Question

我想创建ChipGroup 2路绑定适配器。我已经复制了默认的RadioGroup绑定适配器，但进行了一些更改，但不适用于两种方式。如果以编程方式将数据设置为可观察，则ChipGroup将从中检索更改。但是手动选择芯片不会将更改设置为可观察。

这是我的适配器

@InverseBindingMethods(InverseBindingMethod(type = ChipGroup::class, attribute = "android:checkedButton", method = "getCheckedRadioButtonId"))
class ChipGroupBindingAdapter {
companion object {
    @JvmStatic
    @BindingAdapter("android:checkedButton")
    fun setCheckedChip(view: ChipGroup?, id: Int) {
        if (id != view?.checkedChipId) {
            view?.check(id)
        }
    }

    @JvmStatic
    @BindingAdapter(value = ["android:onCheckedChanged", "android:checkedButtonAttrChanged"], requireAll = false)
    fun setChipsListeners(view: ChipGroup?, listener: ChipGroup.OnCheckedChangeListener?,
                          attrChange: InverseBindingListener?) {
        if (attrChange == null) {
            view?.setOnCheckedChangeListener(listener)
        } else {
            view?.setOnCheckedChangeListener { group, checkedId ->
                listener?.onCheckedChanged(group, checkedId)
                attrChange.onChange()
                }
            }
        }
    }
}

布局文件：

<android.support.design.chip.ChipGroup
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checkedButton="@{viewModel.checkedBtnObs}"
        app:singleSelection="true">

        <android.support.design.chip.Chip
            android:id="@+id/first_chip"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="110dp"
            android:layout_height="wrap_content"
            android:checkable="true"
            android:text="@string/month_12"
            app:chipBackgroundColor="@drawable/chip_background_selector" />

        <android.support.design.chip.Chip
            android:id="@+id/second_chip"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="110dp"
            android:layout_height="wrap_content"
            android:checkable="true"
            android:text="@string/month_6"
            android:textAlignment="center"
            app:chipBackgroundColor="@drawable/chip_background_selector" />

        <android.support.design.chip.Chip
            android:id="@+id/third_chip"
            style="@style/Widget.MaterialComponents.Chip.Choice"
            android:layout_width="110dp"
            android:layout_height="wrap_content"
            android:checkable="true"
            android:text="@string/month_1"
            app:chipBackgroundColor="@drawable/chip_background_selector" />

    </android.support.design.chip.ChipGroup>

而且可以观察到：

val checkedBtnObs = ObservableInt(R.id.second_chip)

Answer 1

if (attrChange == null) {
            view?.setOnCheckedChangeListener(listener)
        } else {
            view?.setOnCheckedChangeListener { group, checkedId ->
                listener?.onCheckedChanged(group, checkedId)
                attrChange.onChange()
                }
            }
        }

也许应该是

if (listener != null) {
            view?.setOnCheckedChangeListener(listener)
        } else {
            view?.setOnCheckedChangeListener { group, checkedId ->
                listener?.onCheckedChanged(group, checkedId)
                attrChange.onChange()
                }
            }
        }

Answer 2

我得到了 def _employee_get(self): return self.env['hr.employee'].search([('user_id', '=', uid)], limit=1) 和 ChipGroup 按预期工作并使用了 DataBinding 的推荐方式，如果有人想知道，这是我的实现：

InverseDataBinding：

SomeBindingAdapters.kt

... object PropertyTypeFilterBindingAdapters { @BindingAdapter("propertyTypeFilter") @JvmStatic fun ChipGroup.bindPropertyTypeFilter(marsApiFilter: MarsApiFilter?) = marsApiFilter?.let { filter -> when (filter) { MarsApiFilter.ALL -> check(R.id.filter_all_properties_chip) MarsApiFilter.RENT -> check(R.id.filter_properties_for_rent_chip) MarsApiFilter.BUY -> check(R.id.filter_properties_for_buy_chip) } } @InverseBindingAdapter(attribute = "propertyTypeFilter") @JvmStatic fun ChipGroup.convertToMarsApiFilter(): MarsApiFilter = when (checkedChipId) { R.id.filter_properties_for_rent_chip -> MarsApiFilter.RENT R.id.filter_properties_for_buy_chip -> MarsApiFilter.BUY else -> MarsApiFilter.ALL } @BindingAdapter("propertyTypeFilterAttrChanged") @JvmStatic fun ChipGroup.setListeners(attrChange: InverseBindingListener?) = setOnCheckedChangeListener { _, _ -> attrChange?.onChange() } } ... 是针对我的具体情况的枚举类。

MarsApiFilter：

some_layout.xml

... <com.google.android.material.chip.ChipGroup android:id="@+id/filter_property_type_chip_group" ... bind:propertyTypeFilter="@={viewModel.propertyTypeFilter}" > <com.google.android.material.chip.Chip android:id="@+id/filter_all_properties_chip" ... /> <com.google.android.material.chip.Chip android:id="@+id/filter_properties_for_rent_chip" ... /> <com.google.android.material.chip.Chip android:id="@+id/filter_properties_for_buy_chip" ... /> </com.google.android.material.chip.ChipGroup> ... 只是一个声明为常规命名空间的奇特命名空间：bind

xmlns:bind="http://schemas.android.com/apk/res-auto"：

SomeViewModel.kt

ChipGroup 2路绑定适配器

2 个答案: