Android通过Dialog实现全屏的示例代码

private var fullscreenDialog: Dialog? = null

/**
 * 初始化全屏播放的Dialog
 */
private fun initFullScreenDialog() {
    fullscreenDialog = object : Dialog(requireActivity(), android.R.style.Theme_Black_NoTitleBar_Fullscreen) {
        @Deprecated("Deprecated in Java")
        override fun onBackPressed() {
             Log.d(TAG,"close fullscreen")
             toggleFullscreen()
            //super.onBackPressed()
        }

        override fun onCreate(savedInstanceState: Bundle?) {  
            super.onCreate(savedInstanceState)
            //一定要加这部分代码，可以实现全屏
            window?.decorView?.systemUiVisibility = (
                    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                            or View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                            or View.SYSTEM_UI_FLAG_FULLSCREEN)
        }
    }
}

@SuppressLint("SourceLockedOrientationActivity")
private fun openFullscreenDialog() {
    //旋转为横屏
    requireActivity().requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
    //从父View中移除需要全屏的View
    binding.clContainer.removeView(binding.fullscreenView)
    //将需要全屏的View添加到Dialog
    fullscreenDialog?.addContentView(
        binding.fullscreenView,
        ViewGroup.LayoutParams(
            ViewGroup.LayoutParams.MATCH_PARENT,
            ViewGroup.LayoutParams.MATCH_PARENT
        )
    )
    isFullscreen = true
    //显示Dialog
    fullscreenDialog?.show()
}


private fun closeFullscreenDialog() {
    //旋转为竖屏
    requireActivity().requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
    //(binding.exoPlayerView.parent.parent as ViewGroup).removeAllViews()
    //将View又重新添加回来
    binding.clContainer.addView(binding.fullscreenView)
    isFullscreen = false
    //退出Dialog
    fullscreenDialog?.dismiss()
}