又是我。我正在做一个学校项目,并且我的Android应用程序获得了一些帮助。我需要在片段中放置一个TimePickerDialog,在这个片段中我有一个TextView,我想在此处选择小时。但是我找不到办法。当我做监听器时,它不起作用。
我试图将getActivity更改为可以解决的另一件事,但是它不起作用。
return new TimePickerDialog(getActivity(), (TimePickerDialog.OnTimeSetListener) getActivity(), hour, minute,
DateFormat.is24HourFormat(getActivity()));
这是我的主要片段XML:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".DespertarFragment">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="83dp"
android:layout_marginEnd="83dp"
android:text="Seleccione la hora"
android:textSize="30sp"
app:layout_constraintBottom_toTopOf="@+id/button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="161dp"
android:layout_marginTop="1dp"
android:layout_marginEnd="162dp"
android:text="Poner"
app:layout_constraintBottom_toTopOf="@+id/button_cancel"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView1" />
<Button
android:id="@+id/button_cancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="161dp"
android:layout_marginTop="145dp"
android:layout_marginEnd="162dp"
android:layout_marginBottom="156dp"
android:text="Cancelar"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button" />
</android.support.constraint.ConstraintLayout>
这是课程:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_despertar, container, false);
Button poner = (Button) view.findViewById(R.id.button);
poner.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DialogFragment timePicker = new TimePickerFragment();
timePicker.show(getFragmentManager(), "Timepo");
}
});
return view;
}
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
TextView textView = (TextView) view.findViewById(R.id.textView1);
textView.setText("Hora: " + hourOfDay + minute);
}
这是我的TimePickerDialog类:
public class TimePickerFragment extends DialogFragment {
@NonNull
@Override
public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
return new TimePickerDialog(getActivity(), HERE I DON'T KNOW WHAT CAN I PUT HERE TO PASS THE TIME TO MY MAIN FRAGMENT, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
}
注意:我不需要TimePickerDialog类中的onTimeSet,我需要主片段中的时间。
我希望ViewText有时间,但是它什么也没变。
答案 0 :(得分:0)
在TimePickerFragment中,将onCreateDialog()的代码放在onCreateView中。
答案 1 :(得分:0)
尝试一下,这是显示时间选择器的简单方法
private void timePick(final TextView textView) {
TimePickerDialog.OnTimeSetListener timer = new
TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
//set time in your text view
}
};
new TimePickerDialog(this,timer,currenthour,currentMinuts,false).show();
}
调用此方法
poner.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
timePick(yourextView);
}
});