I am having this issue for some time now, when I retrieved data from a database using volley and then show it in a recycler view, if the items are 8 or less than 8 then it shows them without any problem, but if I retrieve more than 8 items from database then the activity closes/crashes and goes back to the main activity. I don't get any error in the run console in android studio. I am retrieving 3 things from database for a single item, 2 strings and an image. I don't think the error is in the php file which is used to get the data as that I have checked and it retrieves without any issue. I have searched android documentation of recycler view but couldn't find anything
NOTE: I am getting image as string and then converting to bitmap.
if there is anything else needed then I can provide them without any issue.
the code is below:
Method which is used to call the recycler view activity which has problems.
public void onViewAttendanceButtonClick(int position, String courseCode,
String courseName, String batchName) {
if (MainActivity.teacherData != null) {
seeAttendanceDetails(MainActivity.teacherData.getEmail(),courseCode,
batchName, courseName, getDateAndTime);
}
}
private void seeAttendanceDetails(final String email,final String
courseCode, final String batchName,final String courseName, final String
date) {
StringRequest stringRequest = new StringRequest(Request.Method.POST,
seeAttendanceDetails, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONArray jsonArray = new JSONArray(response);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject data = jsonArray.getJSONObject(i);
String fullName = data.getString("full_name");
String Email = data.getString("email");
String photo = data.getString("photo");
Toast.makeText(CoursesActivity.this, courseCode,
Toast.LENGTH_LONG).show();
Attendance attendance1 = new Attendance(fullName, Email, photo);
attendanceArrayList.add(attendance1);
}
if (!attendanceArrayList.isEmpty()) {
Intent intent = new Intent(CoursesActivity.this,
ShowAttendanceActivity.class);
Bundle bundle = new Bundle();
bundle.putString("attendanceCourseCode",
courseCode);
bundle.putString("attendanceCourseName",
courseName);
bundle.putString("attendanceBatchName", batchName);
bundle.putSerializable("attendanceList",
attendanceArrayList);
intent.putExtras(bundle);
startActivity(intent);
}
else if (RegistrationActivity.teacherData != null) {
//
seeAttendanceDetails(RegistrationActivity.teacherData.getEmail(),
batchName,courseName, getDateAndTime);
// Toast.makeText(CoursesActivity.this,"No Record
Found",Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(CoursesActivity.this,
error.getMessage().toString(), Toast.LENGTH_SHORT).show();
}
}) {
public Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("email", email);
params.put("batch", batchName);
params.put("date", date);
params.put("courseCode",courseCode);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
}
<br/>
The recycler view activity code
public class ShowAttendanceActivity extends AppCompatActivity implements
ShowAttendanceActivityAdapter.RemoveAttendanceClickListener {
private RecyclerView recyclerView;
private String courseCode,courseName,batchName;
private ArrayList<Attendance> attendanceArrayList = new ArrayList<>();
private TextView
textViewCourseCode,textViewCourseName,textViewBatchName;
private String deleteStudentAttendance =
"https://asuiot.umargulzar.com/Teacher%20API%2
0Files/deleteStudentattendance.php";
int success;
private String TAG_SUCCESS = "success";
private String TAG_MESSAGE = "message";
private String getDateAndTime;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_show_attendance);
recyclerView = findViewById(R.id.attendance_details_recyclerView);
textViewCourseCode = findViewById(R.id.SA_textView_course_code);
textViewCourseName = findViewById(R.id.SA_textView_course_name);
textViewBatchName = findViewById(R.id.SA_textView_Batch);
LinearLayoutManager layoutManager = new LinearLayoutManager(this, RecyclerView.VERTICAL,false);
recyclerView.setLayoutManager(layoutManager);
Calendar calendar = Calendar.getInstance();
// SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd-MMM-yyy hh:mm:ss a");
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyy-MM-dd");
String dateTime = simpleDateFormat.format(calendar.getTime());
this.getDateAndTime = dateTime;
courseCode = (String) getIntent().getStringExtra("attendanceCourseCode");
courseName = (String) getIntent().getStringExtra("attendanceCourseName");
batchName = (String) getIntent().getStringExtra("attendanceBatchName");
attendanceArrayList = (ArrayList<Attendance>) getIntent().getExtras().getSerializable("attendanceList");
textViewCourseCode.setText(courseCode);
textViewCourseName.setText(courseName);
textViewBatchName.setText(batchName);
recyclerView.setAdapter(new ShowAttendanceActivityAdapter(attendanceArrayList,this));
}
@Override
public void onRemoveAttendanceClick(int position,String email) {
// Toast.makeText(ShowAttendanceActivity.this,"The Email of Student:"+email,Toast.LENGTH_LONG).show();
if(MainActivity.teacherData !=null){
deleteStudentAttendance(email,getDateAndTime,courseCode);
}
}
private void deleteStudentAttendance(final String email, final String getDateAndTime,final String courseCode) {
StringRequest stringRequest = new StringRequest(Request.Method.POST, deleteStudentAttendance, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
success = jsonObject.getInt(TAG_SUCCESS);
if (success == 1) {
Toast.makeText(ShowAttendanceActivity.this, jsonObject.getString(TAG_MESSAGE)+" Plz refresh the page.", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(ShowAttendanceActivity.this, jsonObject.getString(TAG_MESSAGE), Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
public Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("Email", email);
params.put("Date",getDateAndTime);
params.put("CourseCode",courseCode);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
}
the recycler view activity adapter
public class ShowAttendanceActivityAdapter extends RecyclerView.Adapter<ShowAttendanceActivityAdapter.AttendanceView> {
private ArrayList<Attendance> attendanceData;
Bitmap bitmap;
private RemoveAttendanceClickListener removeAttendanceClickListener;
public ShowAttendanceActivityAdapter(ArrayList<Attendance> attendanceData,RemoveAttendanceClickListener removeAttendanceClickListener){
this.attendanceData = attendanceData;
this.removeAttendanceClickListener = removeAttendanceClickListener;
}
@NonNull
@Override
public AttendanceView onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.show_attendance_data,parent,false);
return new AttendanceView(view,removeAttendanceClickListener);
}
@Override
public void onBindViewHolder(@NonNull AttendanceView holder, int position) {
Attendance attendance = attendanceData.get(position);
holder.textViewName.setText(attendance.getStudentName());
// holder.textViewEmail.setText(attendance.getStudentEmail());
holder.textViewEmail.setText(attendance.getStudentEmail());
decodeStringToImage(attendance.getStudentPhoto());
holder.imageViewPhoto.setImageBitmap(bitmap);
}
@Override
public int getItemCount() {
return attendanceData.size();
}
public void decodeStringToImage(String photo) {
// Bitmap bitmap = photo.
byte[] bytes = Base64.decode(photo, Base64.DEFAULT);
bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
}
public class AttendanceView extends RecyclerView.ViewHolder implements View.OnClickListener{
TextView textViewName, textViewEmail;
ImageView imageViewPhoto;
Button buttonRemoveCourse;
RemoveAttendanceClickListener removeAttendanceClickListener;
public AttendanceView(@NonNull View itemView,RemoveAttendanceClickListener removeAttendanceClickListener) {
super(itemView);
textViewName = itemView.findViewById(R.id.textView_name);
textViewEmail = itemView.findViewById(R.id.textView_Email);
imageViewPhoto = itemView.findViewById(R.id.textView_SA_Photo);
this.removeAttendanceClickListener = removeAttendanceClickListener;
buttonRemoveCourse = itemView.findViewById(R.id.btn_remove_attendance);
buttonRemoveCourse.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btn_remove_attendance:
removeAttendanceClickListener.onRemoveAttendanceClick(getAdapterPosition(),textViewEmail.getText().toString());
break;
}
}
}
public interface RemoveAttendanceClickListener{
void onRemoveAttendanceClick(int position,String email);
}
}