android - 如何将 ScrollView 中的所有内容转换为位图？

Question

我用下面的代码进行转换，但是好像只能获取显示屏幕上的内容，不能获取显示屏幕外的内容。

有没有办法让所有的内容都脱离滚动条？

Bitmap viewBitmap = Bitmap.createBitmap(mScrollView.getWidth(),mScrollView.getHeight(),Bitmap.Config.ARGB_8888);  
Canvas canvas = new Canvas(viewBitmap); 
mScrollView.draw(canvas);

Answer 1

我们可以使用下面显示的代码将 scrollView 的所有内容转换为位图图像

private void takeScreenShot() 
{
    View u = ((Activity) mContext).findViewById(R.id.scroll);

    HorizontalScrollView z = (HorizontalScrollView) ((Activity) mContext).findViewById(R.id.scroll);
    int totalHeight = z.getChildAt(0).getHeight();
    int totalWidth = z.getChildAt(0).getWidth();

    Bitmap b = getBitmapFromView(u,totalHeight,totalWidth);             

    //Save bitmap
    String extr = Environment.getExternalStorageDirectory()+"/Folder/";
    String fileName = "report.jpg";
    File myPath = new File(extr, fileName);
    FileOutputStream fos = null;
    try {
        fos = new FileOutputStream(myPath);
        b.compress(Bitmap.CompressFormat.JPEG, 100, fos);
        fos.flush();
        fos.close();
        MediaStore.Images.Media.insertImage(mContext.getContentResolver(), b, "Screen", "screen");
    }catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

public Bitmap getBitmapFromView(View view, int totalHeight, int totalWidth) {

    Bitmap returnedBitmap = Bitmap.createBitmap(totalWidth,totalHeight , Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(returnedBitmap);
    Drawable bgDrawable = view.getBackground();
    if (bgDrawable != null)
        bgDrawable.draw(canvas);
    else
        canvas.drawColor(Color.WHITE);
    view.draw(canvas);
    return returnedBitmap;
}