Update ProgressBar in Adapter-CodePudding

I want to show a progressBar when upload files to server. I can get progress values according to written bytes of file. But I can not update the progress bar. The problem; progress bar is filled to max immediately.

xml:

    <ProgressBar
    android:id="@ id/progress_file_uploading"
    style="@style/Widget.AppCompat.ProgressBar.Horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:max="1" />

In adapter I used a higher order function to get viewHolder. So in this way I can access the progress bar outside of Adapter and use it.

    var holderCallback: ((RecyclerView.ViewHolder?) -> Unit) = { }
    override fun onBindViewHolder(holder: FileViewHolder, position: Int) {
    holder.bind(getItem(position))
    holderCallback(holder)
    }

In fragment, I have progress values and these values are correct when I debugged.

val countingRequestBody = CountingRequestBody(it) { bytesWritten, contentLength ->
                val progress = 1.0 * bytesWritten / contentLength
                println("Written: $progress")//0.17,0.35,...1.0 (correct values)
                fileAdapter.holderCallback = { holder ->
                    (holder as FileListAdapter.FileViewHolder).progressBar.progress = progress.toInt()
                }
            }

So I think there might be a problem with the code in fragment to update progressBar in adapter. I'm not sure this is right way.

The design I want to achieve:

CodePudding user response：

Your progress value is a number between 0 and 1. when you convert it to Int it returns 0 or 1. As you set the maximum value of the progress bar to 1 so progress bar is filled to max immediately. I think you should change the current value like this:

 val progress = 100 * (bytesWritten / contentLength)

and also set the max value of the progress bar to 100.

 android:max="100"

CodePudding user response：

Define android:max in xml as an integer, not value between 0 and 1. For example, if you set android:max to 100 and progressBar.progress to 25, then 1/4 of progress bar will be filled.