Контент не отображается после клика на создание PDF

Question

Привет ниже, когда нажмете на создание pdf. Я вызываю метод create pdf. Нажмите на кнопку. Pdf scrollview создан.

Но ничего не отображается после нажатия на pdf. Может ли какая-либо помощь, почему данные не отображается в android. файл существует во внешней памяти хранения в android .но данных там нет

Может ли кто-нибудь помочь мне решить эту проблему.

xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/contact_card"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">


    <FrameLayout
        android:id="@+id/frame_container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_anchorGravity="center"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" >


        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:id="@+id/card_details">

            <Button
                android:id="@+id/btn"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Create PDF" />

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:id="@+id/cards">
                <androidx.cardview.widget.CardView
                    android:id="@+id/cardView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    app:cardBackgroundColor="@color/slivergray"
                    app:cardCornerRadius="5dp"
                    app:cardElevation="4dp"
                    app:cardUseCompatPadding="true">


                    <RelativeLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="vertical"
                        android:background="@color/White">
                        <RelativeLayout
                            android:id="@+id/header"
                            android:layout_width="match_parent"
                            android:layout_height="48dp"
                            android:background="@color/tabs1"
                            android:gravity="center">

                            <TextView
                                android:layout_width="match_parent"
                                android:layout_height="wrap_content"
                                android:gravity="center_horizontal"
                                android:layout_centerHorizontal="true"
                                android:textAllCaps="true"
                                android:paddingTop="10dp"
                                android:textStyle="bold"
                                android:text="@string/opportunity_details"
                                android:textAppearance="?android:attr/textAppearanceLarge"
                                android:textColor="@color/White"
                                android:textSize="16sp"/>
                            <Button
                                android:id="@+id/close"
                                style="@style/Base.Widget.AppCompat.Button.Borderless"
                                android:layout_width="36dp"
                                android:layout_height="wrap_content"
                                android:layout_alignParentEnd="true"
                                android:layout_alignParentTop="true"
                                android:drawableTint="@color/White"
                                android:drawableLeft="@drawable/ic_close_black_24dp"
                                android:textColor="@color/White"
                                android:textSize="12sp"
                                android:textStyle="bold" />

                        </RelativeLayout>
                <ScrollView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/header"
                    android:id="@+id/below">
                    <LinearLayout
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:orientation="vertical"
                        android:layout_below="@+id/below"
                        android:id="@+id/main"
                        >
                        <LinearLayout
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:orientation="horizontal"
                            android:id="@+id/sales_stages"
                            android:paddingBottom="10dp"
                            android:paddingTop="10dp"
                            android:weightSum="4"
                            android:layout_below="@+id/main">

                            <TextView
                                android:id="@+id/text_opp"
                                style="@style/Base.TextAppearance.AppCompat.Subhead"
                                android:layout_width="0dp"
                                android:layout_height="wrap_content"
                                android:layout_below="@+id/bill_district"
                                android:paddingLeft="16dp"
                                android:paddingRight="16dp"
                                android:textStyle="bold"
                                android:text="Sales Stage"
                                android:layout_weight="2"
                                android:textColor="@color/gray"
                                android:textSize="15sp"
                                />
                            <TextView
                                android:id="@+id/sales_stage"
                                style="@style/Base.TextAppearance.AppCompat.Subhead"
                                android:layout_width="0dp"
                                android:layout_height="wrap_content"
                                android:layout_below="@+id/text_opp"
                                android:layout_weight="2"
                                android:paddingRight="16dp"
                                android:textColor="@color/gray"
                                android:textSize="15sp"/>
                        </LinearLayout>


                        <LinearLayout
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:orientation="horizontal"
                            android:id="@+id/suject_ids"
                            android:paddingBottom="10dp"
                            android:layout_below="@+id/sales_stages"
                            android:weightSum="4"
                            android:paddingTop="10dp">



</LinearLayout>

    </FrameLayout>


</RelativeLayout>

java:

create_pdf.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Log.d("size"," "+linearLayout.getWidth() +"  "+linearLayout.getWidth());
                        bitmap = loadBitmapFromView(linearLayout, linearLayout.getWidth(), linearLayout.getHeight());
                        createPdf();
                    }
                });
private void createPdf(){
        WindowManager wm = (WindowManager) getActivity().getSystemService(Context.WINDOW_SERVICE);
       // Display display = wm.getDefaultDisplay();
        DisplayMetrics displaymetrics = new DisplayMetrics();
        getActivity().getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
        float hight = displaymetrics.heightPixels ;
        float width = displaymetrics.widthPixels ;

        int convertHighet = (int) hight, convertWidth = (int) width;

   //     Resources mResources = getResources();
        ///Bitmap bitmap = BitmapFactory.decodeResource(mResources, R.drawable.gen_logo);

        PdfDocument document = new PdfDocument();
        PdfDocument.PageInfo pageInfo = new PdfDocument.PageInfo.Builder(convertWidth, convertHighet, 1).create();
        PdfDocument.Page page = document.startPage(pageInfo);

        Canvas canvas = page.getCanvas();



        Paint paint = new Paint();
        canvas.drawPaint(paint);

      //  bitmap = Bitmap.createScaledBitmap(bitmap, convertWidth, convertHighet, true);

        paint.setColor(Color.BLUE);
      //  canvas.drawBitmap(bitmap, 0, 0 , null);

        document.finishPage(page);

        // write the document content
        String targetPdf = "/sdcard/pdffromScroll.pdf";
        File filePath;
        filePath = new File(targetPdf);
        try {
            document.writeTo(new FileOutputStream(filePath));

        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(getContext(), "Something wrong: " + e.toString(), Toast.LENGTH_LONG).show();
        }
        // close the document
        document.close();
        Toast.makeText(getContext(), "PDF of Scroll is created!!!", Toast.LENGTH_SHORT).show();
        openGeneratedPDF();

    }

    private void openGeneratedPDF(){
        File file = new File("/sdcard/pdffromScroll.pdf");
        if (file.exists())
        {
            Intent intent=new Intent(Intent.ACTION_VIEW);
            Uri uri = Uri.fromFile(file);
            intent.setDataAndType(uri, "application/pdf");
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

            try
            {
                startActivity(intent);
            }
            catch(ActivityNotFoundException e)
            {
                Toast.makeText(getContext(), "No Application available to view pdf", Toast.LENGTH_LONG).show();
            }
        }
    }