android隐藏状态,android控件隐藏和显示
Android 完全隐藏状态栏方法
Android 完全隐藏状态栏方法
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1. 隐藏ActionBar：
ActionBar actionBar = getActionBar();
if (actionBar != null) {
actionBar.hide();
}
如果是继承AppCompatActivity，就用getSupportActionBar()。
2. 隐藏状态栏
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
通过这两个步就可以全屏显示启动页了。
然而，当开始动态申请权限，弹出系统的权限提示对话框后，状态栏又重新露出来了。我日，不是隐藏了吗？怎么又出来了，什么鬼？
通过查看源码的解释：
/**
* Request that the visibility of the status bar or other screen/window
* decorations be changed.
*
* pThis method is used to put the over device UI into temporary modes
* where the user's attention is focused more on the application content,
* by dimming or hiding surrounding system affordances. This is typically
* used in conjunction with {@link Window#FEATURE_ACTION_BAR_OVERLAY
* Window.FEATURE_ACTION_BAR_OVERLAY}, allowing the applications content
* to be placed behind the action bar (and with these flags other system
* affordances) so that smooth transitions between hiding and showing them
* can be done.
*
* pTwo representative examples of the use of system UI visibility is
* implementing a content browsing application (like a magazine reader)
* and a video playing application.
*
* pThe first code shows a typical implementation of a View in a content
* browsing application. In this implementation, the application goes
* into a content-oriented mode by hiding the status bar and action bar,
* and putting the navigation elements into lights out mode. The user can
* then interact with content while in this mode. Such an application should
* provide an easy way for the user to toggle out of the mode (such as to
* check information in the status bar or access notifications). In the
* implementation here, this is done simply by tapping on the content.
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java
* content}
*
* pThis second code sample shows a typical implementation of a View
* in a video playing application. In this situation, while the video is
* playing the application would like to go into a complete full-screen mode,
* to use as much of the display as possible for the video. When in this state
* the user can not interact with the application; the system intercepts
* touching on the screen to pop the UI out of full screen mode. See
* {@link #fitSystemWindows(Rect)} for a sample layout that goes with this code.
*
* {@sample development/samples/ApiDemos/src/com/example/android/apis/view/VideoPlayerActivity.java
* content}
*
* @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE},
* {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN},
* {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION},
* {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE},
* and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}.
*/
从释义上可以知道，setSystemUiVisibility()是用于使系统UI进入一种临时的模式，目的是使用户的注意力关注于应用程序的内容上。所以单独一个Activity这样设置是可以全屏显示的，这个只对当前的Activity有效。可是当申请系统权限使，弹出的对话框是系统的Activity，通过adb shell dumpsys activity 来看，当前最顶端的Activity已经是GrantPermissionsActivity。
Run #2: ActivityRecord{2b99111 u0 com.google.android.packageinstaller/com.android.packageinstaller.permission.ui.GrantPermissionsActivity t141}
而这个GrantPermissionsActivity，我们并无法去设置它的setSystemUiVisibility()。所以这种方法不奏效。
通过和同事讨论，后来找到一种方法，可以实现我们的需求。
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
这种方法是OK的。
它的源码释义是：
/**
* Set the flags of the window, as per the
* {@link WindowManager.LayoutParams WindowManager.LayoutParams}
* flags.
*
* pNote that some flags must be set before the window decoration is
* created (by the first call to
* {@link #setContentView(View, android.view.ViewGroup.LayoutParams)} or
* {@link #getDecorView()}:
* {@link WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN} and
* {@link WindowManager.LayoutParams#FLAG_LAYOUT_INSET_DECOR}. These
* will be set for you based on the {@link android.R.attr#windowIsFloating}
* attribute.
*
* @param flags The new window flags (see WindowManager.LayoutParams).
* @param mask Which of the window flag bits to modify.
* @see #addFlags
* @see #clearFlags
*/
public void setFlags(int flags, int mask) {}
仔细分析发现，这个是设置整个当前Window的，而setSystemUiVisibility()聚焦于显示Activity内容的，还是有差别的。
/**
* Window flag: hide all screen decorations (such as the status bar) while
* this window is displayed. This allows the window to use the entire
* display space for itself -- the status bar will be hidden when
* an app window with this flag set is on the top layer. A fullscreen window
* will ignore a value of {@link #SOFT_INPUT_ADJUST_RESIZE} for the window's
* {@link #softInputMode} field; the window will stay fullscreen
* and will not resize.
*
* pThis flag can be controlled in your theme through the
* {@link android.R.attr#windowFullscreen} attribute; this attribute
* is automatically set for you in the standard fullscreen themes
* such as {@link android.R.style#Theme_NoTitleBar_Fullscreen},
* {@link android.R.style#Theme_Black_NoTitleBar_Fullscreen},
* {@link android.R.style#Theme_Light_NoTitleBar_Fullscreen},
* {@link android.R.style#Theme_Holo_NoActionBar_Fullscreen},
* {@link android.R.style#Theme_Holo_Light_NoActionBar_Fullscreen},
* {@link android.R.style#Theme_DeviceDefault_NoActionBar_Fullscreen}, and
* {@link android.R.style#Theme_DeviceDefault_Light_NoActionBar_Fullscreen}./p
*/
public static final int FLAG_FULLSCREEN = 0x00000400;
从释义上得知，设置这个flag可以隐藏所有的屏幕修饰，像status bar，用于Window使用整个显示屏。这个完全是我们的目的了。
安卓11小窗模式下隐藏状态栏
单击右键就可以了。
首先你在任务栏上单击右键把锁定状态栏前面的对号去掉，再用鼠标放在状态栏上当鼠标变成上下箭头时，把状态栏拖到最下面。这样就看不到状态栏了。
状态栏是包含文本输出窗格或“指示器”的控制条。输出窗格通常用作消息行和状态指示器。消息行示例包括命令帮助消息行，它简要解释了“MFC应用程序向导”所创建的默认状态栏的最左边窗格中选定的菜单或工具栏命令。
Android 隐藏状态栏、标题栏、透明状态栏的几种方式
不管是继承AppCompatActivity还是Activity都适用：
在style.xml定义
在AndroidManifest.xml里面设置下theme属性：
1.在style.xml定义
2.在AndroidManifest.xml里面设置下theme属性
Android 显示、隐藏状态栏和导航栏
Android 显示、隐藏状态栏和导航栏
控制状态栏显示，Activity的主题中配置全屏属性
控制状态栏显示，在setContentView之前设置全屏的flag
控制状态栏显示，在任何位置通过添加和移除全屏的flag
控制状态栏和导航栏显示，setSystemUiVisibility
// 全屏展示
// 非全屏显示，显示状态栏和导航栏
Android去除状态栏的方法汇总
一、隐藏标题栏
//隐藏标题栏
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
二、隐藏状态栏
//隐藏状态栏
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
三、去掉所有Activity界面的标题栏
修改AndroidManifest.xml
在application 标签中添加android:theme="@android:style/Theme.NoTitleBar"
四、去掉所有Activity界面的TitleBar 和StatusBar
修改AndroidManifest.xml
在application 标签中添加
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
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