无法下载照片

Question

我写了一个程序从 url 下载照片... 但是我有一个问题... 下载了一些照片。而且没有问题。

但是有些图片下载不全:( 在我查看的文件管理器中它被打破你能帮忙吗？

我的代码是：

public class DownloadFileFromURL_img 扩展 AsyncTask {

    private viewHolderPost holderPOST;

    public DownloadFileFromURL_img(viewHolderPost holderPOST) {
        Log.d(TAG, "DownloadFileFromURL_img: ");
        this.holderPOST = holderPOST;

    }


    @Override
    protected void onPreExecute() {
        super.onPreExecute();

    }

    /**
     * Downloading file in background thread
     */
    @Override
    protected String doInBackground(String... f_url) {
        int count;
        try {

            File file = new File(Environment.getExternalStorageDirectory(), "98Diha/img");

            if (!file.exists()) {
                if (!file.mkdirs()) {

                    file.createNewFile();
                }
            }



            InputStream input = null;
            int response = -1;

            URL url = new URL(f_url[0]);
            URLConnection conection = url.openConnection();

            if (!(conection instanceof HttpURLConnection))
                throw new IOException("Not an HTTP connection");

            try{
                HttpURLConnection httpConn = (HttpURLConnection) conection;
                httpConn.setAllowUserInteraction(false);
                httpConn.setInstanceFollowRedirects(true);
                httpConn.setRequestMethod("GET");
                httpConn.connect();

                response = httpConn.getResponseCode();
                if (response == HttpURLConnection.HTTP_OK) {
                    input = httpConn.getInputStream();
                }
            }
            catch (Exception ex)
            {
                throw new IOException("Error connecting");
            }






            int lenghtOfFile = conection.getContentLength();



             input = new BufferedInputStream(url.openStream());


            String imgS[] = f_url[0].split("/");
            String name = imgS[imgS.length - 1];



            String path = Environment
                    .getExternalStorageDirectory().toString()
                    + "/98diha/img/" + name;


            File filePath = new File(path);

            if (!filePath.exists()) {

                OutputStream output = new FileOutputStream(path);

                byte data[] = new byte[1024];

                long total = 0;

                while ((count = input.read(data)) != -1) {
                    total += count;


                    publishProgress("" + (int) ((total * 100) / lenghtOfFile));


                    output.write(data, 0, count);
                }


                output.flush();


                output.close();
                input.close();

            } else {
                SSToast(context, "Exist!");

                holderPOST.dowload_img.setVisibility(View.GONE);
                holderPOST.setWallpaper.setVisibility(View.VISIBLE);
                holderPOST.setWallpaper.setText(context.getString(R.string.set_wp));


                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    holderPOST.setWallpaper.setTextColor(ContextCompat.getColor(context, R.color.Teal_400));
                } else {
                    holderPOST.setWallpaper.setTextColor(context.getResources().getColor(R.color.Teal_400));
                }
            }

        } catch (Exception e) {
            Log.e("Error: ", e.getMessage());
        }

        return null;
    }

    /**
     * Updating progress bar
     */
    protected void onProgressUpdate(String... progress) {

        holderPOST.dowload_img.setVisibility(View.GONE);
        holderPOST.setWallpaper.setVisibility(View.VISIBLE);
        holderPOST.setWallpaper.setText(context.getString(R.string.dowloading));


    }

    /**
     * After completing background task Dismiss the progress dialog
     **/
    @Override
    protected void onPostExecute(String file_url) {


        holderPOST.setWallpaper.setText(context.getString(R.string.set_wp));
        holderPOST.setWallpaper.setTextColor(context.getResources().getColor(R.color.Teal_400));

        Log.d(TAG, "onPostExecute: ");
    }

}

Answer 1

而不是使用 AsyncTask 从 URL 下载图像。您可以使用 Glide or Picasso to do it quickly just in one line. But if you don't want to use libraries than you could use DownloadManager to download it and save it in a file. You can check this tutorial 等库或网络上的其他教程来实现 DownloadManager。

无法下载照片

Trouble downloading photos

java

android

image

urlconnection

android-asynctask