Android SeekBar对讲，说话太多 [英] Android SeekBar talkback, talking too much

问题描述

（Android）在音乐播放器上，您可以按预期的方式更新搜索栏：

(Android) On a music player, you update the seekbar as expected with this:

PRECISION_SEEKBAR = 100000;
((SeekBar) findViewById(R.id.seekBar2)).setMax(PRECISION_SEEKBAR);

timerSeekBarUpdate.scheduleAtFixedRate(new TimerTask() {
        @Override
        public void run() {
            runOnUiThread(new Runnable() {
                final SeekBar seekBar = (SeekBar) findViewById(R.id.seekBar);

                @Override
                public void run() {
                    if (control == null || player == null) {
                        cancel();
                        return;
                    }
                    seekBar.setProgress((int) (player.getCurrentPosition() * PRECISION_SEEKBAR / player.getDuration()));
                    ...

但是，如果焦点在搜寻栏上，则对讲稳定且不间断提供进度反馈，例如寻求控制25％，寻求控制25％，寻求控制25％，寻求控制26％，寻求控制26％，寻求控制27％

However, if the focus is on the seek bar, talkback steadily and nonstop gives feedback for the progress. Like "seek control 25%", "seek control 25%", "seek control 25%", "seek control 26%", "seek control 26%", "seek control 27%"

我遗漏了某事，但无法解决问题。 @null以外的contentDescription。

I'm missing sth but couldnot solve the problem. I have set the contentDescription to other than @null. But then it reads the content description this time without stopping.

在Spotify客户端上，我检查了一下，它仅将进度读取为 xx％。

On Spotify client, I checked, it reads the progress as "xx percent" just once. Despite saving the focus on the seekbar.

当我将精度编辑为1或100时，您会丢失搜索栏上的精度。歌曲中似乎有几个部分。您可以通过滑动搜索栏来玩一个或另一个。

When I edit the precision for 1 or 100, then you lose the precision on the seekbar. It looks like there are a few parts in the song. You either play one or another by swiping on the seekbar.

有人经历过这样的事情吗？我在Google文档，堆栈网络或其他地方找不到任何内容。

Has anybody experienced sth like this? I couldn't find anything on google docs, stack network or somewhere else.

推荐答案

我遇到了问题，发现SeekBar读取了

I had the problem and found that SeekBar reads the percentage on every update.

这很有帮助，我只在百分比变化时才更新SeekBar，但仍然保持较高的精度（以我的情况为单位）。

It helped, that I update the SeekBar only when the percentage changes but still keep a high precision (in my case in ms).

@Override
public void updateSeekBar(final int currentPosInMillis, final int durationInMillis) {
    long progressPercent = calculatePercent(currentPosInMillis, durationInMillis);

    if (progressPercent != previousProgressPercent) {
        seekBar.setMax(durationInMillis);
        seekBar.setProgress(currentPosInMillis);
    }
    previousProgressPercent = progressPercent;
}

private int calculatePercent(int currentPosInMillis, int durationInMillis) {
    if(durationInMillis == 0) {
        return 0;
    }
    return (int) (((float)currentPosInMillis / durationInMillis) * 100);
} 

previousProgressPercent 已初始化到-1。

请注意，此解决方案与Spotify的解决方案不同。

Spotify会在系统提示时覆盖系统宣布的消息。 SeekBar被选中。

这具有以下2种效果：

Please note that this solution is not the same as Spotify does it.
Spotify overrides the message announced by the system when the SeekBar gets selected.
This has following 2 effects:

• 可以根据需要进行多次更新，而无需重复蜂鸣百分比


• 当选择SeekBar时百分比发生变化时，则什么都不会宣布

第二点可能是我的缺点，具体取决于您要实现的目标。

Point 2 might me a drawback depending on what you want to achieve.

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