相关疑难解决方法(0)

我在Android L模拟器上测试我的应用程序,我注意到TimePickerDialog已经显着改变了:

这不符合我的应用程序的主题,我想知道在Android L上运行时是否可以获得旧的TimePickerDialog样式.

我看了一下这个答案,但是使用了API timepickerdialog(下面的代码)我想在我的类中设置timePickerMode属性.java有可能吗？

    public static class TimePickerFragment extends DialogFragment
                            implements TimePickerDialog.OnTimeSetListener {

    @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()));
    }

    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        // Do something with the time chosen by the …

我试图了解如何正确地将选项从react-native的js端传递到java端.

react-native桥使用ReadableMap进行转换,但作为Java noob,我无法理解其工作原理.

更具体地说,我不明白:

• 实际转换如何运作？
• 如何判断下游Java代码需要什么类型/格式？
• 如何正确使用ReadableMap来做到这一点？

一般来说,我想知道这是如何工作的,但我会给出一个具体的例子,我正在考虑给出一些背景信息.

react-native软件包公开了一个日期时间选择器.

JS方面有一个showTimePicker方法:

showTimePicker(date, callback) {
    date = date || new Date();
    console.log(this.props);
    debugger
    var options = {
        ...this.props,
        hour:date.getHours(),
        minute:date.getMinutes()
    };
    RCTDateTimePicker.showTimePicker(options, function (hour, minute) {
        date.setHours(hour);
        date.setMinutes(minute);
        callback(date);
    });
}

RCTDateTimePicker.showTimePicker在本机端桥接到Java 方法:

@ReactMethod
public void showTimePicker(ReadableMap options, Callback callback) {
    DialogFragment timePicker = new TimePicker(options, callback);
    timePicker.show(activity.getFragmentManager(), "timePicker");
}

哪个叫

public TimePicker(ReadableMap options, Callback callback) {
    final Calendar c = Calendar.getInstance();
    this.callback = callback;
    hour = options.hasKey("hour") …