viewgroup

-generated method stub // Set listview to display (Mymusicactivity) mycontext). setlistviewlinearlayoutvisible (false ); // Galleryvisible is hidden (Mymusicactivity) mycontext). setgalleryvisible (true ); } }); Mystorage. setid (2); // Set ID to 2 // Set the button for the local current directory Myimagebutton myimagebuttonfoldernow = new myimagebutton (context, R. drawable. style+mymusic_details, buttontext ); Relativelayout. layoutparams lp1 = new relativ

the setContentView () method, while the setContentView () method is not implemented by the Activity. The following are android. app. code in the Activity: 1 public void setContentView (View view, ViewGroup. layoutParams params) {2 getWindow (). setContentView (view, params); 3 initActionBar (); 4} while getWindow () returns an android. app. window object, which is the mWindow member variable assigned in attach. Android. app. Window is an abstract cla

Dialog Box customization: Java code implementation of relative LayoutCreate alertdiaglog Window window = DLG. getwindow () Create layout. The code is relative layout. Load layout, load related space, and set the location of related controls The Code is as follows: Int bgimageviewid = 10; int iconimageviewid = 11; int textviewid = 12; int buttonokid = 13; int buttoncancelid = 14; int srcimageviewid = 15; Final alertdialog DLG = new alertdialog. builder (this ). create (); DLG. show (); window = D

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

); return true; } return false; } Inside executes Monclicklistener.onclick (this), the OnClick () function that backs up the binding listener. Key points:What is the difference between Ontouch and ontouchevent and how to use it?For:When the view control accepts a touch event, if the control is bound to the Ontouchlistener listener and the control is enable, then the Ontouch () method is executed, and if true, the touch event is consumed, no longer passed down, and if false, Then

This cottage a new version of the list of QQ slide Delete, the last article on the slide to delete the QQ, speculated that the principle is ListView itself each item there is a button, but the general state of the hidden off, detect the left slide when the event pops up hidden button, However, when you switch button state, you give the button a show and hidden animation. This listview is implemented below. The first difficulty is to get a view of its item through ListView, for

which all views are inherited from view and the view is laid out through various layout components (ViewGroup). ViewGroup also inherits from view. All UI controls, such as button, TextView, are inherited from view, and all layout controls such as Relativelayout, container controls, such as ListView, inherit from ViewGroup. So, the main thing about our event oper

There are three events related to touch events in Android:Public Boolean dispatchtouchevent (motionevent eV): transmits the touch event to the target view (which can be your own ).Public Boolean onintercepttouchevent (motionevent eV): defined in viewgroup to intercept the transfer of touch events.Public Boolean ontouchevent (motionevent event): Touch event processing function. Let's talk about two methods of event transmission:Tunnel mode: pass d

OnLayout source code process logic (ANDROID custom view), onlayoutandroid Reprint please indicate this article from the blog of the big glutinous rice (http://blog.csdn.net/a396901990), thank you for your support! Introduction: In the custom view, it is actually very simple. You only need to know the three steps: 1. Measurement -- onMeasure (): Determines the size of the View. 2. Layout -- onLayout ():Determine the position of the View in the ViewGroup