我需要从片段中创建DatePeriodPicker,如下所示:
要创建日期时段对话框,我需要使用.show();方法。 在这种方法中,我需要传递fragmentManager。
DatePickerDialog dpd = DatePickerDialog.newInstance(
Fragment_Details.this,
1999,
3-1,
2,2000,2-1,3
);
dpd.setYearRange(2000,2020);
Calendar max_calendar = Calendar.getInstance();
dpd.setMaxDate(max_calendar);
dpd.show(getFragmentManager(),"P")
我的项目已迁移到androidX,因此每当我通过片段管理器时,它都会通过androidx片段管理器:(来自我的项目)
import androidx.fragment.app.Fragment;
但是,我尝试使用的库中位于类中的方法.show()使用此导入:
import android.app.Fragment;
我尝试创建一个Java类,扩展了appcompat活动,并将fragmentmanager(android.app.Fragment)传递给方法.show()。该方法识别出片段管理器来自(AppCompat),但是在我从片段创建此类的新实例后,它可能会崩溃。
这是我崩溃时的日志:
D/ViewRootImpl@13a430d[PopupWindow:c0edac8]: ViewPostIme pointer 1
D/AbsListView: onTouchUp() mTouchMode : 0
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.mybimpos, PID: 19385
java.lang.IllegalStateException: Activity has been destroyed
at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1901)
at android.app.BackStackRecord.commitInternal(BackStackRecord.java:688)
at android.app.BackStackRecord.commit(BackStackRecord.java:646)
at android.app.DialogFragment.show(DialogFragment.java:233)
at com.example.mybimpos.Dialog_attemp_2.<init>(Dialog_attemp_2.java:17)
at com.example.mybimpos.Fragment_Reports_Details$2.onItemSelected(Fragment_Reports_Details.java:802)
at org.angmarch.views.NiceSpinner$2.onItemClick(NiceSpinner.java:177)
at android.widget.AdapterView.performItemClick(AdapterView.java:350)
at android.widget.AbsListView.performItemClick(AbsListView.java:1683)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:4094)
at android.widget.AbsListView$10.run(AbsListView.java:6583)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
这是我创建的试图通过appcompat片段管理器的类:
public class Dialog_attemp_2 extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {
public Dialog_attemp_2() {
DatePickerDialog dpd = DatePickerDialog.newInstance(
Dialog_attemp_2.this,
1999,
3-1,
2,2000,2-1,3
);
dpd.setYearRange(2000,2020);
Calendar max_calendar = Calendar.getInstance();
dpd.setMaxDate(max_calendar);
dpd.show(getFragmentManager(),"pierre");
}
@Override
public void onDateSet(DatePickerDialog view, int year, int monthOfYear, int dayOfMonth, int yearEnd, int monthOfYearEnd, int dayOfMonthEnd) {
}
}
我使用以下代码从片段中调用此类:
new Dialog_attemp_2();
答案 0 :(得分:3)
使用androidx,您可以使用实例DialogFragment
定义一个DatePickerDialog
import androidx.fragment.app.DialogFragment;
public static 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 something with the date chosen by the user
}
}
并通过以下方式调用它:
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getSupportFragmentManager(), "datePicker");
选项2:新的材料组件
有了Material Components for Android,您可以使用新的MaterialDatePicker
。
当前它正在积极开发中,并且需要版本 1.1.0 的Android库的材料组件。
implementation 'com.google.android.material:material:1.1.0-alpha09'
要选择单个日期,只需使用:
MaterialDatePicker.Builder<Long> builder = MaterialDatePicker.Builder.datePicker();
builder.setTitleText(R.string.your_text);
MaterialDatePicker<Long> picker = builder.build();
picker.show(getSupportFragmentManager(), picker.toString());
要选择范围日期,您可以使用DateRange Picker,方法是:
MaterialDatePicker.Builder<Pair<Long, Long>> builder =
MaterialDatePicker.Builder.dateRangePicker();
CalendarConstraints.Builder constraintsBuilder = new CalendarConstraints.Builder(); builder.setCalendarConstraints(constraintsBuilder.build());
MaterialDatePicker<?> picker = builder.build();
picker.show(getSupportFragmentManager(), picker.toString());
答案 1 :(得分:0)
如果您确实需要使用此fragmentmanager,则可以添加应用程序兼容性依赖项
添加gradle依赖项:
"implementation 'androidx.appcompat:appcompat:1.0.2'"
并从AppCompatActivity扩展您的活动。然后将getFragmentManager()更改为getSupportFragmentManager()。