Android布局

2024-06-16 10:04| 来源: 网络整理| 查看: 265

提出问题：在水滴屏Android手机上如何实现全屏展示。

探究发现： 1、ViewGroup.LayoutParams（官网解释，Summary）该类继承自java.lang.Object。该类的属性很少，因为只有三个变量和三个int型常量，如下表所示。它还有三个不同的构造函数，其中包含一个copy构造函数。

常量FILL_PARENT、MATCH_PARENT、WRAP_PARENT变量height、width、layoutAnimationParameters

2、WindowManager.LayoutParams（官网解释）该类直接继承ViewGroup.LayoutParams，并且实现了接口Parcelable。它的内容比它的父类多了很多。它的属性中有大量的常量（所以，单独将这些常量拿到一篇博客中，点击此处可以浏览这些常量）。关于布局的常量见下面所示。

int FLAGS_CHANGEDint FLAG_FULLSCREEN This constant was deprecated in API level R. Use WindowInsetsController#hide(int) with Type#statusBars() instead. 最新的Android 11建议废弃这个常量。 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 SOFT_INPUT_ADJUST_RESIZE for the window’s softInputMode field; the window will stay fullscreen and will not resize. 窗口标志：显示此窗口时隐藏所有屏幕装饰（如状态栏）。这允许窗口为自己使用整个显示空间——当设置了此标志的应用程序窗口位于顶层时，状态栏将被隐藏。全屏窗口将忽略窗口的softInputMode字段的SOFT_INPUT_ADJUST_RESIZE值；窗口将保持全屏，并且不会调整大小。int FLAG_LAYOUT_NO_LIMITS Window flag: allow window to extend outside of the screen. 窗口标志：允许窗口扩展到屏幕之外。 int LAYOUT_CHANGEDint LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS The window is always allowed to extend into the DisplayCutout areas on the all edges of the screen. 窗口总是可以扩展到屏幕所有边缘上的显示剪切区域。int LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT The window is allowed to extend into the DisplayCutout area, only if the DisplayCutout is fully contained within a system bar. 仅当系统栏中完全包含DisplayCutout时，才允许窗口扩展到DisplayCutout区域。int LAYOUT_IN_DISPLAY_CUTOUT_MODE_NEVER The window is never allowed to overlap with the DisplayCutout area. 窗口永远不允许与显示剪切区重叠。int LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES The window is always allowed to extend into the DisplayCutout areas on the short edges of the screen. 窗口总是可以延伸到屏幕短边上的显示剪切区域。

变量：

public int flags Various behavioral options/flags.public int layoutInDisplayCutoutMode Controls how the window is laid out if there is a DisplayCutout.public int systemUiVisibility This field was deprecated in API level R. SystemUiVisibility flags are deprecated. Use WindowInsetsController instead.

3、如何将参数设置到目的对象因为调用Activity.getWindow()方法可以返回一个Window对象，进而通过Window.getAttributes()方法可以获得WindowManager.LayoutParams对象。

//某个Avtivity的onCreate方法中 WindowManager.LayoutParams layoutParams = getWindow().getAttributes();

解决方案：

public static void fullScreen(final Activity activity, final boolean enable) { if(activity == null){ return; } Window window = activity.getWindow(); WindowManager.LayoutParams layoutParams = window.getAttributes(); if (enable) { layoutParams.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES; layoutParams.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN; window.addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS); } else { layoutParams.layoutInDisplayCutoutMode = WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_DEFAULT; layoutParams.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN); window.clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS); } window.setAttributes(layoutParams); }

感谢微博有个小男神 https://blog.csdn.net/qq912098812/article/details/77369872

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Android布局

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