sliding drawer mechanism

第一篇我们就google官方给出的Navigation Drawer demo做了一个简单的介绍，细心的童鞋可能已经发现问题了，google虽然是在support v4中添加的这个控件，但是他给的demo中却使用了ActionBar！ActionBar是在3.0才出现的控件，我们如果想在2.X的版本上同时使用ActionBar和Navigation Drawer，该怎么办呢？http://www.ijiami.cn/treg 其实这个也很简单，我们只需要使用一个开源的library就可以完成了：ActionBarSherlock。ActionBarSherlock的具体用法大家可以参照我的另外一篇教程：http://www.apkbus.com/forum.php?mod=viewthreadtid=121101 我们首先导入ActionBarSherlock： 然后修改MainActivi

The Andoird uses Android's own components, like Slidingdrawer and drawerlayout, are drawer-effect menus, but many of the items to be implemented have been limited by these self-contained components of Android, which makes it difficult to meet the requirements of the project. Custom components, all aspects under their own control, so as to make adjustments to the requirements. To achieve good results, basically the Android based Ontouch event itself to

(r.id.tv);Mdrawer.setondraweropenlistener (New Slidingdrawer.ondraweropenlistener (){@Overridepublic void ondraweropened () {Flag=true;Imbg.setimageresource (R.drawable.down);}});Mdrawer.setondrawercloselistener (New Slidingdrawer.ondrawercloselistener () {@Overridepublic void ondrawerclosed () {Flag=false;Imbg.setimageresource (r.drawable.up);}});Mdrawer.setondrawerscrolllistener (New Slidingdrawer.ondrawerscrolllistener () {@Overridepublic void onscrollended () {Tv.settext ("End Drag");}@Over

The result is as follows: I think you have already seen it in many applications. Next let's take a look at how to achieve the sliding drawer effect using SlidingDrawer. Android. widget. SlidingDrawer class has been added since Android1.5. Some attributes of the SlidingDrawer control: Android: allowSingleTapIndicates whether handle can be enabled or disabled.Android: animateOnClick indicates whether to enabl

) Findviewbyid (r.id.slidingdrawer);tv= (TextView) Findviewbyid (r.id.tv);Mdrawer.setondraweropenlistener (New Slidingdrawer.ondraweropenlistener (){@Overridepublic void ondraweropened () {Flag=true;Imbg.setimageresource (R.drawable.down);}});Mdrawer.setondrawercloselistener (New Slidingdrawer.ondrawercloselistener () {@Overridepublic void ondrawerclosed () {Flag=false;Imbg.setimageresource (r.drawable.up);}});Mdrawer.setondrawerscrolllistener (New Slidingdrawer.ondrawerscrolllistener () {@Overr

, first offset the original point of the content to the negative area nbsP;canvas.translate (Cl-sx,ct-sy); //cut, because there is a translate operation before, all the clipped space is the visible region given by the parent view // So if the child view fills canvas content beyond the given space, it will not show up canvas.cliprect (sx,sy,sx+ ( CRNBSP;-NBSP;CL),sy+ (cb-ct)); //lets the child view draw, notes that the child view does not have to handle the scroll attribute, can realize the conte

Start with Android 5.0 Lollipop to provide a set of APIs to support embedded sliding effects. Forward compatibility is also provided in the latest support V4 package. With the embedded sliding mechanism, many very complex sliding effects can be achieved. The most coordinatorlayout component in the Android Design Suppor

one data can be sent each time only the recipient confirms the data to send the 2nd data. We can see that the sender sends an ACK to the sender to confirm that the data is sent to each receiver.The next data can be transmitted only after receiving the confirmation data. So let's think about it. If the window is too small, then when the transmission of relatively large data need to constantly confirm the data, this time will cause a great delay. If the size of the window definition is too large.

(1). Window Mechanism The basic principle of the sliding window protocol is that at any time, the sender maintains a continuous sequence number of frames allowed to be sent, which is called the sending window. At the same time, the receiver also maintains a continuous sequence number of frames allowed to receive, which is called the Receiving Window. The serial numbers of the sending and receiving windows d

. Another more efficient strategy is that when the receiver finds a frame error, the correct frame that continues to be sent is not immediately delivered to the receiver's upper level, but the receiver can still receive it, store it in a buffer, and require the sender to re-transmit the wrong frame. Once a re-transmitted frame is received, the remaining frames that were already in the buffer can be submitted to the upper level in the correct order. This method is called the selective re-send (Se

After Google released the Android Lollipop version, Google has provided nestedscrolling features for the android sliding mechanism for a better user experience.Where does the nestedscrolling feature go?For example, you use the toolbar, the following scrollview, scroll up to hide toolbar, scroll down to show toolbar, here is logically a nestedscrolling--because you are scrolling through the view of the toolb

(1). Window Mechanism The basic principle of the sliding window protocol is that at any time, the sender maintains a continuous sequence number of frames allowed to be sent, which is called the sending window. At the same time, the receiver also maintains a continuous sequence number of frames allowed to receive, which is called the Receiving Window. The serial numbers of the sending and receiving windows

Model Diagram :We can probably look at the model: The first is a three-time handshake between AB to establish a TCP connection. During the interaction of the message, a sends its own buffer size (window size) 3 to b,b, so that both sides know the window size to the end. A starts sending data, a continuously sends 3 units of data because he knows the buffer size of B. After this wave of data sent, a can no longer be sent, you need to wait for the confirmation of B. A the data sent ove