Android get text of all checked checkboxes in listView

hello i have created a listview with checkboxes in it... but i dont know how to get the check box text which are selected.. here is the code of activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="top"
    android:orientation="vertical"
    tools:context=".MygamesActivity" >

    <ListView
        android:id="@android:id/list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_marginTop="20dp" />

</LinearLayout>

another layout which has checkboxes to show in the listview main.list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android">
    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="CheckBox"
         />
</LinearLayout>

and this is the class that extends arrayadapter

package com.wasiff.listview;

import android.content.Context;
import android.content.res.TypedArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;


public class CheckboxAdapter extends ArrayAdapter<String> {
    private LayoutInflater mInflater;

    private String[] mStrings;
    private TypedArray mIcons;
    private int mViewResourceId;

    public CheckboxAdapter(Context ctx,int viewResourceId,String[] strings){
        super(ctx,viewResourceId,strings);

        mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        mStrings = strings;

        mViewResourceId = viewResourceId;
    }

    public int getCount(){
        return mStrings.length;
    }

    public String getItem(int position){
        return mStrings[position];
    }

    public long getItemId(int position){
        return 0;
    }

    public View getView(int position,View convertView,ViewGroup parent){
        convertView = mInflater.inflate(mViewResourceId, null);

        CheckBox tv = (CheckBox)convertView.findViewById(R.id.checkBox1);
        tv.setText(mStrings[position]);

        return convertView;
    }
}

and this is my mainActivity class

package com.wasiff.listview;

import android.app.ListActivity;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;

public class MainActivity extends ListActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Context ctx = getApplicationContext();
        Resources res = ctx.getResources();

        String[] options = res.getStringArray(R.array.countrynames);

        setListAdapter((ListAdapter) new CheckboxAdapter(ctx,R.layout.main_list_item,options));

    }



    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

and finally i have all the countries saved in a countries.xml file on values folder

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="countrynames" translatable="false">
        <item>Bhutan</item>
        <item>Colombia</item>
        <item>India</item>
        <item>Pakistan</item>
        <item>Australia</item>
        <item>Srilanka</item>
        <item>England</item>
    </string-array>
</resources>

it shows the check boxes in the listView now what i want is to get the text of the checkboxes which are checked and show in a toast on a button click(to test) i followed the tutorial on android cookbook by oreilly but still i dont know how to set the listener

Answers


Add inside CheckboxAdapter.java

ArrayList<String> selectedStrings = new ArrayList<String>();

Then inside getView method

tv.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked) {
                    selectedStrings.add(tv.getText().toString());
                }else{
                    selectedStrings.remove(tv.getText().toString());
                }

            }
        });

Write a getter which will return selectedStrings

ArrayList<String> getSelectedString(){
  return selectedStrings;
}

May be this will helped you:

CheckBox cb;
    ListView mainListView = getListView();
    for (int x = 0; x<mainListView.getChildCount();x++){
        cb = (CheckBox)mainListView.getChildAt(x).findViewById(R.id.myCheckBox);
        if(cb.isChecked()){
            doSomething();
        }
    }

On approach could be to pass a own object to your Arrayadapter:

class ArrayItem{
    private String text;
    private boolean checked;
    ... (getter/setter)
}

and just get the used Array back from Arrayadapter and read it.

Arrayadaper...{

    public ArrayList<ArrayItem> getList(){ 
        return this.arrayList;
    }

    public View getView(int position,View convertView,ViewGroup parent){
        ArrayItem item = this.arrayList.get(position)
        convertView = mInflater.inflate(mViewResourceId, null);

        CheckBox tv = (CheckBox)convertView.findViewById(R.id.checkBox1);
        tv.setCheckChangeListener... //item.setChecked(true:false)
        tv.setText(mStrings[position]);

        return convertView;
    }
}


}

You can loop through the List and just manipulate the items where checked == true

Hope this helps.


SparseBooleanArray checked = listView1.getCheckedItemPositions();
                ArrayList<String> selectedItems = new ArrayList<String>();

                for (int i = 0; i < len; i++) {
                    if (checked.get(i))
                        selectedItems.add((String) adapter.getItem(i));
                }
                String[] outputStrArr = new String[selectedItems.size()];

                for (int i = 0; i < selectedItems.size(); i++) {
                    outputStrArr[i] = selectedItems.get(i);
                }

ListView listView = findViewById(R.id.listView);

listView.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);

arrayAdapter = new ArrayAdapter(this,android.R.layout.simple_list_item_checked,userlist);
listView.setAdapter(arrayAdapter);

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
        CheckedTextView checkedTextView= (CheckedTextView)view;
        if(checkedTextView.isChecked()){
            Log.i("info","CHECKED");
        }
        else{
            Log.i("info","UNCHECKED");
        }
    }
});

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