android - 带有 RecyclerView 的自定义对话框在屏幕上膨胀得非常小
问题描述
我创建了一个对话框函数，它在屏幕上创建一个对话框，您可以在其中从 RecyclerView 中选择一些内容（底部的 RView 适配器代码）：
fun showSelectACategoryDialog(context: Context,allCategories: LiveData<List<NotesCategory>>, owner: Fragment,chosenCategoryID: (categoryID: Long) -> Unit) {
val dialog = Dialog(context)
val adapter = DialogCategoriesRecyclerViewAdapter(context, chosenCategoryID)
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
dialog.setCancelable(true)
dialog.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
dialog.setContentView(R.layout.dialog_select_category)
dialog.dialog_select_a_category_recyclerView.adapter = adapter
allCategories.observe(owner, Observer {
adapter.submitList(it)
})
// Click listeners
dialog.show()
然后使用以下命令调用对话框函数：
binding.notesCategoryTextView.setOnClickListener {
showSelectACategoryDialog(
context!!,
notesEditViewModel.allCategories,
NotesEditFragment(),
selectedCategory(notesCategory)
)
}
但是当对话框被调用时，它看起来像这样：
这是对话框的回收器视图适配器的代码，以防相关：
class DialogCategoriesRecyclerViewAdapter(
var context: Context,
var chosenCategoryID: (categoryID: Long) -> Unit
) : ListAdapter<NotesCategory, DialogCategoriesRecyclerViewAdapter.ViewHolder>(SingleCategoryDiffCallback()) {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder = ViewHolder.from(parent)
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.bind(getItem(position), context)
holder.itemView.setOnClickListener {
chosenCategoryID(getItem(position).categoryID)
}
}
class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
private val categoryNameTextView: TextView = itemView.findViewById(R.id.dialog_select_a_category_textView)
fun bind(item: NotesCategory, context: Context) {
categoryNameTextView.text = item.categoryName
}
companion object {
fun from(parent: ViewGroup): ViewHolder {
val view = LayoutInflater.from(parent.context).inflate(
R.layout.row_dialog_select_category_all_categories, parent, false
)
return ViewHolder(view)
}
}
}
}
这是不起作用的对话框的 XML 布局：
<?xml version="1.0" encoding="utf-8"?>
<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:layout_margin = "16dp"
android:background = "@drawable/dialog_rounded_background">
<TextView
android:id = "@+id/dialog_select_a_category_title"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_marginTop = "16dp"
android:text = "@string/dialog_categories_title"
android:textColor = "@color/Black"
android:textSize = "25sp"
app:layout_constraintEnd_toEndOf = "parent"
app:layout_constraintHorizontal_bias = "0.5"
app:layout_constraintStart_toStartOf = "parent"
app:layout_constraintTop_toTopOf = "parent" />
<androidx.constraintlayout.widget.ConstraintLayout
android:id = "@+id/create_new_category_button"
android:layout_width = "0dp"
android:layout_height = "wrap_content"
android:layout_marginStart = "16dp"
android:layout_marginTop = "16dp"
android:layout_marginEnd = "16dp"
android:background = "@drawable/border_square_transparent"
app:layout_constraintEnd_toEndOf = "parent"
app:layout_constraintHorizontal_bias = "0.5"
app:layout_constraintStart_toStartOf = "parent"
app:layout_constraintTop_toBottomOf = "@+id/dialog_select_a_category_title"
tools:ignore = "RtlSymmetry">
<ImageView
android:id = "@+id/_imageview"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_marginStart = "16dp"
app:layout_constraintBottom_toBottomOf = "parent"
app:layout_constraintStart_toStartOf = "parent"
app:layout_constraintTop_toTopOf = "parent"
app:srcCompat = "@drawable/dialog_plus"
tools:ignore = "ContentDescription" />
<TextView
android:id = "@+id/_textview"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_margin = "16dp"
android:layout_marginStart = "56dp"
android:text = "@string/dialog_create_new_category_button"
android:textColor = "@color/Black"
android:textSize = "20sp"
app:layout_constraintBottom_toBottomOf = "parent"
app:layout_constraintEnd_toEndOf = "parent"
app:layout_constraintStart_toEndOf = "@+id/_imageview"
app:layout_constraintTop_toTopOf = "parent"
app:layout_constraintVertical_bias = "0.506" />
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.recyclerview.widget.RecyclerView
android:id = "@+id/dialog_select_a_category_recyclerView"
android:layout_width = "0dp"
android:layout_height = "0dp"
android:layout_marginStart = "16dp"
android:layout_marginTop = "16dp"
android:layout_marginEnd = "16dp"
android:layout_marginBottom = "20dp"
android:background = "@drawable/border_square_transparent"
app:layoutManager = "androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toBottomOf = "parent"
app:layout_constraintEnd_toEndOf = "parent"
app:layout_constraintHorizontal_bias = "0.5"
app:layout_constraintStart_toStartOf = "parent"
app:layout_constraintTop_toBottomOf = "@+id/create_new_category_button"
tools:listitem = "@layout/row_dialog_select_category_all_categories" />
</androidx.constraintlayout.widget.ConstraintLayout>
这是有效的对话框的 XML 布局：
<?xml version="1.0" encoding="utf-8"?>
<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 = "wrap_content"
android:layout_margin = "16dp"
android:background = "@drawable/dialog_rounded_background">
<ImageButton
android:id = "@+id/dialog_create_category_confirm"
android:layout_width = "50dp"
android:layout_height = "50dp"
android:layout_marginStart = "208dp"
android:layout_marginTop = "64dp"
android:layout_marginEnd = "16dp"
android:layout_marginBottom = "16dp"
android:background = "@android:color/transparent"
android:src = "@drawable/dialog_check"
app:layout_constraintBottom_toBottomOf = "parent"
app:layout_constraintEnd_toEndOf = "@+id/dialog_create_category_category_name"
app:layout_constraintStart_toEndOf = "@+id/dialog_create_category_cancel"
app:layout_constraintTop_toBottomOf = "@+id/dialog_create_category_category_name"
tools:ignore = "ContentDescription" />
<ImageButton
android:id = "@+id/dialog_create_category_cancel"
android:layout_width = "50dp"
android:layout_height = "50dp"
android:layout_marginStart = "16dp"
android:layout_marginTop = "64dp"
android:layout_marginBottom = "16dp"
android:background = "@android:color/transparent"
android:src = "@drawable/dialog_cancel"
app:layout_constraintBottom_toBottomOf = "parent"
app:layout_constraintStart_toStartOf = "@+id/dialog_create_category_category_name"
app:layout_constraintTop_toBottomOf = "@+id/dialog_create_category_category_name"
tools:ignore = "ContentDescription" />
<EditText
android:id = "@+id/dialog_create_category_category_name"
android:layout_width = "0dp"
android:layout_height = "wrap_content"
android:layout_marginStart = "16dp"
android:layout_marginTop = "32dp"
android:layout_marginEnd = "16dp"
android:ems = "10"
android:hint = "@string/dialog_create_category_hint"
android:importantForAutofill = "no"
android:inputType = "textPersonName|textCapSentences"
app:layout_constraintEnd_toEndOf = "parent"
app:layout_constraintHorizontal_bias = "0.487"
app:layout_constraintStart_toStartOf = "parent"
app:layout_constraintTop_toBottomOf = "@+id/dialog_create_category_title" />
<TextView
android:id = "@+id/dialog_create_category_title"
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:layout_marginTop = "16dp"
android:text = "@string/dialog_create_a_category_title"
android:textColor = "@color/Black"
android:textSize = "30sp"
app:layout_constraintEnd_toEndOf = "parent"
app:layout_constraintHorizontal_bias = "0.5"
app:layout_constraintStart_toStartOf = "parent"
app:layout_constraintTop_toTopOf = "parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
通过单击“@+id/create_new_category_button”（这是屏幕上唯一显示的内容）调用第二个对话框，它可以很好地填充屏幕宽度减去边距
解决方案
您必须为对话框的布局定义固定大小，或者只创建一个全宽对话框。
尝试这个：
dialog.getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
推荐阅读
- javascript - 在图像旁边居中文本
- angularjs - 根据 cypress 环境变量中设置的值设置具体变量
- raspbian - 将树莓派切换到 64 位
- c - 为什么带有不存在接收器的 MPI_Send() 会给出错误而不是永远阻塞？
- django - 在 django 中进行有效过滤器查询的最佳方法
- android - AlarmManager 双触发
- css - antd 表单项上带有工具提示的图标
- node.js - 如何将 ReactJs 与使用 EJS Express Mongodb 作为堆栈的现有项目一起使用？
- laravel-8 - 为什么我在调用 app()->handle($request) 后出现了 redirect() 的问题
- asp.net - Swagger 不适用于 Digital Ocean 云中的 Docker