我想要什么：按钮文本是“08:00”现在。 当点击按钮，它显示了一个timepicker。 所选择的时间设置为按钮文本。 （报警应用程序）。 我看过一些这方面的教程和问题，答案，但还没有找到解答。 之后，我按下时钟按钮的应用程序崩溃。 如果我把onCreateView参与评论它的工作原理。 它说：android.util.AndroidRuntimeException：requestFeature（）必须在添加内容之前被调用。
public class TimeSet extends DialogFragment implements TimePickerDialog.OnTimeSetListener {
private Button clock;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// R.layout.my_layout - that's the layout where your textview is placed
View view = inflater.inflate(R.layout.listview_item_row, container, false);
clock = (Button)view.findViewById(R.id.ora);
// you can use your textview.
return view;
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
clock.setText(new StringBuilder().append(hourOfDay).append(":").append(minute));
}
}
从评论
When clicks the button it shows a timepicker. The user select the time and the time chosen is showed as the buttons text (alarm app).
有没有必要夸大的布局。
http://developer.android.com/guide/topics/ui/controls/pickers.html
使用一个接口作为回调到活动中。
在按钮点击显示DialogFragment 。 使用界面。 实现了相同的活动，并设置时间按钮
public class TimePickerFragment extends DialogFragment
implements TimePickerDialog.OnTimeSetListener {
public interface PickTime
{
public void returnTime(String value);
}
PickTime mCallback;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
mCallback = (PickTime) getActivity();
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,
DateFormat.is24HourFormat(getActivity()));
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
if(mCallback!=null)
{
StringBuilder sb = new StringBuilder();
sb.append(hourOfDay);
sb.append(":");
sb.append(minute);
mCallback.returnTime(sb.toString());
}
}
}
在您的活动
public class MainActivity extends ActionBarActivity implements PickTime{
Button button;
TimePickerFragment newFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button1)
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
newFragment = new TimePickerFragment();
newFragment.show(getSupportFragmentManager(), "timePicker");
}
});
}
@Override
public void returnTime(String value) {
// TODO Auto-generated method stub
button.setText(value);
}
}
