我正在将Recycler View与Cardview一起使用，并使用Volley显示来自JSON的数据。当targetdkversion为26时，它可以在targetdkversion 19上正常工作，但在7个列表项之后不显示数据。
btnsend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
chatLayout.setVisibility(View.VISIBLE);
subject = etsub.getText().toString();
details = etdetail.getText().toString();
if (etsub.getText().toString().equals("")) {
Toast.makeText(getActivity(), "Enter subject", Toast.LENGTH_SHORT).show();
subj_layout.setError("Plese Enter Subject!");
}
else if (etdetail.getText().toString().equals("")) {
detail_layout.setError("Please Enter Details!");
}
else {
Log.d(TAG, "onClick:send ");
String url = "http://webapi.eduware.in/test/api/ParentsCommunication?StudentCurrentID=" + studentId.trim() + "&SchoolID=" + schoolid.trim() + "&CommunicationSubject=" + subject.trim() + "&CommunicationDetails=" + details.trim();
Log.d(TAG, "onClick: " + url);
Log.d(TAG, "fetchNotificationByVolley: url = " + url);
StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "onResponse: " + response);
try {
JSONObject jobj = new JSONObject(response);
String status = jobj.getString("status");
if (status.equals("1")) {
Toast.makeText(getActivity(), "Successfully added", Toast.LENGTH_SHORT).show();
getChatbyVolley();
txtnocomm.setVisibility(View.GONE);
} else {
Toast.makeText(getActivity(), "Data not added", Toast.LENGTH_SHORT).show();
chatLayout.setVisibility(View.VISIBLE);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d(TAG, "onErrorResponse: " + error.getMessage());
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
return null;
}
};
ApplicationController.getInstance().addToRequestQueue(stringRequest);
d.dismiss();
}
}
});
private void getChatbyVolley() {
chatLayout.setVisibility(View.VISIBLE);
String url = "http://webapi.eduware.in/test/api/ParentsCommunication?StudentCurrentID="+studentId.trim();
final ArrayList<Chat> arrayList = new ArrayList<>();
final ArrayList<String> array = new ArrayList<>();
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "onResponse: " + response);
try {
JSONObject jobj = new JSONObject(response);
String status = jobj.getString("status");
if(status.equals("1"))
{
JSONArray jsonArray = jobj.getJSONArray("data");
for(int i=0;i<jsonArray.length();i++)
{
JSONObject jsonObject = jsonArray.getJSONObject(i);
String date = jsonObject.getString("Date");
Log.d(TAG, "onResponse: "+date);
String[] separated = date.split("[T :]");
Log.d(TAG, "onResponse: splitted string0" + separated[0]);
Log.d(TAG, "onResponse: splitted string1" + separated[1]);
Log.d(TAG, "onResponse: splitted string2" + separated[2]);
Log.d(TAG, "onResponse: splitted string3" + separated[3]);
String time = separated[1] + ":" + separated[2];
Log.d(TAG, "onResponse: time is:::::::::::" + time);
DateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd");
DateFormat outputFormat = new SimpleDateFormat("dd MMM yyyy");
String inputDateStr=separated[0];
Date date1 = inputFormat.parse(inputDateStr);
String outputDateStr = outputFormat.format(date1);
String detail = jsonObject.getString("CommunicationDetails");
Log.d(TAG, "onResponse: details========="+detail);
String pid = jsonObject.getString("ParentID");
Log.d(TAG, "onResponse: pid is*********"+pid);
array.add(pid);
Log.d(TAG, "onResponse: pid is*********"+array);
editor.putString("parent_id",pid);
editor.putString("parentid_array",array.toString());
editor.commit();
Chat c = new Chat();
c.setCommsubject(jsonObject.getString("CommunicationSubject"));
c.setCommdetails(jsonObject.getString("CommunicationDetails"));
c.setDate(outputDateStr);
c.setParentid(pid);
arrayList.add(c);
progress.dismiss();
}
chatAdapter = new ChatAdapter(getActivity(), arrayList);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.setAdapter(chatAdapter);
recyclerView.setHasFixedSize(true);
chatAdapter.notifyDataSetChanged();
Log.d(TAG, "onResponse: " + arrayList.size());
progress.dismiss();
}
else
{
Toast.makeText(context, "No communication available", Toast.LENGTH_SHORT).show();
progress.dismiss();
rlnocomm.setVisibility(View.VISIBLE);
btnadd.setVisibility(View.VISIBLE);
}
} catch (JSONException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d(TAG, "onErrorResponse: " + error.getMessage());
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
return null;
}
};
ApplicationController.getInstance().addToRequestQueue(stringRequest);
}
答案 0 :(得分：0)
在您的代码中添加以下行。它对我有用
recyclerview.setHasFixedSize(true);
答案 1 :(得分：0)
使用此代码并根据您的要求更改参数和输入文本以及模型类
它对我有用...
public class YourActivity extends AppCompatActivity {
private RecyclerView recyclerview;
private RecyclerView.LayoutManager mLayoutManager;
private ProgressDialog pdialog;
RequestQueue requestQueue;
private MyCustomAdapter myCustomAdapter;
private ArrayList<DataFarmer> dataFarmers;
private ArrayList<Datum> datumArrayList;
public Datum datum;
NewInsuranceList newInsuranceList;
Context context;
BankInfo bankInfo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerview = (RecyclerView) findViewById(R.id.recycler_view_my_insurance);
context = this;
LinearLayoutManager layoutManager = new LinearLayoutManager(context);
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerview.setLayoutManager(layoutManager);
recyclerview.setHasFixedSize(true);
initToolbar();
doNormalPostOperation();
}
private void initToolbar() {
Toolbar toolbar = (Toolbar) findViewById(R.id.mtoolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}
public void doNormalPostOperation() {
requestQueue = Volley.newRequestQueue(context);
pdialog = new ProgressDialog(context);
pdialog.setMessage("Loading");
pdialog.show();
StringRequest stringRequest = new StringRequest(Request.Method.POST, "YOUR_URL",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pdialog.dismiss();
Log.e("login output", response);
NewInsuranceListAll newInsuranceListAll = new GsonBuilder().create().fromJson(response, NewInsuranceListAll.class);
datumArrayList = newInsuranceListAll.getDatumArrayList();
myCustomAdapter = new MyCustomAdapter(datumArrayList);
recyclerview.setAdapter(myCustomAdapter);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
pdialog.dismiss();
Toast.makeText(context, "Something went Wrong.. Please Try again..", Toast.LENGTH_SHORT).show();
}
}) {
@Override
protected Map<String, String> getParams() {
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", /*"1"*/PrefUtils.getUser(context).getData().get(0).getId());
map.put("type", "get_insurance_list");
Log.e("para", map + "");
return map;
}
};
requestQueue.add(stringRequest);
}
public class MyCustomAdapter extends RecyclerView.Adapter<MyCustomAdapter.MyViewHolder> {
private ArrayList<Datum> moviesList;
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView farmer_name, aadhar_card, insurance_id, tagging_date, txtRepost;
public ImageView farmer_image;
CircleImageView circleImageViewProfile;
ProgressBar simpleProgressBar;
public Button btnViewMore;
public MyViewHolder(View view) {
super(view);
farmer_name = view.findViewById(R.id.editText_farmer_name);
aadhar_card = view.findViewById(R.id.agent_adhar_number);
insurance_id = view.findViewById(R.id.insurance_id);
tagging_date = view.findViewById(R.id.editText_Tagging_Date);
circleImageViewProfile = view.findViewById(R.id.visit_profile_image);
btnViewMore = view.findViewById(R.id.btnViewMore);
}
}
public MyCustomAdapter(ArrayList<Datum> moviesList) {
this.moviesList = moviesList;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.layout_my_insurance, parent, false);
return new MyViewHolder(itemView);
}
public void clear() {
int size = this.moviesList.size();
if (size > 0) {
for (int i = 0; i < size; i++) {
this.moviesList.remove(0);
}
this.notifyItemRangeRemoved(0, size);
}
}
@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
final Datum datum = moviesList.get(position);
holder.farmer_name.setText(datum.getFarmerName() + " ");
holder.aadhar_card.setText(datum.getFarmerAdhaar() + " ");
holder.insurance_id.setText(datum.getInsuranceNumber() + " ");
holder.tagging_date.setText(datum.getTaggingDate() + " ");
Picasso.with(MyInsuranceActivity.this).load("URL" + datum.getFarmerPhoto() + "").placeholder(R.drawable.profile_image).into(holder.circleImageViewProfile);
holder.btnViewMore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent viewMoreIntent = new Intent(context, ViewAllDetailsActivity.class);
viewMoreIntent.putExtra("farmer_id", moviesList.get(position).getFarmerId() + "");
Log.e("parasdasdas", moviesList.get(position).getFarmerId() + "");
startActivity(viewMoreIntent);
}
});
}
@Override
public int getItemCount() {
return moviesList.size();
}
}
}