用于备忘:
Android 4.4 Camera 源码里面有一个操作界面的方法:
/** * If {@param visible} is false, this hides the action bar and switches the * system UI to lights-out mode. If {@param hideLater} is true, a delayed message * will be sent after a timeout to hide the action bar. */ private void setSystemBarsVisibility(boolean visible, boolean hideLater) { mMainHandler.removeMessages(HIDE_ACTION_BAR); int currentSystemUIVisibility = mAboveFilmstripControlLayout.getSystemUiVisibility(); int newSystemUIVisibility = DEFAULT_SYSTEM_UI_VISIBILITY | (visible ? View.SYSTEM_UI_FLAG_VISIBLE : View.SYSTEM_UI_FLAG_LOW_PROFILE | View.SYSTEM_UI_FLAG_FULLSCREEN); if (newSystemUIVisibility != currentSystemUIVisibility) { mAboveFilmstripControlLayout.setSystemUiVisibility(newSystemUIVisibility); } boolean currentActionBarVisibility = mActionBar.isShowing(); if (visible != currentActionBarVisibility) { if (visible) { mActionBar.show(); } else { mActionBar.hide(); } if (mOnActionBarVisibilityListener != null) { mOnActionBarVisibilityListener.onActionBarVisibilityChanged(visible); } } // Now delay hiding the bars if (visible && hideLater) { mMainHandler.sendEmptyMessageDelayed(HIDE_ACTION_BAR, SHOW_ACTION_BAR_TIMEOUT_MS); } }
View类提供了setSystemUiVisibility和getSystemUiVisibility方法,这两个方法实现对状态栏的动态显示或隐藏的操作,以及获取状态栏当前可见性。
setSystemUiVisibility(int visibility)方法可传入的实参为:
1. View.SYSTEM_UI_FLAG_VISIBLE:显示状态栏,Activity不全屏显示(恢复到有状态的正常情况)。
2. View.INVISIBLE:隐藏状态栏,同时Activity会伸展全屏显示。
3. View.SYSTEM_UI_FLAG_FULLSCREEN:Activity全屏显示,且状态栏被隐藏覆盖掉。
4. View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN:Activity全屏显示,但状态栏不会被隐藏覆盖,状态栏依然可见,Activity顶端布局部分会被状态遮住。
5. View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION:效果同View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
6. View.SYSTEM_UI_LAYOUT_FLAGS:效果同View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
7. View.SYSTEM_UI_FLAG_HIDE_NAVIGATION:隐藏虚拟按键(导航栏)。有些手机会用虚拟按键来代替物理按键。
8. View.SYSTEM_UI_FLAG_LOW_PROFILE:状态栏显示处于低能显示状态(low profile模式),状态栏上一些图标显示会被隐藏。
参考:http://blog.csdn.net/stevenhu_223/article/details/12428591