Android implements the user list information feature and then select Delete Slide Delete feature

During the development of the project. It is often necessary to delete information from the user list. There are two ways to delete operations that are used frequently in Android. One is that a similar swipe occurs when the button is deleted, and the other is selected by a checkbox. Then delete it by using the button. The original example integrates the above two modes of operation to achieve the effect of user list deletion.

Design ideas: In the adapter class myadapter a slide to delete the button to show or hide the map, one for the checkbox to select whether the map and a mainacitivyt to interact with the data interface Contentsdeletelistener, At the same time the interface consists of two methods, the contentsdeleteselect (int position, Boolean isChecked) method is used to add or remove the selected or canceled content from the selected list, contentdelete (int Position) is used to delete the column item at the specified position in the list.

The effect of sliding is mainly through when the distance of sliding is greater than 40 o'clock. Display the slide Delete button, and then run the delete operation, all other settings are not visible. and set the checkbox to unchecked.

I. Code implementation EFFECTS

Two. Code implementation

1. Main interface Layout Activity_main.xml

<span style= "FONT-SIZE:18PX;" ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/android"    xmlns:tools= "http// Schemas.android.com/tools "    android:layout_width=" match_parent "    android:layout_height=" Match_parent "    >    <button    android:id= "@+id/my_delete_btn"    android:layout_width= "Match_parent    " android:layout_height= "Wrap_content"    android:layout_alignparentbottom= "true"    android:text= "@string/ Delete "    />    <listview        android:id=" @+id/my_lv "        android:layout_width=" Match_parent "        android:layout_height= "match_parent"        android:layout_alignparenttop= "true"        Android:layout_above = "@id/my_delete_btn"       android:contentdescription= "@string/member_list"/></relativelayout></ Span>

The main interface layout is very easy. Just one. Delete button and a ListView that holds user information

2. User Item Layout Activity_main_list_view.xml

<span style= "FONT-SIZE:18PX;" ><?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/ Res/android "android:id=" @+id/my_rl "android:layout_width=" match_parent "android:layout_height=" 200DP "> &L T CheckBox android:id= "@+id/my_select_cb" android:layout_width= "wrap_content" android:layout_height= "WR Ap_content "android:layout_alignparentleft=" true "android:layout_centervertical=" true "android:layout    _marginleft= "10DP" android:background= "@drawable/my_list_checkbox_selector" android:button= "@null"/> <textview android:id= "@+id/my_content_tv" android:layout_width= "Wrap_content" Android:layout_heigh t= "60DP" android:layout_centerinparent= "true" android:layout_marginleft= "20DP" android:layout_toright of= "@id/MY_SELECT_CB" android:gravity= "center" android:text= "@string/delete"/> <textview ANdroid:id= "@+id/my_delete_tv" android:layout_width= "80DP" android:layout_height= "Wrap_content" Androi        D:layout_alignparentright= "true" android:layout_centerinparent= "true" android:layout_marginleft= "5DP" Android:clickable= "true" android:drawableleft= "@drawable/del_icon_normal" android:gravity= "center" a ndroid:paddingleft= "10DP" android:paddingright= "10DP" android:text= "@string/delete" Android:visibilit Y= "Gone"/></relativelayout></span>

the layout includes a selected checkbox, TextView of the content, and a textview that slides to delete

3. Slide Effect Anim_right_left.xml

<span style= "FONT-SIZE:18PX;" ><?xml version= "1.0" encoding= "Utf-8"? ><set xmlns:android= "Http://schemas.android.com/apk/res/android ">    <translate android:duration=" "Android:fromxdelta=" "        android:fromydelta=" 0 "        android:toxdelta= "0"        android:toydelta= "0"/></set></span>

4.CheckBox Selector my_list_checekbox_selector.xml

<span style= "FONT-SIZE:18PX;" ><?xml version= "1.0" encoding= "Utf-8"? ><selector xmlns:android= "http://schemas.android.com/apk/res/ Android ">     <item android:drawable=" @drawable/my_list_check_box_bg_check "android:state_checked=" true " ></item>      <item android:drawable= "@drawable/my_list_check_box_bg_check" android:state_selected= " True "></item>      <item android:drawable=" @drawable/my_list_check_box_bg_check "Android:state_ Pressed= "true" ></item>      <item android:drawable= "@drawable/my_list__check_box_bg" ></item >  </selector></span>

5 . User List Adapter Myadapter.java

<span style= "FONT-SIZE:18PX;" >package Com.example.slideandselectdeletedemo;import Java.util.hashmap;import Java.util.List;import Java.util.map;import Android.annotation.suppresslint;import Android.content.context;import Android.view.layoutinflater;import Android.view.motionevent;import Android.view.view;import Android.view.view.onclicklistener;import Android.view.view.ontouchlistener;import Android.view.animation.animation;import Android.view.animation.animationutils;import Android.view.ViewGroup; Import Android.widget.baseadapter;import Android.widget.checkbox;import Android.widget.compoundbutton;import Android.widget.compoundbutton.oncheckedchangelistener;import Android.widget.relativelayout;import Android.widget.textview;import COM.EXAMPLE.SLIDEDELETEANDSELECTDEMO.R; @SuppressLint ("Usesparsearrays") public Class Myadapter extends Baseadapter {private Layoutinflater minflater;private list<string> mcontentslist;private Context mcontext;private Contentsdeletelistener mcontentsdeletelistener;//set Swipe to delete whether the button displays private Map<integer, integer> Visibledeletetv;//checkbox Select and no private Map selected <integer, boolean> selectcb;//after sliding x coordinate point private int mlastx = 0;//private int mlasty = 0;public Myadapter (Context mcont Ext, list<string> Mcontentslist,contentsdeletelistener mcontentsdeletelistener) {this.mContext = MContext; This.mcontentslist = Mcontentslist;this.mcontentsdeletelistener = Mcontentsdeletelistener;this.minflater = ( Layoutinflater) Mcontext.getsystemservice (context.layout_inflater_service); Visibledeletetv = new HashMap< Integer, integer> (); SELECTCB = new Hashmap<integer, boolean> ();//update interface, record as unchecked and swipe to delete button not visible for (int i = 0; I & Lt Mcontentslist.size (); i++) {visibledeletetv.put (I, View.gone); Selectcb.put (I, False);}} public void Updateview (list<string> mcontentslist) {this.mcontentslist = mcontentslist; This.notifydatasetchanged ();} @Overridepublic int GetCount () {return mcontentslist.size ();} @Overridepublic Object getItem (int positioN) {return mcontentslist.get (position);} @Overridepublic long Getitemid (int position) {return position;} @Overridepublic View GetView (final int position, view Convertview, ViewGroup parent) {final Holderview holderview;if (CONV Ertview = = null) {Holderview = new Holderview (); Convertview = Minflater.inflate (r.layout.activity_main_list_view,null) ; HOLDERVIEW.LISTSELECTCB = (CheckBox) Convertview.findviewbyid (R.ID.MY_SELECT_CB); Holderview.listcontenttv = ( TextView) Convertview.findviewbyid (R.ID.MY_CONTENT_TV); Holderview.listdeletetv = (TextView) Convertview.findviewbyid (R.ID.MY_DELETE_TV); Holderview.listrl = (relativelayout) Convertview.findviewbyid (R.id.my _RL); Convertview.settag (Holderview);} else {Holderview = (Holderview) convertview.gettag (); if (holderView.listSelectCb.isChecked ()) { HolderView.listSelectCb.setChecked (FALSE);}} Display Content HolderView.listContentTv.setText (mcontentslist.get (position)); if (Visibledeletetv! = null) { HolderView.listDeleteTv.setVisibility (Visibledeletetv.get (position));} if (SELECTCB! = null) {holderView.listSelectCb.setChecked (Selectcb.get (position)); Mcontentsdeletelistener.contentsdeleteselect (Position,selectcb.get (position));} Handle Selection Event HolderView.listRl.setOnClickListener (new Onclicklistener () {@Overridepublic void OnClick (View v) {if ( Visibledeletetv.containsvalue (view.visible)) {//visible, click Settings again is not visible. Not selected for (int i = 0; i < GetCount (); i++) {Visibledeletetv.put (I, View.gone); Selectcb.put (I, false); Mcontentsdeleteliste Ner.contentsdeleteselect (I, false);} Notifydatasetchanged ();} else {Boolean isChecked = holderView.listSelectCb.isChecked ()?
 
 
 False:true;holderview.listselectcb.setchecked (isChecked); Mcontentsdeletelistener.contentsdeleteselect (position , isChecked);}}); HolderView.listSelectCb.setOnCheckedChangeListener (New Oncheckedchangelistener () {@Overridepublic void OnCheckedChanged (Compoundbutton Buttonview,boolean isChecked) {Mcontentsdeletelistener.contentsdeleteselect ( position,ischecked);}); HolderView.listSelectCb.setOnClickListener (New Onclicklistener () {@Overridepublic void OnClick (View v) {if ( Visibledeletetv.containsvalue (view.visible)) {for (int i = 0; i < GetCount (); i++) {Visibledeletetv.put (I, view.gone); Selectcb.put (I, false); Mcontentsdeletelistener.contentsdeleteselect (I, false);} Notifydatasetchanged ();}}); Convertview.setontouchlistener (New Ontouchlistener () {@Overridepublic Boolean onTouch (View V, motionevent event) { Final Animation alpha = animationutils.loadanimation (mcontext,r.anim.anim_right_left); int x = (int) event.getx ();//int y = (int) event.gety ();//LOG.D (TAG, "x=" + x + "y=" + y);//PreSS Downif (event.getaction () = = Motionevent.action_down) {alpha.cancel ();} else if (event.getaction () = = Motionevent.action_move) {alpha.cancel (); int deltax = Mlastx-x;//int DeltaY = mlasty-y;//log.d (TAG, "deltaX=" + Delta X + ", deltay=" + DeltaY); if (DeltaX > 40) {//when the sliding distance is greater than 40 o'clock, the delete key for the position is displayed for (int i = 0; i < GetCount (); i++) {Visibledelet Etv.put (i, View.gone); Selectcb.put (I, false); Mcontentsdeletelistener.contentsdeleteselect (I, false); if (i = = Position) {Visibledeletetv.put (position, view.visible); Selectcb.put (I, true); Mcontentsdeletelistener.contentsdeleteselect (I, true); if (visibledeletetv.get (position) = = view.visible) { HolderView.listDeleteTv.startAnimation (alpha);}}} Notifydatasetchanged ();} return true;} else {//Otheralpha.cancel ();} MLASTX = X;//mlasty = Y;return false;}}); HolderView.listDeleteTv.setOnClickListener (New Onclicklistener () {@Overridepublic void OnClick (View v) {///LOG.D (TAG, "onclick:position=" + position); Mcontentslist.remove (position); McontentsdeletelisteNer.contentdelete (position); for (int i = 0; i < mcontentslist.size (); i++) {Visibledeletetv.put (I, view.gone); Selectcb.put (I, false); Mcontentsdeletelistener.contentsdeleteselect (I, false);} Notifydatasetchanged ();}}); return Convertview;} public class Holderview {public TextView Listcontenttv, listdeletetv;public CheckBox listselectcb;public relativelayout Listrl;} public void Setcontentsdeletelistener (Contentsdeletelistener mcontentsdeletelistener) { This.mcontentsdeletelistener = Mcontentsdeletelistener;}  /** * Interface for deletion of content * * @author Liangming.deng * */public interface Contentsdeletelistener {/** * Select and deselect the selected location according to ischecked * @param position * @param isChecked */public void contentsdeleteselect (int position, Boolean isChecked);/** * Delete specified location contents * @ param position */public void contentdelete (int position);} public void Setvisibledeletetv (Map<integer, integer> visibledeletetv) {This.visibledeletetv = VisibleDeleteTv;} public void SETSELECTCB (Map<integer, boolean> SELECTCB) {This.selECTCB = SELECTCB;}} </span>

5 . Main interface Code Mainactivity.java

<span style= "FONT-SIZE:18PX;" >package Com.example.slideandselectdeletedemo;import Java.util.arraylist;import Java.util.Collections;import Java.util.list;import Android.app.activity;import Android.os.bundle;import Android.view.menu;import Android.view.menuitem;import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.button;import Android.widget.listview;import Com.example.slideandselectdeletedemo.myadapter.contentsdeletelistener;import Com.example.slidedeleteandselectdemo.r;public class Mainactivity extends Activity implements Contentsdeletelistener, Onclicklistener{private ListView mylv;private Button mydeletebtn;private myadapter myadapter;private String[] Mycontentsarray;private list<string> mycontentslist = new arraylist<string> ();p rivate List<String> Myselectedlist = new arraylist<string> (); @Overrideprotected void OnCreate (Bundle savedinstancestate) { Super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); FindByID (); mycontentsarray = This.getresources (). Getstringarray (r.array.my_contents); if (Mycontentsarray! = null) {Collections.addall (mycontentslist, Mycontentsarray);} Myadapter = new Myadapter (this,mycontentslist,this); Mylv.setadapter (Myadapter);} private void FindByID () {mylv = (ListView) This.findviewbyid (R.ID.MY_LV); mydeletebtn = (Button) This.findviewbyid ( R.ID.MY_DELETE_BTN); Mydeletebtn.setonclicklistener (this);} @Overridepublic void Onresume () {Super.onresume ();} @Overridepublic boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu; This adds items to the action bar if it is PR Esent.getmenuinflater (). Inflate (R.menu.main, menu); return true;} @Overridepublic boolean onoptionsitemselected (MenuItem Item) {//Handle Action Bar item clicks here. The action bar will//automatically handle clicks on the Home/up button so long//as you specify a parent activity in and RoidManifest.xml.int id = item.getitemid (); if (id = = r.id.action_settings) {return true;} Return SUPER.ONOPTIONSITEMSELECTED (item);} /* * Add or delete data * (non-javadoc) * to the selected list according to ischecked * @see Com.example.slideandselectdeletedemo.myadapter.contentsdeletelistener#contentsdeleteselect (int, Boolean) */@ overridepublic void contentsdeleteselect (int position,boolean isChecked) {if (isChecked) {Myselectedlist.add ( Mycontentslist.get (position));} Else{myselectedlist.remove (Mycontentslist.get (position));}} /* * Delete data at the specified location * (non-javadoc) * @see com.example.slideandselectdeletedemo.myadapter.contentsdeletelistener# Contentdelete (int) */@Overridepublic void contentdelete (int position) {//TODO auto-generated method Stubmycontentslist.remove (position);} @Overridepublic void OnClick (View v) {//TODO auto-generated method Stubswitch (V.getid ()) {case R.ID.MY_DELETE_BTN: Mycontentslist.removeall (myselectedlist); Myadapter.updateview (mycontentslist); break;}} </span>

Analysis: The myselectedlist is primarily used to store the list information checked by the checkbox. Easy Delete button for all deletions selected.

The main part above gives the gaze.

Source code Address: http://download.csdn.net/detail/a123demi/7751141

Android implements the user list information feature and then select Delete Slide Delete feature