Question

我正在尝试更改NumberPicker的文本颜色！

我希望在不同的状态下使用不同的颜色，如果启用状态并禁用状态的不同颜色。

这是我的号码选择码：

 <NumberPicker
                    android:id="@+id/NumberOfWebsitesPicker"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:scaleX="0.75"
                    style="@style/MyStyle"
                    android:descendantFocusability="blocksDescendants"
                    android:scaleY="0.75" />

这是

下的text_color.xml

Res-＆gt; Color Direcoty

 <?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_enabled="false" android:color="#9D9FA2" />
    <item android:state_enabled="true" android:color="#FAFAFA" />

</selector>

现在这是我的style.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="android:colorBackground">@color/colorBackground</item>

        <!--  It should be true otherwise action mode will not overlay toolbar -->
        <item name="windowActionModeOverlay">true</item>
        <!--  For Custom Action Mode Background Color/Drawable -->
        <item name="actionModeBackground">@color/colorPrimary</item>

        <item name="android:textColor">@color/text_color</item>

        <item name="android:textColorPrimary">@color/text_color</item>

        <item name="android:colorControlNormal">@color/divider_color</item>

        <item name="android:divider">@color/divider_color</item>

        <item name="android:textColorHint">@color/colorPrimary</item>

        <item name="android:textSize">@dimen/font_size_14</item>

        <item name="actionBarSize">56dp</item>

        <item name="android:spinnerItemStyle">@style/Spinner_Item_Style</item>
        <item name="android:spinnerDropDownItemStyle">@style/Spinner_DropDown_Item_Style</item>
        <item name="android:dropDownListViewStyle">@style/SpinnerStyle</item>


    </style>


    <style name="Divider">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">2dp</item>
        <item name="android:background">@color/divider_color</item>
    </style>

    <style name="DividerThin">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">2px</item>
        <item name="android:background">@color/divider_color</item>
    </style>

    <style name="Vertical_divider" parent="DividerThin">
        <item name="android:layout_width">2px</item>
        <item name="android:background">@color/divider_color</item>
        <item name="android:layout_height">match_parent</item>
    </style>

    <style name="Vertical_divider_thick" parent="Divider">
        <item name="android:layout_width">2dp</item>
        <item name="android:background">@color/divider_color</item>
        <item name="android:layout_height">match_parent</item>
    </style>


    <style name="Spinner_Item_Style">
        <item name="android:gravity">center</item>
        <item name="android:textAlignment">center</item>
    </style>

    <style name="Spinner_DropDown_Item_Style" parent="Widget.AppCompat.ListView.DropDown">
        <item name="android:gravity">center</item>
        <item name="android:textAlignment">center</item>
        <item name="android:paddingStart">@dimen/unit_8dp</item>
        <item name="android:paddingEnd">@dimen/unit_8dp</item>

    </style>

    <style name="SpinnerStyle" parent="Widget.AppCompat.ListView.DropDown">
        <item name="android:divider">@color/divider_color</item>
        <item name="android:dividerHeight">1px</item>
    </style>


    <style name="MyStyle">

        <item name="android:colorPrimary">@color/text_color</item>

    </style>


</resources>

现在这里它只能运行一次，下次当数字选择器被禁用时，它会保持其颜色为白色，并且不会改变颜色，并在text_color选择器文件中声明其禁用的颜色。

我不知道为什么它只工作一次，

如果在CreateCicker上禁用了Numberpicker，它将获得禁用状态的颜色当我通过按下按钮手动禁用选择器时，它会将文本颜色更改为禁用颜色，但是当我启用它时，它会采用启用颜色的颜色并更改值并再次禁用它，它不会转到禁用颜色。

它只能运行一次，并且在更改选择器的值后不起作用。

Answer 1

我通过使用以下代码解决了此问题：

fun setEnabledNumberPicker(numberPicker: NumberPicker, isEnable : Boolean) {
    numberPicker.isEnabled = isEnable
    val enablePickerColor = ContextCompat.getColor(requireContext(), R.color.textEnabled)
    val disablePickerColor = ContextCompat.getColor(requireContext(), R.color.textDisabled)

    try {
        val selectorWheelPaintField: Field = numberPicker.javaClass
            .getDeclaredField("mSelectorWheelPaint")
        selectorWheelPaintField.isAccessible = true
        if (isEnable)
            (selectorWheelPaintField.get(numberPicker) as Paint).color = enablePickerColor
        else
            (selectorWheelPaintField.get(numberPicker) as Paint).color = disablePickerColor
    } catch (e: NoSuchFieldException) {
        e.printStackTrace()
    } catch (e: IllegalAccessException) {
        e.printStackTrace()
    } catch (e: IllegalArgumentException) {
        e.printStackTrace()
    }
    val count = numberPicker.childCount
    for (i in 0 until count) {
        val child = numberPicker.getChildAt(i)
        if (child is EditText) {
            if (isEnable)
                child.setTextColor(enablePickerColor)
            else
                child.setTextColor(disablePickerColor)

        }
    }
    numberPicker.invalidate()
}

通过状态选择器更改数字选择器的文本颜色

1 个答案: