Android launcher-Detailed description of the Startup Process

Launcherapplication-> oncreate
-- 1. // set the minimum heap memory to 4 MB
-- 2. // create an application Icon cache
-- 3. // create launchermodel
-- 4. // register intent. action_package_added, intent. action_package_removed, intent. action_package_changed event listener
Launchermodel listens to events in the preceding 3 as a broadcast Receiver
-- 5. // Add a Data Change listener to the desktop favorites content provider
2 launcher-> oncreate
-- 1. Get the objects initialized by launcherapplication, such as launcherapplication launchermodel miconcache.
-- 2. Create a drag-and-drop controller new dragcontroller (this)
-- 4. // obtain the Desktop component manager and start the Desktop component host
-- To be studied in depth
-- 5. // load all hotseats from array. hotseats (hotkeys such as the hanging button, Google browser)
-- To be studied in depth
-- 6. Load local settings from launcher. preferences
-- 7. // set the wallpaper size width = display. getwidth () * wallpaper_screens_span, Height = display. getheight ()
-- 8. // load the layout File
-- 9. // Initialize all controls
-- 10. // obtain the desktop persistent data from bundle savedinstancestate and set mrestoring to true;
-- 11. If mrestoring = false, call launchermodel to load the desktop item Mmodel. startloader (this, true, isw.agechange );
-- A. launchermodel. loader. startloader () Code Synchronization
-- B. Create the launchermodel. loader. loaderthread thread and start the thread (for details, see Step 3)
-- 12. Register intent. action_close_system_dialogs broadcast listener
Three desktop items load launchermodel. loader. loaderthread. Run: New thread execution
-- 1. Wait until the main thread finishes running to start loading.
-- 2. Determine whether to load the desktop first; loadworkspacefirst = CBK! = NULL? (! CBK. isallpolicvisible (): true;
-- 3. loadworkspacefirst = true
-- A. loadandbindworkspace ()
-- Loadworkspace (): Constructs iteminfo objects of corresponding types from all the desktop items in the database launcher. DB query and saves them
List of mitems, mappwidgets, and mfolders.
-- Bindworkspace ():
-- 1. laucher. startbinding (), asynchronous call, handle in the main thread
// Do no things
-- 2. laucher. binditems (), asynchronous call, handle in the main thread
-- 1. Create a desktop icon view object based on the iteminfo object
-- 2. Obtain item. screen, item. cellx, item. celly, spanx, spany,
Call workspace. addinscreen to add the cell to the corresponding desktop.
-- 1. Reset the layoutparam (type: celllayout. layoutparam) of the desktop icon view)
-- 2. Obtain the celllayout object of the desktop based on item. screen, that is, one of the five users' desktops in the workspace.
-- 3. Call the celllayout. addview method to add the desktop icon view object as the child of celllayout, that is, to add a desktop icon to the user's desktop.
-- 4. Add onlongclicklistener = laucher to the desktop icon view object, which listens to the longclick event of the desktop icon view.
-- 5. If the desktop icon is a droptarget object, drag and drop the Controller mdragcontroller to add the view to the drop-and-drop destination list.
-- 3. laucher. bindfolders (), asynchronous call, handle in the main thread
// Launcher. mfolders. putall (mfolders );
-- 4. laucher. bindappwidget (), asynchronous call, handle in the main thread
-- 1. Get the appwidgetid of launcherappwidgetinfo
-- 2. Get appwidgetproviderinfo appwidgetinfo mappwidgetmanager. getappwidgetinfo (appwidgetid)
-- 3. Create a view appwidgethostview object for the Desktop component based on appwidgetinfo
-- 4. Call workspace. addinscreen to add the cell to the corresponding desktop.
-- 5. laucher. finishbindingitems (), asynchronous call, handle in the main thread
-- Mworkspaceloading = false
-- B. loadandbindallapps ();
If apps are not loaded or the language settings are changed
Loadall1_bybatch ();
-- 1. // set the package query condition intent. action_main intent. category_launcher
-- 2. // clear mallcategory list. Clear ();
-- 3. // packagemanager query all pakages applications
-- 4. Batch apply pakages to mall1_list. Add in batches
-- 5. laucher. bindallapplications () // asynchronous call
-- Mallappsgrid. setapps (Apps)
-- 6. If laucher. bindincluadded () is loaded in multiple batches, // asynchronous call
-- Mallappsgrid. addapps (Apps );
Otherwise
Onlybindallapps ();
-- 1. mallmedialist. Data. Clone ();
-- 2. laucher. bindallapplications () // asynchronous call
-- Mallappsgrid. setapps (Apps)
-- 4. loadworkspacefirst = false
-- A. loadandbindallapps ();
-- B. loadandbindworkspace ();

Original article: http://blog.csdn.net/stonecao/article/details/6536083