android - TimePicker 不根据用户输入更新

Question

我有一个使用自定义日期时间选择器的应用程序。当用户选择一个时间并单击 SET 按钮时，它会在微调器上设置时间。我的应用会检查时间，如果它根据某些标准不合适，我会再次显示微调器。

问题是，当用户第二次或随后更改微调器上的时间时，初始时间仍然设置。如何从反射(reflect)在 dateTime 对象中的微调器获取时间？

我试过调用 TPic.getCurrentHour 等，也试过在 TPic 对象上调用 refreshDrawableState，但它仍然不起作用。有什么想法吗？

Button ShowDTPicker;
Button ShowDatePicker;
Button ShowTimePicker;
Button Set;
Button ReSet;
Button Cancel;
DatePicker DPic;
TimePicker TPic;
TextView Date;
private ViewSwitcher switcher;
static final int DATE_TIME_DIALOG_ID = 999;
Dialog dialog;

public void showDateTimeDialog(){


        //final Calendar c = Calendar.getInstance();

        final SimpleDateFormat dfDate = new SimpleDateFormat("dd-MMM-yyyy HH:mm");



            dialog = new Dialog(NfcscannerActivity.this);
            dialog.setContentView(R.layout.datetimepicker);
            switcher = (ViewSwitcher) dialog.findViewById(R.id.DateTimePickerVS);

            TPic = (TimePicker) dialog.findViewById(R.id.TimePicker);
            DPic = (DatePicker) dialog.findViewById(R.id.DatePicker);
            TPic.setIs24HourView(true);



            ShowDatePicker = ((Button) dialog.findViewById(R.id.SwitchToDate));
            ShowDatePicker.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    switcher.showPrevious();
                    ShowDatePicker.setEnabled(false);
                    ShowTimePicker.setEnabled(true);
                }
            });
            ShowTimePicker = ((Button) dialog.findViewById(R.id.SwitchToTime));
            ShowTimePicker.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    switcher.showNext();
                    ShowDatePicker.setEnabled(true);
                    ShowTimePicker.setEnabled(false);
                }
            });

            Set = ((Button) dialog.findViewById(R.id.SetDateTime));
            Set.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {

                    Calendar c = Calendar.getInstance();
                    c.set(DPic.getYear(),  DPic.getMonth(), DPic.getDayOfMonth(), TPic.getCurrentHour(), TPic.getCurrentMinute());
                    Log.e(TAG, "TPic hour and minute = " + TPic.getCurrentHour() + " " +  TPic.getCurrentMinute());
                    timeSetOnSpinner = new DateTime(c);


................
................
...............
            //check if time is suitable, if not call showDateTimeDialog() again


                }
            });
            ReSet = ((Button) dialog.findViewById(R.id.ResetDateTime));
            ReSet.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    Calendar c = Calendar.getInstance();
                    DPic.updateDate(c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));
                    TPic.setCurrentHour(c.get(Calendar.HOUR_OF_DAY));
                    TPic.setCurrentMinute(c.get(Calendar.MINUTE));
                }
            });
            Cancel = ((Button) dialog.findViewById(R.id.CancelDialog));
            Cancel.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {

                    dialog.cancel();



                }
            });

            dialog.setTitle("Please enter time of last logout");

            try{
                ReSet.performClick();
            dialog.show();
            }catch(Exception e){
                //ignore
            }
            Log.e(TAG,"Just executed dialog.show() and at the end of showDateTimeDialog method");
        }//showDateTimeDialog()

        @Override
        protected Dialog onCreateDialog(int id) {
            switch (id) {
            case DATE_TIME_DIALOG_ID:

                return dialog;
            }
            return null;
        }

.

<?xml version="1.0" encoding="UTF-8"?>
<RelativeLayout 

    android:padding="5dip" 
    android:fitsSystemWindows="true" 
    android:layout_height="wrap_content" 
    android:layout_width="fill_parent" 
    android:id="@+id/DateTimePicker" 
    xmlns:android="http://schemas.android.com/apk/res/android">

    <LinearLayout 

        android:layout_height="wrap_content" 
        android:layout_width="fill_parent" 
        android:id="@+id/ViewSwitchButtons" 
        android:layout_marginBottom="5dip"> 

        <Button 
            android:layout_height="wrap_content" 
            android:layout_width="0dip" 
            android:id="@+id/SwitchToDate" 
            android:text="Set date" 
            android:enabled="false" 
            android:layout_weight="1"/>

        <Button 
            android:layout_height="wrap_content" 
            android:layout_width="0dip" 
            android:id="@+id/SwitchToTime" 
            android:text="Set time" 
            android:layout_weight="1"/>

        </LinearLayout> 

        <ViewSwitcher 
            android:layout_height="wrap_content" 
            android:layout_width="fill_parent" 
            android:id="@+id/DateTimePickerVS" 
            android:layout_below="@+id/ViewSwitchButtons" 
            android:outAnimation="@android:anim/fade_out" 
            android:inAnimation="@android:anim/fade_in"> 



                <LinearLayout 
                    android:layout_height="fill_parent" 
                    android:layout_width="fill_parent" 
                    android:id="@+id/TimeLayout" 
                    android:fillViewport="true"> 

                    <TimePicker 
                        android:layout_height="wrap_content" 
                        android:layout_width="fill_parent" 
                        android:id="@+id/TimePicker" 
                        android:layout_marginRight="5dip" 
                        android:layout_marginLeft="5dip"/>

                    </LinearLayout> 

                <LinearLayout android:layout_height="fill_parent" 
                android:layout_width="fill_parent" 
                android:id="@+id/DateLayout" 
                android:fillViewport="true"> 

                <DatePicker 
                    android:layout_height="wrap_content" 
                    android:layout_width="fill_parent" 
                    android:id="@+id/DatePicker" 
                    android:layout_marginRight="5dip" 
                    android:layout_marginLeft="5dip"/>

                </LinearLayout> 

                    </ViewSwitcher> 

                    <LinearLayout 
                        android:layout_height="wrap_content" 
                        android:layout_width="fill_parent" 
                        android:id="@+id/ControlButtons" 
                        android:layout_below="@+id/DateTimePicker" 
                        android:paddingTop="185dip"> 

                        <Button 
                            android:layout_height="wrap_content" 
                            android:layout_width="0dip" 
                            android:id="@+id/SetDateTime" 
                            android:text="@android:string/ok" 
                            android:layout_weight="1"/> 

                            <Button 
                                android:layout_height="wrap_content" 
                                android:layout_width="0dip" 
                                android:id="@+id/ResetDateTime" 
                                android:text="Reset" 
                                android:layout_weight="1"/>

                            <Button 
                                android:layout_height="wrap_content" 
                                android:layout_width="0dip" 
                                android:id="@+id/CancelDialog" 
                                android:text="@android:string/cancel" 
                                android:layout_weight="1"/> 

                                </LinearLayout> 

                                </RelativeLayout>

Answer 1

Android: How to get the time from a TimePicker when it is typed in

似乎 DatePicker 或 TimePicker 在其焦点消失时更新自己的值。使用 clearFocus()设置按钮的OnClickListener中的方法。

我认为代码应该是这样的:

Set = ((Button) dialog.findViewById(R.id.SetDateTime));
Set.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        DPic.clearFocus();
        TPic.clearFocus();

        Calendar c = Calendar.getInstance();
        c.set(DPic.getYear(),  DPic.getMonth(), DPic.getDayOfMonth(),
                TPic.getCurrentHour(), TPic.getCurrentMinute());
        Log.e(TAG, "TPic hour and minute = " + TPic.getCurrentHour()
                + " " +  TPic.getCurrentMinute());
        timeSetOnSpinner = new DateTime(c);
    }
});

请注意 ShowDTPicker、ShowDatePicker、ShowTimePicker、Set、ReSet , Cancel, DPic, TPic, Date 未遵循 Java naming conventions .首字母大写的名称用于 classes or interfaces (并且 Date 类也存在!)。如果它们是公共(public)类变量，则它们的每个首字母都应小写。还使用 mSwitcher 而不是 switcher 因为它是私有(private)类变量。