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查看关于此的所有帖子，并了解所有情况下人们解释有关从适配器传递数据到带有接口的片段，我使用它但我的问题是如何将数据从片段传递到适配器？以及如何传递这些数据的价值？如何在片段之间传递数据到适配器
这是我的适配器：
public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {
private Context context;
List<jsonContent> jcontent;
private AdapterCallback callback;
private String etpass;
public DataAdapter(Context context, List<jsonContent> jcontent, AdapterCallback callback) {
this.context=context;
this.jcontent=jcontent;
this.callback=callback;
}
@Override
public DataAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view ;
if(i == R.layout.card_row) {
view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_row, viewGroup, false);
}else {
view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.button_card, viewGroup, false);
}
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(final ViewHolder viewHolder, final int i) {
if(i == jcontent.size()) {
viewHolder.buttonnext.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
jcontent.removeAll(jcontent);
callback.MethodCallbacknext();
}
});
viewHolder.buttonprev.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
jcontent.removeAll(jcontent);
callback.MethodCallbackprev();
}
});
viewHolder.go.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
etpass=String.valueOf(viewHolder.editText.getText());
maghalat f1 = new maghalat();
Bundle args1 = new Bundle();
args1.putString("sag",etpass);
f1.setArguments(args1);
callback.MethodCallbackgo();
}
});
viewHolder.cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
viewHolder.pages.setText(Integer.toString(jcontent.get(i - 1).pages));
}
else {
viewHolder.title.setText(jcontent.get(i).title);
viewHolder.title.setTypeface(viewHolder.title.getTypeface(), Typeface.BOLD);
Picasso.with(context).load(jcontent.get(i).imgurl).resize(300, 400).into(viewHolder.imageView);
}
}
@Override
public int getItemCount() {
return jcontent.size()+1;
}
@Override
public int getItemViewType(int position) {
return (position == jcontent.size()) ? R.layout.button_card : R.layout.card_row;
}
public class ViewHolder extends RecyclerView.ViewHolder{
private TextView title,pages,current;
private ImageView imageView;
private Button buttonnext,buttonprev,go;
private CardView cardView;
private EditText editText;
public ViewHolder(final View view) {
super(view);
title = (TextView)view.findViewById(R.id.post_title);
imageView=(ImageView)view.findViewById(R.id.img);
buttonnext =(Button)view.findViewById(R.id.next);
buttonprev=(Button)view.findViewById(R.id.prev);
go=(Button)view.findViewById(R.id.go);
editText=(EditText)view.findViewById(R.id.et_go_page);
cardView=(CardView)view.findViewById(R.id.cvv);
pages=(TextView)view.findViewById(R.id.number_pages);
current=(TextView)view.findViewById(R.id.current);
}
}
}
这是我的接口：
public interface AdapterCallback {
void MethodCallbackgo();
void MethodCallbacknext();
void MethodCallbackprev();
}
，这是我的片段：
public class maghalat extends Fragment {
private View myFragmentView;
private RecyclerView recyclerView;
private DataAdapter adapter;
private String TAG = MainActivity.class.getSimpleName();
private ProgressDialog pDialog;
List<jsonContent> listcontent=new ArrayList<>();
public int dog=1;
public String url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
myFragmentView = inflater.inflate(R.layout.maghalat, container, false);
if(isNetworkConnected()) {
asyncRun();
}else
{
Toast.makeText(getActivity().getApplicationContext(), "دستگاه شما به اینترنت متصل نیست!", Toast.LENGTH_LONG).show();
}
return myFragmentView;
}
public void asyncRun(){
new GetContacts().execute();
}
public class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(getActivity());
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(url);
Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
int id=jsonObj.getInt("pages");
JSONArray posts = jsonObj.getJSONArray("posts");
for (int i = 0; i < posts.length(); i++) {
JSONObject c = posts.getJSONObject(i);
jsonContent jsonContent=new jsonContent();
jsonContent.title=c.getString("title");
//img
JSONObject post_img=c.getJSONObject("thumbnail_images");
for (int j=0;j<post_img.length();j++)
{
JSONObject v=post_img.getJSONObject("mom-portfolio-two");
jsonContent.imgurl=v.getString("url");
}
jsonContent.pages=id;
listcontent.add(jsonContent);
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getActivity().getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG)
.show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
getActivity().runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getActivity().getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG)
.show();
}
});
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
pDialog.dismiss();
recyclerView=(RecyclerView)myFragmentView.findViewById(R.id.recycler_view);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
recyclerView.setLayoutManager(layoutManager);
adapter=new DataAdapter(getActivity(), listcontent, new AdapterCallback() {
@Override
public void MethodCallbackgo() {
String gg;
Bundle extras = getArguments();
gg = extras.getString("sag");
dog= Integer.parseInt(gg);
url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
new GetContacts().execute();
}
@Override
public void MethodCallbacknext() {
dog+=1;
url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
new GetContacts().execute();
}
@Override
public void MethodCallbackprev() {
if (dog!=1)
{
dog-=1;
url = "http://memaraneha.ir/category/%d9%85%d9%82%d8%a7%d9%84%d8%a7%d8%aa/page/"+String.valueOf(dog)+"/?json=get_posts";
new GetContacts().execute();
}else{
Toast.makeText(getActivity().getApplicationContext(),"این اولین صفحه است",Toast.LENGTH_SHORT).show();
}
}
});
recyclerView.setAdapter(adapter);
}
}
private boolean isNetworkConnected() {
ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo ni = cm.getActiveNetworkInfo();
if (ni == null) {
// There are no active networks.
return false;
} else
return true;
}
}
想里面go.setOnClickListener获取编辑文本值适配器并将其传递给public void MethodCallbackgo() {中的片段，但没有奏效。另一个问题是如何将狗片段内的变量值发送到适配器？
不清楚为什么他的适配器有回调。片段应该有下一个和上一个按钮。所有适配器需要做的就是显示数据 –
用于变量狗在片段中的更改值。和你的回答没有回答我的问题 – erfan
这是一条评论。没有答案。鼓励不要在评论 –