问题
I have a ListView within a Fragment that has a ContextMenu to edit and delete entries. The ContextMenu launches a Dialog on selection of the EDIT option. I'd like to set the EditText's of that Dialog to the String values of the item selected via onItemLongClick on the ListView, but have been unable to do so. Thanks in advance.
Fragment:
public static class FragmentS extends Fragment {
private ListView saveListView;
private List<LiftSave> LiftSaves = new ArrayList<LiftSave>();
private static final int EDIT = 0, DELETE = 1;
LiftSave longClickedItemLiftSave;
DatabaseHandler dbHandler;
ArrayAdapter<LiftSave> saveAdapter;
public FragmentS() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.listview_s,
container, false);
saveListView = (ListView) rootView.findViewById(R.id.saveListView);
registerForContextMenu(saveListView);
DatabaseHandler dbHandler;
dbHandler = new DatabaseHandler (getActivity().getApplicationContext());
if (dbHandler.getLiftSavesCount() != 0)
LiftSaves.clear();
LiftSaves.addAll(dbHandler.getAllLiftSaves());
populateList();
saveListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
longClickedItemLiftSave = LiftSaves.get(position);
return false;
}
});
return rootView;
}
private void populateList() {
saveAdapter = new SaveListAdapter();
saveListView.setAdapter(saveAdapter);
}
public class SaveListAdapter extends ArrayAdapter<LiftSave> {
public SaveListAdapter() {
super(getActivity(), R.layout.listview_item, LiftSaves);
}
@Override
public View getView(int position, View view, ViewGroup parent) {
if (view == null)
view = getActivity().getLayoutInflater().inflate(R.layout.listview_item, parent, false);
LiftSave currentLiftSave = LiftSaves.get(position);
TextView liftName = (TextView) view.findViewById(R.id.liftName);
liftName.setText(currentLiftSave.getLiftName());
TextView maxValue = (TextView) view.findViewById(R.id.maxValue);
maxValue.setText(currentLiftSave.getMaxValue());
TextView liftNotes = (TextView) view.findViewById(R.id.liftNotes);
liftNotes.setText(currentLiftSave.getLiftNotes());
TextView weightAndReps = (TextView) view.findViewById(R.id.weightAndReps);
weightAndReps.setText(currentLiftSave.getRepsAndWeight());
TextView date = (TextView) view.findViewById(R.id.todayDate);
date.setText(currentLiftSave.getTodayDate());
return view;
}
}
public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, view, menuInfo);
menu.setHeaderIcon(R.drawable.pencil_icon);
menu.setHeaderTitle("Save Options");
menu.add(Menu.NONE, EDIT, menu.NONE, "Edit Save");
menu.add(Menu.NONE, DELETE, menu.NONE, "Delete Save");
}
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case EDIT:
final View dialogViewEdit = LayoutInflater.from(this.getActivity()).inflate(R.layout.edit_save, null, false);
final AlertDialog builderE = new AlertDialog.Builder(this.getActivity()).create();
TextView liftName = (TextView) getActivity().findViewById(R.id.liftName);
TextView maxValue = (TextView) getActivity().findViewById(R.id.maxValue);
TextView weightAndReps = (TextView) getActivity().findViewById(R.id.weightAndReps);
TextView liftNotes = (TextView) getActivity().findViewById(R.id.liftNotes);
TextView date = (TextView) getActivity().findViewById(R.id.todayDate);
EditText editName = (EditText) dialogViewEdit.findViewById(R.id.liftNameED);
editName.setText(liftName.getText().toString());
EditText editNotes = (EditText) dialogViewEdit.findViewById(R.id.liftNotesED);
editNotes.setText(liftNotes.getText().toString());
EditText editWR = (EditText) dialogViewEdit.findViewById(R.id.txtWRED);
editWR.setText(weightAndReps.getText().toString());
EditText editMax = (EditText) dialogViewEdit.findViewById(R.id.txtMaxED);
editMax.setText(maxValue.getText().toString());
EditText editDate = (EditText) dialogViewEdit.findViewById(R.id.txtDateED);
editDate.setText(date.getText().toString());
Button cancel =(Button) dialogViewEdit.findViewById(R.id.btnCancel);
Button save =(Button) dialogViewEdit.findViewById(R.id.btnSave);
cancel.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
builderE.dismiss();
}
});
save.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
EditText editName = (EditText) dialogViewEdit.findViewById(R.id.liftNameED);
EditText editNotes = (EditText) dialogViewEdit.findViewById(R.id.liftNotesED);
EditText editWR = (EditText) dialogViewEdit.findViewById(R.id.txtWRED);
EditText editMax = (EditText) dialogViewEdit.findViewById(R.id.txtMaxED);
EditText editDate = (EditText) dialogViewEdit.findViewById(R.id.txtDateED);
dbHandler = new DatabaseHandler(getActivity().getApplicationContext());
LiftSave liftSave = new LiftSave(longClickedItemLiftSave.getId() , String.valueOf(editName.getText()), String.valueOf(editMax.getText()), String.valueOf(editNotes.getText()), String.valueOf(editWR.getText()), String.valueOf(editDate.getText()));
dbHandler.updateLiftSave(liftSave);
LiftSaves.clear();
LiftSaves.addAll(dbHandler.getAllLiftSaves());
saveAdapter.notifyDataSetChanged();
}
});
builderE.setView(dialogViewEdit);
builderE.show();
break;
case DELETE:
AlertDialog.Builder builder = new AlertDialog.Builder(this.getActivity());
builder.setMessage("Are you sure you want to delete this save?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dbHandler = new DatabaseHandler(getActivity().getApplicationContext());
dbHandler.deleteLiftSave(longClickedItemLiftSave);
saveAdapter.remove(longClickedItemLiftSave);
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog dialogD = builder.create();
dialogD.show();
break;
}
return super.
onContextItemSelected(item);
}
}
回答1:
It seems that if longClickedItemLiftSave is getting populated correctly, you could change the code to this and it would fix it:
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case EDIT:
final View dialogViewEdit = LayoutInflater.from(this.getActivity()).inflate(R.layout.edit_save, null, false);
final AlertDialog builderE = new AlertDialog.Builder(this.getActivity()).create();
/* not needed
TextView liftName = (TextView) getActivity().findViewById(R.id.liftName);
TextView maxValue = (TextView) getActivity().findViewById(R.id.maxValue);
TextView weightAndReps = (TextView) getActivity().findViewById(R.id.weightAndReps);
TextView liftNotes = (TextView) getActivity().findViewById(R.id.liftNotes);
TextView date = (TextView) getActivity().findViewById(R.id.todayDate);
*/
//Use values from longClickedItemLiftSave
EditText editName = (EditText) dialogViewEdit.findViewById(R.id.liftNameED);
editName.setText(longClickedItemLiftSave.getLiftName());
EditText editNotes = (EditText) dialogViewEdit.findViewById(R.id.liftNotesED);
editNotes.setText(longClickedItemLiftSave.getLiftNotes());
EditText editWR = (EditText) dialogViewEdit.findViewById(R.id.txtWRED);
editWR.setText(longClickedItemLiftSave.getRepsAndWeight());
EditText editMax = (EditText) dialogViewEdit.findViewById(R.id.txtMaxED);
editMax.setText(longClickedItemLiftSave.getMaxValue());
EditText editDate = (EditText) dialogViewEdit.findViewById(R.id.txtDateED);
editDate.setText(longClickedItemLiftSave.getTodayDate());
来源：https://stackoverflow.com/questions/29585315/set-edittext-of-dialog-to-value-of-listview-item-onitemlongclick