1、基本使用
1、简单使用
<DatePicker
android:startYear="2017"
android:endYear="2018"
android:calendarViewShown="false"
android:spinnersShown="true"
android:datePickerMode="spinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
- calendarViewShown：是否显示ClendarView日历组件
- spinnersShown：是否显示Spinner日期选择组件
- datePickerMode：有两个值
- calendar：日历形式的日期选择器
- Spinner：滚动的
calendarViewShown="false"，spinnersShown="true"，使用日期组件
calendarViewShown="true"，spinnersShown="true"，使用日历和日期组件
使用日历组件
2、初始化datePicker
private void initPicker() {
//设置中文日历
calendar = Calendar.getInstance(Locale.CHINA);
int year=calendar.get(Calendar.YEAR);
int month=calendar.get(Calendar.MONTH);
int day=calendar.get(Calendar.DAY_OF_MONTH);
int week=calendar.get(Calendar.DAY_OF_WEEK);
//初始化datePicker
datePicker.init(year, month, day, new DatePicker.OnDateChangedListener() {
@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
}
});
//设置最大日期
GregorianCalendar g=new GregorianCalendar(year,month,day+7);
datePicker.setMaxDate(g.getTimeInMillis());
}
3、初始化numberPicker
private void initPicker() {
...
//设置numberPicker展示的值，一个数组
numberPicker.setDisplayedValues(times);
//numberPicker的最小值
numberPicker.setMinValue(0);
//numberPicker的最大值
numberPicker.setMaxValue(length-1);
//numberPicker当前值
numberPicker.setValue(preId);
numberPicker.setDescendantFocusability(NumberPicker.FOCUS_BLOCK_DESCENDANTS);
}
3、设置NumberPicker，中间的EditView不可以点击
中间不可点击修改
datePicker.setDescendantFocusability(DatePicker.FOCUS_BLOCK_DESCENDANTS);
4、设置NumberPicker，不能循环
numPicker.setWrapSelectorWheel(false);
numberpicker的循环滚动需要遍历所有元素，可能会导致的数组越界（当再次为numberpicker赋值时...）
2、获得DatePicker的三个NumberPicker
DatePicker中选择年月日的部分是三个NumberPicker，名字分别为mYearSpinner，mMonthSpinner、mDaySpinner，它们三个平铺在一个LinearLayout中，可以通过如下方法得到这些NumberPicker：
- 利用java反射技术得到DatePicker内部的属性（三个NumberPicker），并对其进行操作（适用于API<21）
- 可以通过三个NumberPicker的资源id，得到这些view（API>=21，这三个NumberPicker，不是DatePicker内部的属性）。或者根据view树的结构，得到NumberPicker
DatePicker
public class DatePicker extends FrameLayout {
...
/**
* A delegate implementing the basic DatePicker
*/
private static class DatePickerSpinnerDelegate extends AbstractDatePickerDelegate {
...
private final LinearLayout mSpinners;
private final NumberPicker mDaySpinner;
private final NumberPicker mMonthSpinner;
private final NumberPicker mYearSpinner;
}
}
代码如下：
private void getNumberPicker() {
Class<? extends DatePicker> c =DatePicker.class;
Field fd = null, fm = null, fy = null;
View daySpinner = null;
View monthSpinner= null;
View yearSpinner = null;
// 系统版本大于5.0
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
//获取资源的id
int daySpinnerId = Resources.getSystem().getIdentifier("day", "id", "android");
int monthSpinnerId = Resources.getSystem().getIdentifier("month", "id", "android");
int yearSpinnerId = Resources.getSystem().getIdentifier("year", "id", "android");
if (daySpinnerId != 0 && monthSpinnerId!=0 && yearSpinnerId!=0) {
daySpinner = this.findViewById(daySpinnerId);
monthSpinner = this.findViewById(monthSpinnerId);
yearSpinner = this.findViewById(yearSpinnerId);
}
//或者
/*LinearLayout llFirst = (LinearLayout) getChildAt(0);
LinearLayout mSpinners = (LinearLayout) llFirst.getChildAt(0);
for (int i = 0; i < mSpinners.getChildCount(); i++)
{
NumberPicker picker = (NumberPicker) mSpinners.getChildAt(i);
mPickers.add(i, picker);
}
return;*/
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
// 系统版本大于4.0
fd = c.getDeclaredField("mDaySpinner");
fm = c.getDeclaredField("mMonthSpinner");
fy = c.getDeclaredField("mYearSpinner");
if(fd!=null && fm!=null &&fy!=null){
// 对字段获取设置权限
fd.setAccessible(true);
fm.setAccessible(true);
fy.setAccessible(true);
// 得到对应的控件
daySpinner = (View) fd.get(this);
monthSpinner= (View) fm.get(this);
yearSpinner= (View) fy.get(this);
}
} else {
fd = c.getDeclaredField("mDayPicker");
fm = c.getDeclaredField("mMonthPicker");
fy = c.getDeclaredField("mYearPicker");
if(fd!=null && fm!=null &&fy!=null){
// 对字段获取设置权限
fd.setAccessible(true);
fm.setAccessible(true);
fy.setAccessible(true);
// 得到对应的控件
daySpinner = (View) fd.get(this);
monthSpinner= (View) fm.get(this);
yearSpinner= (View) fy.get(this);
}
}
if (daySpinner != null && monthSpinner != null && yearSpinner != null) {
daySpinner.setVisibility(View.GONE);
if(daySpinner instanceof NumberPicker && monthSpinner instanceof NumberPicker && yearSpinner instanceof NumberPicker ){
mPickers.add((NumberPicker) daySpinner);
mPickers.add((NumberPicker) monthSpinner);
mPickers.add((NumberPicker) yearSpinner);
}
}
}
注意：getIdentifier(String name, String defType, String defPackage) ：获取资源ID
资源的名称 /资源的类型(drawable,string等) /包名
3、修改NumberPicker
/**
* 设置picker之间的间距
*/
private void setPickerMargin(NumberPicker picker) {
LinearLayout.LayoutParams p= (LinearLayout.LayoutParams) picker.getLayoutParams();
p.setMargins(0,0,0,0);
if(Build.VERSION.SDK_INT> Build.VERSION_CODES.JELLY_BEAN_MR1){
p.setMarginStart(0);
p.setMarginEnd(0);
}
}
/**
* 设置picker分割线的颜色
*/
private void setDividerColor(NumberPicker picker) {
Field field=NumberPicker.class.getDeclaredField("mSelectionDivider");
if(field!=null){
field.setAccessible(true);
field.set(picker,new ColorDrawable(Color.RED));
}
}
/**
* 设置picker分割线的宽度
*/
private void setNumberPickerDivider(NumberPicker picker) {
Field[] fields=NumberPicker.class.getDeclaredFields();
for(Field f:fields){
if(f.getName().equals("mSelectionDividerHeight")){
f.setAccessible(true);
f.set(picker,1);
break;
}
}
}
修改前
修改后
参考：Android NumberPicker 修改分割线颜色和高度及字体颜色大小、更改DatePicker中年月日的间隔和分隔线颜色
