Kotlin 列表在 android WebView 中没有正确迭代

The problem you are facing is due to the fact that WebView's loadUrl() function operates asynchronously.
When you call loadUrl() in your forEach loop, it initiates the loading of the URL, but it does not wait for the page to finish loading before proceeding to the next URL.
Consequently, the loop quickly iterates over all the URLs and only the last URL has the chance to fully load, which is why you are only seeing the result of the last URL.

为了处理这个问题，您可以使用类似队列的方法，仅在当前URL加载完成后才加载下一个URL.

例如:

val items = mutableListOf(
    "https://translate.google.com/?sl=$from&tl=$into&text=First text&op=translate",
    "https://translate.google.com/?sl=$from&tl=$into&text=Second text&op=translate",
    "https://translate.google.com/?sl=$from&tl=$into&text=Third text&op=translate"
)

var isLoading = false

webView.webViewClient = object : WebViewClient() {
    override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
        super.onPageStarted(view, url, favicon)
        isLoading = true
    }

    override fun onPageFinished(view: WebView?, url: String?) {
        super.onPageFinished(view, url)
        isLoading = false
    }
}

val handler = Handler(Looper.getMainLooper())
val runnable = object : Runnable {
    override fun run() {
        if (!isLoading && items.isNotEmpty()) {
            val nextUrl = items.removeAt(0)
            webView.loadUrl(nextUrl)
            injectJavascript(webView)
        }
        handler.postDelayed(this, 5000)
    }
}
handler.post(runnable)

在这一修订后的准则中:

Here, onPageStarted and onPageFinished are used to maintain a flag isLoading that indicates whether the WebView is currently loading a page or not.
The runnable object checks this flag, and if the WebView is not currently loading a page, it starts loading the next URL. This runnable object is posted to a Handler every 5 seconds.

这样，只有当WebView当前未加载页面时，才会加载下一个URL.