measure(View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
            View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));

    pagina1.layout(0, 0, pagina1.getMeasuredWidth(), pagina1.getMeasuredWidth());
    pagina1.setDrawingCacheEnabled(true);
    pagina1.buildDrawingCache();
    listaBitmaps.add(pagina1.getDrawingCache());

    final int maxItens = findLastVisibleItemPosition;

    final int TOTAL_NUM_ITEMS=size;
    final int ITEMS_PER_PAGE=maxItens;
    final int ITEMS_REMAINING=TOTAL_NUM_ITEMS % ITEMS_PER_PAGE;
    final int LAST_PAGE=TOTAL_NUM_ITEMS/ITEMS_PER_PAGE;

    Log.i("dados quantPaginas", String.valueOf(LAST_PAGE));

    for (int i = 0; i < size; i++) {
        RecyclerView.ViewHolder holder = adapter.createViewHolder(view, adapter.getItemViewType(i));
        adapter.onBindViewHolder(holder, i);
        holder.itemView.measure(View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
        holder.itemView.layout(0, 0, holder.itemView.getMeasuredWidth(), holder.itemView.getMeasuredHeight());


        View childView      = holder.itemView;
        childView.measure(View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));


        childView.layout(0, 0, childView.getMeasuredWidth(), childView.getMeasuredHeight());
        childView.setDrawingCacheEnabled(true);
        childView.buildDrawingCache();
        listaBitmaps.add(childView.getDrawingCache());

        Log.i("dados loop", String.valueOf(i));

    }


}
return listaBitmaps;
}

然后我有另一种方法来使用位图列表并生成pdf文件。

    private void createPdff(List<Bitmap> bitmaps, String nomePdf) {


    PdfDocument document = new PdfDocument();
    PdfDocument.Page page = null;

    // crate a page description
    for (int i = 0; i < bitmaps.size(); i++) {
        Bitmap bitmap = bitmaps.get(i);
        PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(layout_relatorio.getWidth(), layout_relatorio.getHeight(), i).create();

          // start a page
        page = document.startPage(pageInfo);
        if (page == null) {
            return;
        }
        Canvas canvas = page.getCanvas();
        canvas.drawBitmap(bitmap, 0, 0, null);
        document.finishPage(page);
        Log.i("dados", "chegou aqui no Finish Him");
    }

    // do final processing of the page
    File folder = new File(Objects.requireNonNull(getActivity()).getApplicationContext().getFilesDir() + File.separator + "pdfs");
    boolean success = true;
    if (!folder.exists()) {
        success = folder.mkdirs();
    }
    if (success) {
        // Do something on success
    } else {
        // Do something else on failure
    }
    File outputFile = new File(Objects.requireNonNull(getActivity()).getApplicationContext().getFilesDir()  + "/pdfs/", nomePdf);

    try {
        outputFile.createNewFile();
        OutputStream out = new FileOutputStream(outputFile);
        document.writeTo(out);
        document.close();
        out.close();

        localPdf = FileProvider.getUriForFile(Objects.requireNonNull(getActivity()), "vnm.com.simasdapp", outputFile);

    } catch (IOException e) {
        e.printStackTrace();
        Log.i("dados 5", e.getMessage());
    }

}

这样，我生成了很多小页面。结果：

我需要什么：

谢谢。

从RecyclerView生成分页的Pdf

0 个答案: