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：