如何使用Kotlin在Android Studio中使用WebView阅读pdf文件？

dependencies {
    ...
    implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.5.21'
}

import android.os.Bundle
import android.webkit.WebView
import android.webkit.WebViewClient

class MainActivity : AppCompatActivity() {
    private lateinit var webView: WebView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        webView = findViewById(R.id.webView)
        webView.settings.javaScriptEnabled = true
        webView.webViewClient = WebViewClient()
    }
}

<WebView
    android:id="@+id/webView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<uses-permission android:name="android.permission.INTERNET" />

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    webView = findViewById(R.id.webView)
    webView.settings.javaScriptEnabled = true
    webView.webViewClient = WebViewClient()

    val pdfUrl = "https://example.com/sample.pdf" // 替换为实际的PDF文件URL或本地路径
    webView.loadUrl("https://docs.google.com/gview?embedded=true&url=$pdfUrl")
}