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。