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查看關於此的所有帖子，並瞭解所有情況下人們解釋有關從適配器傳遞數據到帶有接口的片段，我使用它但我的問題是如何將數據從片段傳遞到適配器？以及如何傳遞這些數據的價值？如何在片段之間傳遞數據到適配器
這是我的適配器：
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);
}
}
}
這是我的接口：
public interface AdapterCallback {
void MethodCallbackgo();
void MethodCallbacknext();
void MethodCallbackprev();
}
，這是我的片段：
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;
}
}
想裏面go.setOnClickListener獲取編輯文本值適配器並將其傳遞給public void MethodCallbackgo() {中的片段，但沒有奏效。另一個問題是如何將狗片段內的變量值發送到適配器？
不清楚爲什麼他的適配器有回調。片段應該有下一個和上一個按鈕。所有適配器需要做的就是顯示數據 –
用於變量狗在片段中的更改值。和你的回答沒有回答我的問題 – erfan
這是一條評論。沒有答案。鼓勵不要在評論 –