java - 无法与 TTS 同步在 recyclerVIew 中显示 imageView

Question

我如何在 RecyclerView 中显示/隐藏 imageView，因为 TTS(文本到语音)逐一播放所有可用的列表项!

Activity 方法 -这个方法被称为 r with Loop(不工作，没有错误，但根本没有给出我预期的输出

    int position=0;
    public void convertTextToSpeech() {
        Multiples multiples1=items.get(position);
        for (Multiples item : items) {

            text = item.first + "  " + item.getSecond() + " Za " + item.getResult() + ".";
            tts.speak(text, TextToSpeech.QUEUE_ADD, null);
            boolean speakingEnd = tts.isSpeaking();

            if (speakingEnd) {
                Toast.makeText(getApplicationContext(), "Speaking...."+position, Toast.LENGTH_SHORT).show();
                multiples1.setImage_show(true);
                mAdapter.notifyItemChanged(position);
            } else {
                Toast.makeText(getApplicationContext(), "Done...."+position, Toast.LENGTH_SHORT).show();
            }
            position++;
        }
    }

完整代码如下，方便理解，

首先，我在 recyclerView 中显示了所有项目。之后，我在一个方法中调用显示的项目，该方法具有 for 循环以 TTS 播放每一行(列表项)。我现在面临的问题是 imageView 没有显示，因为 TTS 正在读取每个 recyclerView 项目。

预期输出是每当 TTS 为每个行项目 textView 播放时，imageView(#image1) 应该同时显示

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更新的尝试代码

DisplayActivityResultAdapter.java

    ......
    .......
    int position = 0;
    public void convertTextToSpeech() {
        Multiples multiples1=items.get(position);
        for (Multiples item : items) {
            text = item.first + "  " + item.getSecond() + " Za " + item.getResult() + ".";
            tts.speak(text, TextToSpeech.QUEUE_ADD, null);
            boolean speakingEnd = tts.isSpeaking();

            // Toast.makeText(getApplicationContext(), "Speaking...."+position, Toast.LENGTH_SHORT).show();
           // multiples1.setImage_show(true);
            //  mAdapter.notifyItemChanged(position);
           // Log.i("values","------------------------------------------Row value-"+item.getFirst()+" X "+item.getSecond()+", Position="+position);
             //------------------------
            MyAdapter m= (MyAdapter)  mAdapter;
            m.updateItem(item,position);
            position++;
        }
    }
}

我的适配器.java

    .....
    .....
    // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        // - get element from your dataset at this position
        // - replace the contents of the view with that element

        if (holder instanceof MyAdapter.MyViewHolder) {
            final MyAdapter.MyViewHolder view = (MyAdapter.MyViewHolder) holder;
            Multiples p = items.get(position);
            view.name.setText(p.first + " X " + p.getSecond() + "= "+p.getResult());

            if(position>0) {
                if (p.image_show) {
                    view.image1.setVisibility(View.VISIBLE);
                    view.image.setVisibility(View.INVISIBLE);
                } else {
                    view.image1.setVisibility(View.INVISIBLE);
                    view.image.setVisibility(View.VISIBLE);
                }
            }
        }
    }


    public void updateItem(Multiples newItem, int pos) {
        Log.i("values","-----In updateItem Log----Row value-"+newItem.getFirst()+" X "+newItem.getSecond()+", Position="+pos);
        items.set(pos, newItem); //update passed value in your adapter's data structure
        Log.e("msg","-----items.get(pos)------------->"+items.get(pos).getFirst()+" X " +items.get(pos).getSecond());

        notifyItemChanged(pos,newItem);
    }

    // Return the size of your dataset (invoked by the layout manager)
    @Override
    public int getItemCount() {
        return items.size();
    }
}

Answer 1

您的主要失败是缺少 TTS 监听器。没有它，您将不知道何时应该更新您的 RecyclerView。 监听器看起来像这样:

class MyListener extends UtteranceProgressListener {
        @Override
        public void onStart(String utteranceId) {
            int currentIndex = Integer.parseInt(utteranceId);
            mMainAdapter.setCurrentPosition(currentIndex);
            handler.post(new Runnable() {
                @Override
                public void run() {
                    mMainAdapter.notifyDataSetChanged();
                }
            });
        }

        @Override
        public void onDone(String utteranceId) {
            int currentIndex = Integer.parseInt(utteranceId);
            mMainAdapter.setCurrentPosition(-1);
            handler.post(new Runnable() {
                @Override
                public void run() {
                    mMainAdapter.notifyDataSetChanged();
                }
            });
            if (currentIndex < data.size() - 1) {
                playSound(currentIndex + 1);
            }
        }

        @Override
        public void onError(String utteranceId) {
        }
    }

我已经创建了一个测试项目来展示它是如何实现的。 Here你可以看到它是如何工作的。 Here是我的 github 存储库。