Android widget——Timeicker 学习笔记_timeicker获取当前小时-优快云博客

本文介绍了一个用于选择一天中时间的视图组件TimePicker，包括其基本功能和使用方法。通过示例展示了如何设置时间和监听时间变化，适用于24小时制或AM/PM模式。

TimePicker:

A view for selecting the time of day, in either 24 hour or AM/PM mode. The hour, each minute digit, and AM/PM (if applicable) can be conrolled by vertical spinners. The hour can be entered by keyboard input. Entering in two digit hours can be accomplished by hitting two digits within a timeout of about a second (e.g. '1' then '2' to select 12). The minutes can be entered by entering single digits. Under AM/PM mode, the user can hit 'a', 'A", 'p' or 'P' to pick. For a dialog using this view, see TimePickerDialog.

即，时间设定的view。可以手段输入时间，也可以通过点击“+”或“—”来设置时间。

重要方法：

TimePicker.onTimeChangedListener：TimePicker的内部类，用来监听时间发生变化时的方法。

setCurrentHour()：设置小时

setCurrentMinute()：设置分钟

getCurrentHour()：获取当前的小时

getCurrentMinute()：获取当前的分钟

示例：

date_widgets_example_2.xml

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <TimePicker android:id="@+id/timePicker" android:layout_height="wrap_content" android:layout_width="fill_parent"/> <TextView android:id="@+id/dateDisplay" android:layout_width="wrap_content" android:layout_height="wrap_content" android:paddingLeft="4dip" android:text="@string/date_widgets_example_dateDisplay_text"/> </LinearLayout>

DateWidget2.java

public class DateWidgets2 extends Activity { // where we display the selected date and time private TextView mTimeDisplay; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.date_widgets_example_2); TimePicker timePicker = (TimePicker) findViewById(R.id.timePicker); timePicker.setCurrentHour(12); timePicker.setCurrentMinute(15); mTimeDisplay = (TextView) findViewById(R.id.dateDisplay); updateDisplay(12, 15); timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() { public void onTimeChanged(TimePicker view, int hourOfDay, int minute) { updateDisplay(hourOfDay, minute); } }); } private void updateDisplay(int hourOfDay, int minute) { mTimeDisplay.setText( new StringBuilder() .append(pad(hourOfDay)).append(":") .append(pad(minute))); } /* * format the time for 00:00 */ private static String pad(int c) { if (c >= 10) return String.valueOf(c); else return "0" + String.valueOf(c); } }