Question

我试图从片段内部调用日期时间片段。我将EditText作为参数传递给DatePickerFragment，这样一旦设置了日期，它就可以在UI中更新它。但是，我的应用程序在开始之前就会中止

DateTimeFragment：

package com.example.makemyday;

import java.util.Calendar;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageButton;

public class DateTimeFragment extends Fragment{

     private EditText editStartDate;
     private EditText editEndDate;
     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
       { 
         View v = inflater.inflate(R.layout.fragment_datetime, container, false);
         final Calendar calendar = Calendar.getInstance();

            int yy = calendar.get(Calendar.YEAR);
            int mm = calendar.get(Calendar.MONTH)+1;
            int dd = calendar.get(Calendar.DAY_OF_MONTH);

            ImageButton startDate=(ImageButton)v.findViewById(R.id.start_date_button);
            editStartDate = (EditText)v.findViewById(R.id.startDate);
            editStartDate.setText(Integer.toString(dd)+ "/" + Integer.toString(mm) +"/"+ Integer.toString(yy));

            ImageButton endDate=(ImageButton)v.findViewById(R.id.end_date_button);
            editEndDate = (EditText)v.findViewById(R.id.endDate);
            editEndDate.setText(Integer.toString(dd)+ "/" + Integer.toString(mm) +"/"+ Integer.toString(yy));


             startDate.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        // TODO Auto-generated method stub
                           try
                            {
                               DialogFragment newFragment= (DialogFragment) new DatePickerFragment(editStartDate);
                               newFragment.show(getActivity().getSupportFragmentManager(), "datePicker");
                            }

                            catch(Exception e)
                            {

                                return ;
                            }
                    }
                });

             endDate.setOnClickListener(new View.OnClickListener() {
             @Override
                public void onClick(View v) {
                            try
                            {
                                 DialogFragment newFragment= (DialogFragment) new DatePickerFragment(editEndDate);
                                 newFragment.show(getActivity().getSupportFragmentManager(), "datePicker");

                            }
                            catch(Exception e)
                            {
                                return ;
                            }
            }
        });

         return v;
      }


}

DatePickerFragment

package com.example.makemyday;
import java.util.Calendar;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageButton;

@SuppressLint("ValidFragment")
public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

        /*public static interface OnCompleteListener {
            public abstract void onComplete(String date, int id);
        }

        private OnCompleteListener mListener;
        */
        private EditText edit_text;

        public DatePickerFragment(EditText edit_text) {
            this.edit_text=edit_text;
                    //buttonID=id;
        }
        /*// make sure the Activity implemented it
        public void onAttach(Activity activity) {
            super.onAttach(activity);
            try {
                this.mListener = (OnCompleteListener)activity;
            }
            catch (final ClassCastException e) {
                throw new ClassCastException(activity.toString() + " must implement OnCompleteListener");
            }
        }*/

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Calendar calendar = Calendar.getInstance();
            int yy = calendar.get(Calendar.YEAR);
            int mm = calendar.get(Calendar.MONTH)+1;
            int dd = calendar.get(Calendar.DAY_OF_MONTH);
            return new DatePickerDialog(getActivity(), this, yy, mm, dd);
        }

        public void onDateSet(DatePicker view, int yy, int mm, int dd) {
             String date =Integer.toString(dd) + "/" + Integer.toString(mm)  + "/" + Integer.toString(yy);
             edit_text.setText(date);
              //this.mListener.onComplete(date,buttonID);

        }
}

我收到以下错误：

[2013-12-26 18:19:15 - MakeMyDay] ------------------------------
[2013-12-26 18:19:15 - MakeMyDay] Android Launch!
[2013-12-26 18:19:15 - MakeMyDay] adb is running normally.
[2013-12-26 18:19:15 - MakeMyDay] Performing com.example.makemyday.MainActivity activity launch
[2013-12-26 18:19:16 - MakeMyDay] Automatic Target Mode: launching new emulator with compatible AVD 'HappifyV2'
[2013-12-26 18:19:16 - MakeMyDay] Launching a new emulator with Virtual Device 'HappifyV2'
[2013-12-26 18:19:21 - Emulator] emulator: WARNING: Requested RAM size of 1907MB is too large for your environment, and is reduced to 1072MB.
[2013-12-26 18:19:21 - Emulator] Failed to allocate memory: 8
[2013-12-26 18:19:21 - Emulator] 
[2013-12-26 18:19:21 - Emulator] This application has requested the Runtime to terminate it in an unusual way.
[2013-12-26 18:19:21 - Emulator] Please contact the application's support team for more information.

为什么这段代码不起作用？

Answer 1

问题显然是由于RAM的大小，而不是因为DatePicker Fragment。您需要将模拟器RAM的大小减小到1GB（1024MB）并尝试再次运行。

Fragment中的DatePickerFragment不起作用

1 个答案: