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我在使用bignerdranch's ExpandableRecyclerView时遇到了困难。我即将把它在一个片段上工作（请参阅图片1和2）。但是，当我选择不同布局的不同片段时，数据似乎停留在ExpandableRecyclerView中（请参阅图片3和4）。ExpandableRecyclerAdapter保留片段之间的数据
（我没有足够的代表处发表个人链接，这样的照片是在imgur album - 抱歉！）
这里是我的ExpandableRecyclerAdapter
public class myExpandRecylerAdapter extends ExpandableRecyclerAdapter<TitleParentViewHolder, TitleChildViewHolder> {
LayoutInflater mInflater;
assignment_class myAssignment;
myQueueTask myQueueTask;
Dialog dialog;
Calendar myCalendar;
DatePickerDialog.OnDateSetListener date;
boolean DoneFlag = false;
public myExpandRecylerAdapter(Context context, List<ParentObject> parentItemList) {
super(context, parentItemList);
mInflater = LayoutInflater.from(context);
}
@Override
public TitleParentViewHolder onCreateParentViewHolder(ViewGroup viewGroup) {
View view = mInflater.inflate(R.layout.list_parent, viewGroup, false);
return new TitleParentViewHolder(view);
}
@Override
public TitleChildViewHolder onCreateChildViewHolder(ViewGroup viewGroup) {
View view = mInflater.inflate(R.layout.list_child, viewGroup, false);
return new TitleChildViewHolder(view);
}
@Override
public void onBindParentViewHolder(TitleParentViewHolder titleParentViewHolder, int i, Object o) {
ParentViewClass title = (ParentViewClass) o;
titleParentViewHolder.tvParent.setText(title.getTitle());
}
@Override
public void onBindChildViewHolder(final TitleChildViewHolder titleChildViewHolder, int i, Object o) {
// o instanceof class can be used to determine the class type and template this adapter
if (o instanceof assignment_class) {
Log.d("instanceof","assignment_class");
myAssignment = (assignment_class) o;
titleChildViewHolder.tvTitle.setText(myAssignment.ass_name);
titleChildViewHolder.tvTime.setText(myAssignment.TimeLeft());
titleChildViewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final assignment_class ModifiedAssignment = myAssignment;
dialog = new Dialog(titleChildViewHolder.itemView.getContext());
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.assignment_dialog);
dialog.show();
Log.d("onClick", "Child: " + myAssignment.toString());
// Set the textView at the top to the ass_name to indicate which assignment is being modified
TextView Name = (TextView) dialog.findViewById(R.id.tvName);
Name.setText(myAssignment.ass_name);
Spinner DropDown = (Spinner) dialog.findViewById(R.id.spDropDown);
// Create an ArrayAdapter using the string array and a default spinner
ArrayAdapter<CharSequence> staticAdapter = ArrayAdapter.createFromResource(titleChildViewHolder.itemView.getContext(), R.array.class_list, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
staticAdapter
.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
DropDown.setAdapter(staticAdapter);
DropDown.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Log.v("item", (String) parent.getItemAtPosition(position));
myAssignment.class_id = position;
Log.d("Set", myAssignment.class_id.toString());
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
// Initialize for DatePicker
myCalendar = Calendar.getInstance();
// Adapter
date = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
// TODO Auto-generated method stub
myCalendar.set(Calendar.YEAR, year);
myCalendar.set(Calendar.MONTH, monthOfYear);
myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
//Set textview
String myFormat = "MM/dd/yyyy"; //In which you need put here
SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
((TextView) dialog.findViewById(R.id.tvDate)).setText(sdf.format(myCalendar.getTime()));
}
};
final TextView etDate = (TextView) dialog.findViewById(R.id.tvDate);
// Default to today
String myFormat = "MM/dd/yyyy"; //In which you need put here
SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
((TextView) dialog.findViewById(R.id.tvDate)).setText(sdf.format(myCalendar.getTime()));
// OnClick will open the dialogue for DatePicker
etDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new DatePickerDialog(dialog.getContext(), date, myCalendar
.get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),
myCalendar.get(Calendar.DAY_OF_MONTH)).show();
}
});
final TextView etTime = (TextView) dialog.findViewById(R.id.etTime);
//Default time
etTime.setText("00:00");
// OnClick will open the dialogue for TimePicker
etTime.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
TimePickerDialog mTimePicker;
mTimePicker = new TimePickerDialog(dialog.getContext(), new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
etTime.setText(selectedHour + ":" + selectedMinute);
}
}, Calendar.HOUR_OF_DAY, Calendar.MINUTE, false);
mTimePicker.setTitle("Select Time");
mTimePicker.show();
}
});
final Button Done = (Button) dialog.findViewById(R.id.bDone);
Done.setText("NOT DONE");
Done.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!DoneFlag) {
Done.setText("DONE");
DoneFlag = true;
} else {
Done.setText("NOT DONE");
DoneFlag = true;
}
}
});
Button Cancel = (Button) dialog.findViewById(R.id.bCancel);
Button Confirm = (Button) dialog.findViewById(R.id.bConfirm);
Confirm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ModifiedAssignment.ass_id = myAssignment.ass_id;
ModifiedAssignment.ass_name = ((TextView) dialog.findViewById(R.id.tvName)).getText();
ModifiedAssignment.class_id = 0; //TODO: This
// We have to convert etDate to Date
SimpleDateFormat parser_date = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
try {
ModifiedAssignment.due = parser_date.parse(etDate.toString() + " " + etTime + ":00");
} catch (ParseException e) {
e.printStackTrace();
}
ModifiedAssignment.date_assigned = myAssignment.date_assigned;
ModifiedAssignment.done = ((((Button) dialog.findViewById(R.id.bDone)).getText() == "DONE"));
ModifiedAssignment.weight = 99; //TODO: This aswell
myQueueItem item = null;
try {
item = new myQueueItem(new assignment_class(myAssignment, ModifiedAssignment));
} catch (JSONException e) {
e.printStackTrace();
}
item.setMode("EDIT");
myQueue.getInstance().addQueueItem(item);
}
});
Cancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dialog.cancel();
}
});
}
});
}
if (o instanceof myQueueTask) {
myQueueTask = (myQueueTask) o;
titleChildViewHolder.tvTitle.setText(myQueueTask.toString());
titleChildViewHolder.tvTime.setText("time");
}
}
}