android 隐藏状态栏和导航栏

@Override    public void onWindowFocusChanged(boolean hasFocus) {        super.onWindowFocusChanged(hasFocus);        NavigationBarStatusBar(this,hasFocus);    }    /**     * 导航栏，状态栏隐藏     * @param activity     */    public void NavigationBarStatusBar(Activity activity, boolean hasFocus){//        if (hasFocus && Build.VERSION.SDK_INT >= 19) { //这个注释的能用，但是在多个页面需要隐藏导航栏时跳转会导致导航栏弹出//            View decorView = activity.getWindow().getDecorView();//            decorView.setSystemUiVisibility(//                    View.SYSTEM_UI_FLAG_LAYOUT_STABLE//                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION//                            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN//                            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION//                            | View.SYSTEM_UI_FLAG_FULLSCREEN//                            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);//        }        if (hasFocus && Build.VERSION.SDK_INT >= 19) {            int flag = View.SYSTEM_UI_FLAG_LAYOUT_STABLE                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN                    | SYSTEM_UI_FLAG_HIDE_NAVIGATION                    | View.SYSTEM_UI_FLAG_FULLSCREEN                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;            flag |= 0x00001000;            View decorView = activity.getWindow().getDecorView();            decorView.setSystemUiVisibility(                    flag);        }    }    /**     *     * @param activity 此方法可以实现隐藏导航栏，但是一旦点击屏幕，导航栏就会弹出，无法隐藏     * @param     */    public void setNavigationBar(Activity activity,int visible){        View decorView = activity.getWindow().getDecorView();        //显示NavigationBar        if (View.GONE == visible){            int option = SYSTEM_UI_FLAG_HIDE_NAVIGATION;            decorView.setSystemUiVisibility(option);        }    }

这个方法时官方demo中给的，以前没注意，用起来也没有问题。比较简洁，在适当方法中调用即可
view 可以用getWindow().getDecorView()替代

view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE                | View.SYSTEM_UI_FLAG_FULLSCREEN                | View.SYSTEM_UI_FLAG_LAYOUT_STABLE                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION                | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);

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