Android TimePicker 问题

Question

在 Android 上，我使用 TimePicker 对话框设置了 EditText。现在是默认时间，但使用 TimePicker 时间会发生变化。

我有三个问题：

1) 选择其他时间，有时EditText上显示的时间不会改变；

2) 如果我在 TimePicker 上提示并选择相同的时间，它会更改 +12h（例如现在是 09.35 但它显示 21.35）；

3) 如果我选择一个小时 >= 17.00 我得到一个例外：

07-19 11:47:17.574 16224-16224/com.example.myapp E/AndroidRuntime: FATAL EXCEPTION: main
                                                                        Process: com.example.myapp, PID: 16224
                                                                        java.lang.ArrayIndexOutOfBoundsException: length=17; index=18
                                                                            at java.util.Calendar.set(Calendar.java:1122)
                                                                            at com.example.myapp.activities.MyActivity$9.onTimeSet(MyActivity.java:513)
                                                                            at android.app.TimePickerDialog.onClick(TimePickerDialog.java:133)
                                                                            at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:160)
                                                                            at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                            at android.os.Looper.loop(Looper.java:135)
                                                                            at android.app.ActivityThread.main(ActivityThread.java:5376)
                                                                            at java.lang.reflect.Method.invoke(Native Method)
                                                                            at java.lang.reflect.Method.invoke(Method.java:372)
                                                                            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
                                                                            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)

这是我的 TimePicker 函数：

// TimePicker settings
public void setTimeFields(final EditText editText) {
    // Calendar instance
    final Calendar calendar = Calendar.getInstance();
    // TimePicker definition
    TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
            calendar.set(hourOfDay, minute);
            editText.setText(new SimpleDateFormat("HH:mm", Locale.ITALIAN).format(calendar.getTime()));
        }
    }, calendar.get(Calendar.HOUR), calendar.get(Calendar.MINUTE), DateFormat.is24HourFormat(this));
    // Show dialog
    timePickerDialog.show();
}

这里是我的editext定义：

etxTime = (EditText) findViewById(R.id.etxTime);
etxTime.setInputType(InputType.TYPE_NULL);
etxTime.setText(new SimpleDateFormat("HH:mm", Locale.ITALIAN).format(Calendar.getInstance().getTime()));
etxTime.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { setTimeFields(etxTime); } });

我哪里错了？

Answer 1

date.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {

            // Show Date dialog
            showDialog(Date_id);
        }
    });
    time.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {

            // Show time dialog
            showDialog(Time_id);
        }
    });
}

protected Dialog onCreateDialog(int id) {

    // Get the calander
    Calendar c = Calendar.getInstance();

    // From calander get the year, month, day, hour, minute
    int year = c.get(Calendar.YEAR);
    int month = c.get(Calendar.MONTH);
    int day = c.get(Calendar.DAY_OF_MONTH);
    int hour = c.get(Calendar.HOUR_OF_DAY);
    int minute = c.get(Calendar.MINUTE);

    switch (id) {
        case Date_id:

            // Open the datepicker dialog
            return new DatePickerDialog(MainActivity.this, date_listener, year,
                    month, day);
        case Time_id:

            // Open the timepicker dialog
            return new TimePickerDialog(MainActivity.this, time_listener, hour,
                    minute, false);

    }
    return null;
}

// Date picker dialog
DatePickerDialog.OnDateSetListener date_listener = new DatePickerDialog.OnDateSetListener() {

    @Override
    public void onDateSet(DatePicker view, int year, int month, int day) {
        // store the data in one string and set it to text
        String date1 = String.valueOf(month) + "/" + String.valueOf(day)
                + "/" + String.valueOf(year);
        set_date.setText(date1);
    }
};
TimePickerDialog.OnTimeSetListener time_listener = new TimePickerDialog.OnTimeSetListener() {

    @Override
    public void onTimeSet(TimePicker view, int hour, int minute) {
        // store the data in one string and set it to text
        String time1 = String.valueOf(hour) + ":" + String.valueOf(minute);
        set_time.setText(time1);
    }
};

在这种情况下，“date”、“time”是按钮，“set_date”、“set_time”是editTexts。

Answer 2

出现您描述的第三个问题是因为参数Calendar.set(int, int) 不是小时和分钟，而是field 和要设置的值。如果您查看链接中的表格，您会看到该字段的最大 int 值为 17。因此您的代码应如下所示：

public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
    calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
    calendar.set(Calendar.MINUTE, minute);
    editText.setText(new SimpleDateFormat("HH:mm", Locale.ITALIAN).format(calendar.getTime()));
}