您好，我嘗試在自定義視圖中添加視圖系結，但不幸的是，我的自定義視圖不可見，一切正常，但是當我打開活動時，自定義視圖不顯示
我的自定義視圖類
class StickerView @JvmOverloads constructor(
context: Context,
attributeSet: AttributeSet?=null,
defStyle:Int = 0
) : ConstraintLayout(context,attributeSet,defStyle),View.OnClickListener {
private val binding = ItemStickerBinding.inflate(LayoutInflater.from(context),this,true)
private var segmentedVerticalSeekBar: SegmentedVerticalSeekBar? = null
private var btn1: ImageButton?=null
private var btn2: ImageButton?=null
private var btn3: ImageButton?=null
private var btn4: ImageButton?=null
private var btn5: ImageButton?=null
private var btn6: ImageButton?=null
private var btn0: ImageButton?=null
init {
init(context)
}
override fun onClick(v: View?) {
when(v?.id){
R.id.appCompatButton ->{
}
R.id.appCompatButton1 ->{
}
R.id.appCompatButton2 ->{
}
R.id.appCompatButton3 ->{
}
R.id.appCompatButton4 ->{
}
R.id.appCompatButton5 ->{
}
R.id.appCompatButton6 ->{
}
}
}
private fun init(context: Context){
inflate(context,R.layout.item_sticker,this)
segmentedVerticalSeekBar = binding.svsLevelView
btn0 = binding.appCompatButton
btn1 = binding.appCompatButton1
btn2 = binding.appCompatButton2
btn3 = binding.appCompatButton3
btn4 = binding.appCompatButton4
btn5 = binding.appCompatButton5
btn6 = binding.appCompatButton6
btn6?.setOnClickListener(this)
}
override fun onLayout(changed: Boolean, l: Int, t: Int, r: Int, b: Int) {
}
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
setMeasuredDimension(Int.MAX_VALUE,400)
}
}
主要活動
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/background"
tools:context=".MainActivity">
<com.example.emoticker.StickerView
android:id="@ id/stickerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<include layout="@layout/item_sticker"/>
</com.example.emoticker.StickerView>
</androidx.constraintlayout.widget.Constraint
我的自定義視圖布局 item_sticker.xml
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="150dp"
xmlns:tools="http://schemas.android.com/tools"
android:background="@color/background"
tools:context=".StickerView"
xmlns:app="http://schemas.android.com/apk/res-auto">
<com.ss.svs.SegmentedVerticalSeekBar
android:id="@ id/svsLevelView"
android:layout_width="60dp"
android:layout_height="0dp"
android:layout_gravity="center"
android:layout_marginStart="20dp"
android:layout_marginTop="15dp"
android:layout_marginBottom="15dp"
app:backgroundColor="@color/white"
app:cornerRadius="10dp"
app:currentValue="2"
app:delimiterColor="@color/white"
app:isAllRadius="true"
app:layout_constraintBottom_toTopOf="@ id/appCompatButton6"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:maxValue="4"
app:progressColor="@color/color_progress"
app:pyramidViewEnable="true"
app:step="1"
app:touchDisabled="false" />
<ImageView
android:layout_width="100dp"
android:layout_height="0dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
app:layout_constraintBottom_toTopOf="@ id/linearLayout"
app:layout_constraintEnd_toEndOf="@ id/linearLayout"
app:layout_constraintStart_toStartOf="@ id/linearLayout"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="@ id/linearLayout"
android:layout_width="0dp"
android:layout_height="30dp"
android:layout_marginStart="20dp"
android:layout_marginEnd="15dp"
android:layout_marginBottom="5dp"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@ id/svsLevelView">
<ImageButton
android:id="@ id/appCompatButton"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginStart="5dp"
android:layout_weight="1"
android:background="@color/white"
android:src="@drawable/laughing_emoji_svgrepo_com" />
<ImageButton
android:id="@ id/appCompatButton1"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginStart="5dp"
android:layout_weight="1"
android:background="@color/white"
android:src="@drawable/scare_svgrepo_com" />
<ImageButton
android:id="@ id/appCompatButton2"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginStart="5dp"
android:layout_weight="1"
android:background="@color/white"
android:src="@drawable/crying_emoji_svgrepo_com" />
<ImageButton
android:id="@ id/appCompatButton3"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginStart="5dp"
android:layout_weight="1"
android:background="@color/white"
android:src="@drawable/sick_svgrepo_com" />
<ImageButton
android:id="@ id/appCompatButton4"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginStart="5dp"
android:layout_weight="1"
android:background="@color/white"
android:src="@drawable/shocked_emoji_svgrepo_com" />
<ImageButton
android:id="@ id/appCompatButton5"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_gravity="center"
android:layout_marginStart="5dp"
android:layout_marginEnd="5dp"
android:layout_weight="1"
android:background="@color/white"
android:src="@drawable/angry_svgrepo_com" />
</LinearLayout>
<ImageButton
android:id="@ id/appCompatButton6"
android:layout_width="50dp"
android:layout_height="30dp"
android:layout_gravity="center"
android:layout_weight="1"
android:background="@color/white"
android:src="@drawable/ic_baseline_subdirectory_arrow_left_24"
app:layout_constraintBottom_toBottomOf="@ id/linearLayout"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@ id/linearLayout" />
</androidx.constraintlayout.widget.ConstraintLayout>
如果你們幫我為我糟糕的英語道歉，我會很感激你們
uj5u.com熱心網友回復：
您正在覆寫onLayout，但其中沒有代碼。因此，當視圖需要自行布置時......它不需要！洗掉該onLayout功能，它應該可以作業。
另外，不要呼叫inflate該init函式。您已經膨脹了布局并將其添加到您的自定義視圖中：
private val binding = ItemStickerBinding.inflate(LayoutInflater.from(context),this,true)
如果您再次膨脹，您將創建一個新布局并替換舊布局。binding是從舊布局創建的，它的所有參考都指向舊視圖。
你也不想要這個，這是一個重復的布局：
<include layout="@layout/item_sticker"/>
就像我如何用視圖系結撰寫這個類的一個例子——也許它有幫助！無論如何，它應該更容易使用：
// subclass FrameLayout instead - you're inflating a layout and putting it -inside-
// your custom view, so a FrameLayout (which is meant to hold a single view) is better
// and safer than a ConstraintLayout (which you're not providing constraints for -
// it could break at some point, or act weird)
// I've removed the View.OnClickListener interface because I'm setting the listeners
// another way
class StickerView @JvmOverloads constructor(
context: Context,
attributeSet: AttributeSet?=null,
defStyle:Int = 0
) : FrameLayout(context,attributeSet,defStyle) {
// this inflates your layout and adds it to the view - job done!
private val binding =
ItemStickerBinding.inflate(LayoutInflater.from(context),this,true)
// If you need to refer to a view you've bound, you usually do it through
// the binding object - so "binding.appCompatButton0" etc, and there are ways
// to avoid saying "binding" all the time (see the init block below).
// But if you really want aliases, you could do it this way:
val btn0: ImageButton get() = binding.appCompatButton
init {
// this lets you avoid saying binding.this, binding.that - it can look neater
with(binding) {
// set a single click listener on multiple views
listOf(
appCompatButton, appCompatButton1, appCompatButton2,
appCompatButton3, appCompatButton4, appCompatButton5, appCompatButton6
).forEach { button ->
// call our onClick function with the clicked view
button.setOnClickListener { view -> onClick(view)}
// or setOnClickListener(::onClick)
}
// or you could set each button's action here, like this
appCompatButton1.setOnClickListener { doThing() }
appCompatButton2.setOnClickListener { doSomethingElse() }
}
}
// handle all your button clicks in a function if you want -
// v doesn't need to be nullable
private fun onClick(v: View) {
// because you're using view binding, you have references to all the views -
// so you don't need to use IDs at all
when (v) {
binding.appCompatButton -> { doThing() }
}
}
就個人而言，如果您希望為按鈕命名btn0等，我會將它們的 ID 從 重命名appCompatButton為btn0- 這樣您就可以將它們稱為binding.btn0，如果您愿意這樣想的話！給他們你想使用的名字。
希望有幫助！
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/479637.html
標籤：安卓 科特林 安卓自定义视图 android-viewbinding
上一篇：kotlin序列化陣列