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