咨询：能否在Android Time Picker Dialog中禁用过去时间？

这个需求完全可以实现，以下是几种实用的实现方式：

方式一：通过回调校验选择时间（兼容全API版本） #

在时间选择完成的回调中，对比选中时间与当前时间，若选中时间早于当前时间则提示用户并重新弹出选择框：

Calendar currentTime = Calendar.getInstance();
int currentHour = currentTime.get(Calendar.HOUR_OF_DAY);
int currentMinute = currentTime.get(Calendar.MINUTE);

TimePickerDialog timePickerDialog = new TimePickerDialog(this,
        (view, selectedHour, selectedMinute) -> {
            Calendar selectedTime = Calendar.getInstance();
            selectedTime.set(Calendar.HOUR_OF_DAY, selectedHour);
            selectedTime.set(Calendar.MINUTE, selectedMinute);
            
            if (selectedTime.before(currentTime)) {
                Toast.makeText(this, "无法选择过去的时间", Toast.LENGTH_SHORT).show();
                // 重新弹出对话框让用户选择合法时间
                timePickerDialog.show();
            } else {
                // 处理选中的合法时间逻辑
            }
        }, currentHour, currentMinute, true);
timePickerDialog.show();

方式二：API 26+ 直接设置最小时间（更优雅） #

从Android 8.0（API 26）开始，TimePicker支持直接调用setMinTime()方法限制可选时间范围，无需手动校验：

Calendar currentTime = Calendar.getInstance();
long currentMillis = currentTime.getTimeInMillis();

TimePickerDialog timePickerDialog = new TimePickerDialog(this, null,
        currentTime.get(Calendar.HOUR_OF_DAY),
        currentTime.get(Calendar.MINUTE), true);

// 设置可选的最小时间为当前时刻
timePickerDialog.getTimePicker().setMinTime(currentMillis);
timePickerDialog.show();

方式三：使用Material Design TimePicker（推荐现代项目） #

如果你的项目使用Material Components库，MaterialTimePicker是更符合设计规范的选择，同样可以通过回调校验实现需求：

Calendar currentTime = Calendar.getInstance();
MaterialTimePicker picker = new MaterialTimePicker.Builder()
        .setHour(currentTime.get(Calendar.HOUR_OF_DAY))
        .setMinute(currentTime.get(Calendar.MINUTE))
        .setTimeFormat(TimeFormat.CLOCK_24H)
        .build();

picker.addOnPositiveButtonClickListener(dialog -> {
    Calendar selectedTime = Calendar.getInstance();
    selectedTime.set(Calendar.HOUR_OF_DAY, picker.getHour());
    selectedTime.set(Calendar.MINUTE, picker.getMinute());
    
    if (selectedTime.before(currentTime)) {
        Toast.makeText(this, "无法选择过去的时间", Toast.LENGTH_SHORT).show();
        picker.show(getSupportFragmentManager(), "TIME_PICKER_TAG");
    } else {
        // 处理合法时间逻辑
    }
});

picker.show(getSupportFragmentManager(), "TIME_PICKER_TAG");

内容的提问来源于stack exchange，提问作者Coop Cab