webview无法访问SD卡

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

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

WebChromeClient webChromeClient = new WebChromeClient() {
    @Override
    public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
        // 打开文件选择器
        Intent intent = fileChooserParams.createIntent();
        startActivityForResult(intent, FILE_CHOOSER_REQUEST_CODE);
        return true;
    }
};