Android 动态隐藏显示导航栏，状态栏

Talk is cheap, show me the code.

--Linus Torvalds

Okay, here:

一、导航栏：

	private void hideNavigationBar() {
		View decorView = getWindow().getDecorView();
		int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
				| View.SYSTEM_UI_FLAG_FULLSCREEN;
		decorView.setSystemUiVisibility(uiOptions);
	}

	private void showNavigationBar() {
		View decorView = getWindow().getDecorView();
		int uiOptions = View.SYSTEM_UI_FLAG_VISIBLE;
		decorView.setSystemUiVisibility(uiOptions);
	}

相关：

SYSTEM_UI_FLAG_VISIBLE——显示状态栏和导航栏

SYSTEM_UI_FLAG_LOW_PROFILE——此模式下，状态栏的图标可能是暗的

SYSTEM_UI_FLAG_HIDE_NAVIGATION——隐藏导航栏

SYSTEM_UI_FLAG_FULLSCREEN——全屏，隐藏状态栏和导航栏

SYSTEM_UI_FLAG_LAYOUT_STABLE

SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN——全屏，隐藏导航栏，状态栏浮在布局上。

SYSTEM_UI_FLAG_IMMERSIVE——沉浸式：半透明的状态栏和导航栏

SYSTEM_UI_FLAG_IMMERSIVE_STICKY——粘性沉浸式

二、状态栏：

	private void setStatusBarVisible(boolean show) {
		if (show) {
			int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
			uiFlags |= 0x00001000;
			getWindow().getDecorView().setSystemUiVisibility(uiFlags);
		} else {
			int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
					| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
					| View.SYSTEM_UI_FLAG_FULLSCREEN;
			uiFlags |= 0x00001000;
			getWindow().getDecorView().setSystemUiVisibility(uiFlags);
		}
	}

三、导航栏和状态栏

	private void setSystemUIVisible(boolean show) {
		if (show) {
			int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
			uiFlags |= 0x00001000;
			getWindow().getDecorView().setSystemUiVisibility(uiFlags);
		} else {
			int uiFlags = 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;
			uiFlags |= 0x00001000;
			getWindow().getDecorView().setSystemUiVisibility(uiFlags);
		}
	}