CheckBox Select all, reverse, calculate price, delete

Activity_main.xml

<linearlayout 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 "Android:orien tation= "vertical" > <linearlayout android:layout_width= "match_parent" android:layout_height= "Wrap_conten T "> <button android:id=" @+id/button1 "android:layout_width=" Wrap_content "Android:lay out_height= "Wrap_content" android:text= "Select All" android:layout_weight= "1"/> <button and Roid:id= "@+id/button2" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" Andro id:text= "Reverse Select" android:layout_weight= "1"/> <button android:id= "@+id/button3" Androi D:layout_width= "Wrap_content" android:layout_height= "wrap_content" android:text= "All not selected" Android:layout         _weight= "1"/> <buttonAndroid:id= "@+id/button4" android:layout_width= "wrap_content" android:layout_height= "Wrap_content" an droid:text= "Delete" android:layout_weight= "1"/></linearlayout><textview android:id= "@+id/price "Android:layout_width=" wrap_content "android:layout_height=" wrap_content "/><listview android:id=" @+id        /listveiw "android:layout_width=" match_parent "android:layout_height=" Match_parent "></ListView> </LinearLayout>

　

Listveiw.xml

If the ListView item contains a checkbox, the ListView will not have a checked state when the ListView is selected because the focus priority of the checkbox is higher than the ListView. The workaround is to add a property to the CheckBox component: Android:focusable= "false"

　

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" match_parent "    android:layout_height=" match_parent ">   <textview        android:id= "@+id/text"       android:layout_width= "wrap_content"       android:layout_height= "Wrap_content"       android:text= "ddd"              />   <checkbox       android:id= "@+id/checkbox"       android:layout_width= " Wrap_content "       android:layout_height=" wrap_content "              android:focusable=" false "          android:clickable= "False"       android:layout_alignparentright= "true"       android:layout_alignparenttop= "true"/></ Relativelayout>

Mainactivity.java

Package Com.bawei.day04_listview;import Java.util.arraylist;import Java.util.iterator;import java.util.List;import Com.bawei.day04_listview. Adper.viewholder;import Com.bawei.vo.good;import Android.os.bundle;import Android.app.activity;import Android.view.menu;import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.adapterview;import Android.widget.adapterview.onitemclicklistener;import Android.widget.baseadapter;import Android.widget.button;import Android.widget.listview;import    Android.widget.textview;public class Mainactivity extends Activity {private Button button1;    Private Button button2;    Private Button Button3;    Private ListView ListView;    Private list<good> List;    Private TextView Price;    private int num=0;    private int pric=0;    Private Baseadapter adapter;    Private Button Button4;    Private list<good> Li; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Button1 = (Button) Findviewbyid (r.id.button1);//Select All Button2 = (Button) Findviewbyid (r.id.button2);//Counter-select Button 3 = (Button) Findviewbyid (r.id.button3);//Select All Button4 = (Button) Findviewbyid (r.id.button4);//Delete ListView =        (ListView) Findviewbyid (R.ID.LISTVEIW);//Price = (TextView) Findviewbyid (R.id.price);        List = new arraylist<good> ();        Assignment for (int i = 0; i < i++) {List.add (New Good (i+ "", false));        }//Adaptation adapter = new Adper (list,mainactivity.this);        Listview.setadapter (adapter);                Select All Button1.setonclicklistener (new Onclicklistener () {public void OnClick (View v) {                 TODO auto-generated method Stub num = 0;                pric = 0;               for (int i = 0; i < list.size (); i++) {//change Boolean     List.get (i). Setbo (True);                         If you select if (List.get (i). Getbo ()) {num++;                                        Pric+=integer.parseint (List.get (i). GetName ());                }}//Refresh adapter.notifydatasetchanged ();                            Display Price.settext ("+num+" is selected, "+" Price is "+pric+");        }        });                Inverse selection Button2.setonclicklistener (new Onclicklistener () {public void OnClick (View v) {                 TODO auto-generated method Stub num = 0;                pric = 0;                        for (int i = 0; i < list.size (); i++) {//Change value if (List.get (i). Getbo ()) {                    List.get (i). Setbo (false);                    }else{List.get (i). Setbo (True);      }//Refresh              Adapter.notifydatasetchanged ();                         If you select if (List.get (i). Getbo ()) {num++;                                            Pric+=integer.parseint (List.get (i). GetName ());            }}//Show Price.settext with TextView ("+num+", "+" Price is "+pric+" yuan);        }        });                All Button3.setonclicklistener (new Onclicklistener () {public void OnClick (View v) {                 TODO auto-generated method Stub num = 0;                pric = 0;                    for (int i = 0; i < list.size (); i++) {//Change value list.get (i). Setbo (false);                    Refresh adapter.notifydatasetchanged ();                         If you select if (List.get (i). Getbo ()) {num++; Pric+=integer.parseinT (List.get (i). GetName ());            }} price.settext ("+num+" is selected altogether, "+" Price is "+pric+");        }        });        Delete 1/*li = new arraylist<good> (); Button4.setonclicklistener (New Onclicklistener () {public void OnClick (View v) {// TODO auto-generated method stub for (int i = 0; i < list.size (); i++) {if (List.get (i                                            ). Getbo ()) {//Save up Li.add (List.get (i)) to be deleted;                }}//delete List.removeall (LI);                 Adapter.notifydatasetchanged ();                 num = 0;                pric = 0;            Price.settext ("A total of selected" +num+ "pieces," + "Price is" +pric+ "Yuan"); }}); *//delete 2 Button4.setonclicklistener (new Onclicklistener () {public void ONclick (View v) {//TODO auto-generated Method Stub//Get Iterator for list collection Iterator                It=list.iterator ();                    while (It.hasnext ()) {//Gets the corresponding set element good g= (good) it.next ();                    Determines if (G.getbo ()) {//Removes the element returned by the last next method from the collection It.remove ();                 }}//Refresh adapter.notifydatasetchanged ();                 num = 0;                 pric = 0;            Display Price.settext ("+num+" is selected, "+" Price is "+pric+");        }        }); The listener that binds the ListView Listview.setonitemclicklistener (new Onitemclicklistener () {public void Onitemclick (A Dapterview<?> arg0, View arg1, int arg2, long arg3) {//TODO auto-generated Metho D stub//Get Viewholder object Viewholder Viewholder = (viewholder) Arg1.gettag ();                 Change the status of the CheckBox ViewHolder.checkBox.toggle ();                 Record the check status of the CheckBox List.get (arg2). Setbo (viewHolder.checkBox.isChecked ());                      Adjusts the selected entry if (viewHolder.checkBox.isChecked () = = true) {num++;                    Pric+=integer.parseint (List.get (arg2). GetName ());                      } else {num--;                    Pric-=integer.parseint (List.get (arg2). GetName ());            }//With TextView display Price.settext ("+num+"), "+" Price is "+pric+" yuan);            }        }); }    }

List of Vo class Good.java

Package Com.bawei.vo;public class Good {private String name;private boolean bo;public string GetName () {    return name;} public void SetName (String name) {    this.name = name;} public Boolean Getbo () {    return bo;} public void Setbo (Boolean bo) {    this.bo = bo;} @Overridepublic String toString () {    return "good [name=" + name + ", bo=" + Bo + "]";} Public good (String name, Boolean bo) {    super ();    this.name = name;    This.bo = Bo;} Public good () {    super ();}}

Fitting Adper.java

Package Com.bawei.day04_listview;import Java.util.list;import Com.bawei.vo.good;import android.content.Context; Import Android.view.view;import Android.view.view.onclicklistener;import Android.view.viewgroup;import Android.widget.baseadapter;import Android.widget.button;import Android.widget.checkbox;import Android.widget.compoundbutton;import Android.widget.compoundbutton.oncheckedchangelistener;import    Android.widget.textview;public class Adper extends Baseadapter {list<good> List;        Context context;    Public Adper (list<good> List, Context context) {//TODO auto-generated constructor stub this.list=list;            This.context=context;    } public int GetCount () {//TODO auto-generated Method stub return List.size ();    } public Object GetItem (int position) {//TODO auto-generated method stub return null;    } public long Getitemid (int position) {//TODO auto-generated method stub return 0;    }Public View GetView (final int position, View Convertview, ViewGroup parent) {//TODO auto-generated method stub        Final Viewholder Viewholder;         if (convertview==null) {convertview=view.inflate (context, r.layout.listveiw, null);         Viewholder=new Viewholder ();        viewholder.textview= (TextView) Convertview.findviewbyid (R.id.text);         viewholder.checkbox= (CheckBox) Convertview.findviewbyid (R.id.checkbox);        Convertview.settag (Viewholder);        }else{viewholder= (Viewholder) Convertview.gettag ();                } viewHolder.textView.setText ("Price:" +list.get (position). GetName ());                Displays the CheckBox viewHolder.checkBox.setChecked (list.get (position). GETBO ());            return convertview;    }class viewholder{TextView TextView; checkbox checkbox;}}

　　

CheckBox Select all, reverse, calculate price, delete