概述
本文主要讲两个内容:1.如何将DatePicker和TimePicker放在一个dialog里面;2.改变他们的宽度;
问题1:其实现思路就是自定义一个Dialog,然后往里面同时放入DatePicker和TimePicker,直接贴代码:
date_time_picker.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:orientation="horizontal" > <!-- <DatePicker android:id="@+id/new_act_date_picker" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="0.6" android:calendarViewShown="false" /> <TimePicker android:id="@+id/new_act_time_picker" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="0.3"/> --> <DatePicker android:id="@+id/new_act_date_picker" android:layout_width="wrap_content" android:layout_height="wrap_content" android:calendarViewShown="false" /> <TimePicker android:id="@+id/new_act_time_picker" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout>
然后在需要显示日期时间选择器的地方(一般是一个onClickListener中)实例化dialog:
DemoActivity.java
arriveAtBtn.setOnClickListener(new View.OnClickListener(){ @SuppressLint("NewApi") @Override public void onClick(View v) { View view = View.inflate(getApplicationContext(), R.layout.date_time_picker, null); final DatePicker datePicker = (DatePicker)view.findViewById(R.id.new_act_date_picker); final TimePicker timePicker = (TimePicker)view.findViewById(R.id.new_act_time_picker); // Init DatePicker int year; int month; int day; if (StringUtils.isEmpty(arriveDateBtn.getText().toString())) { // Use the current date as the default date in the picker final Calendar c = Calendar.getInstance(); year = c.get(Calendar.YEAR); month = c.get(Calendar.MONTH); day = c.get(Calendar.DAY_OF_MONTH); } else { year = NewActActivity.arrive_year; month = NewActActivity.arrive_month; day = NewActActivity.arrive_day; } datePicker.init(year, month, day, null); // Init TimePicker int hour; int minute; if (StringUtils.isEmpty(arriveTimeBtn.getText().toString())) { // Use the current time as the default values for the picker final Calendar c = Calendar.getInstance(); hour = c.get(Calendar.HOUR_OF_DAY); minute = c.get(Calendar.MINUTE); } else { hour = NewActActivity.arrive_hour; minute = NewActActivity.arrive_min; } timePicker.setIs24HourView(true); timePicker.setCurrentHour(hour); timePicker.setCurrentMinute(minute); // Build DateTimeDialog AlertDialog.Builder builder = new AlertDialog.Builder(NewActActivity.this); builder.setView(view); builder.setTitle(R.string.new_act_date_time_picker_title); builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { arrive_year = datePicker.getYear(); arrive_month = datePicker.getMonth(); arrive_day = datePicker.getDayOfMonth(); String dateStr = DateUtil.formatDate(arrive_year, arrive_month, arrive_day); arriveDateBtn.setText(dateStr); arrive_hour = timePicker.getCurrentHour(); arrive_min = timePicker.getCurrentMinute(); String timeStr = DateUtil.formatTime(arrive_hour, arrive_min); arriveTimeBtn.setText(timeStr); } }); builder.show(); } });
这样就可以实现日期时间选择器了,这里就有点layout上的小问题,你是需要datepicker和timepicker水平排列还是竖直排列,竖直排列是没问题的:下面给出两个数值排列的效果图:
(1)DatePicker控件中设置android:calendarViewShown="false" 时的效果图:
(2)(1)DatePicker控件中设置android:spinnersShown="false" 时的效果图:
当然,如果你android:calendarViewShown和android:spinnersShown都不设置为false的话,会同时显示日历和滚动条样式,我想一般不会有人想要这样的视图吧。
水平排列是有问题的,那就是屏幕太挤,两个控件显示不全,看看效果图:
可是有人就是有水平排列的需求怎么办?这就是本文要讲的第二个问题:改变datepicker和timepicker的宽度。
网上找了很久,没有发现很有效的方法,说是这两个控件的子元素的宽度是不能自定义的,实际上把控件的所有属性看了一遍,也确实没有发现相关的属性;有人是通过自定义DatePicker和TimePicker来实现的,找了个demo,确实是实现了,不过已经相当于是自己写了一个插件了,我嫌麻烦,加之稳定性方面的考虑,没有去用,不过我会在最后把这个demo的src带上,有需要的人可以自己下载来研究。难道真不能改宽度吗?突然想到我是不是能从代码中的datePicker对象一步步往下找到其child,直接改child的宽度呢,于是debug,果然通过这种方式成功改变了宽度值,代码如下,只要在DemoActivity.java中增加一块专门用于实现改宽度的代码就行:
DemoActivity.java:
arriveAtBtn.setOnClickListener(new View.OnClickListener(){ @SuppressLint("NewApi") @Override public void onClick(View v) { View view = View.inflate(getApplicationContext(), R.layout.date_time_picker, null); final DatePicker datePicker = (DatePicker)view.findViewById(R.id.new_act_date_picker); final TimePicker timePicker = (TimePicker)view.findViewById(R.id.new_act_time_picker); // Change DatePicker layout LinearLayout dpContainer = (LinearLayout)datePicker.getChildAt(0) ; // LinearLayout LinearLayout dpSpinner = (LinearLayout)dpContainer.getChildAt(0); // 0 : LinearLayout; 1 : CalendarView for(int i = 0; i < dpSpinner.getChildCount(); i ++) { NumberPicker numPicker = (NumberPicker)dpSpinner.getChildAt(i); // 0-2 : NumberPicker LayoutParams params1 = new LayoutParams(120, LayoutParams.WRAP_CONTENT); params1.leftMargin = 0; params1.rightMargin = 30; numPicker.setLayoutParams(params1); // EditText cusET = (EditText)numPicker.getChildAt(0); // CustomEditText // cusET.setTextSize(14); // cusET.setWidth(70); } // Change TimePicker layout LinearLayout tpContainer = (LinearLayout)timePicker.getChildAt(0) ; // LinearLayout LinearLayout tpSpinner = (LinearLayout)tpContainer.getChildAt(0); // 0 : LinearLayout; 1 : CalendarView for(int i = 0; i < tpSpinner.getChildCount(); i ++) { // child(1) is a TextView ( : ) if (i == 1) { continue; } NumberPicker numPicker = (NumberPicker)tpSpinner.getChildAt(i); // 0 : NumberPicker; 1 : TextView; 2 : NumberPicker LayoutParams params3 = new LayoutParams(100, LayoutParams.WRAP_CONTENT); params3.leftMargin = 0; params3.rightMargin = 30; numPicker.setLayoutParams(params3); // EditText cusET = (EditText)numPicker.getChildAt(0); // CustomEditText // cusET.setTextSize(14); // cusET.setWidth(70); } // Init DatePicker int year; int month; int day; if (StringUtils.isEmpty(arriveDateBtn.getText().toString())) { // Use the current date as the default date in the picker final Calendar c = Calendar.getInstance(); year = c.get(Calendar.YEAR); month = c.get(Calendar.MONTH); day = c.get(Calendar.DAY_OF_MONTH); } else { year = NewActActivity.arrive_year; month = NewActActivity.arrive_month; day = NewActActivity.arrive_day; } datePicker.init(year, month, day, null); // Init TimePicker int hour; int minute; if (StringUtils.isEmpty(arriveTimeBtn.getText().toString())) { // Use the current time as the default values for the picker final Calendar c = Calendar.getInstance(); hour = c.get(Calendar.HOUR_OF_DAY); minute = c.get(Calendar.MINUTE); } else { hour = NewActActivity.arrive_hour; minute = NewActActivity.arrive_min; } timePicker.setIs24HourView(true); timePicker.setCurrentHour(hour); timePicker.setCurrentMinute(minute); // Build DateTimeDialog AlertDialog.Builder builder = new AlertDialog.Builder(NewActActivity.this); builder.setView(view); builder.setTitle(R.string.new_act_date_time_picker_title); builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { arrive_year = datePicker.getYear(); arrive_month = datePicker.getMonth(); arrive_day = datePicker.getDayOfMonth(); String dateStr = DateUtil.formatDate(arrive_year, arrive_month, arrive_day); arriveDateBtn.setText(dateStr); arrive_hour = timePicker.getCurrentHour(); arrive_min = timePicker.getCurrentMinute(); String timeStr = DateUtil.formatTime(arrive_hour, arrive_min); arriveTimeBtn.setText(timeStr); } }); builder.show(); } });
通过这种方式实现的效果图如下:
其实这种方法也有问题:我的手机是1080P(5.5寸)的屏,显示效果是这样,如果屏幕小点,分辨率更低的屏呢,很可能屏幕宽度不够显示,当然你可以修改一下上面代码的逻辑,根据屏幕大小来动态设置控件的宽度值,而不是设成定值,具体的这些细节按自己的需求来做吧,我这里只是想记录一下自己发现的这种改变datepicker和timepicker宽度的方法,至于是否实用,我不负责,我只当是学习一下android。不过我的项目里最终没有用这个方案,最终选择了垂直排列的日历格式那个方案。
最后附上别人实现的自定义DatePicker和TimePicker(MyPicker)
转载于:Android日期时间选择器实现以及自定义大小 - 星辰之力 - 博客园
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