Question

    public class FragAdapter extends BaseAdapter implements View.OnClickListener {

    WeakReference<Context> downloadsWeakReference;
    List<DownloadRequest> downloadsPojos;
    Button pause, resume, cancel, open, remove;

    public FragAdapter(WeakReference<Context> downloadsWeakReference, List<DownloadRequest> downloadsPojos) {
        this.downloadsWeakReference = downloadsWeakReference;
        this.downloadsPojos = downloadsPojos;
    }

    @Override
    public int getCount() {
        if (downloadsPojos != null) {
            return downloadsPojos.size();
        } else {
            return 0;
        }
    }

    @Override
    public Object getItem(int i) {
        if (downloadsPojos != null) {
            return downloadsPojos.get(i);
        } else {
            return null;
        }
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        if (view == null) {
            view = LayoutInflater.from(downloadsWeakReference.get()).inflate(R.layout.download_list_item, viewGroup, false);
        }
        ProgressBar progressBar = view.findViewById(R.id.downloadProgressBar);
        TextView name = view.findViewById(R.id.name);
        TextView down_progress = view.findViewById(R.id.down_progress);
        TextView download_size = view.findViewById(R.id.download_size);
        TextView status = view.findViewById(R.id.status);
        cancel = view.findViewById(R.id.cancel);
        pause = view.findViewById(R.id.pause);
        resume = view.findViewById(R.id.resume);
        open = view.findViewById(R.id.open);
        remove = view.findViewById(R.id.remove);

        pause.setTag(i);
        resume.setTag(i);
        remove.setTag(i);
        cancel.setTag(i);

        DownloadRequest downloadRequest = downloadsPojos.get(i);

        progressBar.setMax((int) downloadRequest.getTotalBytes());
        progressBar.setProgress((int) downloadRequest.getDownloadedBytes());
        down_progress.setText(String.valueOf((int) downloadRequest.getDownloadedBytes() / 100));
        name.setText(downloadRequest.getFileName());
        download_size.setText(String.valueOf((int) downloadRequest.getTotalBytes() / 1000000));
        //status.setText(String.valueOf(PRDownloader.getStatus(downloadsPojo.getDownloadId())));
        cancel.setText(R.string.cancel);
        pause.setText(R.string.pause);
        resume.setText(R.string.resume);

        pause.setOnClickListener(this);
        resume.setOnClickListener(this);
        cancel.setOnClickListener(this);
        open.setOnClickListener(this);
        remove.setOnClickListener(this);

        return view;
    }

    public void updateResults(List<DownloadRequest> results) {
        downloadsPojos = results;
        notifyDataSetChanged();
    }

    public void hideView() {
        cancel.setVisibility(View.GONE);
        remove.setVisibility(View.VISIBLE);
        pause.setVisibility(View.GONE);
        resume.setVisibility(View.GONE);
        open.setVisibility(View.VISIBLE);
    }

    @Override
    public void onClick(View view) {

        switch (view.getId()) {
            case R.id.cancel:
                int cancelTag = (int) view.getTag();
                PRDownloader.cancel(Constant.downloadsPojoList.get(cancelTag).getDownloadId());
                for (int i = 0; i < Constant.downloadsPojoList.size(); i++) {
                    if (Constant.downloadsPojoList.get(i).getDownloadId() == Constant.downloadsPojoList.get(cancelTag).getDownloadId()) {
                        Log.e("constant", "constant");
                        Constant.downloadsPojoList.remove(i);
                    }
                }
                updateResults(Constant.downloadsPojoList);
                break;
            case R.id.pause:
                int pos = (int) view.getTag();
                PRDownloader.pause(Constant.downloadsPojoList.get(pos).getDownloadId());
                pause.setVisibility(View.GONE);
                resume.setVisibility(View.VISIBLE);
                break;
            case R.id.resume:
                int posi = (int) view.getTag();
                PRDownloader.resume(Constant.downloadsPojoList.get(posi).getDownloadId());
                Log.e("resume", String.valueOf(posi));
                pause.setVisibility(View.VISIBLE);
                resume.setVisibility(View.GONE);
                break;
            case R.id.open:
                //For showing downloads folder.
                Intent intent = new Intent(Intent.ACTION_VIEW);
                intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + File.separator + "sachin")), "*/*");
                downloadsWeakReference.get().startActivity(Intent.createChooser(intent, "Open Downloads using"));
                break;
            case R.id.remove:
                int removeTag = (int) view.getTag();
                for (int i = 0; i < Constant.downloadsPojoList.size(); i++) {
                    if (PRDownloader.getStatus(Constant.downloadsPojoList.get(i).getDownloadId()) == PRDownloader.getStatus(Constant.downloadsPojoList.get(removeTag).getDownloadId())) {
                        Constant.downloadsPojoList.remove(i);
                        Log.e("removed", "removed");
                    }
                }
                updateResults(Constant.downloadsPojoList);
                break;
            default:
        }
    }
}

在此列表中，每个列表项都有五个按钮PAUSE，RESUME，CANCEL，OPEN，REMOVE。其中两个按钮将一次显示，其他按钮可见性将消失。这是一个下载列表，显示哪个文件正在下载两个按钮，CANCEL和PAUSE，点击PAUSE按钮后，PAUSE可见性将变为GONE，RESUME可见性将变为VISIBLE，点击RESUME按钮后，RESUME的可见性变为GONE， PAUSE可见性变得可见。所以，问题是当我下载两个文件并单击第一个项目的暂停按钮时，恢复按钮将出现在第二个项目上而不是第一个项目上。它禁止我暂停第二次下载。

Answer 1

在DownloadRequest模型中引入布尔变量，如 isResume ， isPause 等。在模型中应用变量字段后，尝试在单击 PAUSE ， RESUME 等按钮时在条件下更改布尔值true / false，并确保执行 notifyDataSetChanged （）

这将解决您的问题。

如果您仍然遇到任何问题，请提供型号和活动代码。

创建第二个列表项后，第一个列表项内的按钮对第二个列表项

1 个答案: