Android的日期选择器

DialogFragment实现日期选择器

关于为什么使用DialogFragment而不是使用Dialog的实现，可以参考一下博客的关于DialogFragment的优点：

http://blog.csdn.net/lmj623565791/article/details/42628537

实现的效果图：

代码实现：

public class ChooseTimeDialog extends DialogFragment {
    private DatePicker date_picker;
    private TimePicker time_picker;
    private Button advance_order_btn;
    private Button come_order_btn;
    private View view;
    private String hour = "";
    private String minute = "";
    private Handler handler;
    public ChooseTimeDialog() {
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ContextThemeWrapper wrapper = new ContextThemeWrapper(getActivity(),android.R.style.Theme_Holo_Light_NoActionBar);
        inflater = inflater.cloneInContext(wrapper);
        view = inflater.inflate(R.layout.dialog_choose_time,container,false);
        getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
        date_picker = (DatePicker)view.findViewById(R.id.date_picker);
        time_picker = (TimePicker)view.findViewById(R.id.time_picker);
        advance_order_btn = (Button)view.findViewById(R.id.advance_order_btn);
        come_order_btn = (Button)view.findViewById(R.id.come_order_btn);
        Calendar cal = Calendar.getInstance();
        date_picker.init(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), null);
        time_picker.setIs24HourView(true);
        resizePicker(date_picker);
        resizePicker(time_picker);
        advance_order_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                setTime(date_picker,time_picker,1);
                ChooseTimeDialog.this.dismiss();
            }
        });
        come_order_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ChooseTimeDialog.this.dismiss();
            }
        });
        return view;
    }
    private void setTime(DatePicker datePicker, TimePicker timePicker, int tag) {
        String month = datePicker.getMonth() + 1 + "";
        String day = datePicker.getDayOfMonth() + "";
        hour = timePicker.getCurrentHour() + "";
        minute = timePicker.getCurrentMinute() + "";
        timePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
            public void onTimeChanged(TimePicker view, int hourOfDay, int minuteOfHour) {
                hour = hourOfDay + "";
                minute = minuteOfHour + "";
            }
        });

        if (month.length() == 1) {
            month = "0" + month;
        }
        if (day.length() == 1) {
            day = "0" + day;
        }
        if (hour.length() == 1) {
            hour = "0" + hour;
        }
        if (minute.length() == 1) {
            minute = "0" + minute;
        }

        String timeStr = "";
        timeStr = datePicker.getYear() + "-" + month + "-" + day + " " + hour+ ":" + minute+":"+"00";
        //Toast.makeText(GlobalContext.getInstance(), timeStr, Toast.LENGTH_LONG).show();
        Message message = Message.obtain();
        message.obj = timeStr;
        handler.sendMessage(message);
    }
    private void resizePicker(FrameLayout frame)
    {
        List<NumberPicker> list = findNumberPicker(frame);
        for(NumberPicker picker : list)
        {
            resizeNumberPicker(picker);
        }
    }

    private void resizeNumberPicker(NumberPicker picker)
    {
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
                LinearLayout.LayoutParams.WRAP_CONTENT);
        params.setMargins(10,0,10,0);
        picker.setLayoutParams(params);
    }

    private List<NumberPicker> findNumberPicker(ViewGroup viewGroup){
        List<NumberPicker> npList = new ArrayList<NumberPicker>();
        View child = null;
        if(null != viewGroup){
            for(int i = 0; i < viewGroup.getChildCount(); i++){
                child = viewGroup.getChildAt(i);
                if(child instanceof NumberPicker){
                    npList.add((NumberPicker)child);
                }
                else if(child instanceof LinearLayout){
                    List<NumberPicker> result = findNumberPicker((ViewGroup)child);
                    if(result.size()>0){
                        return result;
                    }
                }
            }
        }
        return npList;
    }

    public void setHandler(Handler handler)
    {
        this.handler = handler;
    }
}

实现这样效果的关键地方是需要设置一下主题:
ContextThemeWrapper wrapper = new ContextThemeWrapper(getActivity(),android.R.style.Theme_Holo_Light_NoActionBar);通过这段代码就可以实现主题的设置。如果时间选择器是一个Activity则可以通过在mainfest里面配置一下就可以：
布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/item_lay" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/color_white" android:orientation="vertical" >

    <TextView  android:id="@+id/title_txt" android:layout_width="match_parent" android:layout_height="50dp" android:layout_gravity="top" android:background="@color/txt_red" android:gravity="center" android:paddingLeft="10dp" android:paddingRight="10dp" android:text="@string/choose_time" android:textColor="@color/color_white" android:textSize="@dimen/txt_size" />

    <LinearLayout  android:id="@+id/view_stub_lay" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_gravity="center" >
        <DatePicker  android:id = "@+id/date_picker" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:calendarViewShown="false" style="@android:style/Theme.Holo.Light.NoActionBar" />
        <TimePicker  android:layout_width="wrap_content" android:layout_height="wrap_content" android:id = "@+id/time_picker" style="@android:style/Theme.Holo.Light.NoActionBar" />
    </LinearLayout>

    <!--两个按钮-->
    <LinearLayout  android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:background="@color/txt_black" android:orientation="horizontal" android:gravity="right|center_horizontal" >

        <Button  android:id="@+id/come_order_btn" style="@style/button_style" android:background="@drawable/button_rect_dark_selector" android:text="@string/cancel" android:layout_gravity="center_vertical"/>

        <Button  android:id="@+id/advance_order_btn" style="@style/button_style" android:background="@drawable/red_selector" android:text="@string/sure" android:layout_gravity="center_vertical"/>
    </LinearLayout>

</LinearLayout>

注意：1.本人是通过Handler实现数据的传递。
2.在小米手机上，如果多次单击某个控件弹出时间选择器，会出现异常信息，具体的解决方法是，每次需要弹出时间选择器是，都从新的new一遍对象。