从 recyclerview 获取搜索栏的位置？

Question

快速提问，因为我的另一个问题从未得到回答。我有一个 RecyclerView，每个项目 (CardView) 都填充了一个 SeekBar。我想知道获得此 SeekBar 位置的最佳方法。

换句话说，如果 recyclerview 中有两个项目，每个项目都包含自己的 SeekBar，我将如何区分第一个搜索栏和第二个搜索栏？

另外，如果这有帮助的话，SeekBar 的侦听器在我的适配器中。

请求代码示例：

class ViewHolder extends RecyclerView.ViewHolder {
    private TextView mName, mUsername, mPercent;
    private SeekBar mSeekBar;

    ViewHolder(View itemView) {
        super(itemView);
        mName = (TextView) itemView.findViewById(R.id.name_view_members);
        mUsername = (TextView) itemView.findViewById(R.id.username_view_members);
        mPercent = (TextView) itemView.findViewById(R.id.percent_text);
        mSeekBar = (SeekBar) itemView.findViewById(R.id.percent_seekbar);
    }
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
    GroupMembers individual = mMembers.get(position);
    holder.mName.setText(individual.getName());
    holder.mUsername.setText(individual.getUsername());

    //SeekBar Listener
    holder.mSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

            //Find out which SeekBar triggered the event
            int which = whichIsIt(seekBar.getId(), progress);

            //Stored progress (where is it at)
            int storedProgress = mAllProgress.get(which);

            /**Two cases can occur: User goes left or right with the thumb.
             * If RIGHT, we must check how much he's allowed to go in that
             * direction (based on other seekbars), and stop him before it's
             * too late. If LEFT, free up the space to allow the other seekbars.
             **/
            if (progress > storedProgress) {
                //How much remains based on all seekbars.
                int remaining = remaining();
                //If progress 100%, don't let user move. (overextend)
                if (remaining == 0) {
                    seekBar.setProgress(storedProgress);
                } else {
                    //Progress available, check the availability of others,
                    //and let the user move as long as it's below 100% total.
                    if (storedProgress + remaining >= progress) {
                        mAllProgress.set(which, progress);
                    } else {
                        mAllProgress.set(which, storedProgress + remaining);
                    }
                }
            } else if (progress <= storedProgress) {
                mAllProgress.set(which, progress);
            }
        }

        private int whichIsIt(int id, int progress) {
            holder.mPercent.setText(" " + progress + "%");
            return R.id.percent_seekbar;
        }

        private int remaining() {
            int remaining = TOTAL_AMOUNT;
            for (int i = 0; i < mAllProgress.size(); i++) {
                remaining -= mAllProgress.get(i);
            }
            if (remaining >= 100) {
                remaining = 100;
            } else if (remaining <= 0) {
                remaining = 0;
            }
            return remaining;
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
        }
    });

方法 whichIsIt 应该确定 RecyclerView 中的哪个 SeekBar 被触发。

Answer 1

您可以为每个 seekBar 设置一个标签，其中包含适配器中的位置 seekBar.setTag(holderPosition);

所以在方法 onProgressChanged(SeekBar seekBar,...) 中你做 seekBar.getTag()。这样你就可以在正确的位置改变你的数据了。

P.S：如果 OnSeekBarChangeListener 对所有 seekBars 都相同，您可以用它创建一个私有字段。 ;)

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