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7.1.3 TimePicker結合案例詳解

TimePicker是Android的時間設置控件。TimePicker類的繼承圖如下：
java.lang.Object
   ↳android.view.View
     ↳android.view.ViewGroup
       ↳android.widget.FrameLayout
         ↳android.widget.TimePicker
android.widget.TimePicker繼承了android.widget.FrameLayout框架布局類。TimePicker例子如圖7-8所示，從左到右是小時、分鍾、上午和下午設置按鈕，改變小時、分鍾、上午和下午都會觸發OnTimeChanged事件。
 


圖7-8 TimePicker
請參考代碼清單7-8，完整代碼請參考chapter7_1工程中chapter7_TimePicker代碼部分。
【代碼清單7-8】
public class chapter7_TimePicker extends Activity {
private TextView mTimeDisplay;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.timepicker_layout);

TimePicker timePicker = (TimePicker) findViewById(R.id.timePicker);

timePicker.setCurrentHour(12);
timePicker.setCurrentMinute(15);

mTimeDisplay = (TextView) findViewById(R.id.timetextview);

timePicker
.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
@Override
public void onTimeChanged(TimePicker view, int hourOfDay,
int minute) {
mTimeDisplay.setText(String.valueOf(hourOfDay) + " : "
+ String.valueOf(minute));
}
});
}
}
timePicker.setCurrentHour()方法設置當前時間，timePicker.setCurrentMinute()方法設置當前分鍾。TimePicker.OnTimeChangedListener()是實現時間改變監聽接口。
TimePicker的布局文件請參考代碼清單7-9，完整代碼請參考chapter7_1工程中timepicker_layout.xml代碼部分（chapter7_1/res/layout/timepicker_layout.xml）。
【代碼清單7-9】
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text="@string/hello" />
<TimePicker android:
android:layout_width="wrap_content" android:layout_height="wrap_content">
</TimePicker>

<TextView android: android:layout_width="fill_parent"
android:layout_height="wrap_content" android:text="@string/hello" />
</LinearLayout>
                                                出自《Android開發案例驅動教程》第七章

最後更新：2017-04-02 06:51:48

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