9.Android之日期对话框DatePicker控件学习

设置日期对话框在手机经常用到，今天来学习下。

首先设置好布局文件：如图

xml对应代码

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     android:id="@+id/LinearLayout01"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
     android:orientation="vertical"
     xmlns:android="http://schemas.android.com/apk/res/android"> 

     <EditText
         android:id="@+id/edit1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:editable="false"/>

     <Button
         android:id="@+id/btnDate"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="日期对话框"/>
     <Button
         android:id="@+id/btnTime"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="时间对话框"/>

     <DigitalClock
         android:id="@+id/digitalClock1"
         android:gravity="center"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="DigitalClock" />

     <AnalogClock
         android:id="@+id/analogClock1"
         android:gravity="center"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />

 </LinearLayout>

注意：EditText里面android:editable="false"这句作用是让编辑框处于不可编辑状态

接下来我们修改下MainActivity.java代码，如下：

 package com.example.datepickerdialog;

 import java.util.Calendar;

 import android.app.Activity;
 import android.app.DatePickerDialog;
 import android.app.Dialog;
 import android.app.TimePickerDialog;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.Button;
 import android.widget.DatePicker;
 import android.widget.EditText;
 import android.widget.TimePicker;

 public class MainActivity extends Activity {

     private EditText m_edit = null;
     private Button m_btnDate = null;
     private Button m_btnTime = null;
     private final static int DIALOG_DATE = 0;
     private final static int DIALOG_TIME = 1;
     private Calendar c = null;

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

         m_edit = (EditText)findViewById(R.id.edit1);
         m_btnDate = (Button)findViewById(R.id.btnDate);
         m_btnTime = (Button)findViewById(R.id.btnTime);

         m_btnDate.setOnClickListener(new View.OnClickListener() {

             @Override
             public void onClick(View v) {
                  showDialog(DIALOG_DATE);
             }
         });

         m_btnTime.setOnClickListener(new View.OnClickListener() {

             @Override
             public void onClick(View v) {
                 showDialog(DIALOG_TIME);
             }
         });
     }

     protected Dialog onCreateDialog(int id){

         Dialog dialog = null;
         switch(id){

         case DIALOG_DATE:
             c = Calendar.getInstance();
              dialog = new DatePickerDialog(this,new DatePickerDialog.OnDateSetListener() {
                  public void onDateSet(DatePicker dp, int year,int month, int dayOfMonth) {
                      m_edit.setText("您选择了：" + year + "年" + (month+1) + "月" + dayOfMonth + "日");
                  }
              }, c.get(Calendar.YEAR), // 传入年份
              c.get(Calendar.MONTH), // 传入月份
              c.get(Calendar.DAY_OF_MONTH) // 传入天数
              );
             break;

         case DIALOG_TIME:
             c=Calendar.getInstance();
             dialog=new TimePickerDialog(this,new TimePickerDialog.OnTimeSetListener(){
                 public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                     m_edit.setText("您选择了："+hourOfDay+"时"+minute+"分");
                 }
             },
             c.get(Calendar.HOUR_OF_DAY),  //小时
             c.get(Calendar.MINUTE),       //分钟
             false
             );
             break;
         }
         return dialog;
     }

     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
         getMenuInflater().inflate(R.menu.main, menu);
         return true;
     }

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         // Handle action bar item clicks here. The action bar will
         // automatically handle clicks on the Home/Up button, so long
         // as you specify a parent activity in AndroidManifest.xml.
         int id = item.getItemId();
         if (id == R.id.action_settings) {
             return true;
         }
         return super.onOptionsItemSelected(item);
     }
 }

提示：在这里我犯了一个小错误,就是重写onCreateDialog函数时我错写成OnCreateDialog，结果运行程序，点击日期和时间对话框都没有效果显示，所以大家在写代码时要注意这些细节。

最后运行效果：