【基础篇】DatePickerDialog日期控件的基本使用(二) ——分别获取年、月、日、时、分

项目步骤：

1.在Main.xml布局文件中定义对应的组件，Main.xml内容如下：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<!-- 日期控件布局 -->

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal" >

<EditText

android:id="@+id/showdate"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_weight="1" />

<Button

android:id="@+id/pickdate"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="选择日期" />

</LinearLayout>

<!-- 时间控件布局 -->

<LinearLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:orientation="horizontal" >

<EditText

android:id="@+id/showtime"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_weight="1" />

<Button

android:id="@+id/picktime"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="选择时间" />

</LinearLayout>

</LinearLayout>

2.在Activity中声明日期、时间控件，完成对其操作，Activity内容如下：

public class MainActivity extends Activity {

//声明变量，获取组件

private EditText showDate = null;

private Button pickDate = null;

private EditText showTime = null;

private Button pickTime = null;

//声明变量，用于对日期、时间控件的操作

private static final int SHOW_DATAPICK = 0;

private static final int DATE_DIALOG_ID = 1;

private static final int SHOW_TIMEPICK = 2;

private static final int TIME_DIALOG_ID = 3;

private int mYear;  private int mMonth;

private int mDay;  private int mHour;

private int mMinute;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

//设置布局文件

setContentView(R.layout.main);

// 初始化控件和UI视图

initializeViews();

//新建一个Calendar对象获取Calendar信息

final Calendar c = Calendar.getInstance();

//将年、月、日、时、分分别获取出来

mYear = c.get(Calendar.YEAR);

mMonth = c.get(Calendar.MONTH);

mDay = c.get(Calendar.DAY_OF_MONTH);

mHour = c.get(Calendar.HOUR_OF_DAY);

mMinute = c.get(Calendar.MINUTE);

//设置日期

setDateTime();

//设置时间

setTimeOfDay();

}

/**   * 初始化控件和UI视图   */

private void initializeViews() {

//根据id在布局文件中找到对应的组件

showDate = (EditText) findViewById(R.id.showdate);

pickDate = (Button) findViewById(R.id.pickdate);

showTime = (EditText) findViewById(R.id.showtime);

pickTime = (Button) findViewById(R.id.picktime);

//为pickDate设置监听器，点击显示日期控件

pickDate.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

//新建一个Message对象

Message msg = new Message();

if (pickDate.equals((Button) v)) {

msg.what = MainActivity.SHOW_DATAPICK;

}

//发出消息

MainActivity.this.dateandtimeHandler.sendMessage(msg);

}

});

//为pickTime设置监听器，点击显示时间控件

pickTime.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Message msg = new Message();

if (pickTime.equals((Button) v)) {

msg.what = MainActivity.SHOW_TIMEPICK;

}

//发出消息

MainActivity.this.dateandtimeHandler.sendMessage(msg);

}

});

}

/**   * 设置日期   */

private void setDateTime() {

final Calendar c = Calendar.getInstance();

mYear = c.get(Calendar.YEAR);

mMonth = c.get(Calendar.MONTH);

mDay = c.get(Calendar.DAY_OF_MONTH);

//更新日期

updateDateDisplay();

}

/**   * 更新日期显示   */

private void updateDateDisplay() {

showDate.setText(new StringBuilder().append(mYear).append("-")     .append((mMonth + 1) < 10 ? "0" + (mMonth + 1) : (mMonth + 1))     .append("-").append((mDay < 10) ? "0" + mDay : mDay));

}

/**   * 日期控件的事件   */

private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {

public void onDateSet(DatePicker view, int year, int monthOfYear,     int dayOfMonth) {

mYear = year;    mMonth = monthOfYear;    mDay = dayOfMonth;

//更新日期

updateDateDisplay();

}

};

/**   * 设置时间   */

private void setTimeOfDay() {

final Calendar c = Calendar.getInstance();

mHour = c.get(Calendar.HOUR_OF_DAY);

mMinute = c.get(Calendar.MINUTE);

//更新日期

updateTimeDisplay();

}

/**   * 更新时间显示   */

private void updateTimeDisplay() {

showTime.setText(new StringBuilder().append(mHour).append(":")     .append((mMinute < 10) ? "0" + mMinute : mMinute));

}

/**   * 时间控件事件   */

private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {

@Override

public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

mHour = hourOfDay;

mMinute = minute;

//更新时间

updateTimeDisplay();

}

};

/**   * 判断用户选择并作出响应   */

@Override

protected Dialog onCreateDialog(int id) {

switch (id) {

case DATE_DIALOG_ID:    return new DatePickerDialog(this, mDateSetListener, mYear, mMonth,      mDay);

case TIME_DIALOG_ID:    return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute,      true);

}   return null;

}

@Override

protected void onPrepareDialog(int id, Dialog dialog) {

switch (id) {

case DATE_DIALOG_ID:    ((DatePickerDialog) dialog).updateDate(mYear, mMonth, mDay);    break;

case TIME_DIALOG_ID:    ((TimePickerDialog) dialog).updateTime(mHour, mMinute);    break;

}

}

/**   * 处理日期和时间控件的Handler   */

Handler dateandtimeHandler = new Handler() {

@Override

public void handleMessage(Message msg) {

switch (msg.what) {

case MainActivity.SHOW_DATAPICK:

//显示日期控件

showDialog(DATE_DIALOG_ID);     break;

case MainActivity.SHOW_TIMEPICK:

//显示时间控件

showDialog(TIME_DIALOG_ID);     break;

}

}

};

}