webview加载外部链接超级缓慢解决方案

private class InsideWebChromeClient extends WebChromeClient {
        private View mCustomView;
        private CustomViewCallback mCustomViewCallback;

        @Nullable
        @Override
        public View getVideoLoadingProgressView() {

            FrameLayout frameLayout = new FrameLayout(WebActivity.this);
            frameLayout.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
            return frameLayout;
            //            return super.getVideoLoadingProgressView();

        }

        @Override
        public void onShowCustomView(View view, CustomViewCallback callback) {
            super.onShowCustomView(view, callback);
            titlepart.setVisibility(View.GONE);
            setStatusBarVisibility(false);
            if (mCustomView != null) {
                callback.onCustomViewHidden();
                return;
            }
            mCustomView = view;
            web_container.addView(mCustomView);
            mCustomViewCallback = callback;
            wv_web.setVisibility(View.GONE);
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            hideBottomUIMenu(false);  //隐藏虚拟导航

        }

        public void onHideCustomView() {
            setStatusBarVisibility(true);
            titlepart.setVisibility(View.VISIBLE);
            wv_web.setVisibility(View.VISIBLE);
            if (mCustomView == null) {
                return;
            }
            mCustomView.setVisibility(View.GONE);
            web_container.removeView(mCustomView);
            mCustomViewCallback.onCustomViewHidden();
            mCustomView = null;
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            hideBottomUIMenu(true);  //显示虚拟导航
            super.onHideCustomView();
        }
    }

    @Override
    public void setRequestedOrientation(int requestedOrientation) {

        super.setRequestedOrientation(requestedOrientation);
    }

    /**
     * 隐藏虚拟导航
     */

    protected void hideBottomUIMenu(boolean isVis) {
        //隐藏虚拟按键，并且全屏
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB && Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
            titlepart.setVisibility(View.GONE);
            View v = this.getWindow().getDecorView();
            if (isVis) {
                v.setSystemUiVisibility(View.VISIBLE);
//                titlepart.setVisibility(View.VISIBLE);
                titlepart.setVisibility(View.GONE);
            } else {
                v.setSystemUiVisibility(View.GONE);
                titlepart.setVisibility(View.GONE);
                getTitleBarView().hideTitleBarView();
            }
        } else if (Build.VERSION.SDK_INT >= 19) {
            //for new api versions.
            View decorView = getWindow().getDecorView();
            int uiOptions = isVis ? View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    :
                    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_FULLSCREEN;

            decorView.setSystemUiVisibility(uiOptions);
        }
    }

/**
 * 设置状态栏是否可见
 */
private void setStatusBarVisibility(boolean visible) {
    int i = visible == true ? 0 : WindowManager.LayoutParams.FLAG_FULLSCREEN;
    getWindow().setFlags(i, WindowManager.LayoutParams.FLAG_FULLSCREEN);
}

主要是

setStatusBarVisibility(false);

去掉后发现展示超级慢，加上则解决！不知道为什么！