Question

下载文件时，我不会更新已下载文件的百分比，也不会在下载完成后对其进行更新...

使用的代码

 URL url = new URL(link);
                            URLConnection conexion = url.openConnection();
                            conexion.connect();

                            int lenghtOfFile = conexion.getContentLength();
                            Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);

                            InputStream input = new BufferedInputStream(url.openStream());
                            String saveFilePath = "/sdcard/" + tag + ".apk";

                            OutputStream output = new FileOutputStream(UserSetting.FILEROOT);

                            byte data[] = new byte[1024];

                            long total = 0;

                            while ((count = input.read(data)) != -1) {
                                total += count;
                                holder.click.setText((int) ((total * 100) / lenghtOfFile)+"");
                                System.out.println((int) ((total * 100) / lenghtOfFile)+"");
                                output.write(data, 0, count);
                            }

                            output.flush();
                            output.close();
                            input.close();
                            holder.click.setText("نصب");

                        } catch (Exception e) {
                        }

Answer 1

第一件事把百分比参数放到您的持有人中

  class MyHolder extends RecyclerView.ViewHolder{
 //....
      int percentage = 0;
//...
 }
//then assign the value to it in when downloading progress changed 


 holder.percentage  (int) ((total * 100) / lenghtOfFile);
// after that set the percentage  as click button text 

holder.click.setText(String.valueOf(percentage));
  // and do the same thing in the beginning of onBind method 
  // thus the percentage still updated and won't be lost on scrolling

注意：您的代码会给您带来问题，每次您滚动并查看显示的文件

最简单的修复方法是尝试缓存文件，这样您就不必每次都下载相同的数据

RecyclerView.Adapter不更新按钮文本

1 个答案: