设置状态栏是否显示或者设置为透明的

全屏显示不透明：
// getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
全屏显示并透明：
		getWindow().requestFeature(Window.FEATURE_NO_TITLE);  
        if(VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {  
            Window window = getWindow();  
            window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS  
                    | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);  
            window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN  
                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  
                            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);  
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);  
            window.setStatusBarColor(Color.TRANSPARENT);  
            window.setNavigationBarColor(Color.TRANSPARENT);  
        }