Android中同时选择日期和时间

最近在做一个项目，要求选择时间的控件是同时选择日期和小时和分钟，但是android中系统只有单独的日期DatePicker和TimePicker，所以就要自己写来组合一下。

首先是布局文件:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:focusable="true"    android:focusableInTouchMode="true"    android:orientation="vertical" >    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="vertical" >        <DatePicker            android:id="@+id/DatePicker"            android:layout_width="fill_parent"            android:layout_height="wrap_content" />        <TimePicker            android:id="@+id/TimePicker"            android:layout_width="fill_parent"            android:layout_height="wrap_content" />    </LinearLayout></LinearLayout>

布局文件很简单，把焦点设给父亲布局是为了不要一点开这个控件就弹出键盘。

代码如下：

package cn.com.egova.mobileinspector.community.view;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Locale;import cn.com.egova.mobileinspector.R;import cn.com.egova.mobileinspector.constance.Format;import android.app.Activity;import android.app.AlertDialog;import android.app.DatePickerDialog;import android.app.DatePickerDialog.OnDateSetListener;import android.app.TimePickerDialog;import android.app.TimePickerDialog.OnTimeSetListener;import android.content.Context;import android.content.DialogInterface;import android.graphics.Color;import android.util.AttributeSet;import android.util.Log;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.widget.Button;import android.widget.DatePicker;import android.widget.DatePicker.OnDateChangedListener;import android.widget.LinearLayout;import android.widget.TimePicker;import android.widget.TimePicker.OnTimeChangedListener;import android.widget.Toast;public class DateTimeButton extends Button {public Calendar time = Calendar.getInstance(Locale.CHINA);public static final SimpleDateFormat format = new SimpleDateFormat(Format.DATA_FORMAT_YMDHMS_EN.toString());private DatePicker datePicker;private TimePicker timePicker;private Button dataView;private AlertDialog dialog;//private Activity activity;public DateTimeButton(Context context, AttributeSet attrs) {super(context, attrs);init();}public DateTimeButton(Context context) {super(context);init();}//增加构造器public DateTimeButton(Context context,Button dataView){super(context);this.dataView = dataView;}public AlertDialog dateTimePickerDialog(){LinearLayout dateTimeLayout = (LinearLayout)LayoutInflater.from(getContext()).inflate(R.layout.date_time_picker, null);datePicker = (DatePicker) dateTimeLayout.findViewById(R.id.DatePicker);timePicker = (TimePicker) dateTimeLayout.findViewById(R.id.TimePicker);if(dataView == null)init();timePicker.setIs24HourView(true);OnTimeChangedListener timeListener= new OnTimeChangedListener() {@Overridepublic void onTimeChanged(TimePicker view, int hourOfDay, int minute) {// TODO Auto-generated method stubtime.set(Calendar.HOUR_OF_DAY, hourOfDay);time.set(Calendar.MINUTE, minute);}};timePicker.setOnTimeChangedListener(timeListener);OnDateChangedListener dateListener = new OnDateChangedListener() {@Overridepublic void onDateChanged(DatePicker view, int year, int monthOfYear,int dayOfMonth) {// TODO Auto-generated method stubtime.set(Calendar.YEAR, year);time.set(Calendar.MONTH, monthOfYear);time.set(Calendar.DAY_OF_MONTH, dayOfMonth);}};datePicker.init(time.get(Calendar.YEAR), time.get(Calendar.MONTH), time.get(Calendar.DAY_OF_MONTH), dateListener);timePicker.setCurrentHour(time.get(Calendar.HOUR_OF_DAY));timePicker.setCurrentMinute(time.get(Calendar.MINUTE));dialog = new AlertDialog.Builder(getContext()).setTitle("设置日期时间").setView(dateTimeLayout).setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubtime.set(Calendar.YEAR, datePicker.getYear());time.set(Calendar.MONTH, datePicker.getMonth());time.set(Calendar.DAY_OF_MONTH, datePicker.getDayOfMonth());time.set(Calendar.HOUR_OF_DAY, timePicker.getCurrentHour());time.set(Calendar.MINUTE, timePicker.getCurrentMinute());updateLabel();}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub}}).show();return dialog;}/** *  */private void init() {this.setBackgroundResource(R.drawable.datebutton_bg);this.setGravity(Gravity.LEFT);this.setTextColor(Color.BLACK);this.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 生成一个DatePickerDialog对象，并显示。显示的DatePickerDialog控件可以选择年月日，并设置dateTimePickerDialog();}});updateLabel();}/** * 更新标签 */public void updateLabel() {if(dataView != null){dataView.setText(format.format(time.getTime()));}this.setText(format.format(time.getTime()));}/** * @return 获得时间字符串"yyyy-MM-dd HH:mm:ss" */public String getDateString() {return format.format(time.getTime());}public void setDate(String datestr){try {time.setTime(format.parse(datestr));updateLabel();} catch (ParseException e) {e.printStackTrace();}}}

按理说这样就行了，我之前以为也是这样，因为为测试了，是OK的，但是只要你点击控件上的加减来修改日期或者时间，点击确定那么是可以修改和保存成功的，可是大家都知道，日期控件和时间控件里面的输入框是可以手动输入的，这样我才发现如果我手输，点击确定，时间没有进行修改，这可难住我了。

还好，我经过点击发现，在一个输入框中修改了数字之后直接点击确定，那么是没有响应timechangelisterner的或者datechangelisterner，都没有响应，但是输入之后，移到另外一个输入框，这个时候就响应了，同时时间也被修改了，所以我想到了，在输入完成后，点击确定的时候，将DatePicker和TimePicker的焦点清除不就行了。于是，请在代码的103行加入这两句：

datePicker.clearFocus();timePicker.clearFocus();

这样就搞定了，经过测试，没问题。

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