viewgroup

view is given, and if Dispatchtouchevent returns False, the view's Intercepttouchevent method to decide whether or not to intercept this event, if Intercepttouchevent returns True, that is, intercept it, then give it the ontouchevent to handle, if Intercepttouchevent returns FALSE, it is passed to the child view, and the dispatchtouchevent of the sub view begins the distribution of the event. If the event is passed to the ontouchevent of a child view of a layer, this method returns false, and t

Recently saw someone asked the meaning of these three parameters, in fact, help has been very detailed introduction of these three parameters, it seems to be good to learn English, or even explain can not understand./*** Get A View that displays the data on the specified position in the data set. You can either* Create a View manually or inflate it from an XML layout file. When the View is inflated, the* Parent View (GridView, ListView ...) would apply default layout parameters unless you use* {

For example, a horizontal viewgroup, if the width of each view is 300, then the first view is currently displayed when the GETSCROLLX () return value is 0, when you move the first view to the left, the distance is 30, then GETSCROLLX () The return value is 30, if the second view is currently displayed, then the return value of GETSCROLLX () is 300, the second view moves to the left a little, if the distance is 20, then the return value of GETSCROLLX (

button, then the event delivery process:The activity's dispatchtouchevent is triggered first and then the activity's onuserinteraction is triggered and then the dispatchtouchevent of the layout is triggered and the layout onintercepttoucheven T then triggers the button's Ontouch (which is a Action_down event) followed by a action_ The UP event triggers activity's dispatchtouchevent attention no longer triggers activity's onuserinteraction, because he does not work on action_up. Then the dispatc

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Today's time is a little tight, a company organized by the Texas hold ' em to play, I will not say anything more. Just look at the effect first: Effect: Very simple is the center of the central image of the ring scattered! Core Logic: Obviously, this time is designed to place sub-view location, basic and the previous blog technical point is basically consistent, but also adopted the form of custom viewgroup, let the container add sub-view, and th

1. First, post the code that I tested successfully. Copy Code code as follows: protected void onmeasure (int widthmeasurespec, int heightmeasurespec) { int measurewidth = measurespec.getsize (Widthmeasurespec); int measureheigth =

Public Booleanonintercepttouchevent(motionevent ev)Implement This method to intercept all touch screen motion events. This allows your to watch events as they is dispatched toYour children, and take ownership of the "the current gesture on any point.

Distribution Event: DispatchtoucheventTruncation event:intercepttoucheventTouch Event: OnTouch The parent view's distribution event returns TRUE, the parent view handles touch event events, the parent view touch event returns false, is handled

Onfinishinflate () is triggered when all the child controls in the view are mapped to XML Onmeasure (INT, INT) determines the size of all child elements Onlayout (Boolean, Int, INT) is triggered when the view allocates the size and position of all

ScrollView Nested ListView Event Distribution problem (disallowintercept in hidden)#转载请注明出处, thank you. A few days ago friends asked ScrollView nested listview, sliding events only in the Scrollview,listview internal can not slide, although he found

I use the top tab in the home page, that is, pages a open page B page B opens page C error, using the function but always error. Not allowed to load local Resource:file:///android_asset/webkit/android-web Solution: Can only say that the

D/---------------------- grandparent --------------------- (15832): onmeasureD/---------------------- parent --------------------- (15832): onmeasureD/---------------------- child --------------------- (15832): onmeasureD/----------------------

Abslistview Basic classes that can be used to implement the virtualization project list Absspinner Abstract base class for fine-tuned Widgets Adapterviewanimator It uses adapterview as the base class to implement

Let's take a look, There are some differences in the layout effect implemented in ". The height of each grid is irregular, that is, the legendary waterfall flow layout. Generally, this effect can be achieved by using third-party controls, if the

First: onMeasure( widthMeasureSpec, mMaxChildWidth = 0= 0 modeW = 0, modeH = 0 (MeasureSpec.getMode(widthMeasureSpec) !== (MeasureSpec.getMode(heightMeasureSpec) !== childWidthMeasureSpec = childHeightMeasureSpec == (count == 0 (

The view class is the parent of viewgroup, and ViewGroup has all the properties of the VIEW. ViewGroup is primarily used as a container for VIEW. Take the view as your own child and manage it. Of course the child can also be a viewgroup type.The

Android development, touch control everywhere. For some students do not see the source code, how many of this will have some doubts. View event distribution mechanism, not only in doing business requirements will encounter these problems, in some interview written questions are often asked, it is commonplace. I've also seen a lot of people write this article, not too long-winded is too vague, there are some in the details of the dispute is also written, so once again to reorganize this piece of

There are only two protagonists in the touch event distribution: ViewGroup and view. The activity of the touch event is in fact called its internal viewgroup touch events, can be directly treated as viewgroup. View in ViewGroup, ViewGroup can also be in other

Android, do you know how many layers will Crash after the interface layout is nested? androidcrash Let's first put a diagram of Hierarchy Viewer: (simulator Android4.4) Do you see the number 6? The RelativeLayout is the root ViewGroup of MainActivity, and there are 5 layers before RelativeLayout, that is, the default system interface DecorView (FrameLayout) --> LinearLayout --> FramelLayout --> ActionBarOverlayLayout --> ContentFrameLayout. Let's ta