View屬性小結(jié)

待改進(jìn)

標(biāo)識類屬性

1. android:id:Supply an identifier name for this view, to later retrieve it with View.findViewById() or Activity.findViewById(). [reference]:提供一個標(biāo)識符名稱給這個組件，后面可以通過：View.findViewById()或者Activity.findViewById()來獲取這個組件。

   方法：

   • setId(int)

2. android:tag:Supply a tag for this view containing a String, to be retrieved later with View.getTag() or searched for with View.findViewWithTag() . [string]:這個屬性和android:id的作用和用法一樣，api上建議使用android:id原因是id更快而且支持編譯時類型的檢查(It is generally preferable to use IDs (through the android:id attribute) instead of tags because they are faster and allow for compile-time type checking.)

3. android:contentDescription:Defines text that briefly describes content of the view. [string]:定義一個文本來暫時描述這個控件

位置類屬性

1. scrollX/Y:The initial vertical/horizontal scroll offset, in pixels. [dimension]:初始的垂直/水平 滾動偏移量，像素為單位

2. padding:Sets the padding, in pixels, of all four edges. [dimension]:設(shè)置四面的外邊距，以像素為單位,控件的大小是包括了padding的，padding可以覆蓋背景

   方法

   • setPaddingRelative(int,int,int,int)

3. paddingTop/Bottom/Left/Right/End/Start:Sets the padding, in pixels, of the left// edge; see padding. [dimension]

   方法

   • setPaddingRelative(int,int,int,int)

4. android:fitsSystemWindows:Boolean internal attribute to adjust view layout based on system windows such as the status bar. [boolean]:是否要更具系統(tǒng)的窗口的改變(比如是否有狀態(tài)欄)而改變控件的內(nèi)部屬性；

5. translationX/Y:translation in x/y of the view. [dimension]:改變位置？

   方法

   • setTranslation(float)

6. android:layoutDirection:Defines the direction of layout drawing. [enum]：定義控件的繪制方向

   屬性值

   • ltr:0,Left-to-Right
   • rtl:1,Right-to-Left
   • inherit:3,Inherit from parent
   • locale:3,Locale

外觀類屬性

1. android:background:A drawable to use as the background. [color, reference]：將一個可繪制的東西作為背景

   方法：

   • setBackgroundResource(int)

2. android:visibility:Controls the initial visibility of the view. [enum]:設(shè)置控件舒適化是是否可見

   屬性值

   1. visibile：0,Visible on screen; the default value.可見，默認(rèn)值
   2. invisibile:1,Not displayed, but taken into account during layout (space is left for it).不可見，但是占據(jù)地方
   3. gone,2,Completely hidden, as if the view had not been added.完全隱藏，控件不會添加到布局中。

   方法

   • setVisibility(int)

3. android:scrollbars:Defines which scrollbars should be displayed on scrolling or not. [flag]：定義哪個滾動條滾動(是可滾動還是顯示？)

   1. none：0x00000000，No scrollbar is displayed.
   2. horizontal：0x00000100，Displays horizontal scrollbar only.
   3. vertical：0x00000200，Displays vertical scrollbar only.

4. android:scrollbarStyle:Controls the scrollbar style and position. [enum]:控制滾動條的風(fēng)格和位置

   1. insideOverlay：0x0，Inside the padding and overlaid
   2. insideinset：0x01000000，Inside the padding and inset
   3. outsideOverlay：0x02000000，Edge of the view and overlaid
   4. outsideinset：0x03000000，Edge of the view and inset

   方法

   • setScrollBarStyle(int)

5. android:fadeScrollbars:Defines whether to fade out scrollbars when they are not in use. [boolean]:定義是否要做模糊處理對于沒有使用的滾動條

   方法

   • setScrollbarFadingEnable(boolean)

6. android:scrollbarFadeDuration:Defines the delay in milliseconds that a scrollbar takes to fade out. [integer]：設(shè)置滾動條fade out過程話費(fèi)的時間

   方法

   • setScrollBarFadeDuration(int)

7. android:scrollbarDefaultDelayBeforeFade:Defines the delay in milliseconds that a scrollbar waits before fade out. [integer]:設(shè)置滾動條fade out 延遲的時間

   方法

   • setScrollBarDefaultDelayBeforeFade(int)

8. android:scrollbarSize:Sets the width of vertical scrollbars and height of horizontal scrollbars. [dimension]:設(shè)置水平滾動條的高度或者垂直滾動條的寬度。

   方法

   • setScorllBarSize(int)

9. android:scrollbarTrackHorizontal/Vertical:Defines the horizontal/vertical scrollbar track drawable. [reference]:定義軌跡

10. android:requiresFadingEdge:Defines which edges should be faded on scrolling. [flag]：定義哪個邊緣應(yīng)該被模糊處理在滾動的時候

    屬性值

    • none：0x00000000，No edge is faded.
    • horizontal：0x00001000，F(xiàn)ades horizontal edges only.
    • vertical：0x00002000，F(xiàn)ades vertical edges only.

    方法

    • setVerticalFadingEdgeEnabled(boolean)
    • setHorizontalFadingEdgeEnabled(boolean)

11. android:fadingEdgeLength:Defines the length of the fading edges. [dimension]:定義邊緣填充的長度

    方法

    • getVerticalFadingEdgeLength()

12. android:keepScreenOn:Controls whether the view's window should keep the screen on while visible. [boolean]:設(shè)置控件是否能夠保持屏幕常亮

    方法

    • setKeepScreenOn(boolean)

13. android:minHeight:Defines the minimum height of the view.：定義控件的最小高度

    方法

    • setMinimunHeight(int)

14. android:minWidth:Defines the minimum width of the view.：定義控件的最小寬度

    方法

    • setMinimunWidth(int)

15. android:alpha:alpha property of the view, as a value between 0 (completely transparent) and 1 (completely opaque). [float]:設(shè)置控件的透明度(值 0-1)

    方法

    • setAlpha(float)

16. android:rotation:rotation of the view, in degrees. [float]：設(shè)置控件的旋轉(zhuǎn)角度

    方法

    • serRotation(float)

17. android:rotationX/Y:rotation of the view around the x/y axis, in degrees. [float]:設(shè)置旋轉(zhuǎn)的中心

    方法

    • setRotationX(float)
    • setRotationY(float)

18. android:scaleX/Y:scale of the view in the x/y direction. [float]:設(shè)置控件在某個方向上的大小

    方法

    • setScaleX(float)

19. textDirection:Defines the direction of the text. [integer, enum]

    1. inherit:0,Default
    2. firstStrong:1,
    3. anyRtl:2,
    4. ltr:3,
    5. rtl:4,
    6. locale:5,
    7. firstStrongLtr:6,
    8. firstStrongRtl:7,

20. android:textAlignment:Defines the alignment of the text. [integer, enum]:定義控件中文本的對齊方式

    1. inherit：0，Default
    2. vertical：1，
    3. textStart：2，
    4. textEnd：3，
    5. center：4，
    6. viewStart:5,
    7. viewEnd:6,

    方法

    • setTextAlignment(int)

焦點(diǎn)、動作

1. android:focusable：Boolean that controls whether a view can take focus. [boolean]：設(shè)置控件能否接收焦點(diǎn)

   方法

   • setFocusable(boolean)

2. focusableInTouchMode:Boolean that controls whether a view can take focus while in touch mode. [boolean]:設(shè)置控件能否能夠獲得焦點(diǎn)在觸摸模式下

   方法

   • setFocusableInTouchMode(boolean)

3. android:nextFocusLeft:Defines the next view to give focus to when the next focus is FOCUS_LEFT. [reference]:定義當(dāng)按下左的時候下一個獲得焦點(diǎn)的控件

   方法

   • setNextFocusLeftId(int);

4. android:nextFocusForward/Right/Up/Bottom:Defines the next view to give focus to when the next focus is FOCUS_RIGHT If the reference refers to a view that does not exizst or is part of a hierarchy that is invisible, a java.lang.RuntimeException will result when the reference is accessed. [reference]

   方法

   • setNextFocusRightId(int)
   • setNextFocusUpId(int)
   • setNextFocusForward(int)
   • setNextFocusBottom(int)

5. android:clickable:Defines whether this view reacts to click events. [boolean]:定義這個控件能否觸發(fā)點(diǎn)擊事件

   方法

   • setClickable(boolean)

6. android:longClickable:Defines whether this view reacts to long click events. [boolean]:定義控件是否可以反饋長點(diǎn)擊事件

   方法

   • setLongClickable(boolean)

7. android:duplicateParentState:When this attribute is set to true, the view gets its drawable state (focused, pressed, etc.) from its direct parent rather than from itself. [boolean]:控制控件的狀態(tài)(焦點(diǎn)，按壓)是否由父控件決定

8. android:onClick:Name of the method in this View's context to invoke when the view is clicked. [string]：當(dāng)控件被點(diǎn)擊的時候能否被環(huán)境所調(diào)用，F(xiàn)or instance, if you specify android:onClick="sayHello", you must declare a public void sayHello(View v) method of your context (typically, your Activity).

9. android:longClickable:Defines whether this view reacts to long click events. [boolean]：定義這個控件是否可以有長按的事件反饋

   方法

   • setLongClickable(boolean)

動畫

性能類屬性

2. scrollbarAlwaysDrawHorizontal(Vertical)Track:Defines whether the horizontal(vertical) scrollbar track should always be drawn. [boolean]：定義水平/垂直 滾動條是否要一直被繪制

3. android:saveEnabled:If unset, no state will be saved for this view when it is being frozen. [boolean]:設(shè)置控件的狀態(tài)是否能被保存。

   方法

   • setSaveEnable(boolean)

4. drawingCacheQuality:Defines the quality of translucent drawing caches. [enum]：定義透明繪制的緩沖特性

   1. auto:0,Lets the framework decide what quality level should be used for the drawing cache.(默認(rèn)值)
   2. low:1,Low quality. When set to low quality, the drawing cache uses a lower color depth, thus losing precision in rendering gradients, but uses less memory.
   3. high:2,High quality. When set to high quality, the drawing cache uses a higher color depth but uses more memory.

   方法

   • setDrawingCacheQuality(int)

5. android:layerType:Specifies the type of layer backing this view. [enum] (硬件加速？)

   1. none:0,Don't use a layer.
   2. software:1,Use a software layer. Refer to setLayerType(int, android.graphics.Paint) for more information.
   3. hardware:2,Use a hardware layer. Refer to setLayerType(int, android.graphics.Paint) for more information.

   方法

   • setLayerType(int,Paint)

功能屬性

1. android:soundEffectsEnabled:Boolean that controls whether a view should have sound effects enabled for events such as clicking and touching. [boolean]：設(shè)置控件在點(diǎn)擊和觸摸的時候是否有聲音的反饋

   方法

   • setSoundEffectsEnabled(boolean)

2. android:hapticFeedbackEnabled:Boolean that controls whether a view should have haptic feedback enabled for events such as long presses. [boolean] ：定義控件是否有haptic feedback對于一些事件

   方法

   • setHapticFeedbackEnabled(boolean)

3. android:filterTouchesWhenObscured:Specifies whether to filter touches when the view's window is obscured by another visible window. [boolean]:設(shè)置當(dāng)控件被其他控件覆蓋的時候能否反饋觸碰操作

   方法

   • setFilterTouchesWhenObscured(boolean)

4. android:accessibilityLiveRegion:Indicates to accessibility services whether the user should be notified when this view changes. [integer, enum]：表明當(dāng)控件改變的時候是否要讓用戶知道

   屬性值

   • none:0
   • polite:1
   • assertive:2

   方法

   • setAccessibilityLiveRegion(int)