Question

我想创建一个＆＃34;整页的PDF＆＃34;活动。该视图包含一个包含许多项目的RecyclerView。

我可以查看我的Recyclerview的完整尺寸，但文件仅绘制当前视图。这是我的代码：

    public void tela (){ // create a new document
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)

    {
        PdfDocument document = new PdfDocument();

        getScreenshotFromRecyclerView(mRecyclerView);
        content = mRecyclerView;
        content.setBackgroundColor(Color.parseColor("#303030"));


        PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(wil,
                height, 1).create();

    // create a new page from the PageInfo
        PdfDocument.Page page = document.startPage(pageInfo);

    // repaint the user's text into the page
        content.draw(page.getCanvas());

    // do final processing of the page
        document.finishPage(page);

    // saving pdf document to sdcard
        SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy - HH-mm-ss",Locale.getDefault());
        String pdfName = "Revisões_"
                + sdf.format(Calendar.getInstance().getTime()) + ".pdf";

    // all created files will be saved at path /sdcard/PDFDemo_AndroidSRC/
        File outputFile = new File(Environment.getExternalStorageDirectory().getPath(), pdfName);

        try {
            outputFile.createNewFile();
            OutputStream out = new FileOutputStream(outputFile);
            document.writeTo(out);
            document.close();
            out.close();
            Toast.makeText(this,"PDF gerado com sucesso",Toast.LENGTH_SHORT).show();
            Log.i("Gerou", "pdf");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

//获得限制

    public void getScreenshotFromRecyclerView(RecyclerView view) {
    RecyclerView.Adapter adapter = view.getAdapter();
    if (adapter != null) {
        int size = adapter.getItemCount();

        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());
            height += holder.itemView.getMeasuredHeight();
        }
        wil=view.getMeasuredWidth();


    }
}

结果如下：

我可以使用我的Recyclerview的所有值创建pdf吗？

感谢。

Answer 1

我实现了一个帮助程序类来处理图像保存到PDF。在方法saveImageToPDF（）中，我传递了：

一个TabLayout，位于我的recyclerView
recyclerView的位图
上下文

获取使用此Take a screenshot of RecyclerView in FULL length

的recyclerView位图

public class PDFHelper {

    private File mFolder;
    private File mFile;
    private Context mContext;

    public PDFHelper(File folder, Context context) {

        this.mContext = context;
        this.mFolder = folder;

        if(!mFolder.exists())
            mFolder.mkdirs();
    }

    public void saveImageToPDF(View title, Bitmap bitmap, String filename) {

        mFile = new File(mFolder, filename + ".pdf");
        if (!mFile.exists()) {
            int height = title.getHeight() + bitmap.getHeight();
            PdfDocument document = new PdfDocument();
            PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(bitmap.getWidth(), height, 1).create();
            PdfDocument.Page page = document.startPage(pageInfo);
            Canvas canvas = page.getCanvas();
            title.draw(canvas);

            canvas.drawBitmap(bitmap, null, new Rect(0, title.getHeight(), bitmap.getWidth(),bitmap.getHeight()), null);

            document.finishPage(page);

            try {
                mFile.createNewFile();
                OutputStream out = new FileOutputStream(mFile);
                document.writeTo(out);
                document.close();
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}

Answer 2

我找到了一种更简单的方法。我不确定我的代码是否干净或者这是正确的方法。我有一个可变大小的回收者视图。我想用pdf打印回收站视图的整个长度。我也使用IText Pdf作为参考。

我做的事情。下面是recycler视图中单个项目的XML文件。请注意我已经给卡片视图提供了一个ID，因为我使用了卡片视图（你可以使用任何你想要的根，LinearLayout或RelativeLayout等）android：id =＆＃34; @ + id / preview_order_list_card_root＆＃34 ;

       if(yourMove == 1 && compInt == 1)
          System.out.println("Tie");
        else if (yourMove== 1 && compInt == 2)
            System.out.println("You Win! Monkey Unplugs Robot!");
        else if (yourMove== 1 && compInt == 3)
            System.out.println("You Lose! Pirate Skewers Monkey!");
        else if (yourMove == 1 && compInt == 4)
            System.out.println("You Win! Monkey fools Ninja!");
        else if (yourMove== 1 && compInt == 5)
            System.out.println("You Lose! Zombie savages monkey!");

现在在您的适配器中，只需创建一个带有getter和setter的arraylist，它将在调用onBindViewHolder时保存卡视图对象，如下所示。

    <?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/preview_order_list_card_root"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="5dp"
    android:layout_marginBottom="5dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="5dp">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <ImageView
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_gravity="center_horizontal"
                    android:src="@drawable/car"/>

                <TextView
                    android:layout_width="1dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:background="@android:color/darker_gray"
                    android:text="12"/>

                <TextView
                    android:id="@+id/preview_car_name"
                    android:layout_width="90dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:layout_marginTop="7dp"
                    android:gravity="center"
                    android:textSize="20sp"
                    android:textStyle="bold"/>

                <TextView
                    android:id="@+id/preview_car_model"
                    android:layout_width="90dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:gravity="center"/>

            </LinearLayout>

            <TextView
                android:layout_width="1dp"
                android:layout_height="match_parent"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                android:background="@android:color/darker_gray"/>

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/preview_part_name"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:layout_marginTop="7dp"
                    android:gravity="center"
                    android:textSize="20sp"
                    android:textStyle="bold"/>

                <TextView
                    android:id="@+id/preview_part_model"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:layout_marginBottom="7dp"
                    android:gravity="center"/>

                <TextView
                    android:layout_width="1dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:background="@android:color/darker_gray"
                    android:text="12"/>

                <ImageView
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:layout_gravity="center_horizontal"
                    android:src="@drawable/car_part"/>

            </LinearLayout>

            <TextView
                android:layout_width="1dp"
                android:layout_height="match_parent"
                android:layout_marginLeft="5dp"
                android:background="@android:color/darker_gray"/>

            <LinearLayout
                android:layout_width="70dp"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_marginLeft="5dp"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/preview_quantity"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="@android:color/holo_green_light"
                    android:gravity="center"
                    android:textSize="25sp"
                    android:layout_gravity="center"/>

                <TextView
                    android:id="@+id/preview_quantity_bucket"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:layout_marginTop="15dp"
                    android:gravity="center"/>

            </LinearLayout>

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:layout_margin="15dp"
            android:orientation="vertical">

            <TextView
                android:id="@+id/preview_extra_info"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:gravity="center"/>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:layout_marginTop="15dp">

                <TextView
                    android:id="@+id/preview_ordered_from"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:textColor="@android:color/holo_red_light"/>

                <TextView
                    android:id="@+id/preview_list_price"
                    android:layout_width="100dp"
                    android:layout_height="wrap_content"
                    android:gravity="center"/>

                <TextView
                    android:id="@+id/preview_list_less"
                    android:layout_width="80dp"
                    android:layout_height="wrap_content"
                    android:gravity="right"/>

            </LinearLayout>

        </LinearLayout>

    </LinearLayout>

</android.support.v7.widget.CardView>

现在最后，在打印回收站视图时执行此操作。

private static ArrayList<CardView> cardViewArrayList = new ArrayList<>();

@Override
    public void onBindViewHolder(final PreviewOrderAdapter.MyViewHolder holder, int position)
    {
        OrderItemDetailsModel orderItemDetailsModel = namesArrList.get(position);
        holder.orderedFrom.setText(orderItemDetailsModel.getOrderedFrom());
        holder.listPrice.setText(orderItemDetailsModel.getListPrice());
        holder.listLess.setText(orderItemDetailsModel.getListLess());

        // ADDING THE CARD VIEW OBJECT IN THE ARRAYLIST
        addCardView(holder.cardView);
    }

    @Override
    public int getItemCount()
    {
        return namesArrList.size();
    }

    private static void addCardView(CardView cardView)
    {
        cardViewArrayList.add(cardView);
    }

    public static ArrayList<CardView> getCardViewList()
    {
        return cardViewArrayList;
    }

通过这种方式，我们不必担心由于回收器视图的大尺寸导致的内存泄漏，因为我们将每个视图分别添加到文档中。

全速创建RecyclerView的PDF

2 个答案: