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  • WindowManager.LayoutParams全解

    WindowManager是Android中一个重要的服务(Service )。WindowManager Service 是全局的,是唯一的。它将用户的操作,翻译成为指令,发送给呈现在界面上的各个Window。Activity会将顶级的控件注册到 Window Manager 中,
    当用户真是触碰屏幕或键盘的时候,Window Manager就会通知到,而当控件有一些请求产生,也会经由ViewParent送回到Window Manager中。从而完成整个通信流程。
    整个Android的窗口机制是基于一个叫做 WindowManager,这个接口可以添加view到屏幕,也可以从屏幕删除view。它面向的对象一端是屏幕,另一端就是View,通过WindowManager的 addView方法创建View,这样产生出来的View根据
    WindowManager.LayoutParams属性不同,效果也就不同了。比如创建 系统顶级窗口,实现悬浮窗口效果!WindowManager的方法很简单,基本用到的就三addView,removeView,updateViewLayout。接口,而WindowManager.LayoutParams的属性就多了,非常丰富,具体请查后面介绍

    怎么样获取windowManager实例呢,下面我们就通过一个小的例子来说明以下:

     1 Button bb=new Button(getApplicationContext());
     2     WindowManager wmManager=(WindowManager) getSystemService(Context.WINDOW_SERVICE);
     3     WindowManager.LayoutParams wmParams = new WindowManager.LayoutParams();
     4     /**
     5          *以下都是WindowManager.LayoutParams的相关属性
     6          * 具体用途请参考SDK文档
     7          */
     8         wmParams.type=2002;   //这里是关键,你也可以试试2003
     9         wmParams.format=1;
    10          /**
    11          *这里的flags也很关键
    12          *代码实际是wmParams.flags |= FLAG_NOT_FOCUSABLE;
    13          *40的由来是wmParams的默认属性(32)+ FLAG_NOT_FOCUSABLE(8)
    14          */
    15         wmParams.flags=40;
    16         wmParams.width=40;
    17         wmParams.height=40;
    18         
    19         wmManager.addView(bb, wmParams);  //创建View

    上面就是一个简单的例子,创建了一个Button对象然后通过WindowManager实例对象的addView添加这个ButtonVIew并根据相应的LayoutParams参数进行显示。

    WindowManager对象的一些接口说明:

    1)abstract Display  getDefaultDisplay();  //获取默认显示的 Display 对象。
    2)abstract void removeViewImmediate(View view);//是removeView(View) 的一个特殊扩展,在方法返回前能够立即调用该视图层次的View.onDetachedFromWindow() 方法。

    下面我们就重点介绍以下WindowManager接口的嵌套内部类LayoutParams。

    WindowManager.LayoutParams 是 WindowManager 接口的嵌套类;继承于 ViewGroup.LayoutParams 。它的内容十分丰富。其实WindowManager.java的主要内容就是由这个类定义构成。下面来分析一下这个类:

    定义 
    public static class WindowManager.LayoutParams 
    extends ViewGroup.LayoutParams implements Parcelable

    继承关系 
    java.lang.Object
       ↳android.view.ViewGroup.LayoutParams
           ↳android.view.WindowManager.LayoutParams

    继承来的属性与常量 
    从 ViewManager.LayoutParams 继承来的属性:
         android:layout_height
              Specifies the basic height of the view.

         android:layout_width
              Specifies the basic width of the view.

    从 ViewManager.LayoutParams继承的常量:
         FILL_PARENT
         WRAP_CONTENT
         MATCH_PARENT

    两个变量: 
    width
    height

    属性及可用的常量定义 
    1. public int x;
       如果忽略gravity属性,那么它表示窗口的绝对X位置。
       什么是gravity属性呢?简单地说,就是窗口如何停靠。
       当设置了 Gravity.LEFT 或 Gravity.RIGHT 之后,x值就表示到特定边的距离。
     
    2. public int y;
       如果忽略gravity属性,那么它表示窗口的绝对Y位置。
       当设置了 Gravity.TOP 或 Gravity.BOTTOM 之后,y值就表示到特定边的距离。
     
    3. public float horizontalWeight;
       public float verticalWeight;
       在纵/横向上,为关联的view预留了多少扩展空间(像素)。如果是0,那么此view不能被拉伸。
       其他情况下,扩展空间(像素)将被widget所均分。

    4. public int type;
        窗口类型。有3种主要类型:
        a)Applicationwindows:
            取值在 FIRST_APPLICATION_WINDOW 和 LAST_APPLICATION_WINDOW 之间。
            是通常的、顶层的应用程序窗口。必须将 token 设置成 activity 的 token 。
        b)Sub_windows:
            取值在 FIRST_SUB_WINDOW 和 LAST_SUB_WINDOW 之间。
            与顶层窗口相关联,token 必须设置为它所附着的宿主窗口的 token。
        c)Systemwindows:
            取值在 FIRST_SYSTEM_WINDOW 和 LAST_SYSTEM_WINDOW 之间。
            用于特定的系统功能。它不能用于应用程序,使用时需要特殊权限。

         下面定义了 type 的取值:

          应用程序窗口。
          public static final int FIRST_APPLICATION_WINDOW = 1;

          所有程序窗口的“基地”窗口,其他应用程序窗口都显示在它上面。     
          public static final int TYPE_BASE_APPLICATION   =1;       

          普通应哟功能程序窗口。token必须设置为Activity的token,以指出该窗口属谁。
          public static final int TYPE_APPLICATION       = 2;

          用于应用程序启动时所显示的窗口。应用本身不要使用这种类型。
          它用于让系统显示些信息,直到应用程序可以开启自己的窗口。   
          public static final int TYPE_APPLICATION_STARTING = 3;

          应用程序窗口结束。
          public static final int LAST_APPLICATION_WINDOW = 99;

          子窗口。子窗口的Z序和坐标空间都依赖于他们的宿主窗口。
          public static final int FIRST_SUB_WINDOW       = 1000;

          面板窗口,显示于宿主窗口上层。
          public static final int TYPE_APPLICATION_PANEL  = FIRST_SUB_WINDOW;

          媒体窗口,例如视频。显示于宿主窗口下层。
          public static final int TYPE_APPLICATION_MEDIA  = FIRST_SUB_WINDOW+1;

          应用程序窗口的子面板。显示于所有面板窗口的上层。(GUI的一般规律,越“子”越靠上)
          public static final int TYPE_APPLICATION_SUB_PANEL = FIRST_SUB_WINDOW +2;

          对话框。类似于面板窗口,绘制类似于顶层窗口,而不是宿主的子窗口。
          public static final int TYPE_APPLICATION_ATTACHED_DIALOG = FIRST_SUB_WINDOW +3;

          媒体信息。显示在媒体层和程序窗口之间,需要实现透明(半透明)效果。(例如显示字幕)
          public static final int TYPE_APPLICATION_MEDIA_OVERLAY  = FIRST_SUB_WINDOW +4;

          子窗口结束。( End of types of sub-windows )
          public static final int LAST_SUB_WINDOW        = 1999;

          系统窗口。非应用程序创建。
          public static final int FIRST_SYSTEM_WINDOW    = 2000;

          状态栏。只能有一个状态栏;它位于屏幕顶端,其他窗口都位于它下方。
          public static final int TYPE_STATUS_BAR        =  FIRST_SYSTEM_WINDOW;

          搜索栏。只能有一个搜索栏;它位于屏幕上方。
          public static final int TYPE_SEARCH_BAR        = FIRST_SYSTEM_WINDOW+1;

          电话窗口。它用于电话交互(特别是呼入)。它置于所有应用程序之上,状态栏之下。
          public static final int TYPE_PHONE            = FIRST_SYSTEM_WINDOW+2;

          系统提示。它总是出现在应用程序窗口之上。
          public static final int TYPE_SYSTEM_ALERT      =  FIRST_SYSTEM_WINDOW +3;

          锁屏窗口。
          public static final int TYPE_KEYGUARD          = FIRST_SYSTEM_WINDOW +4;

          信息窗口。用于显示toast。
          public static final int TYPE_TOAST            = FIRST_SYSTEM_WINDOW +5;

          系统顶层窗口。显示在其他一切内容之上。此窗口不能获得输入焦点,否则影响锁屏。
          public static final int TYPE_SYSTEM_OVERLAY    =  FIRST_SYSTEM_WINDOW +6;

          电话优先,当锁屏时显示。此窗口不能获得输入焦点,否则影响锁屏。
          public static final int TYPE_PRIORITY_PHONE    =  FIRST_SYSTEM_WINDOW +7;

          系统对话框。(例如音量调节框)。
          public static final int TYPE_SYSTEM_DIALOG     =  FIRST_SYSTEM_WINDOW +8;

          锁屏时显示的对话框。
          public static final int TYPE_KEYGUARD_DIALOG   =  FIRST_SYSTEM_WINDOW +9;

          系统内部错误提示,显示于所有内容之上。
          public static final int TYPE_SYSTEM_ERROR      =  FIRST_SYSTEM_WINDOW +10;

          内部输入法窗口,显示于普通UI之上。应用程序可重新布局以免被此窗口覆盖。
          public static final int TYPE_INPUT_METHOD      =  FIRST_SYSTEM_WINDOW +11;

          内部输入法对话框,显示于当前输入法窗口之上。
          public static final int TYPE_INPUT_METHOD_DIALOG= FIRST_SYSTEM_WINDOW +12;

          墙纸窗口。
          public static final int TYPE_WALLPAPER         = FIRST_SYSTEM_WINDOW +13;

          状态栏的滑动面板。
          public static final int TYPE_STATUS_BAR_PANEL   = FIRST_SYSTEM_WINDOW +14;

          系统窗口结束。
          public static final int LAST_SYSTEM_WINDOW     = 2999;

    5. public int memoryType;
       指出窗口所使用的内存缓冲类型。默认为 NORMAL 。

       下面定义了 memoryType 的取值:
          窗口缓冲位于主内存。
          public static final int MEMORY_TYPE_NORMAL = 0;

          窗口缓冲位于可以被DMA访问,或者硬件加速的内存区域。
          public static final int MEMORY_TYPE_HARDWARE = 1;

          窗口缓冲位于可被图形加速器访问的区域。
          public static final int MEMORY_TYPE_GPU = 2;

          窗口缓冲不拥有自己的缓冲区,不能被锁定。缓冲区由本地方法提供。
          public static final int MEMORY_TYPE_PUSH_BUFFERS = 3;

    6.  public int flags;
         行为选项/旗标,默认为 none .

        下面定义了 flags 的取值:
          窗口之后的内容变暗。
          public static final int FLAG_DIM_BEHIND       = 0x00000002;

          窗口之后的内容变模糊。
          public static final int FLAG_BLUR_BEHIND       = 0x00000004;

          不许获得焦点。
          public static final int FLAG_NOT_FOCUSABLE     = 0x00000008;

          不接受触摸屏事件。
          public static final int FLAG_NOT_TOUCHABLE     = 0x00000010;

          当窗口可以获得焦点(没有设置 FLAG_NOT_FOCUSALBE 选项)时,仍然将窗口范围之外的点设备事件(鼠标、触摸屏)发送给后面的窗口处理。否则它将独占所有的点设备事件,而不管它们是不是发生在窗口范围内。
          public static final int FLAG_NOT_TOUCH_MODAL   = 0x00000020;

          如果设置了这个标志,当设备休眠时,点击触摸屏,设备将收到这个第一触摸事件。
          通常第一触摸事件被系统所消耗,用户不会看到他们点击屏幕有什么反应。
          public static final int FLAG_TOUCHABLE_WHEN_WAKING = 0x00000040;

          当此窗口为用户可见时,保持设备常开,并保持亮度不变。
          public static final int FLAG_KEEP_SCREEN_ON    = 0x00000080;

          窗口占满整个屏幕,忽略周围的装饰边框(例如状态栏)。此窗口需考虑到装饰边框的内容。
          public static final int FLAG_LAYOUT_IN_SCREEN   =0x00000100;

          允许窗口扩展到屏幕之外。
          public static final int FLAG_LAYOUT_NO_LIMITS   =0x00000200;

          窗口显示时,隐藏所有的屏幕装饰(例如状态条)。使窗口占用整个显示区域。
          public static final int FLAG_FULLSCREEN     = 0x00000400;

          此选项将覆盖FLAG_FULLSCREEN选项,并强制屏幕装饰(如状态条)弹出。
          public static final int FLAG_FORCE_NOT_FULLSCREEN   =0x00000800;

          抖动。指 对半透明的显示方法。又称“点透”。图形处理较差的设备往往用“点透”替代Alpha混合。
          public static final int FLAG_DITHER           = 0x00001000;

          不允许屏幕截图。
          public static final int FLAG_SECURE           = 0x00002000;

          一种特殊模式,布局参数用于指示显示比例。
          public static final int FLAG_SCALED           = 0x00004000;

          当屏幕有可能贴着脸时,这一选项可防止面颊对屏幕造成误操作。
          public static final int FLAG_IGNORE_CHEEK_PRESSES   = 0x00008000;

          当请求布局时,你的窗口可能出现在状态栏的上面或下面,从而造成遮挡。当设置这一选项后,窗口管理器将确保窗口内容不会被装饰条(状态栏)盖住。
          public static final int FLAG_LAYOUT_INSET_DECOR = 0x00010000;

          反转FLAG_NOT_FOCUSABLE选项。
          如果同时设置了FLAG_NOT_FOCUSABLE选项和本选项,窗口将能够与输入法交互,允许输入法窗口覆盖;
          如果FLAG_NOT_FOCUSABLE没有设置而设置了本选项,窗口不能与输入法交互,可以覆盖输入法窗口。
          public static final int FLAG_ALT_FOCUSABLE_IM = 0x00020000;

          如果你设置了FLAG_NOT_TOUCH_MODAL,那么当触屏事件发生在窗口之外事,可以通过设置此标志接收到一个 MotionEvent.ACTION_OUTSIDE事件。注意,你不会收到完整的down/move/up事件,只有第一次down事件时可以收到 ACTION_OUTSIDE。
          public static final int FLAG_WATCH_OUTSIDE_TOUCH = 0x00040000;

          当屏幕锁定时,窗口可以被看到。这使得应用程序窗口优先于锁屏界面。可配合FLAG_KEEP_SCREEN_ON选项点亮屏幕并直接显示在锁屏界面之前。可使用FLAG_DISMISS_KEYGUARD选项直接解除非加锁的锁屏状态。此选项只用于最顶层的全屏幕窗口。
          public static final int FLAG_SHOW_WHEN_LOCKED = 0x00080000;

          请求系统墙纸显示在你的窗口后面。窗口必须是半透明的。
          public static final int FLAG_SHOW_WALLPAPER = 0x00100000;

          窗口一旦显示出来,系统将点亮屏幕,正如用户唤醒设备那样。
          public static final int FLAG_TURN_SCREEN_ON = 0x00200000;

          解除锁屏。只有锁屏界面不是加密的才能解锁。如果锁屏界面是加密的,那么用户解锁之后才能看到此窗口,除非设置了FLAG_SHOW_WHEN_LOCKED选项。
          public static final int FLAG_DISMISS_KEYGUARD = 0x00400000;

          锁屏界面淡出时,继续运行它的动画。
          public static final int FLAG_KEEP_SURFACE_WHILE_ANIMATING =0x10000000;

          以原始尺寸显示窗口。用于在兼容模式下运行程序。
          public static final int FLAG_COMPATIBLE_WINDOW = 0x20000000;

          用于系统对话框。设置此选项的窗口将无条件获得焦点。
          public static final int FLAG_SYSTEM_ERROR = 0x40000000;

    7. public int softInputMode;
       软输入法模式选项:

       以下选项与 softInputMode 有关:
          软输入区域是否可见。
          public static final int SOFT_INPUT_MASK_STATE = 0x0f;

          未指定状态。
          public static final int SOFT_INPUT_STATE_UNSPECIFIED = 0;

          不要修改软输入法区域的状态。
          public static final int SOFT_INPUT_STATE_UNCHANGED = 1;

          隐藏输入法区域(当用户进入窗口时)。
          public static final int SOFT_INPUT_STATE_HIDDEN = 2;

          当窗口获得焦点时,隐藏输入法区域。
          public static final int SOFT_INPUT_STATE_ALWAYS_HIDDEN = 3;

          显示输入法区域(当用户进入窗口时)。
          public static final int SOFT_INPUT_STATE_VISIBLE = 4;

          当窗口获得焦点时,显示输入法区域。
          public static final int SOFT_INPUT_STATE_ALWAYS_VISIBLE = 5;

          窗口应当主动调整,以适应软输入窗口。
          public static final int SOFT_INPUT_MASK_ADJUST = 0xf0;

          未指定状态,系统将根据窗口内容尝试选择一个输入法样式。
          public static final int SOFT_INPUT_ADJUST_UNSPECIFIED = 0x00;

          当输入法显示时,允许窗口重新计算尺寸,使内容不被输入法所覆盖。
          不可与SOFT_INPUT_ADJUSP_PAN混合使用,如果两个都没有设置,系统将根据窗口内容自动设置一个选项。
          public static final int SOFT_INPUT_ADJUST_RESIZE = 0x10;

          输入法显示时平移窗口。它不需要处理尺寸变化,框架能够移动窗口以确保输入焦点可见。
          不可与SOFT_INPUT_ADJUST_RESIZE混合使用;如果两个都没设置,系统将根据窗口内容自动设置一个选项。
          public static final int SOFT_INPUT_ADJUST_PAN = 0x20;

          当用户转至此窗口时,由系统自动设置,所以你不要设置它。
          当窗口显示之后该标志自动清除。
          public static final int SOFT_INPUT_IS_FORWARD_NAVIGATION = 0x100;

    8. public int gravity;
       gravity 属性。什么是gravity属性呢?简单地说,就是窗口如何停靠。

    9. public float horizontalMargin;
       水平边距,容器与widget之间的距离,占容器宽度的百分率。

    10. public float verticalMargin;
        纵向边距。

    11. public int format;
        期望的位图格式。默认为不透明。参考android.graphics.PixelFormat。

    12. public int windowAnimations;
        窗口所使用的动画设置。它必须是一个系统资源而不是应用程序资源,因为窗口管理器不能访问应用程序。

    13. public float alpha = 1.0f;
        整个窗口的半透明值,1.0表示不透明,0.0表示全透明。

    14. public float dimAmount = 1.0f;
        当FLAG_DIM_BEHIND设置后生效。该变量指示后面的窗口变暗的程度。1.0表示完全不透明,0.0表示没有变暗。

    15. public float screenBrightness = -1.0f;
        用来覆盖用户设置的屏幕亮度。表示应用用户设置的屏幕亮度。从0到1调整亮度从暗到最亮发生变化。

    16. public IBinder token = null;
        窗口的标示符。( Identifier for this window. This will usually be filled in for you. )

    17. public String packageName = null;
        此窗口所在的包名。

    18. public int screenOrientation =ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
        屏幕方向,参见android.content.pm.ActivityInfo#screenOrientation。

    19. 在兼容模式下,备份/恢复参数所使用的内部缓冲区。
        public int[] mCompatibilityParamsBackup = null;

    常用方法 
    1. public final int copyFrom (WindowManager.LayoutParams o);
       下面定义了各种“CHANGE”信息,为copyFrom函数所使用。
        public staticfinal int LAYOUT_CHANGED =1<<0;
        public staticfinal int TYPE_CHANGED =1<<1;
        public staticfinal int FLAGS_CHANGED =1<<2;
        public staticfinal int FORMAT_CHANGED =1<<3;
        public staticfinal int ANIMATION_CHANGED =1<<4;
        public staticfinal int DIM_AMOUNT_CHANGED =1<<5;
        public staticfinal int TITLE_CHANGED =1<<6;
        public staticfinal int ALPHA_CHANGED =1<<7;
        public staticfinal int MEMORY_TYPE_CHANGED =1<<8;
        public staticfinal int SOFT_INPUT_MODE_CHANGED =1<<9;
        public staticfinal int SCREEN_ORIENTATION_CHANGED =1<<10;
        public staticfinal int SCREEN_BRIGHTNESS_CHANGED =1<<11;

     
     
    public static class

    WindowManager.LayoutParams

    extends ViewGroup.LayoutParams
    implements Parcelable
    java.lang.Object
       ? android.view.ViewGroup.LayoutParams
         ? android.view.WindowManager.LayoutParams
     WindowManager.LayoutParams 是 WindowManager 接口的嵌套类;它继承于 ViewGroup.LayoutParams; 它用于向WindowManager描述Window的管理策略。
    主要成员常量
    Window flag系列
    该系列主要用于对Window的flag进行设置。设置Window的flag,可以直接对Window的getAttributes()得到其 WindowManager.LayoutParams对象,然后直接对它flag变量操作。也可以Window的addFlags(int flags)方法,setFlags(int flags, int mask)方法,clearFlags(int flags)方法进行操作。
    比如设置全屏:
     Window window = getWindow(); 
     WindowManager.LayoutParams winParams = win.getAttributes();
     winParams.flags=winParams.flags|WindowManager.LayoutParams.FLAG_FULLSCREEN;
     或
     window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
     或
     window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 
     取消全屏
     Window window = getWindow(); 
     winParams.flags=winParams.flags&~WindowManager.LayoutParams.FLAG_FULLSCREEN;
     或
     window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
     或
    window.setFlags(0, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    所有Window flag如下:
    int FLAGS_CHANGED 用于表示flags发生了变化,关于此的详细内容请看后文。
    int FLAG_ALLOW_LOCK_WHILE_SCREEN_ON Window flag: as long as this window is visible to the user, allow the lock screen to activate while the screen is on.
    当该window对用户可见的时候,允许锁屏。
    int FLAG_ALT_FOCUSABLE_IM Window flag: invert the state of FLAG_NOT_FOCUSABLE with respect to how this window interacts with the current method.
    int FLAG_BLUR_BEHIND Window flag: blur everything behind this window.
    让该window后所有东西都模糊(blur)
    int FLAG_DIM_BEHIND Window flag: everything behind this window will be dimmed.
    让该window后所有的东西都成暗淡(dim)
    int FLAG_DISMISS_KEYGUARD Window flag: when set the window will cause the keyguard to be dismissed, 
    only if it is not a secure lock keyguard.
    int FLAG_DITHER Window flag: turn on dithering when compositing this window to the screen.
    开启抖动(dithering)
    int FLAG_FORCE_NOT_FULLSCREEN Window flag: Override {@link #FLAG_FULLSCREEN and force the screen decorations (such as status bar) to be shown.
    恢复window非全屏显示  (让背景不是暗淡的)
    int FLAG_FULLSCREEN Window flag: Hide all screen decorations (e.g.
    让window进行全屏显示
    int FLAG_HARDWARE_ACCELERATED

    Indicates whether this window should be hardware accelerated.

    对该window进行硬件加速.

    该flag必须在设置你的Activity或Dialog的Content View之前进行设置,

    而且如果你在mainfest文件中用android:hardwareAccelerated开启了该属性的话,那么你在程序中就不能再改变它。mainfest文件中android:hardwareAccelerated属性默认是开启的("true")。

    int FLAG_IGNORE_CHEEK_PRESSES Window flag: intended for windows that will often be used when the user is holding the screen against their face, it will aggressively filter the event stream to prevent unintended presses in this situation that may not be desired for a particular window, when such an event stream is detected, the application will receive a CANCEL motion event to indicate this so applications can handle this accordingly by taking no action on the event until the finger is released.

    int FLAG_KEEP_SCREEN_ON Window flag: as long as this window is visible to the user, keep the device's screen turned on and bright.
    当该window对用户可见时,让设备屏幕处于高亮(bright)状态。
    int FLAG_LAYOUT_INSET_DECOR Window flag: a special option only for use in combination with FLAG_LAYOUT_IN_SCREEN.
    int FLAG_LAYOUT_IN_SCREEN Window flag: place the window within the entire screen, ignoring decorations around the border (a.k.a.
    让window占满整个手机屏幕,不留任何边界(border)
    int FLAG_LAYOUT_NO_LIMITS Window flag: allow window to extend outside of the screen.
    window大小不再不受手机屏幕大小限制,即window可能超出屏幕之外,这时部分内容在屏幕之外。
    int FLAG_NOT_FOCUSABLE Window flag: this window won't ever get key input focus, so the user can not send key or other button events to it.
    让window不能获得焦点,这样用户快就不能向该window发送按键事件及按钮事件
    int FLAG_NOT_TOUCHABLE Window flag: this window can never receive touch events.
    让该window不接受触摸屏事件
    int FLAG_NOT_TOUCH_MODAL Window flag: Even when this window is focusable (its {@link #FLAG_NOT_FOCUSABLE is not set), 
    allow any pointer events outside of the window to be sent to the windows behind it.
    即使在该window在可获得焦点情况下,仍然把该window之外的任何event发送到该window之后的其他window.
    int FLAG_SCALED Window flag: a special mode where the layout parameters are used to perform scaling of the surface when it is composited to the screen.
    int FLAG_SECURE Window flag: don't allow screen shots while this window is displayed.
    当该window在进行显示的时候,不允许截屏。
    int FLAG_SHOW_WALLPAPER Window flag: ask that the system wallpaper be shown behind your window.
    在该window后显示系统的墙纸(wallpaper)
    int FLAG_SHOW_WHEN_LOCKED Window flag: special flag to let windows be shown when the screen is locked.
    当锁屏的时候,显示该window.
    int FLAG_SPLIT_TOUCH Window flag: when set the window will accept for touch events outside of its bounds to be sent to other windows that also support split touch. When this flag is not set, the first pointer that goes down determines the window to which all subsequent touches go until all pointers go up. When this flag is set, each pointer (not necessarily the first) that goes down determines the window to which all subsequent touches of that pointer will go until that pointer goes up thereby enabling touches with multiple pointers to be split across multiple windows
    当该window在可以接受触摸屏情况下,让因在该window之外,而发送到后面的window的触摸屏可以支持split touch.
    int FLAG_TOUCHABLE_WHEN_WAKING Window flag: When set, if the device is asleep when the touch screen is pressed, you will receive this first touch event.
    当手机处于睡眠状态时,如果屏幕被按下,那么该window将第一个收到到事件
    int FLAG_TURN_SCREEN_ON Window flag: when set as a window is being added or made visible, once the window has been shown then the system will poke the power manager's user activity (as if the user had woken up the device) to turn the screen on.
    当然window被显示的时候,系统将把它当做一个用户活动事件,以点亮手机屏幕。
    int FLAG_WATCH_OUTSIDE_TOUCH Window flag: if you have set FLAG_NOT_TOUCH_MODAL, you can set this flag to receive a single special MotionEvent with the action MotionEvent.ACTION_OUTSIDE 
    for touches that occur outside of your window.
    如果你设置了该flag,那么在你FLAG_NOT_TOUNCH_MODAL的情况下,即使触摸屏事件发送在该window之外,其事件被发送到了后面的window,那么该window仍然将以MotionEvent.ACTION_OUTSIDE形式收到该触摸屏事件
    softInputMode系列
    该系列主要用于表示softInputMode,我们可以通过WindowManager.LayoutParams的softInputMode变量直接进行设置。softInputMode只能是一个显示软键盘时的window调整方式bite与一个控制软键盘显示状态的bite的组合。
    显示软键盘时的window调整方式可以是SOFT_INPUT_ADJUST_NOTHING,SOFT_INPUT_ADJUST_PAN,
    SOFT_INPUT_ADJUST_RESIZE,SOFT_INPUT_ADJUST_UNSPECIFIED之一。
    用于描述软键盘显示的规则可以是SOFT_INPUT_STATE_ALWAYS_HIDDEN,SOFT_INPUT_STATE_ALWAYS_VISIBLE,
    SOFT_INPUT_STATE_HIDDEN,SOFT_INPUT_STATE_VISIBLE,SOFT_INPUT_STATE_UNSPECIFIED之一
    关于softInputMode的更多知识请参考《软件盘的开关
    所有的softInputMode系列常量如下:
    int SOFT_INPUT_ADJUST_NOTHING Adjustment option for softInputMode: set to have a window not adjust for a shown input method.
    当显示软键盘时,不调整window的布局
    int SOFT_INPUT_ADJUST_PAN Adjustment option for softInputMode: set to have a window pan when an input method is shown, so it doesn't need to deal with resizing but just panned by the framework to ensure the current input focus is visible.
    当显示软键盘时,调整window的空白区域来显示软键盘。即使调整空白区域,软键盘还是有可能遮挡一些有内容区域,这时用户就只有退出软键盘才能看到这些被遮挡区域并进行交互。
    int SOFT_INPUT_ADJUST_RESIZE Adjustment option for softInputMode: set to allow the window to be resized when an input method is shown, so that its contents are not covered by the input method.
    当显示软键盘时,调整window内的控件大小以便显示软键盘。这样的话控件可能会变形。
    int SOFT_INPUT_ADJUST_UNSPECIFIED Adjustment option for softInputMode: nothing specified.
    不指定显示软件盘时,window的调整方式。
    int SOFT_INPUT_IS_FORWARD_NAVIGATION Bit for softInputMode: set when the user has navigated forward to the window.
    表示用户导航(navigate)到了你的window
    int SOFT_INPUT_MASK_ADJUST Mask for softInputMode of the bits that determine the way that the window should be adjusted to accommodate the soft input window.
    显示软键盘时,用于表示window调整方式的bite的mask。
    显示软键盘时的window调整方式可以是SOFT_INPUT_ADJUST_NOTHING,SOFT_INPUT_ADJUST_PAN,SOFT_INPUT_ADJUST_RESIZE,SOFT_INPUT_ADJUST_UNSPECIFIED。
    用于描述软键盘显示的规则可以是SOFT_INPUT_STATE_ALWAYS_HIDDEN,SOFT_INPUT_STATE_ALWAYS_VISIBLE,
    SOFT_INPUT_STATE_HIDDEN,SOFT_INPUT_STATE_VISIBLE,SOFT_INPUT_STATE_UNSPECIFIED之一
    int SOFT_INPUT_MASK_STATE Mask for softInputMode of the bits that determine the desired visibility state of the soft input area for this window.
    用于描述软键盘显示规则的bite的mask.
    int SOFT_INPUT_MODE_CHANGED 用于表示softInputMode发生了变化。关于此的详细内容请看后文。
    int SOFT_INPUT_STATE_ALWAYS_HIDDEN Visibility state for softInputMode
    please always hide any soft input area when this window receives focus.
    总是隐藏软键盘。
    int SOFT_INPUT_STATE_ALWAYS_VISIBLE Visibility state for softInputMode:
     please always make the soft input area visible when this window receives input focus.
    总是显示软键盘
    int SOFT_INPUT_STATE_HIDDEN Visibility state for softInputMode
    please hide any soft input area when normally appropriate (when the user is navigating forward to your window).
    用户导航(navigate)到你的窗口的时候,隐藏软键盘
    int SOFT_INPUT_STATE_UNCHANGED Visibility state for softInputMode: please don't change the state of the soft input area.
    int SOFT_INPUT_STATE_UNSPECIFIED Visibility state for softInputMode: no state has been specified.
    没有软键盘显示的约定规则
    int SOFT_INPUT_STATE_VISIBLE Visibility state for softInputMode: please show the soft input area when normally appropriate 
    (when the user is navigating forward to your window).
    用户导航(navigate)到你的窗口的时候,显示软键盘
    Window type系列
    该系列主要用于表示window的类型。我们可以通过WindowManager.LayoutParams的type变量直接进行设置.
    int TYPE_APPLICATION Window type: a normal application window.
    普通的应用程序window,token必须设置为Activity的token,以指出该窗口属谁
    int TYPE_APPLICATION_ATTACHED_DIALOG Window type: like TYPE_APPLICATION_PANEL, but layout of the window happens as that of a top-level window, not as a child of its container.
    对话框。类似于面板窗口,绘制类似于顶层窗口,而不是宿主的子窗口。
    int TYPE_APPLICATION_MEDIA Window type: window for showing media (e.g.
    媒体窗口,例如视频。显示于宿主窗口下层。
    int TYPE_APPLICATION_PANEL Window type: a panel on top of an application window.
    面板窗口,显示于宿主窗口上层
    int TYPE_APPLICATION_STARTING Window type: special application window that is displayed while the application is starting.
    用于应用程序启动时所显示的窗口。应用本身不要使用这种类型。它用于让系统显示些信息,直到应用程序可以开启自己的窗口
    int TYPE_APPLICATION_SUB_PANEL Window type: a sub-panel on top of an application window.
    应用程序窗口的子面板。显示于所有面板窗口的上层。(GUI的一般规律,越“子”越靠上)
    int TYPE_BASE_APPLICATION Window type: an application window that serves as the "base" window of the overall application; all other application windows will appear on top of it.
    所有程序窗口的“基地”窗口,其他应用程序窗口都显示在它上面。 
    int TYPE_CHANGED 表示window的类型发生了变化,关于此的详细内容请看后文。
    int TYPE_INPUT_METHOD Window type: internal input methods windows, which appear above the normal UI.
    内部输入法窗口,显示于普通UI之上。应用程序可重新布局以免被此窗口覆盖
    int TYPE_INPUT_METHOD_DIALOG Window type: internal input methods dialog windows, which appear above the current input method window.
    内部输入法对话框,显示于当前输入法窗口之上
    int TYPE_KEYGUARD Window type: keyguard window.
    锁屏窗口
    int TYPE_KEYGUARD_DIALOG Window type: dialogs that the keyguard shows
    锁屏时显示的对话框
    int TYPE_PHONE Window type: phone.
    电话窗口。它用于电话交互(特别是呼入)。它置于所有应用程序之上,状态栏之下。
    int TYPE_PRIORITY_PHONE Window type: priority phone UI, which needs to be displayed even if the keyguard is active.
    电话优先,当锁屏时显示。此窗口不能获得输入焦点,否则影响锁屏。
    int TYPE_SEARCH_BAR Window type: the search bar.
    搜索栏。只能有一个搜索栏;它位于屏幕上方。
    int TYPE_STATUS_BAR Window type: the status bar.
    状态栏类型的window。只能有一个状态栏window;它位于屏幕顶端,其他窗口都位于它下方。
    int TYPE_STATUS_BAR_PANEL Window type: panel that slides out from over the status bar
    状态栏的滑动面板
    int TYPE_SYSTEM_ALERT Window type: system window, such as low power alert.
    系统提示window,比如电池低的警告。它总是出现在应用程序窗口之上。
    int TYPE_SYSTEM_DIALOG Window type: panel that slides out from the status bar
    系统对话框。(例如音量调节框)
    int TYPE_SYSTEM_ERROR Window type: internal system error windows, appear on top of everything they can.
    系统内部错误提示,显示于所有内容之上
    int TYPE_SYSTEM_OVERLAY Window type: system overlay windows, which need to be displayed on top of everything else.
    系统顶层窗口。显示在其他一切内容之上。此窗口不能获得输入焦点,否则影响锁屏。
    int TYPE_TOAST Window type: transient notifications.
    toast类型的window
    int TYPE_WALLPAPER Window type: wallpaper window, 
    placed behind any window that wants to sit on top of the wallpaper.
    用于墙纸的window
    window 的类型被分为了3大类:
    Application windows (ranging from FIRST_APPLICATION_WINDOW to LAST_APPLICATION_WINDOW) are normal top-level application windows. For these types of windows, the token must be set to the token of the activity they are a part of (this will normally be done for you if token is null).
    Sub-windows (ranging from FIRST_SUB_WINDOW to LAST_SUB_WINDOW) are associated with another top-level window. For these types of windows, the token must be the token of the window it is attached to.
    System windows (ranging from FIRST_SYSTEM_WINDOW to LAST_SYSTEM_WINDOW) are special types of windows for use by the system for specific purposes. They should not normally be used by applications, and a special permission is required to use them.
    系统专门定义了FIRST_APPLICATION_WINDOW , LAST_APPLICATION_WINDOW,FIRST_SUB_WINDOW, LAST_SUB_WINDOW,
    FIRST_SYSTEM_WINDOW,LAST_SYSTEM_WINDOW 以表示window的3大类型的类型的取值的范围。
    int FIRST_APPLICATION_WINDOW Start of window types that represent normal application windows.
    Constant Value: 1 (0x00000001)
    int FIRST_SUB_WINDOW Start of types of sub-windows.
    Constant Value: 1000 (0x000003e8)
    int FIRST_SYSTEM_WINDOW Start of system-specific window types.
    Constant Value: 2000 (0x000007d0)
    int LAST_APPLICATION_WINDOW End of types of application windows.
    Constant Value: 99 (0x00000063)
    int LAST_SUB_WINDOW End of types of sub-windows.
    Constant Value: 1999 (0x000007cf)
    int LAST_SYSTEM_WINDOW End of types of system windows.
    Constant Value: 2999 (0x00000bb7)
    关于更多请看下文《WindowManager.LayoutParams(下)

    WindowManager.LayoutParams(下)  

    2011-08-07 08:08:54|  分类: Android基础 |  标签:windowmanager   |字号 订阅

     
     
    本文参照自:http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html
    BRIGHTNESS系列
    该系列主要用于设置window的brightness(screenBrightness/buttonBrightness)。我们可以通过WindowManager.LayoutParams的screenBrightness/buttonBrightness变量直接进行设置。
    其中screenBrightness表示屏幕的brightness,而buttonBrightness表示一般按键和键盘按键的brightness
    float BRIGHTNESS_OVERRIDE_FULL Value for screenBrightness and buttonBrightness 
    indicating that the screen or button backlight brightness should be set to the hightest value 
    when this window is in front.
    把brightness(screenBrightness/buttonBrightness)设置到最高值。
    float BRIGHTNESS_OVERRIDE_NONE Default value for screenBrightness and buttonBrightness indicating that the brightness value is not overridden for this window and normal brightness policy should be used.
    不对brightness(screenBrightness/buttonBrightness)重新进行设置,采用默认的普通值。
    float BRIGHTNESS_OVERRIDE_OFF Value for screenBrightness and buttonBrightness indicating that the screen or button backlight brightness should be set to the lowest value when this window is in front.
    把brightness(screenBrightness/buttonBrightness)设置到最低值。
    changed系列
    该系列主要用于 int copyFrom (WindowManager.LayoutParams o)函数中。
    在函数中,首先将用参数中传入的WindowManager.LayoutParams的信息复制到本WindowManager.LayoutParams中,然后返回一个整数,以bite形式表示调用该函数后WindowManager.LayoutParams的哪些信息发送了变化
    int ALPHA_CHANGED 用于表示成员变量alpha是否被改变
    int ANIMATION_CHANGED 用于表示成员变量windowAnimations是否被改变
    int DIM_AMOUNT_CHANGED 用于表示成员变量dimAmount是否被改变
    int FLAGS_CHANGED 用于表示成员变量flags是否被改变
    int LAYOUT_CHANGED 用于表示layout是否被改变.这里的layout是指以下变量所包含的信息:
    width,height,x,y, verticalMargin,verticalWeight,horizontalMargin,horizontalWeight
    int SCREEN_BRIGHTNESS_CHANGED 用于表示brightness是否被改变.
    这里的brightness是指以下变量对应的信息:screenBrightness,buttonBrightness
    int SCREEN_ORIENTATION_CHANGED 用于表示成员变量screenOrientation是否被改变
    int SOFT_INPUT_MODE_CHANGED 用于表示成员变量softInputMode是否被改变
    int TITLE_CHANGED 用于表示成员变量title是否被改变
    int TYPE_CHANGED 用于表示成员变量type是否被改变
    int FORMAT_CHANGED Constant Value: 8 (0x00000008)
    用于表示成员变量format是否被改变
    成员变量
    继承于ViewGroup.LayoutParams的成员变量
    public int height Information about how tall the view wants to be.
    public LayoutAnimationController.AnimationParameters layoutAnimationParameters Used to animate layouts.
    public int width Information about how wide the view wants to be.
    自身的成员变量
    public static final Creator<WindowManager.LayoutParams> CREATOR  
    public float alpha An alpha value to apply to this entire window.
    public float buttonBrightness This can be used to override the standard behavior of the button and keyboard backlights.
    public float dimAmount When FLAG_DIM_BEHIND is set, this is the amount of dimming to apply.
    public int flags Various behavioral options/flags.
    public int format The desired bitmap format.
    public int gravity Placement of window within the screen as per Gravity.
    public float horizontalMargin The horizontal margin, as a percentage of the container's width, between the container and the widget.
    public float horizontalWeight Indicates how much of the extra space will be allocated horizontally to the view associated with these LayoutParams.
    public int memoryType This field is deprecated. this is ignored
    public String packageName Name of the package owning this window.
    public float screenBrightness This can be used to override the user's preferred brightness of the screen.
    public int screenOrientation Specific orientation value for a window.
    public int softInputMode Desired operating mode for any soft input area.
    public int systemUiVisibility Control the visibility of the status bar.
    public IBinder token Identifier for this window.
    public int type The general type of window.
    public float verticalMargin The vertical margin, as a percentage of the container's height, between the container and the widget.
    public float verticalWeight Indicates how much of the extra space will be allocated vertically to the view associated with these LayoutParams.
    public int windowAnimations A style resource defining the animations to use for this window.
    public int x X position for this window.
    public int y Y position for this window.
    成员函数
    ublic Methods
    final int copyFrom(WindowManager.LayoutParams o)
    String debug(String output)
    Returns a String representation of this set of layout parameters.
    int describeContents()
    Describe the kinds of special objects contained in this Parcelable's marshalled representation.
    final CharSequence getTitle()
    static boolean mayUseInputMethod(int flags)
    Given a particular set of window manager flags, determine whether such a window may be a target for an input method when it has focus.
    final void setTitle(CharSequence title)
    String toString()
    Returns a string containing a concise, human-readable description of this object.
    void writeToParcel(Parcel out, int parcelableFlags)
    Flatten this object in to a Parcel.
    转自:http://www.cnblogs.com/shitianzeng/articles/2814050.html
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  • 原文地址:https://www.cnblogs.com/zl1991/p/5123310.html
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