Android TimePicker 的使用

1.Android设置TimePicker样式和字体颜色

Android默认的TimePicker有两种，6.0为Dialog样式，6.0之前为Spinner样式

设置TimePicker选择器风格

一种是

android:timePickerMode="clock"

image.png

另一种是

android:timePickerMode="spinner"

[图片上传中...(image.png-7ac7c0-1593766325814-0)]

image.png

TimePicker的显示规模大小设置

数字越大 显示越大

android:scaleX="2"
android:scaleY="2"

TimePicker的数据回调

mTimepicker = (TimePicker) inflate.findViewById(R.id.timepicker);
mTimepicker.setDescendantFocusability(TimePicker.FOCUS_BLOCK_DESCENDANTS);  //设置点击事件不弹键盘
mTimepicker.setIs24HourView(true);   //设置时间显示为24小时
mTimepicker.setHour(8);  //设置当前小时
mTimepicker.setMinute(10); //设置当前分（0-59）
mTimepicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {  //获取当前选择的时间
    @Override
    public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
    }
});

利用反射修改一些选择器的字体效果与背景颜色
需要用到反射的方法了，比如更改分割线的样式，设置起始截止时间等：

首先我们要通过反射获取TimePicker源码里hour和minute的id：

Resources systemResources = Resources.getSystem();
int hourNumberPickerId = systemResources.getIdentifier("hour", "id", "android");
int minuteNumberPickerId = systemResources.getIdentifier("minute", "id", "android");

然后用我们定义的TimePicker来获取这个id并转换成hour和minute对应的NumberPicker:

NumberPicker hourNumberPicker = (NumberPicker) mTimepicker.findViewById(hourNumberPickerId);
NumberPicker minuteNumberPicker = (NumberPicker) mTimepicker.findViewById(minuteNumberPickerId);

通过获取到的hourNumberPicker和minuteNumberPicker我们可以先进行TimePicker的时间限制：

hourNumberPicker.setMinValue(8);   //设置最小hour
hourNumberPicker.setMaxValue(12);  //设置最大hour
minuteNumberPicker .setMinValue(0);  //设置最小minute
minuteNumberPicker .setMaxValue(30);  //设置最大minute

修改滚动条背景颜色

hourNumberPicker.setBackgroundColor(getResources().getColor(R.color.colorBlue));// 修改背景颜色

image.png

隐藏冒号
用最暴力的方式隐藏滚动条的冒号，就是直接找ChildAt

    ViewGroup view = (ViewGroup) mTimepicker.getChildAt(0);
    ViewGroup view2 = (ViewGroup) view.getChildAt(1);
    view2.getChildAt(1).setVisibility(View.GONE);

禁止键盘输入

mTimePicker.setDescendantFocusability(TimePicker.FOCUS_BLOCK_DESCENDANTS);

TimePicker分割线的颜色和高度

private void setNumberPickerDivider(NumberPicker numberPicker) {
    NumberPicker picker = numberPicker;
    Field[] pickerFields = NumberPicker.class.getDeclaredFields();
    for (Field pf : pickerFields) {
        if (pf.getName().equals("mSelectionDivider")) {  //设置颜色
            pf.setAccessible(true);
            ColorDrawable colorDrawable = new ColorDrawable(
                    ContextCompat.getColor(this, R.color.colortime)); //选择自己喜欢的颜色
            try {
                pf.set(numberPicker, colorDrawable);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
        if (pf.getName().equals("mSelectionDividerHeight")) {   //设置高度
            pf.setAccessible(true);
            try {
                int result = 3;  //要设置的高度
                pf.set(picker, result);
            } catch (Exception e) {
                e.printStackTrace();
            }
            break;
        }
        picker.invalidate();
    }
}