隐藏日，月，或一年的DatePicker在安卓5.0+棒棒糖 [英] Hide Day, Month, or Year from DatePicker in Android 5.0+ Lollipop
问题描述
我一直在寻找一个解决方案的时候，使的DatePicker以下纺纱中的任何一个。对于Android 5.0的内部变量发生了变化，在我的情况下，日和月纺纱更新到我的设备后，再次是可见的。
I've been searching for a solution to hide any one of the following spinners from the DatePicker. For Android 5.0 the internal variables were changed and, in my case, the Day and Month spinners were visible again after the update to my device.
Android的4.4和奇巧的解决方案
DatePicker dpDate = (DatePicker) findViewById(R.id.dpDate);
// Initialize Date Picker
int year = dpDate.getYear();
int month = dpDate.getMonth();
int day = dpDate.getDayOfMonth();
dpDate.init(year, month, day, this);
Field f[] = dpDate.getClass().getDeclaredFields();
for (Field field : f)
{
// Hides the DAY spinner
if(field.getName().equals("mDayPicker") || field.getName().equals("mDaySpinner"))
{
field.setAccessible(true);
Object dayPicker = new Object();
dayPicker = field.get(dpDate);
((View) dayPicker).setVisibility(View.GONE);
}
// Hides the MONTH spinner
if(field.getName().equals("mMonthPicker") || field.getName().equals("mMonthSpinner"))
{
field.setAccessible(true);
Object monthPicker = new Object();
monthPicker = field.get(dpDate);
((View) monthPicker).setVisibility(View.GONE);
}
// Hides the YEAR spinner
if(field.getName().equals("mYearPicker") || field.getName().equals("mYearSpinner"))
{
field.setAccessible(true);
Object yearPicker = new Object();
yearPicker = field.get(dpDate);
((View) myearPicker).setVisibility(View.GONE);
}
}
的Android 5.0+棒棒堂的解决方案
DatePicker dpDate = (DatePicker) findViewById(R.id.dpDate);
// Initialize Date Picker
int year = dpDate.getYear();
int month = dpDate.getMonth();
int day = dpDate.getDayOfMonth();
dpDate.init(year, month, day, this);
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{
int daySpinnerId = Resources.getSystem().getIdentifier("day", "id", "android");
if (daySpinnerId != 0)
{
View daySpinner = dpDate.findViewById(daySpinnerId);
if (daySpinner != null)
{
daySpinner.setVisibility(View.GONE);
}
}
}
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{
int monthSpinnerId = Resources.getSystem().getIdentifier("month", "id", "android");
if (monthSpinnerId != 0)
{
View monthSpinner = dpDate.findViewById(monthSpinnerId);
if (monthSpinner != null)
{
monthSpinner.setVisibility(View.GONE);
}
}
}
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
{
int yearSpinnerId = Resources.getSystem().getIdentifier("year", "id", "android");
if (yearSpinnerId != 0)
{
View yearSpinner = dpDate.findViewById(yearSpinnerId);
if (yearSpinner != null)
{
yearSpinner.setVisibility(View.GONE);
}
}
}
我发现上面的解决这个问题就在这里： <一href="http://stackoverflow.com/questions/26460682/custom-date-picker-dialog-in-android-lollipop">Custom日期选择器对话框中的Android棒棒堂
I found the above solution to this problem here: Custom Date Picker Dialog in Android Lollipop
我想确保它是易于搜索，以便其他人可以受益于这个，所以我创造了这个新的职位。 （该解决方案花了好几个小时来定位和理解，所以我希望能帮助别人用这个）。
I wanted to make sure that it was easily searchable so others could benefit from this so I created this new post. (The solution took me several hours to locate and understand, so I hope to help someone with this).
我测试过这一点，它完美的作品。事实上，如果你把对棒棒堂的解决方案，然后再下，在code，放了奇巧的解决方案，那么它是两个版本无干扰兼容。 （请确保使用try / catch语句;）
I've tested this and it works perfectly. In fact, if you put the solution for the Lollipop first and then under that, in the code, put the solution for Kitkat, then it is compatible for both versions without interference. (Make sure to use try/catch ;)
修改2015年7月22日： 我认为这是明显的，如果一人使用，它需要初始化一个datepicker。我包括code，说明你需要初始化的DatePicker运行的code中的其余部分（在这两种情况下）之前，否则你的观点会抛出一个NullPointerException异常。这包括yearSpinner抛出一个空。此外，你应该至少有一个看法的日期，不要隐藏所有3，即不隐瞒的日，月，并在同一时间一年。
EDIT 7.22.2015: I thought it was obvious if one was using a DatePicker that it needed to be initialized. I included the code to show that you need to initialize the DatePicker before you run the rest of the code (in both situations) otherwise your Views will throw a NullPointerException. That includes the yearSpinner throwing a null. Also, you should have at least one view for the date, don't hide all 3, i.e., don't hide the day, month, and the year at the same time.
推荐答案
只是为了懒人，这种完全集成的code（任何SDK），它为我工作，以建立一个月份选择器（90％等于@Brandon建议）：
Just for the lazy bones, this the fully integrated code (any SDK) that is working for me to build a month picker (90% equal to @Brandon suggestion):
public void initMonthPicker(){
dp_mes = (DatePicker) findViewById(R.id.dp_mes);
int year = dp_mes.getYear();
int month = dp_mes.getMonth();
int day = dp_mes.getDayOfMonth();
dp_mes.init(year, month, day, new DatePicker.OnDateChangedListener() {
@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
month_i = monthOfYear + 1;
Log.e("selected month:", Integer.toString(month_i));
//Add whatever you need to handle Date changes
}
});
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP){
int daySpinnerId = Resources.getSystem().getIdentifier("day", "id", "android");
if (daySpinnerId != 0)
{
View daySpinner = dp_mes.findViewById(daySpinnerId);
if (daySpinner != null)
{
daySpinner.setVisibility(View.GONE);
}
}
int monthSpinnerId = Resources.getSystem().getIdentifier("month", "id", "android");
if (monthSpinnerId != 0)
{
View monthSpinner = dp_mes.findViewById(monthSpinnerId);
if (monthSpinner != null)
{
monthSpinner.setVisibility(View.VISIBLE);
}
}
int yearSpinnerId = Resources.getSystem().getIdentifier("year", "id", "android");
if (yearSpinnerId != 0)
{
View yearSpinner = dp_mes.findViewById(yearSpinnerId);
if (yearSpinner != null)
{
yearSpinner.setVisibility(View.GONE);
}
}
} else { //Older SDK versions
Field f[] = dp_mes.getClass().getDeclaredFields();
for (Field field : f)
{
if(field.getName().equals("mDayPicker") || field.getName().equals("mDaySpinner"))
{
field.setAccessible(true);
Object dayPicker = null;
try {
dayPicker = field.get(dp_mes);
} catch (IllegalAccessException e) {
e.printStackTrace();
}
((View) dayPicker).setVisibility(View.GONE);
}
if(field.getName().equals("mMonthPicker") || field.getName().equals("mMonthSpinner"))
{
field.setAccessible(true);
Object monthPicker = null;
try {
monthPicker = field.get(dp_mes);
} catch (IllegalAccessException e) {
e.printStackTrace();
}
((View) monthPicker).setVisibility(View.VISIBLE);
}
if(field.getName().equals("mYearPicker") || field.getName().equals("mYearSpinner"))
{
field.setAccessible(true);
Object yearPicker = null;
try {
yearPicker = field.get(dp_mes);
} catch (IllegalAccessException e) {
e.printStackTrace();
}
((View) yearPicker).setVisibility(View.GONE);
}
}
}
}
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