android touch screen tablet

: ------------------------------------------------------------------- First, trigger the dispatchtouchevent of the activity. Then, the onuserinteraction of the activity is triggered. Then, the dispatchtouchevent of layout is triggered. Then, the onintercepttouchevent of layout is triggered. ------------------------------------------------------------------- View: http://hi.baidu.com/lck0502/blog/item/7eeb452a846ff196023bf654.html ========================================================== =======

touching? 2. Does the Android system know what you want to do? For example, click, scroll, long press, or others? 5. Explain the above 2nd questions in sequence, because the view must be first found based on the guess, and then the view is specified for corresponding processing. The event Learning Series is going to learn from bottom to bottom. Let's take a look at the second question. How does the system know what users want? (What is a user's gest

There are only two main characters in touch event distribution: ViewGroup and view. The activity's touch event is actually called the ViewGroup touch event inside it, and can be treated directly as ViewGroup.View within the ViewGroup, ViewGroup can also be in other viewgroup, this time the internal viewgroup as a view to analyze.There are three related events in

written by Java code implement security The JSON data returnedWe can handle the resulting JSON data as needed.Will Google improve?The answer is yes, and it has improved, but Google is not modifying the onreceivedtouchiconurl approach, but Google is pushing its own set of rules.On Chrome, Google adds an element that Google provides as a way to define metadata for a Web program.In the metadata JSON, you can customize the title, the start page, whether the program is horizontal or vertical

Reprinted from Http://www.cnblogs.com/xiaoweiz/p/3833079.htmlFirst, let's look at the definition of touch mode. It is a state of the view hierarchy when the user interacts with the phone. It's very easy to understand,Represents whether the most recent interaction occurred through a touchscreen, because there are other ways of interacting on Android devices, such as d-pad, scrolling balls, and so on.Why is

, "ACTION is CANCEL"); return true; Case (Motionevent.action_outside): Log.d (Debug_tag, "Movement occurred OUTSIDE bounds" + "of the current screen Eleme NT "); return true; Default:return super.ontouchevent (event); } } The events provided by Ontouch are relatively simple, and using this interface can be cumbersome if you need to handle some complex gestures, because we have to judge what gestures are based on the user's

the following sentence to display a static image on the android panel: ImageView imageView = (ImageView)findViewById(R.id.imageView); By setting the matrix, we can get some basic operations on the imageview. OK. If you have so many questions, enter the topic below: We need to implement an ontouchlistener method to set the listener attribute of imageview, which is located in Android. View. View. ontouchli

, invokes the Dispatchtouchevent method of each view, and when the child view is ViewGroup, The Dispatchtouchevent method of its internal view is resumed by calling Viwgroup's Dispatchtouchevent method. The order of the messages in the above example is this: ①-②-⑤-⑥-⑦-③-④. The Dispatchtouchevent method is only responsible for the distribution of the event, which has a Boolean return value, and when returned to true, the order is interrupted. In the above example, if ⑤ 's Dispatchtouchevent retur

, "ACTION is up"); return true; Case (Motionevent.action_cancel): Log.d (Debug_tag, "ACTION is CANCEL"); return true; Case (Motionevent.action_outside): Log.d (Debug_tag, "movement occurred OUTSIDE Bounds" + "O F Current screen element "); return true; Default:return super.ontouchevent (event); } }The events provided by Ontouch are relatively simple, and if you need to deal with some complex ges

Android Touch Gesture Basics Official Document OverviewTouch Gesture Detection BasicsGesture detection typically consists of two stages:1. Get Touch event data2. Parse the data to see if they meet some of the gestures your app supports.Related APIs:　　MotionEventCompatible version of:　　MotionEventCompat(Note that Motioneventcompat are not a replacement for the Mot

I. Differences between click events and touch events: Click Event: For a button, the system responds to both the button and the touch screen event; Touch event: For a button, only the touch screen event is returned; Therefore, we

Android Application Development-full solution to custom View touch-related toolsBackground Recently, there have been some chaos, various things, and various intersections. Fortunately, there is a bit more self-motivated, so we will continue to sort out the core knowledge of the custom series. As mentioned in the previous blog on custom controls, we will not teach you how to take things, but how to teach the

speed of movement of pointer.Android provides VelocityTracker classes and Velocitytrackercompat classes to record the speed of touch events.code example:Tracking VelocityScrolling gesturesIf a standard layout is likely to exceed its container boundaries, it can be nested in a ScrollView , so that a scrollable layout can be obtained and handled by Framewok.Implementing a custom scroller should only be required in some special cases.Scroller is used t

This example is more useful, basically can say, after writing this time, in many cases, come directly to AddView , and then Addinterceptorview a bit, You can easily reach specific controls in the composite interface to respond to touch events in a particular direction. Please respect the original labor results, reproduced please specify the source:http://blog.csdn.net/cyp331203/article/details/45198549, Do not allow for commercial or profit-making pu