使用dialogfragment从datepicker获取日期
使用dialogfragment从datepicker获取日期
提问于 2012-07-18 00:41:28
我正在使用google示例使用对话片段在我的应用程序中插入一个datepicker
http://developer.android.com/guide/topics/ui/controls/pickers.html
但是我不确定在设置之后如何获取日期(不是java专家)。对话框和日期选择器运行正常，我可以记录日期已正确设置，但是，我如何才能在父活动上执行回调？
这是我的对话框片段
public class DatePickerFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
public void onDateSet(DatePicker view, int year, int month, int day) {
**Log.w("DatePicker","Date = " + year);**
}
}...and我从我的活动中调用对话框...
public void showDatePickerDialog(View v) {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getSupportFragmentManager(), "datePicker");
}在父activity中调用方法而不是Log.w的正确方式是什么？我认为这与将回调作为参数传递有关，但我在互联网上找到的大多数参考资料都是关于没有对话片段的早期版本的。
编辑:不确定它是否重要，但父活动声明为：
public class EditSessionActivity extends FragmentActivity {解决方案:感谢Lecho user，这就是实现它的方法
DatePickerFragmennt.class
public class DatePickerFragment extends DialogFragment{
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), (EditSessionActivity)getActivity(), year, month, day);
}
}...and父活动EditSessionActivity.class...
public class EditSessionActivity extends FragmentActivity implements OnDateSetListener {
...
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
//do some stuff for example write on log and update TextField on activity
Log.w("DatePicker","Date = " + year);
((EditText) findViewById(R.id.tf_date)).setText("Date = " + year);
}回答 9
Stack Overflow用户
回答已采纳
发布于 2012-07-18 01:18:09
DatePickerDialog的构造函数将DatePickerDialog.OnDateSetListener作为第二个参数，因此您可能应该在父activity EditSessionActivity中(而不是在DatePickerFragment中)实现该接口，并更改此行：
return new DatePickerDialog(getActivity(), this, year, month, day);如下所示：
return new DatePickerDialog(getActivity(), (EditSessionActivity)getActivity(), year, month, day);然后，您的活动应该如下所示：
public class EditSessionActivity extends FragmentActivity implements
DatePickerDialog.OnDateSetListener{
public void onDateSet(DatePicker view, int year, int month, int day) {
//use date in your activity
}
...
}Stack Overflow用户
发布于 2013-02-07 20:58:14
我在显示日期选择器的类中简单地覆盖了日期选择器创建中的onDateSet。请看下面的代码：
private OnClickListener onDateClicked() {
return new OnClickListener() {
@Override
public void onClick(View v) {
DialogFragment newFragment = new DatePickerFragment() {
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
salePaymentCustomView.setBtDateText("" + day + "/" + month+1 + "/" + year);
}
};
newFragment.show(getActivity().getSupportFragmentManager(), "datePicker");
}
};
} Stack Overflow用户
发布于 2013-05-12 07:14:58
该问题也可以在不将onDateSet方法移动到父活动的情况下解决。您只需告诉DatePickerFragment在哪里搜索视图：
public class DatePickerFragment extends DialogFragment implements
DatePickerDialog.OnDateSetListener {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}
public void onDateSet(DatePicker view, int year, int month, int day) {
// do some stuff for example write on log and update TextField on activity
Log.w("DatePicker","Date = " + year);
((TextView) getActivity().findViewById(R.id.tf_date)).setText("Date = " + year);
}
}我还将强制转换的目标从EditText更改为TextView。这样，您就可以将您的实现重用于不同种类的视图，而不仅仅是EditText。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11527051
复制相关文章
相似问题
腾讯云开发者
