webview全屏不显示全屏视频

// 启用JavaScript和DOM存储
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);

// 在HTML页面中嵌入视频
webView.loadData("<video src='video_url' controls></video>", "text/html", "utf-8");

// 监听全屏按钮点击事件
fullscreenButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        // 请求全屏播放
        webView.evaluateJavascript("document.getElementsByTagName('video')[0].requestFullscreen();", null);
    }
});

// 设置WebChromeClient并重写onShowCustomView()和onHideCustomView()方法
webView.setWebChromeClient(new WebChromeClient() {
    @Override
    public void onShowCustomView(View view, CustomViewCallback callback) {
        super.onShowCustomView(view, callback);
        // 显示全屏视频
        fullscreenLayout.addView(view);
        fullscreenLayout.setVisibility(View.VISIBLE);
        setFullscreen(true);
    }

    @Override
    public void onHideCustomView() {
        super.onHideCustomView();
        // 隐藏全屏视频
        fullscreenLayout.removeAllViews();
        fullscreenLayout.setVisibility(View.GONE);
        setFullscreen(false);
    }
});