java - "cannot find symbol method setOnDismissListener(<anonymous OnDismissListener>)"

Question

所以，我尝试设置 OnDismissListener关于对话框的事情。

Datepicker dialog = new Datepicker(v);
dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
                    @Override
                    public void onDismiss(DialogInterface Dialog) {
                        mGoogleMap.clear();
                        setMap(mGoogleMap);
                    }

                });

但它说

"Cannot resolve method 'setOnDismissListener(anonymous android.content.DialogInterface.OnDismissListener)'"

Datepicker类(class)扩展DialogFragment ，所以它应该有 setOnDismissListener方法？

我已经导入了android.content.DialogInterface'. Is it confused on the由于某种原因 new DialogInterface.onDismissListener()`？

编辑:有人要求提供一些日期选择器代码。这是构造函数和其他东西。如果您还需要任何其他信息，请告诉我。

public class Datepicker extends DialogFragment implements DatePickerDialog.OnDateSetListener {
    EditText txtDate;
    String strdate;
    public Datepicker(View v){
        txtDate = (EditText)v;
    }
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar c = Calendar.getInstance();
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);
        int day = c.get(Calendar.DAY_OF_MONTH);
        SimpleDateFormat simpleformat = new SimpleDateFormat("MM/dd/yyyy");
        strdate = simpleformat.format(c.getTime());
        return new DatePickerDialog(getActivity(), this, year, month, day);
    }
}

Answer 1

您必须借助界面来解决此问题

public class Main3Activity extends AppCompatActivity implements DatePickerListener{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

.........

     //Initialise or create your dialog like this
      DatePicker dialog = new DatePicker(v,this);
}

@Override
    public void onDatePickerDismissed() {
         //Here You receive the dialog dissmiss listner
                        mGoogleMap.clear();
                        setMap(mGoogleMap);
    }
}

创建一个接口(interface)类，例如

public interface DatePickerListener {

    public void onDatePickerDismissed();
}

像这样更改对话框选择器

@SuppressLint("ValidFragment")
public class DatePicker extends DialogFragment implements DatePickerDialog.OnDateSetListener {
    EditText txtDate;
    String strdate;
    DatePickerListener datePickerListener;
    @SuppressLint("ValidFragment")
    public DatePicker(View v, DatePickerListener _datePickerListener){
        txtDate = (EditText)v;
        this.datePickerListener = _datePickerListener;
    }

    public DatePicker() {

    }

    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Calendar c = Calendar.getInstance();
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);
        int day = c.get(Calendar.DAY_OF_MONTH);
        SimpleDateFormat simpleformat = new SimpleDateFormat("MM/dd/yyyy");
        strdate = simpleformat.format(c.getTime());
        return new DatePickerDialog(getActivity(), this, year, month, day);
    }

    @Override
    public void onDateSet(android.widget.DatePicker datePicker, int i, int i1, int i2) {

    }

    @Override
    public void onDismiss(DialogInterface dialog) {
        datePickerListener.onDatePickerDismissed();
        super.onDismiss(dialog);
    }
}

希望对你有帮助:)