ANDROID_MARS学习笔记_S02_002_Date\TimePicker

一、文档用法

1.xml

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.example.s02_e02_dateandtimepickerdialog.MainActivity" >

     <Button
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:text="pick_date"
     android:onClick="showDatePickerDialog" />

 </RelativeLayout>

2.java

 package com.example.s02_e02_dateandtimepickerdialog;

 import java.util.Calendar;

 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.DatePickerDialog;
 import android.app.Dialog;
 import android.app.DialogFragment;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.DatePicker;

 @SuppressLint("NewApi")
 public class MainActivity extends Activity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
     }

     public void showDatePickerDialog(View v) {
         DialogFragment newFragment = new DatePickerFragment();
         newFragment.show(getFragmentManager(), "datePicker");
     }

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

         @Override
         public Dialog onCreateDialog(Bundle savedInstanceState) {
             // Use the current date as the default date in the picker
             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);

             // 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) {
             // Do something with the date chosen by the user
         }
     }

 }

二、教程用法

1.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     >
 <TextView
     android:id="@+id/textViewId"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:text="@string/hello"
     />
 <Button
     android:id="@+id/showDatePickerButton"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:text="显示DatePicker"
     />

 </LinearLayout>

2.java

 package mars.dateandtime;

 import android.app.Activity;
 import android.app.DatePickerDialog;
 import android.app.Dialog;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.DatePicker;

 public class MainActivity extends Activity {
     /** Called when the activity is first created. */
     private Button showDatePickerButton = null;
     //该常量用于标识DatePickerDialog
     private static final int DATE_PICKER_ID = 1;
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         showDatePickerButton = (Button) findViewById(R.id.showDatePickerButton);
         showDatePickerButton.setOnClickListener(new ButtonListener());
     }

     private class ButtonListener implements OnClickListener {

         @Override
         public void onClick(View v) {
             //此方法用于显示DatePickerDialog
             showDialog(DATE_PICKER_ID);
         }

     }
     //监听器，用户监听用户点下DatePikerDialog的set按钮时，所设置的年月日
     DatePickerDialog.OnDateSetListener onDateSetListener = new DatePickerDialog.OnDateSetListener() {

         @Override
         public void onDateSet(DatePicker view, int year, int monthOfYear,
                 int dayOfMonth) {
             System.out.println(year + "-" + monthOfYear + "-" + dayOfMonth);
         }
     };

     @Override
     protected Dialog onCreateDialog(int id) {
         switch (id) {
         case DATE_PICKER_ID:
             return new DatePickerDialog(this, onDateSetListener, 2010, 11, 25);
         }
         return null;
     }

 }