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一、支持网页视频播放

设置自定义WebChromeClient，覆写 onShowCustomView 、onHideCustomView，将WebChromeClient提供的 view 添加到布局中即可。

webChromeClient = object : WebChromeClient() {
    override fun onShowCustomView(view: View?, callback: CustomViewCallback?) {
        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
        mViewBinding.flVideoContainer.run {
            visibility = View.VISIBLE
            addView(view)
        }
    }

    override fun onHideCustomView() {
        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_SENSOR
        mViewBinding.flVideoContainer.run {
            visibility = View.GONE
            removeAllViews()
        }
    }
}

            try {
                WindowManager manager = getWindowManager();
                Field mGlobal_field = manager.getClass().getDeclaredField("mGlobal");
                mGlobal_field.setAccessible(true);
                Object managerGlobal = mGlobal_field.get(manager);
                //noinspection ConstantConditions
                Field mViews_field = managerGlobal.getClass().getDeclaredField("mViews");
                mViews_field.setAccessible(true);
                //noinspection unchecked
                ArrayList<View> mViews = (ArrayList<View>) mViews_field.get(managerGlobal);
                //noinspection ConstantConditions
                View dialogDecorView = mViews.get(mViews.size() - 1);// TODO 这里需要做一下判断，是不是dialog的decorView
                WindowManager.LayoutParams params = (WindowManager.LayoutParams) dialogDecorView.getLayoutParams();
                params.gravity = Gravity.TOP;
                dialogDecorView.setLayoutParams(params);
                manager.removeView(dialogDecorView);
                manager.addView(dialogDecorView, params);
            } catch (Exception e) {
                e.printStackTrace();
            }