Hướng dẫn triển khai Webview Android cho chăm sóc khách hàng đa kênh

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
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// Bật JavaScript
webView.settings.javaScriptEnabled = true

// Bật localStorage
webView.settings.domStorageEnabled = true

webView.webChromeClient = object : WebChromeClient() {
    override fun onShowFileChooser(
        webView: WebView,
        filePathCallback: ValueCallback<Array<Uri>>,
        fileChooserParams: FileChooserParams
    ): Boolean {
        println("onShowFileChooser")
        mUploadMessageAboveL = filePathCallback
        val intent = Intent(fileChooserParams.createIntent())
        intent.addCategory(Intent.CATEGORY_OPENABLE)
        intent.type = "*/*"
        intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true) // Cho phép chọn nhiều tệp
        register.launch(Intent.createChooser(intent, "Chọn tệp"))

        return true
    }

    override fun onShowCustomView(view: View, callback: CustomViewCallback) {
        // Khi video yêu cầu toàn màn hình, hiển thị view tùy chỉnh
        if (customView != null) {
            callback.onCustomViewHidden()
            return
        }

        customView = view
        customViewContainer.visibility = View.VISIBLE
        customViewContainer.addView(customView)
        customViewCallback = callback
        webView.visibility = View.GONE
        customViewContainer.bringToFront()
    }

    override fun onHideCustomView() {
        // Khi thoát chế độ toàn màn hình, khôi phục view mặc định
        customView?.let {
            customViewContainer.removeView(it)
            customView = null
            customViewContainer.visibility = View.GONE
            customViewCallback?.onCustomViewHidden()
            webView.visibility = View.VISIBLE
        }
    }

    override fun getDefaultVideoPoster(): Bitmap {
        return Bitmap.createBitmap(50, 50, Bitmap.Config.ARGB_8888)
    }
}