无法获取android webview以打开android 9上的文件选择器

<application
    android:usesCleartextTraffic="true"
    ... >
    ...
</application>

// 在Activity中
public void openFileChooser() {
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
    startActivityForResult(Intent.createChooser(intent, "选择文件"), REQUEST_CODE);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
        if (data != null) {
            Uri uri = data.getData();
            // 处理选择的文件
        }
    }
}

WebView webView = findViewById(R.id.webview);
webView.setWebChromeClient(new WebChromeClient() {
    @Override
    public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
        openFileChooser();
        return true;
    }
});