我对片段通信有点困惑。 Android说两个片段永远不应该直接通信，我不知道我的片段是否违反了这条规则。
基本上，我想要一个包含下拉微调器的Fragment，一个DatePickerDialog（一旦用户点击编辑文本就会弹出），以及一个TimePickerDialog（一旦用户点击编辑文本，它就会弹出）。
这是我到目前为止所做的，现在，当我点击编辑文本时，DatePickerDialog和TimePickerDialog将会出现，而且一切似乎都在起作用。
但我有点担心我试图让两个片段进行通信（在我的CommonSelectionFragment和DatePickerFragment之间）。我是否违反了碎片通信的规则？如果我这样做，你能告诉我什么是更好的方法来解决这个问题。非常感谢你提前。
public class CommonSelectionFragment extends Fragment implements
OnItemSelectedListener {
private Spinner spinner;
private EditText edtTime;
private EditText edtDate;
private static final Calendar c = Calendar.getInstance();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_common_selection,
container, false);
// populating the spinner with string array of time category
spinner = (Spinner) rootView.findViewById(R.id.spinner_time_category);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getActivity().getApplicationContext(), R.array.category_array,
R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(this);
edtTime = (EditText) rootView.findViewById(R.id.edt_time);
edtTime.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showTimePickerDialog(v);
}
});
edtDate = (EditText) rootView.findViewById(R.id.edt_enter_date);
edtDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showDatePickerDialog(v);
}
});
return rootView;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int pos,
long id) {
TextView myText = (TextView) view;
Toast.makeText(getActivity().getApplicationContext(),
"You Selected " + myText.getText(), Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// TODO Auto-generated method stub
}
public static class DatePickerFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener {
int year, month, day;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
// final Calendar c = Calendar.getInstance();
year = c.get(Calendar.YEAR);
month = c.get(Calendar.MONTH);
day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
public void onDateSet(DatePicker view, int year, int month, int day) {
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);
c.set(Calendar.DAY_OF_MONTH, day);
}
}
public void showDatePickerDialog(View v) {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getActivity().getSupportFragmentManager(),
"datePicker");
}
public static class TimePickerFragment extends DialogFragment implements
TimePickerDialog.OnTimeSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
//final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
}
}
public void showTimePickerDialog(View v) {
DialogFragment newFragment = new TimePickerFragment();
newFragment.show(getActivity().getSupportFragmentManager(),
"timePicker");
}
}