Android 如何访问项目'；在MainActivity中的RecyclerVIew内的进度条

我在RecyclerView里面有10件物品。每个项目都有一个progressBar。如何从MainActivity访问progressBar。这是我的适配器类。当我单击项目的按钮以更改进度条时，我正在使用接口处理事件

public class MyHospitalAdapter extends RecyclerView.Adapter<MyHospitalAdapter.MyViewHolder> {
private List<Hospital> mHospitalList;
private Context context;

public onImageClickListener mCallBack;


public interface onImageClickListener {
    void clickOnImage(int id);

    void onTextViewOfPriceSelected(int id, int amountOfProduction, int price, int time, int multiplier);
}

// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class MyViewHolder extends RecyclerView.ViewHolder {
    // each data item is just a string in this case


    ImageView imageView;
    ProgressBar progressBar;
    TextView textViewOnProgressBar;
    Button price;
    TextView productionAmount;
    TextView nameHospital;


    public MyViewHolder(@NonNull View itemView, ImageView imageView, ProgressBar progressBar, TextView textViewOnProgressBar, Button price, TextView productionAmount, TextView nameHospital) {
        super(itemView);
        this.imageView = imageView;
        this.progressBar = progressBar;
        this.textViewOnProgressBar = textViewOnProgressBar;
        this.price = price;
        this.productionAmount = productionAmount;
        this.nameHospital = nameHospital;
    }


}

// Provide a suitable constructor (depends on the kind of dataset)
public MyHospitalAdapter(List<Hospital> mHospitalsList, Context context) {
    this.mHospitalList = mHospitalsList;
    this.context = context;
}

// Create new views (invoked by the layout manager)
@Override
public MyHospitalAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent,
                                                         int viewType) {

    OneBusinesBinding binding =
            DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()),
                    R.layout.one_busines, parent, false);

    MyViewHolder vh = new MyViewHolder(binding.constraintLayout, binding.imageBusiness, binding.progressBar, binding.textViewOnProgressbar, binding.price, binding.amountofProduction, binding.nameHospital);
    return vh;
}

// 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
    Hospital currentItem = mHospitalList.get(position);
    int price = currentItem.getPrice();
    int productionAmount = currentItem.getAmount();
    int time = currentItem.getAmount();
    int mMultiplier = currentItem.getMultiplier();


    holder.imageView.setImageResource(AndroidImageAssets.getPictures().get(position));
    holder.productionAmount.setText(context.getString(R.string.amount_of_production, productionAmount));

    holder.price.setText(context.getString(AssetsUpgradeStrings.getStrings_On_Button_Buy().get(position), convertNumberToString(price)));
    holder.progressBar.setProgressTintList(ColorStateList.valueOf(Color.GRAY));
    holder.nameHospital.setText(AssetsUpgradeStrings.getHospitalsNames().get(position));
    holder.textViewOnProgressBar.setText(context.getString(R.string.string_on_progressbar, position));


    holder.imageView.setOnClickListener((v) -> {

        mCallBack.clickOnImage(position);
    });

---

我传递项目的数据列表。

您可以通过界面方法传递progressbar：

public interface onImageClickListener {
    void clickOnImage(int id, ProgressBar myProgressBar);

    void onTextViewOfPriceSelected(int id, int amountOfProduction, int price, int time, int multiplier);
}

并在活动中的回调中使用它：

holder.imageView.setOnClickListener((v) -> {
        mCallBack.clickOnImage(position, holder.progressBar);
    });

或

您可以在适配器的构造函数中传递活动实例

...
private MainActivity context;
...
public MyHospitalAdapter(List<Hospital> mHospitalsList, MainActivity context) {
    this.mHospitalList = mHospitalsList;
    this.context = context;
}

---

是否要更改项目按钮单击时的进度条？我的项目有一个按钮、进度条和其他元素。当我单击此按钮时，进度条开始按时间更改，而您为什么要从“活动”访问进度条？进度将按时间更改。使用了大量的MainActivity逻辑。你认为这不是真的吗？非常感谢你的回答。没有界面我如何访问PeopgressBar。有时，当活动启动时，进度条必须按计时器启动。您想在哪里启动进度条？在活动中还是在适配器中？在Main activity中当在recyclerview中创建项目时，您只需立即调用callback to activity，无需任何按钮单击Yeah谢谢。我没有想过。谢谢，问题解决了。

...
private MainActivity context;
...
public MyHospitalAdapter(List<Hospital> mHospitalsList, MainActivity context) {
    this.mHospitalList = mHospitalsList;
    this.context = context;
}

 holder.imageView.setOnClickListener((v) -> {
        context.yourMethodHere(holder.progressBar)
    });