当我更改 recyclerview.adapter 的值时，我想将其值设置为 mainactivity 中的 textview，该怎么做？
it will be like this,
从我的 json 中检索回收数据，因此它将是随机的且数据很多， 当我更改或添加“总获胜”的值超过“0”时，底部的文本视图将出现，并且“总计”将从我添加的数据中计数，完成后，我想发送“结果” “对下一个活动或帖子的值并将其保存到 mysql 数据库，
这是我的 MainActivity 代码：
...
private List<Details> listDetails = new ArrayList<>();
private RecyclerAdapter viewAdapter;
@BindView(R.id.recyclerView)
RecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view);
ButterKnife.bind(this);
viewAdapter = new RecyclerAdapter(this, listDetails);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(viewAdapter);
getMyData();
}
...
private void getMyData() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(AppConfig.URL_MAIN)
.addConverterFactory(GsonConverterFactory.create())
.build();
...
});
...
我的 RecycleAdapter 代码：
...
private Context context;
private List<Details> listDetails;
public RecyclerAdapter(Context context, List<Details> listDetails) {
this.context = context;
this.listDetails = listDetails;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_view, parent, false);
ViewHolder holder = new ViewHolder(v);
return holder;
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
final Details getSet = listDetails.get(position);
holder.tvName.setText(getSet.getName());
holder.numberPickerTotalWin.setValueChangedListener(new ValueChangedListener() {
@Override
public void valueChanged(int value, ActionEnum action) {
Toast.makeText(context, position + value + " Clicked", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public int getItemCount() {
return listDetails.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
@BindView((R.id.nP))
NumberPicker numberPickerTotalWin;
@BindView(R.id.tvName)
TextView tvName;
public ViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
...
}
}
检查代码
YourActivity ... 实现 RecyclerViewItemClick
private List<Details> listDetails = new ArrayList<>();
private RecyclerAdapter viewAdapter;
@BindView(R.id.recyclerView)
RecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view);
ButterKnife.bind(this);
viewAdapter = new RecyclerAdapter(this, listDetails, this);
RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(viewAdapter);
getMyData();
}
...
private void getMyData() {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(AppConfig.URL_MAIN)
.addConverterFactory(GsonConverterFactory.create())
.build();
...
});
RecyclerView适配器
private RecyclerViewItemClick mListener;
public RecyclerAdapter(Context context, List<Details> listDetails, RecyclerViewItemClick listener) {
this.context = context;
this.listDetails = listDetails;
this.mListener = listener;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_view, parent, false);
ViewHolder holder = new ViewHolder(v, mListener);
return holder;
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
final Details getSet = listDetails.get(position);
holder.tvName.setText(getSet.getName());
holder.numberPickerTotalWin.setValueChangedListener(new ValueChangedListener() {
@Override
public void valueChanged(int value, ActionEnum action) {
Toast.makeText(context, position + value + " Clicked", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public int getItemCount() {
return listDetails.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
@BindView((R.id.nP))
NumberPicker numberPickerTotalWin;
@BindView(R.id.tvName)
TextView tvName;
public ViewHolder(View itemView) {
super(itemView);
ButterKnife.bind(this, itemView);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (mListener != null){
//you can access to the current position if you want -> getLayoutPosition()
mListener.yourMethod();
}
}
public interface RecyclerViewItemClick {
void yourMethod();
}
}