https://stackoverflow.com/questions/20718500
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I picked the solution from Romain Guy's solution @
https://groups.google.com/forum/?fromgroups#!topic/android-developers/No0LrgJ6q2M
I have used a ViewHolder pattern for smooth scrolling and performance. I have used a SparseBooleanArray to get checked items.
I assume you want the items whose corresponding check boxes are checked.
Also check this to understand listview re-cycles views
How ListView's recycling mechanism works
public class dsds extends Activity
{
ListView lv;
String result = null;
StringTokenizer2 token = null,token2=null;;
ArrayList<String> value,value2 = null;
ArrayList<String> str = null;
ArrayList<String> str2 = null;
ArrayList<String> newstatus=null;
Hashtable<Integer, String> checkstatus=null;
ArrayList<String>stateId=null;
StringBuffer tru,fals;
private SparseBooleanArray mCheckStates;
String z;
ArrayList<Holder> ha = new ArrayList<Holder>();
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.text);
str2 = new ArrayList<String>();
stateId = new ArrayList<String>();
newstatus=new ArrayList<String>();
lv = (ListView) findViewById(R.id.listView1);
Button b= (Button) findViewById(R.id.button1);
new TheTask().execute();
b.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v) {
StringBuilder result = new StringBuilder();
for(int i=0;i<str2.size();i++)
{
if(mCheckStates.get(i)==true)
{
result.append(str2.get(i));
result.append("\n");
}
}
Toast.makeText(dsds.this, result, 1000).show();
}
});
}
class TheTask extends AsyncTask<Void,Void,Void>
{
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
HttpClient httpclient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
HttpGet request = new HttpGet("http://mobileapps.iwedplanner.com/mobileapps/iwedplanner/mobile/version21/mmealitems.aspx?uname=abcdefg&occasion=Engagement");
try
{
HttpResponse response = httpclient.execute(request);
HttpEntity resEntity = response.getEntity();
String _response=EntityUtils.toString(resEntity);
if (_response != null)
{
//alertbox("",result);
String[] mystring = _response.split("<br>"); // splt by break
token = new StringTokenizer2(mystring[0], "|", false);// split by |
token2 = new StringTokenizer2(mystring[1], "|", false);
}
/////// for veg
value = new ArrayList<String>();
while (token.hasMoreTokens())
{
value.add(token.nextToken());
}
for(int i=1;i<value.size()-1;i=i+3)
{
// Log.i("....Veg ids.......",""+value.get(i));
stateId.add(value.get(i));
}
for(int i=2;i<value.size()-1;i=i+3)
{
str2.add(value.get(i));
// Log.i("....Veg ids.......",""+value.get(i));
}
for(int i=3;i<=value.size()-1;i=i+3)
{
newstatus.add(value.get(i));
// Log.i("....Veg ids.......",""+value.get(i));
}
// add all to list of Holder
for(int h=0;h<str2.size();h++)
{
Holder holder = new Holder();
holder.setTitle(str2.get(h));
holder.setId(stateId.get(h));
if(newstatus.get(h).equals("False"))
{
holder.setCheck(true);
}
else
{
holder.setCheck(false);
}
ha.add(holder);
}
}catch(Exception e)
{
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
lv.setAdapter(new IconicAdapter(dsds.this));
}
}
@SuppressWarnings("rawtypes")
class IconicAdapter extends ArrayAdapter implements CompoundButton.OnCheckedChangeListener
{
Activity context;
LayoutInflater mInflater;
@SuppressWarnings("unchecked")
IconicAdapter(Activity context)
{
super(context, R.layout.list_item, str2);
mCheckStates = new SparseBooleanArray(str2.size());
mInflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
if(convertView==null)
{
convertView=mInflater.inflate(R.layout.list_item,parent,false);
holder = new ViewHolder();
holder.tv1 = (TextView) convertView.findViewById(R.id.textView1);
holder.tv2 = (TextView) convertView.findViewById(R.id.textView2);
holder.cb = (CheckBox) convertView.findViewById(R.id.checkBox1);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
Holder hol = ha.get(position);
holder.tv1.setText(hol.getId().toString());
holder.tv2.setText(hol.getTitle().toString());
if(hol.isCheck()==true)
{
holder.cb.setChecked(mCheckStates.get(position, true));
holder.cb.setTag(position);
}
else
{
holder.cb.setChecked(mCheckStates.get(position, false));
holder.cb.setTag(position);
}
holder.cb.setOnCheckedChangeListener(this);
return convertView;
}
public boolean isChecked(int position) {
return mCheckStates.get(position, false);
}
public void setChecked(int position, boolean isChecked) {
mCheckStates.put(position, isChecked);
}
public void toggle(int position) {
setChecked(position, !isChecked(position));
}
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mCheckStates.put((Integer) buttonView.getTag(), isChecked);
}
}
static class ViewHolder
{
TextView tv1,tv2;
CheckBox cb;
}
}
Holder class
public class Holder {
String title;
String id;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
boolean check;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public boolean isCheck() {
return check;
}
public void setCheck(boolean check) {
this.check = check;
}
}
text.xml
<?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" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="Button" />
<ListView
android:id="@+id/listView1"
android:layout_above="@id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" >
</ListView>
</RelativeLayout>
list_tiem.xml
<?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/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="33dp"
android:layout_marginTop="40dp"
android:text="TextView" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textView1"
android:layout_centerHorizontal="true"
android:text="TextView" />
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView2"
android:layout_alignBottom="@+id/textView2"
android:layout_alignParentRight="true"
android:text="CheckBox" />
</RelativeLayout>
Snap
Now 1 and 2 are checked and when you click the button at the bottom you see the selected text. I checked 1 and 2 manually. However it depends on the response ie True or False. Right now all veg items are true.
Note: The list displays only veg items
