In this example, a simple Integer Calculator applies multi-touch operations: One Touch operation is addition operations, two touch operations are subtraction operations, three touch operations are multiplication operations, and four touch operations are Division operations.
(Mperformclick = = null) {Mperformclck = new Peformclick ();
} if (!post (Mperformclick)) {PerformClick ();
}
}
}
. . .
}
Break }
..
.
return true; }
As you can know from the above code, the Long_clickable property defaults to false as long as the clickable and long_clickable properties of the view are true (the clickable property of the view and the specific view. Setoncliklistener and Setonlongclicklistener automatically set the above
In the previous chapter, we did not remove the title bar and status bar. If the title bar and status bar are not displayed in the game, it is very easy to remove them, add the following two sentences to the onCreate method of mainActivity:RequestWindowFeature (Window. FEATURE_NO_TITLE); // set no titleGetWindow (). setFlags (WindowManager. LayoutParams. FLAG_FULLSCREEN, WindowManager. LayoutParams. FLAG_FULLSCREEN); // set full screenHurry up and try it. To write a program, you just need to try
Android uses a touch to dynamically draw a rectangle and an android rectangle on the screen.Requirement Overview:
Draw an area with your finger on the screen and return the coordinates of the area in the circle.Technical implementation:
Customize the View, set the paint brush and corresponding parameters, and judge the touch
Android Bottom Drive learning focaltech Touch Screen Example Understanding
This week contacted a specific driver instance-----Focaltech Company's touch IC. The following summary of my personal understanding of touch-screen drive, divided into two aspects: hardware and software-driven aspects
Hardware aspects:
1. Bri
In the previous article, we analyzed the source code of View. onTouchEvent and found the processing principle of click and long-press events. But what if the custom control requires other gestures? If you need to determine a rolling event, the code you learned earlier cannot help, currently, you can also determine by yourself based on ACTOIN and the current Touch Location (if you want to customize rolling events, you can refer to the source code of Li
Apple's touch icon is relatively familiar to us, is Apple in order to support the Web application (or the Web page) to add to the desktop needs of the icon, with these touch icon of the Web links more and native application more similar. Because the Apple equipment ipod,iphone,ipad and so on a wide range of devices, many Web pages have provided the touch icon res
In actual development, the most commonly used multi-touch technology is the zoom-in and zoom-out function. For example, some image browsers can use multiple fingers to zoom in or out the images on the screen. For example, Some browsers can also zoom in or out the font by multi-touch. In fact, amplification and reduction are only one of the practical application examples of multi-
Android View touch event Transfer Mechanism
PS: from the current perspective, you may feel bad about the previous blogs. You may feel the same if you look at the current blog for a while. So I learned to discover and understand new things every moment.Introduction
Because the quality of a previously written blog about the sequence of Android event transfer is too
Android development-touch Event Processing MechanismAndroid touch message transmission mechanismEach user touch (onClick, onLongClick, onScroll, etc .) it is composed of one ACTION_DOWN + n ACTION_MOVE + 1 ACTION_UP. A user must first have an ACTION_DOWN response when touching the user, and there must be an ACTION_UP w
In Android, the message delivery control is mainly through two methods to work together to the user's touch message distribution, the following to see these two methods;
Onintercepttouchevent: This method is defined in ViewGroup, as the name implies, this method is used for ViewGroup interception (intercept) touch messages;
Ontouchevent: This method
Transfer and processing of touch events of Android controls
Understanding the touch event transfer and processing of Android controls is of great significance for us to resolve conflicts between custom controls and touch events in our daily development. The following methods
Events triggered by touching (touch)
Android events: OnClick, onscroll,onfling, etc., are made up of many touch. The first state of touch is definitely action_down, which means that the screen is pressed. After that, the touch will have a follow-up event, which may be:
Act
touch event is not consumed and needs to be passed to other child view processing. If all sub-view does not consume this touch event, and finally the touch event is handled by the ontouchevent of the activity.A full touch event consists of down, move, and up.What is worth noting here is that the activity distribution
1.http://blog.csdn.net/omg_2012/article/details/7881443This one's pretty good.2.http://blog.csdn.net/android_tutor/article/details/71930903.http://blog.csdn.net/heng615975867/article/details/87919374.http://www.dewen.org/q/2438/Action_mask is applied to multi-touch operations in Android, literally meaning the action mask.In Ontouchevent (Motionevent event), use switch (event.getaction ()) to handle Action_d
Mastering the Android Touch event mechanismDavesmith@devunwiredPoints coveredL Touch System OverviewL framwork layer of touch events• Handling of touch eventsL System-provided touchhandlersL System-provided gesturehandlersHow does the An
Apple's touch icon is relatively familiar to us, it is Apple to support Web applications (or Web pages) to add to the desktop needs of the icon, with these touch icon Web links more and native application more similar. Because of the wide range of devices such as Apple device Ipod,iphone,ipad, many Web pages provide the icon resource for touch icon. Since there i
Multi-Touch (MultiTouch) refers to a technique that allows a computer user to control a graphical interface through multiple fingers at the same time. and multi-touch technology is a single touch, single touch device has been for many years, small size of the touch-type mobi
Multi-point touch technology in the actual development process, the most used is to enlarge and reduce the function. For example, there are some image browsers, you can use more than one finger on the screen to operate, to enlarge or shrink the picture. For example, some browsers can also enlarge or shrink the font by multi-touch. In fact, amplification is just a multi-
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