我使用来自https://github.com/Q115/DelayedProgressDialog的DelayedProgressDialog，它与ProgressDialog相同，在必要时具有延迟的额外好处。

使用它类似于Android O之前的ProgressDialog:

DelayedProgressDialog progressDialog = new DelayedProgressDialog();
progressDialog.show(getSupportFragmentManager(), "tag");

Kotlin和androidx DialogFragment的另一个解决方案

通过使用DialogFragment，你不必每次都在需要显示对话框的每个屏幕上调整窗口的大小，我认为这是一个更干净的解决方案

创建对话框类

class BaseProgressDialog : DialogFragment() {

    companion object {
        const val DIALOG_TAG = "BaseProgressDialogFragment"
    }

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        return activity?.let {
            val builder = AlertDialog.Builder(it, R.style.MainAlertDialog)
            val inflater = requireActivity().layoutInflater
            val dialogView = inflater.inflate(R.layout.progress_dialog, null)

            builder.setView(dialogView)
            builder.create()
        } ?: throw IllegalStateException("Activity cannot be null")
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        dialog?.setCanceledOnTouchOutside(false)
        dialog?.setCancelable(false)
        return super.onCreateView(inflater, container, savedInstanceState)
    }

    override fun onResume() {
        super.onResume()
        val size = resources.getDimensionPixelSize(R.dimen.size_80dp)
        dialog?.window?.setLayout(size, size)
    }
}

在styles.xml中创建样式

<style name="MainAlertDialog" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="android:windowBackground">@drawable/bg_alert_dialog</item>
</style>

为对话框bg_alert_dialog.xml创建背景

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="?attr/colorSecondary"/>
    <corners android:radius="@dimen/radius_10dp" />
</shape>

为对话框progress_dialog.xml创建布局

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/bg_alert_dialog"
    android:gravity="center"
    android:orientation="vertical"
    android:padding="@dimen/padding_16dp">

    <com.google.android.material.progressindicator.CircularProgressIndicator
        android:layout_width="@dimen/size_40dp"
        android:layout_height="@dimen/size_40dp"
        android:indeterminate="true"
        app:indicatorColor="?attr/colorPrimary" />

</LinearLayout>

调用片段中的对话框

private var progressDialog = BaseProgressDialog()
activity?.let {
   progressDialog.show(it.supportFragmentManager, BaseProgressDialog.DIALOG_TAG)
}

这是它看起来的样子:

在进度对话框中，用户不能做任何工作。所有后台进程在进度对话框中停止。因此，建议使用进度条代替进度对话框。

这个类在API级别26中已弃用。ProgressDialog是一个模式 对话框，这会阻止用户与应用程序进行交互 使用这个类时，您应该使用一个进度指示器 ProgressBar，它可以嵌入到你的应用的UI中。另外, 您可以使用通知通知用户任务的进度。链接

因为谷歌新的UI标准，它在Android O被弃用了

下面是@Han建议的ProgressDialog类的kotlin版本

class ProgressDialog(context: Context) : Dialog(context) {
init {
    val view = View.inflate(context, R.layout.progress_dialog, null)
    setContentView(view)
    setCancelable(false)
    window?.setBackgroundDrawable(
        ColorDrawable(Color.TRANSPARENT)
    )
}

}

您不需要导入任何自定义库。

我更喜欢使用现代的AlertDialog，所以这是Kishan Donga在本页发布的伟大答案的Kotlin版本。

芬兰湾的科特林代码:

fun setProgressDialog(context:Context, message:String):AlertDialog {
    val llPadding = 30
    val ll = LinearLayout(context)
    ll.orientation = LinearLayout.HORIZONTAL
    ll.setPadding(llPadding, llPadding, llPadding, llPadding)
    ll.gravity = Gravity.CENTER
    var llParam = LinearLayout.LayoutParams(
                  LinearLayout.LayoutParams.WRAP_CONTENT,
                  LinearLayout.LayoutParams.WRAP_CONTENT)
    llParam.gravity = Gravity.CENTER
    ll.layoutParams = llParam

    val progressBar = ProgressBar(context)
    progressBar.isIndeterminate = true
    progressBar.setPadding(0, 0, llPadding, 0)
    progressBar.layoutParams = llParam

    llParam = LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                        ViewGroup.LayoutParams.WRAP_CONTENT)
    llParam.gravity = Gravity.CENTER
    val tvText = TextView(context)
    tvText.text = message
    tvText.setTextColor(Color.parseColor("#000000"))
    tvText.textSize = 20.toFloat()
    tvText.layoutParams = llParam

    ll.addView(progressBar)
    ll.addView(tvText)

    val builder = AlertDialog.Builder(context)
    builder.setCancelable(true)
    builder.setView(ll)

    val dialog = builder.create()
    val window = dialog.window
    if (window != null) {
        val layoutParams = WindowManager.LayoutParams()
        layoutParams.copyFrom(dialog.window?.attributes)
        layoutParams.width = LinearLayout.LayoutParams.WRAP_CONTENT
        layoutParams.height = LinearLayout.LayoutParams.WRAP_CONTENT
                dialog.window?.attributes = layoutParams
    }
    return dialog
}

用法:

val dialog = setProgressDialog(this, "Loading..")
dialog.show()

输出: