截取视图的截图给出了黑色图像？

Question

我尝试以编程方式截取imageview的屏幕截图！当图像保存到文件夹时，它产生黑色图像！当我试图截取我的整个滚动视图的截图时，我能够截取屏幕截图。请帮忙：

我的代码是：

private void saveop(){
        RelativeLayout parent = (RelativeLayout) findViewById(R.id.opimagelayout);// which includes your view or buttons?
        Bitmap bitmap = Bitmap.createBitmap(384,
                100, Bitmap.Config.ARGB_8888);
        Canvas bitmapHolder = new Canvas(bitmap);
        parent.draw(bitmapHolder);
        try {
            final File f = savebitmaps(bitmap,"operator","");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


public static File savebitmaps(Bitmap bmp,String transno, String currentDateandTime) throws IOException {
        Bitmap out = BITMAP_RESIZER(bmp, 384,112);
        File folder = new File(Environment.getExternalStorageDirectory() + "/MobeeLoad");
        File file = new File(folder, transno+".jpg");
        FileOutputStream fOut;
        try {
            fOut = new FileOutputStream(file);
            out.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
            fOut.flush();
            fOut.close();
            bmp.recycle();
            out.recycle();
        } catch (Exception e) {

        }
        bmp.recycle();
        return file;
    }

布局xml：

<RelativeLayout
        android:id="@+id/opimagelayout"
        android:background="#ffffff"
        android:layout_width="match_parent"
        android:layout_below="@+id/date"
        android:layout_height="90dp">
            <ImageView
                android:id="@+id/opimage"
                android:layout_width="90dp"
                android:src="@drawable/check"
                android:layout_centerHorizontal="true"
                android:layout_height="90dp" />
    </RelativeLayout>