[英]How do you find the radio buttons not clicked?
我有一個無線電組用於設置數據類的屬性,特別是三明治。 到目前為止,我的方法是這樣的:如果選中了三明治,我手動設置三明治可見,如果沒有選擇三明治,則手動設置三明治不可見。 我想通過使用一個函數來簡化它,但我不確定如何找到未選擇的單選按鈕 ID。 我是 Kotlin 和 Android 的新手,所以任何幫助將不勝感激。
fun onSandwichRadioButtonClicked(view: View) {
if (view is RadioButton) {
// Is the button now checked?
val checked = view.isChecked
// Check which radio button was clicked
when (view.getId()) {
R.id.panini_button ->
if (checked) {
sandwich.sandwichCost = 7.0f
sandwich.name = "Panini"
binding.panini.visibility = View.VISIBLE
binding.hoagie.visibility = View.GONE
binding.sandwich.visibility = View.GONE
}
R.id.hoagie_button ->
if (checked) {
sandwich.sandwichCost = 10.0f
sandwich.name = "Hoagie"
binding.panini.visibility = View.GONE
binding.hoagie.visibility = View.VISIBLE
binding.sandwich.visibility = View.GONE
}
R.id.sandwich_button ->
if (checked) {
sandwich.sandwichCost = 5.0f
sandwich.name = "Sandwich"
binding.panini.visibility = View.GONE
binding.hoagie.visibility = View.GONE
binding.sandwich.visibility = View.VISIBLE
}
}
sandwich.totalCost = (sandwich.extraCost + sandwich.sandwichCost).toString()
binding.invalidateAll()
Toast.makeText(
activity, "Total Cost :" +
" ${sandwich.totalCost}",
Toast.LENGTH_SHORT
).show()
}
}
fun setSandwich(sandwichName: String, sandwichCost: Float, sandwichImage: ImageView){
sandwich.sandwichCost = sandwichCost
sandwich.name = sandwichName
sandwichImage.visibility = View.VISIBLE
//set the remaining sandwiches to invisible. how do I find these sandwiches?
相關的xml代碼:
<ImageView
android:id="@+id/panini"
android:layout_width="192dp"
android:layout_height="79dp"
android:contentDescription="TODO"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.411"
app:srcCompat="@drawable/ic_food_obvious_panini"
tools:visibility="visible" />
<ImageView
android:id="@+id/hoagie"
android:layout_width="149dp"
android:layout_height="153dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.503"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.394"
app:srcCompat="@drawable/hoagie"
tools:visibility="gone" />
<ImageView
android:id="@+id/sandwich"
android:layout_width="140dp"
android:layout_height="311dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.345"
app:srcCompat="@drawable/ic_sandwhichanddrink"
tools:visibility="visible" />
<RadioGroup
android:id="@+id/sandwichRadioGroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintBottom_toTopOf="@+id/tomatoes_check"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.88">
<RadioButton
android:id="@+id/sandwich_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onSandwichRadioButtonClicked"
android:text="@string/sandwich"
android:textSize="24sp" />
<RadioButton
android:id="@+id/hoagie_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onSandwichRadioButtonClicked"
android:text="@string/hoagie"
android:textSize="24sp" />
<RadioButton
android:id="@+id/panini_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onSandwichRadioButtonClicked"
android:text="@string/panini"
android:textSize="24sp" />
</RadioGroup>
更新:我已經簡化了一點,但我覺得它仍然可以更好。 圖像視圖的 ArrayList 是我當前的解決方法:
fun onSandwichRadioButtonClicked(view: View) {
var notChosenSandwiches: ArrayList<ImageView> = ArrayList()
if (view is RadioButton) {
// Is the button now checked?
val checked = view.isChecked
// Check which radio button was clicked
when (view.getId()) {
R.id.panini_button ->
if (checked) {
notChosenSandwiches.clear()
notChosenSandwiches.add(binding.hoagie)
notChosenSandwiches.add(binding.sandwich)
setSandwich("Panini", 7.0f, binding.panini, notChosenSandwiches)
}
R.id.hoagie_button ->
if (checked) {
notChosenSandwiches.clear()
notChosenSandwiches.add(binding.panini)
notChosenSandwiches.add(binding.sandwich)
setSandwich("Hoagie", 10.0f, binding.hoagie, notChosenSandwiches)
}
R.id.sandwich_button ->
if (checked) {
notChosenSandwiches.clear()
notChosenSandwiches.add(binding.hoagie)
notChosenSandwiches.add(binding.panini)
setSandwich("Melt", 5.0f, binding.sandwich, notChosenSandwiches)
}
}
sandwich.totalCost = (sandwich.extraCost + sandwich.sandwichCost).toString()
binding.invalidateAll()
Toast.makeText(
activity, "Total Cost :" +
" ${sandwich.totalCost}",
Toast.LENGTH_SHORT
).show()
}
}
/**
* update the sandwich and the views
*
* @param sandwichName the new name of the sandwich
* @param sandwichCost the new cost of the sandwich
* @param shownImage the image of the sandwich
* @param hideThese the not chosen sandwiches
*/
fun setSandwich(sandwichName: String, sandwichCost: Float, shownImage: ImageView, hideThese: ArrayList<ImageView>){
sandwich.sandwichCost = sandwichCost
sandwich.name = sandwichName
shownImage.visibility = View.VISIBLE
for (image in hideThese)
image.visibility = View.GONE
}
您的問題是您知道所選按鈕的 ID,並且想要列出所有其他(未選擇的)ID,以便您可以對它們做一些有用的事情嗎?
看起來RadioGroup
不會為您提供其按鈕列表(只是當前選擇了哪個),因此您可能必須自己生成。 它是LinearLayout
的一個子類,所以它沒有做任何復雜的事情,它只是將所有RadioButton
作為直接子級,所以你可以這樣做:
sandwichButtons = sandwichRadioGroup.children
.filterIsInstance(RadioButton::class.java).toList()
這給你一個List<RadioButton>
。 或者,如果您只想要他們的 ID:
sandwichButtonIds = sandwichRadioGroup.children
.filterIsInstance(RadioButton::class.java)
.map { it.id }
.toList()
這是一個List<Int>
及其所有 ID( R.id.hoagie
值)。 如果您將其設置為lateinit var
字段,並在onCreate
或onViewCreated
或其他期間使用查找進行分配,您將擁有一個包含組中所有單選按鈕的不錯列表。 然后你可以做這樣的事情:
val unselected = sandwichButtonIds.minus(selectedId)
可能有很多事情可以幫助您完成工作,但我現在只能猜測,所以希望這是一個開始! “數據類,特別是三明治”也得到了我的支持
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.