自定义 AlertDialog 的圆角

问题描述

我一直在将我的应用程序忘记密码功能从活动更新为简单的自定义警报对话框。我应该如何向对话框窗口添加圆角？我已经阅读了多个教程，但在我的情况下似乎没有一个。我从某处读到我应该在某处使用 setBackgroundResources 方法，但我不确定在哪里。

Kotlin 代码

// Forgot password textview onClick Listener
    binding.tvForgotPassword.setonClickListener {

        // Inflate add_item_dialog.xml custom view
        val dialogView = LayoutInflater.from(this).inflate(R.layout.dialog_forgot_password,null)

        // Add AlertDialog Builder
        val dialogBuilder = AlertDialog.Builder(this)
            .setView(dialogView)

        // Binding add_item_dialog layout
        val dialogBinding = DialogForgotPasswordBinding.bind(dialogView)

        // Show Forgot password Dialog
        val customAlertDialog = dialogBuilder.show()
        dialogBinding.ivCloseDialog.setonClickListener {
            customAlertDialog.dismiss()
        }
    }

dialog_forgot_password.xml

<androidx.cardview.widget.CardView
    android:layout_width="350dp"
    android:layout_height="500dp"
    app:cardCornerRadius="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    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:layout_width="350dp"
        android:layout_height="500dp">


        <ImageView
            android:id="@+id/iv_closeDialog"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.94"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.060000002"
            app:srcCompat="@drawable/ic_close" />

        <TextView
            android:id="@+id/tv_forgotPasswordInfo"
            android:layout_width="250dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="30dp"
            android:gravity="center"
            android:textSize="18sp"
            android:text="@string/enter_email"
            android:textColor="@color/ColorPrimary"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/tv_forgotPassword" />

        <Button
            android:id="@+id/submitBtn"
            android:layout_width="200dp"
            android:layout_height="50dp"
            android:layout_marginBottom="20dp"
            android:background="@drawable/button"
            android:elevation="4dp"
            android:text="@string/submit"
            android:textColor="@color/white"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/emailForgot"
            app:layout_constraintVertical_bias="1.0" />

        <TextView
            android:id="@+id/tv_forgotPassword"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="36dp"
            android:fontFamily="sans-serif-black"
            android:text="@string/forgot_password"
            android:textColor="@color/ColorPrimary"
            android:textSize="40sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/iv_closeDialog" />

        <EditText
            android:id="@+id/emailForgot"
            android:layout_width="300dp"
            android:layout_height="40dp"
            android:background="@drawable/rounded_edittext"
            android:ems="10"
            android:hint="@string/email_address"
            android:importantForAutofill="no"
            android:inputType="textEmailAddress"
            android:paddingStart="15dp"
            android:textColorHint="@color/ColorPrimary"
            app:layout_constraintBottom_toTopOf="@+id/submitBtn"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/tv_forgotPasswordInfo"
            app:layout_constraintVertical_bias="1.0" />
    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.cardview.widget.CardView>

Rounded_framelayout.xml

<solid android:color="#FFFFFF"/>


<padding android:left="2dp"
    android:top="2dp"
    android:right="2dp"
    android:bottom="2dp"/>

<corners android:radius="20dp" />

解决方法

试试这个：

class your_kotlin_filename :DialogFragment() {

override fun onCreateView(inflater: LayoutInflater,container: ViewGroup?,savedInstanceState: Bundle?): View? {
    dialog!!.window?.setBackgroundDrawableResource(R.drawable.Rounded_framelayout);
    return inflater.inflate(R.layout.dialog_forgot_password,container,false)
}

override fun onViewCreated(view: View,savedInstanceState: Bundle?) {
    super.onViewCreated(view,savedInstanceState)
............your code for forget password...........
}



 override fun onStart() {
    super.onStart()
    val width = (resources.displayMetrics.widthPixels * 0.95).toInt()
    val height = (resources.displayMetrics.heightPixels * 0.43).toInt()
    dialog!!.window?.setLayout(width,height)
    dialog!!.setCanceledOnTouchOutside(true)
}

,

请查看 this 指南以了解如何自定义对话框。

简而言之，您需要像平常一样创建一个对话框，但在显示之前设置背景资源：

val builder = AlertDialog.Builder(context)
builder.setView(R.layout.item_dialog)
val dialog = builder.create()
dialog.window?.decorView?.setBackgroundResource(R.drawable.dialog_background) // setting the background
dialog.show()

其中 dialog_background 的定义如下：

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <corners android:radius="16dp" />
    <solid android:color="?android:colorBackground" />
</shape>