Question

我以RelativeLayout为ScrollView作为根元素。在RecyclerView我有spinner和TextView。现在我从JSON获取数据，例如RollNumber和Marks。现在在TextView，我需要显示RollNumber，并且应在Spinner Marks中显示。我已经获得了ArrayList<Progress>中的数据，对于这种情况，代码应该是什么样的;

我是否必须重复RelativeLayout for for循环？

OnCreate

for (int i = 0; i < progress.size(); i++) {

progress_addmore_spinner.setOnItemSelectedListener(new 

AdapterView.OnItemSelectedListener() {
@Override

public void onItemSelected(AdapterView<?> parent, View view, int position, long id) 
{
parent.getItemAtPosition(position).toString();

}

@Override
public void onNothingSelected(AdapterView<?> parent) {
  }
});
}
loadspinner
}

private void loadSpinners()
{
    if (progress != null || progress.size() > 0) {
        ArrayList<String> progresscard = new ArrayList<>();
        for (int i = 0; i < progress.size(); i++) {
            progresscard.add(progress.get(i).toString());
        }

        ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,
                progresscard);

        // Drop down layout style - list view with radio button
        dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);


        progress_addmore_spinner.setAdapter(dataAdapter);


        if (progress.get(0).getMarks() != null && !progress.get(0).getMarks().isEmpty()) {
            product_addmore_spinner.setSelection(progresscard.indexOf(toppingtypelist.get(0).getMarks()));
        }

    }
}

Answer 1

您可以设置包含适配器的微调器，它是recyclerview适配器的onBindViewHolder中的默认值。同时将位置设置为适配器中微调器的标记，如：vh.view.setTag(position);

现在在活动或片段中实现OnItemSelectedListener并将其传递到recyclerview适配器。由于您已将微调器的位置设置为标记，因此可以轻松地在ArrayList中提取progress对象的索引。

new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            int index = (int) parent.getTag();

            parent.getItemAtPosition(position).toString();
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {
        }
    };

如何动态重复微调器？

1 个答案: