Question

我想在RecyclerView中点击一行时返回上一个片段。那么如何在我的适配器中调用该函数呢？

 @Override
    public void onBindViewHolder(final CountryViewHolder holder, int position) {
        String country = countries.get(position);
        holder.tvCountrySelection.setText(country);
        holder.tvCountrySelection.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                holder.tvCountrySelection.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_tick_17, 0);
                //I want to run popBackStack() here and send String country to previous fragment.
            }
        });
    }

Answer 1

通过适配器构造函数传递活动上下文

来自片段
```
 new YourAdaptor(getActivity())
```
来自活动
```
new YourAdaptor(this)
```
处理适配器类中的上下文
```
globalinstance = passedContext;
```

使用该上下文，您可以在点击事件中弹出片段，如

((YourActivity)context).getSupportFragmentManager().popBackStackImmediate();

Answer 2

你可以查看这个： https://developer.android.com/training/basics/fragments/communicating.html#Deliver

或者这个： http://simpledeveloper.com/how-to-communicate-between-fragments-and-activities/

popBackStack（）并在Adapter中传递参数

2 个答案: