ListView to file

ListViewToFile.java

public Bitmap getWholeListViewItemsToBitmap(ListView listview) {
    ListAdapter adapter = listview.getAdapter();
    int itemCount = adapter.getCount();
    int allItemsHeight = 0;
    List<Bitmap> bitmaps = new ArrayList<>();

    for (int i = 0; i < itemCount; i++) {
        View childView = adapter.getView(i, null, listview);
        childView.measure(
                MeasureSpec.makeMeasureSpec(listview.getWidth(), MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)
        );
        childView.layout(0, 0, childView.getMeasuredWidth(), childView.getMeasuredHeight());
        childView.setDrawingCacheEnabled(true);
        childView.buildDrawingCache();
        bitmaps.add(childView.getDrawingCache());
        allItemsHeight += childView.getMeasuredHeight();
    }

    Bitmap bigBitmap = Bitmap.createBitmap(listview.getMeasuredWidth(), allItemsHeight, Bitmap.Config.ARGB_8888);
    Canvas bigCanvas = new Canvas(bigBitmap);

    Paint paint = new Paint();
    int height = 0;
    for (int i = 0; i < bitmaps.size(); i++) {
        Bitmap bmp = setBackground(bitmaps.get(i));
        bigCanvas.drawBitmap(bmp, 0, height, paint);
        height += bmp.getHeight();
        bmp.recycle();
    }

    try {
        FileOutputStream fileOutputStream = new FileOutputStream(
                new File(
                        new ContextWrapper(getApplicationContext()).getDir("imageDir", Context.MODE_PRIVATE),
                        "coso" + System.currentTimeMillis() + ".png"
                )
        );
        bigBitmap.compress(CompressFormat.PNG, 100, fileOutputStream);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    return bigBitmap;
}

private Bitmap setBackground(Bitmap bmp1) {
    Bitmap overlay = Bitmap.createBitmap(bmp1.getWidth(), bmp1.getHeight(), bmp1.getConfig());
    Bitmap background = Bitmap.createBitmap(bmp1.getWidth(), bmp1.getHeight(), bmp1.getConfig());
    new Canvas(background).drawColor(getUjetStyle().getPrimaryBackgroundColor());
    Canvas canvas = new Canvas(overlay);
    canvas.drawBitmap(background, new Matrix(), null);
    canvas.drawBitmap(bmp1, new Matrix(), null);
    return overlay;
}