Checkbox unchecked when I scroll listview on Android -

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i new android development. created listview textbox , checkbox.

when check checkbox , scroll down check other items in list view, older ones unchecked.

how avoid problem in listview? please guide me code.

here code:

main.xml:

<?xml version="1.0" encoding="utf-8"?> <linearlayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:orientation="vertical"     android:layout_width="fill_parent"     android:layout_height="fill_parent">      <textview         android:id="@+id/textview01"         android:layout_height="wrap_content"         android:text="list of items"         android:textstyle="normal|bold"         android:gravity="center_vertical|center_horizontal"         android:layout_width="fill_parent"/>      <listview         android:id="@+id/listview01"         android:layout_height="250px"         android:layout_width="fill_parent"/>      <button         android:text="save"         android:id="@+id/btnsave"         android:layout_width="wrap_content"         android:layout_height="wrap_content"/>  </linearlayout>

this xml page used create dynamic list row:

listview.xml:

<?xml version="1.0" encoding="utf-8"?> <linearlayout     xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_height="wrap_content"     android:gravity="left|center"     android:layout_width="wrap_content"     android:paddingbottom="5px"     android:paddingtop="5px"     android:paddingleft="5px">      <textview         android:id="@+id/textview01"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:gravity="center"         android:textcolor="#ffff00"         android:text="hi"/>      <textview         android:text="hello"         android:id="@+id/textview02"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_marginleft="10px"         android:textcolor="#0099cc"/>      <edittext         android:id="@+id/txtbox"         android:layout_width="120px"         android:layout_height="wrap_content"         android:textsize="12sp"         android:layout_x="211px"         android:layout_y="13px"/>      <checkbox         android:id="@+id/chkbox1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"/>  </linearlayout>

this activity class.

customlistviewactivity.java:

public class customlistviewactivity extends activity {      listview lstview;     static context mcontext;     button btnsave;      private static class efficientadapter extends baseadapter {         private layoutinflater minflater;          public efficientadapter(context context) {             minflater = layoutinflater.from(context);          }          public int getcount() {             return country.length;         }          public object getitem(int position) {             return position;         }          public long getitemid(int position) {             return position;         }          public view getview(int position, view convertview, viewgroup parent) {             final viewholder holder;             if (convertview == null) {                 convertview = minflater.inflate(r.layout.listview, parent,                         false);                 holder = new viewholder();                 holder.text = (textview) convertview                         .findviewbyid(r.id.textview01);                 holder.text2 = (textview) convertview                         .findviewbyid(r.id.textview02);                 holder.txt = (edittext) convertview.findviewbyid(r.id.txtbox);                 holder.cbox = (checkbox) convertview.findviewbyid(r.id.chkbox1);                  convertview.settag(holder);             }             else {                 holder = (viewholder) convertview.gettag();             }              holder.text.settext(curr[position]);             holder.text2.settext(country[position]);             holder.txt.settext("");             holder.cbox.setchecked(false);              return convertview;         }          public class viewholder {             textview text;             textview text2;             edittext txt;             checkbox cbox;         }     }      @override     public void oncreate(bundle savedinstancestate) {          super.oncreate(savedinstancestate);         setcontentview(r.layout.main);         lstview = (listview) findviewbyid(r.id.listview01);         lstview.setadapter(new efficientadapter(this));         btnsave = (button)findviewbyid(r.id.btnsave);         mcontext = this;          btnsave.setonclicklistener(new view.onclicklistener() {              @override             public void onclick(view v) {                 // want print text in listview 1 one.                 // later insert in database.                 //                 //            toast.maketext(getbasecontext(), "edittext value, checkbox value , other values", toast.length_short).show();                 (int = 0; < lstview.getcount(); i++) {                     view listorderview;                     listorderview = lstview.getchildat(i);                     try{                         edittext txtamt = (edittext)listorderview.findviewbyid(r.id.txtbox);                         checkbox cbvalue = (checkbox)listorderview.findviewbyid(r.id.chkbox1);                         if(cbvalue.ischecked()== true){                             string amt = txtamt.gettext().tostring();                             toast.maketext(getbasecontext(), "amount :"+amt, toast.length_short).show();                         }                      }                     catch (exception e) {                         // todo: handle exception                     }                 }              }         });     }      private static final string[] country = { "item1", "item2", "item3",         "item4", "item5", "item6","item7", "item8", "item9",         "item10", "item11", "item12" };      private static final string[] curr = { "1", "2", "3", "4", "5", "6","7", "8", "9", "10", "11", "12" }; }

please me solve problem.

i have referred problem in many places. not proper answer solve problem.

please provide me code avoid unchecking checkbox while scrolling , down.

in custom listview adapter call setchecked after calling setoncheckedchangelistener.

this way sever link old listener recycled view.


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