Maxwin-z/xlistview-android (Pull-up reload) source code Analysis (ii)

Reprint please specify the source http://blog.csdn.net/crazy__chen/article/details/45980399

Source file http://download.csdn.net/detail/kangaroo835127729/8736887

This article is mainly posted Xlistview source code and a use instance, not too much to explain

Using instances, mainactivity

public class Mainactivity extends Activity {private linkedlist<string> listItems = null;    Private Xlistview ListView = null;     Private arrayadapter<string> adapter; Private string[] Mstrings = {"Aaaaaa", "bbbbbb", "CCCCCC", "dddddd", "eeeeee", "Ffffff", "GGGGGG"     , "Hhhhhh", "IIIIII", "JJJJJJ", "Kkkkkk", "llllll", "Mmmmmm", "nnnnnn",};    @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);                      Setcontentview (R.layout.activity_main);        ListView = (Xlistview) Findviewbyid (r.id.mlist); Listview.setxlistviewlistener (New Ixlistviewlistener () {@Overridepublic void Onrefresh () {new Getdatatask (true). Execute ();}               @Overridepublic void Onloadmore () {new Getdatatask (false). Execute ();}});        ListItems = new linkedlist<string> ();        Listitems.addall (Arrays.aslist (mstrings)); adapter = new Arrayadapter<string> (thisAndroid.        R.layout.simple_list_item_1, ListItems);        Listview.setadapter (adapter);    Listview.setpullloadenable (TRUE);         } private class Getdatatask extends Asynctask<void, Void, string[]> {private Boolean isdropdown;        Public Getdatatask (Boolean isdropdown) {this.isdropdown = Isdropdown; } @Override protected string[] Doinbackground (Void ... params) {try {Thread.slee            P (1000);            } catch (Interruptedexception e) {;        } return mstrings; } @Override protected void OnPostExecute (string[] result) {if (isdropdown) {Li                Stitems.addfirst ("Added after Drop");                                                    Adapter.notifydatasetchanged ();            Listview.stoprefresh ();                } else {Listitems.add ("Added after on Bottom");      Adapter.notifydatasetchanged ();          Listview.stoploadmore ();        } super.onpostexecute (Result); }    }}

Xlistview

public class Xlistview extends ListView implements Onscrolllistener {private float mlasty =-1;//Save Event y/** * for pull-down , sliding back to */private Scroller Mscroller; Used for scroll backprivate onscrolllistener mscrolllistener; User ' s scroll listener//the interface to trigger refresh and load More.private ixlistviewlistener mlistviewlistener;/* * Drop-down head */private xlistviewheader mheaderview;/** * drop-down head body, used to calculate the height of the head * when not refreshed, is hidden */private relativelayout mheaderviewcont ent;/** * drop-down arrow */private TextView mheadertimeview;/** * drop-down head height */private int mheaderviewheight;/** * can pull down refresh */private Boo Lean Menablepullrefresh = true;/** * is refreshing, false indicates that the */private Boolean mpullrefreshing = False is being refreshed; is refreashing.//--footer Viewprivate Xlistviewfooter Mfooterview;private boolean menablepullload;private boolean MP  Ullloading;private Boolean misfooterready = false;//Total list items, used to detect are at the bottom of listview.private int mtotalitemcount;//for Mscroller, scroll to header or Footer.private int mscrollback;/** * Head slide return */private final static int scrollback_header = 0;/** * Footer slide back to */private final static int scrollback_footer = 1;private final static int scroll_duration = 400; Scroll back durationprivate final static int pull_load_more_delta = 50; When pulling up >= 50px//at bottom, trigger//load more.private final static float Offset_radio = 1.8f; Support for IOS like pull//feature./** * @param context */public Xlistview (context context) {super (context); Initwithcontex T (context);} Public Xlistview (context context, AttributeSet Attrs) {Super (context, attrs); Initwithcontext (context);} Public Xlistview (context context, AttributeSet attrs, int defstyle) {Super (context, attrs, Defstyle); Initwithcontext ( context);} private void Initwithcontext (context context) {Mscroller = new Scroller (context, new Decelerateinterpolator ());// Xlistview need the scroll event, and it'll dispatch the event to//user ' s listener (as a proxy). Super.setonscrolllistene R (this);//initializationDrop-down head Mheaderview = new Xlistviewheader (context); mheaderviewcontent = (relativelayout) Mheaderview.findviewbyid ( r.id.xlistview_header_content); Mheadertimeview = (TextView) Mheaderview.findviewbyid (r.id.xlistview_header_time); Addheaderview (Mheaderview);//Initialize Bottom Mfooterview = new Xlistviewfooter (context);// Initialize the drop head height mheaderview.getviewtreeobserver (). Addongloballayoutlistener (New Ongloballayoutlistener () {@ overridepublic void Ongloballayout () {mheaderviewheight = Mheaderviewcontent.getheight ();// Get the height of the drop Head getviewtreeobserver (). Removeglobalonlayoutlistener (this);});}  @Overridepublic void Setadapter (ListAdapter adapter) {/* * will pull up loads more footer join the bottom of the ListView * and ensure that only one */if is added (Misfooterready = = False) {Misfooterready = True;addfooterview (Mfooterview);//listview Native method}super.setadapter (adapter);} /** * Set the pull-down refresh function to open * @param enable */public void Setpullrefreshenable (Boolean enable) {Menablepullrefresh = Enable;if (!m Enablepullrefresh) {//Do not open, hide Head mheaderviewcontent.setvisibility (view.invisible);} else {MheaderviEwcontent.setvisibility (view.visible);}} /** * Set the pull-up load more features open * If you want to turn on, you must actively call this function * @param enable */public void Setpullloadenable (Boolean enable) {Menablepullload = Enable;if (!menablepullload) {//if mfooterview.hide () is not turned on;//Hide Footermfooterview.setonclicklistener (null);//Cancel monitoring// Make sure "pulled up" don't show a line in bottom when the ListView with one page//ensures that the split lines between the ListView item disappear (last) setfooterdivide Rsenabled (false);//listview Native Method} else {mpullloading = False;mfooterview.show (); Mfooterview.setstate ( Xlistviewfooter.state_normal);//make sure "Pull up" don ' t show a line in bottom when the ListView with one page Setfooterdivi Dersenabled (TRUE);//Both "pull Up" and "click" To invoke Load More.mFooterView.setOnClickListener (new Onclicklistener () {@Overridepublic void OnClick (View v) {startloadmore ();}});}} /** * Stop Refresh, reset header view. * Stop Refresh, reset head */public void Stoprefresh () {if (mpullrefreshing = = true) {mpullrefreshing = False;resetheaderheight ();}} /** * Stop load more, reset footer view.* Stop loading more, reset footer */public void Stoploadmore () {if (mpullloading = = true) {mpullloading = False;mfooterview.setstate (xlis Tviewfooter.state_normal);}} /** * Set Last Refresh time * Sets final down refresh times * @param */public void Setrefreshtime (String time) {Mheadertimeview.settex T (time);} private void invokeonscrolling () {if (Mscrolllistener instanceof Onxscrolllistener) {Onxscrolllistener L = ( Onxscrolllistener) mscrolllistener;l.onxscrolling (this);}} /** * Update Head Height * This function is used to pull down when recording how much is pulled down * @param delta */private void Updateheaderheight (float delta) {Mheaderview.setvisiablehei ght (int) delta+ mheaderview.getvisiableheight ()); if (Menablepullrefresh &&!mpullrefreshing) {//Not in refresh State, Update arrows if (Mheaderview.getvisiableheight () > Mheaderviewheight) {mheaderview.setstate (Xlistviewheader.state_ready) ;} else {mheaderview.setstate (xlistviewheader.state_normal);}} Slide to head setselection (0); Scroll to top each time}/** * Reset header view ' s height. * Reset Head height */private void resetheaderheight () {int height =Mheaderview.getvisiableheight (); if (height = = 0)//not visible.return;//refreshing and header isn ' t shown fully. Do nothing.//is refreshing, or the head is not fully displayed, return if (mpullrefreshing && height <= mheaderviewheight) {return;} int finalheight = 0; The default final height, which means to let the head disappear//is refreshing, just scroll back to show all the header.//are refreshing, and the drop-down header fully displays if (Mpullrefreshing &AMP;&A mp Height > mheaderviewheight) {finalheight = Mheaderviewheight;} Mscrollback = scrollback_header;//from the current position, returning to the head is hidden mscroller.startscroll (0, height, 0, Finalheight-height,scroll_ DURATION);//Trigger Computescrollinvalidate ();} /** * Update footer distance from bottom * @param delta */private void Updatefooterheight (float delta) {int height = Mfooterview.getbottommarg  In () + (int) delta;if (menablepullload &&!mpullloading) {if (height > Pull_load_more_delta) {//height enough To invoke load pull up enough well paid to load//More.mFooterView.setState (Xlistviewfooter.state_ready);} else {mfooterview.setstate (xlistviewfooter.state_normal);}} Mfooterview.setbottommaRgin (height);//setselection (mTotalItemCount-1); Scroll to bottom}/** * Reset footer position */private void Resetfooterheight () {int bottommargin = Mfooterview.getbottommargin (); if (BottomMargin > 0) {mscrollback = Scrollback_footer;mscroller.startscroll (0, bottommargin, 0,-bottommargin, Scroll_duration); invalidate ();}} private void Startloadmore () {mpullloading = True;mfooterview.setstate (xlistviewfooter.state_loading); Mlistviewlistener! = null) {Mlistviewlistener.onloadmore ();}} @Overridepublic boolean ontouchevent (motionevent ev) {if (mlasty = =-1) {//Get touch y-coordinate mlasty = Ev.getrawy ();} Switch (ev.getaction ()) {Case MotionEvent.ACTION_DOWN:mLastY = Ev.getrawy (); Break;case MotionEvent.ACTION_MOVE:final float DeltaY = Ev.getrawy ()-mlasty;//pull down or pull up how much offsetmlasty = Ev.getrawy (); if (getfirstvisibleposition () = = 0&& (Mheaderview.getvisiableheight () > 0 | | deltay > 0)) {//The first item is visible and the header is partially displayed or pulled down, it is in the drop-down refresh state//The primary item is showing, and the header has a shown or pull Down.updateheaderhEight (Deltay/offset_radio); invokeonscrolling ();} else if (getlastvisibleposition () = = mtotalitemcount-1&& (mfooterview.getbottommargin () > 0 | | DeltaY < 0) {//The last item is visible and footer is either pulled up or pulled up, it indicates a pull-up refresh state/previous item, already pulled up or want to pull up.updatefooterheight (-delt Ay/offset_radio);} Break;default://action_upmlasty =-1; Resetif (getfirstvisibleposition () = = 0) {//Invoke Refreshif (menablepullrefresh&& Mheaderview.getvisiableheight () > mheaderviewheight) {mpullrefreshing = True;mheaderview.setstate ( xlistviewheader.state_refreshing); if (mlistviewlistener! = null) {Mlistviewlistener.onrefresh ();}} Resetheaderheight ();} else if (getlastvisibleposition () = = mTotalItemCount-1) {//Invoke load More.if (menablepullload && Mfootervi Ew.getbottommargin () > Pull_load_more_delta &&!mpullloading) {Startloadmore ();} Resetfooterheight ();} break;} return super.ontouchevent (EV);} @Overridepublic void Computescroll () {if (Mscroller.compuTescrolloffset ()) {if (Mscrollback = = Scrollback_header) {mheaderview.setvisiableheight (Mscroller.getcurry ());} else {Mfooterview.setbottommargin (Mscroller.getcurry ());} Postinvalidate (); invokeonscrolling ();} Super.computescroll ();} @Overridepublic void Setonscrolllistener (Onscrolllistener l) {mscrolllistener = l;} @Overridepublic void onscrollstatechanged (abslistview view, int scrollstate) {if (Mscrolllistener! = null) { Mscrolllistener.onscrollstatechanged (view, scrollstate);}} @Overridepublic void Onscroll (abslistview view, int firstvisibleitem,int visibleitemcount, int totalitemcount) {//Send T o user ' s listenermtotalitemcount = totalitemcount;if (Mscrolllistener! = null) {Mscrolllistener.onscroll (view, Firstvisibleitem, Visibleitemcount,totalitemcount);}} public void Setxlistviewlistener (Ixlistviewlistener l) {mlistviewlistener = l;} /** * Can listen listview.onscrolllistener or this one. It would invoke * onxscrolling when header/footer scroll back. */public Interface OnxscrolllisteneR extends Onscrolllistener {public void onxscrolling (view view); /** * Implements this interface to get Refresh/load more event. * Dropdown and pull-up listener */public interface Ixlistviewlistener {public void Onrefresh ();p ublic void Onloadmore ();}}

Xlistviewheader

public class Xlistviewheader extends LinearLayout {/** * drop-down layout body */private linearlayout mcontainer;/** * drop-down arrow */private Ima  Geview marrowimageview;/** * Ring progress bar */private ProgressBar mprogressbar;/** * hint text */private TextView mhinttextview;private int mstate = state_normal;private Animation mrotateupanim;private Animation mrotatedownanim;/** * Animation time */private final in T rotate_anim_duration = 180;public final static int state_normal = 0;//normal state public final static int state_ready = 1;//Pull Ready Refresh public final static int state_refreshing = 2;//Loading public xlistviewheader (context context) {super (context); Initview ( context);} /** * @param context * @param attrs */public Xlistviewheader (context context, AttributeSet Attrs) {Super (context, attrs); I Nitview (context);} private void Initview (context context) {///initial case, set dropdown refresh view height to 0linearlayout.layoutparams LP = new Linearlayout.layoutparams (layoutparams.fill_parent, 0); Mcontainer = (linearlayout) layoutinflater.from (context). Inflate (R.layout.xlistview_header, null); AddView (Mcontainer, LP); setgravity (gravity.bottom); Marrowimageview = (ImageView) Findviewbyid (r.id.xlistview_ Header_arrow); Mhinttextview = (TextView) Findviewbyid (r.id.xlistview_header_hint_textview); Mprogressbar = ( ProgressBar) Findviewbyid (R.id.xlistview_header_progressbar);//Rotate animation Mrotateupanim = new Rotateanimation (0.0f,- 180.0f,animation.relative_to_self, 0.5f, animation.relative_to_self,0.5f);//Set animation time Mrotateupanim.setduration ( rotate_anim_duration);//The animation stops at the last frame, that is, the state after the animation is preserved mrotateupanim.setfillafter (true);//Rotate animation Mrotatedownanim = new Rotateanimation ( -180.0f, 0.0f,animation.relative_to_self, 0.5f, animation.relative_to_self,0.5f); Mrotatedownanim.setduration (rotate_anim_duration); Mrotatedownanim.setfillafter (true);} public void SetState (int.) {if (state = = mstate) return; if (state = = state_refreshing) {//Show Progress Marrowimageview.clear Animation (); marrowimageview.setvisibility (view.invisible); mprogressbar.setvisibility (view.visible);} else {//show arrows picture marrowimageview.setvisibility (View.visible); mprogressbar.setvisibility (view.invisible);} Switch (state) {case State_normal:if (mstate = = State_ready) {marrowimageview.startanimation (Mrotatedownanim);} if (mstate = = state_refreshing) {marrowimageview.clearanimation ();} Mhinttextview.settext (r.string.xlistview_header_hint_normal); Break;case state_ready:if (mState! = STATE_READY) { Marrowimageview.clearanimation (); marrowimageview.startanimation (Mrotateupanim); Mhinttextview.settext ( R.string.xlistview_header_hint_ready);} Break;case STATE_REFRESHING:mHintTextView.setText (r.string.xlistview_header_hint_loading); break;default:}mstate = State;} /** * Set the drop head effective height * @param height */public void setvisiableheight (int height) {if (height < 0) height = 0; Linearlayout.layoutparams LP = (linearlayout.layoutparams) mcontainer.getlayoutparams (); lp.height = height; MCONTAINER.SETLAYOUTPARAMS (LP);} /** * Get the drop head effective height * @return */public int getvisiableheight () {return mcontainer.getlayoutparams (). Height;}}

Xlistviewfooter

public class Xlistviewfooter extends LinearLayout {public final static int state_normal = 0;//normal state public final static int State_ready = 1;//Pull ready to refresh public final static int state_loading = 2;//loading private Context mcontext;private View Mcontentview ;p rivate View mprogressbar;private TextView mhintview;public xlistviewfooter (context context) {super (context); Initview (context);} Public Xlistviewfooter (context context, AttributeSet Attrs) {Super (context, attrs); Initview (context);} /** * Set Status * @param state */public void setState (int state) {mhintview.setvisibility (view.invisible); Mprogressbar.setvisibility (view.invisible); mhintview.setvisibility (view.invisible); if (state = = STATE_READY) { Mhintview.setvisibility (view.visible); Mhintview.settext (R.string.xlistview_footer_hint_ready);} else if (state = = state_loading) {mprogressbar.setvisibility (view.visible);} else {mhintview.setvisibility ( view.visible); Mhintview.settext (R.string.xlistview_footer_hint_normal);}} /** * Set the height of the bottom of the footer * @param height */public void setbottommargin (int height) {if (height < 0) return; Linearlayout.layoutparams LP = (linearlayout.layoutparams) mcontentview.getlayoutparams (); lp.bottomMargin = height; MCONTENTVIEW.SETLAYOUTPARAMS (LP);} /** * Get the height of the bottom of the footer * @return */public int getbottommargin () {linearlayout.layoutparams LP = (linearlayout.layoutparams) Mcontentview.getlayoutparams (); return lp.bottommargin;} /** * Normal status */public void Normal () {mhintview.setvisibility (view.visible); Mprogressbar.setvisibility ( View.gone);} /** * Loading status */public void loading () {mhintview.setvisibility (view.gone); Mprogressbar.setvisibility ( view.visible);} /** * Hide Footer when disable pulling load more */public void Hide () {linearlayout.layoutparams LP = (Linearlayout.layoutpar AMS) Mcontentview.getlayoutparams (); lp.height = 0;MCONTENTVIEW.SETLAYOUTPARAMS (LP);} /** * Show footer */public void Show () {linearlayout.layoutparams LP = (linearlayout.layoutparams) Mcontentview.getlayoutparams (); lp.height = Layoutparams.wraP_CONTENT;MCONTENTVIEW.SETLAYOUTPARAMS (LP);} /** * Initialize layout * @param context */private void Initview (context context) {Mcontext = context; LinearLayout Moreview = (linearlayout) layoutinflater.from (Mcontext). Inflate (r.layout.xlistview_footer, NULL); AddView (Moreview); Moreview.setlayoutparams (New Linearlayout.layoutparams (Layoutparams.fill_parent, layoutparams.wrap_content)); Mcontentview = Moreview.findviewbyid (r.id.xlistview_footer_content); MProgressBar = Moreview.findviewbyid (r.id.xlistview_footer_progressbar); Mhintview = (TextView) Moreview.findviewbyid ( R.id.xlistview_footer_hint_textview);}}

Maxwin-z/xlistview-android (Pull-up reload) source code Analysis (ii)