Question

如何在ListView中添加CheckBox

Answer 1

package com.billy.demo;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import android.widget.CompoundButton.OnCheckedChangeListener;
public class TestListViewAndCheckbox extends ListActivity {
    /** Called when the activity is first created. */
    Context context = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        context = getApplicationContext();
        setListAdapter(new MyListAdapter());
    }
    
    class MyListAdapter extends BaseAdapter{
        String data[] = new String[]{"apple", "pear", "banana", "orange","apple", "pear", "banana", "orange","apple", "pear", "banana", "orange"};
        List<Integer> checkPosition = new ArrayList<Integer>(data.length);
        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return data.length;
        }
        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return data[position];
        }
        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            if (null == convertView){
                LayoutInflater inflater      = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.list_item, parent, false);
            }
            TextView text       =   (TextView)convertView.findViewById(R.id.info);
            final CheckBox checkbox   =   (CheckBox)convertView.findViewById(R.id.checkstatus);
            checkbox.setTag(new Integer(position));
            text.setText(data[position]);
            if (checkPosition != null){
                checkbox.setChecked((checkPosition.contains(new Integer(position)) ? true : false)); 
            }else{
                checkbox.setChecked(false); 
            }
            
            checkbox
            .setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView,
                        boolean isChecked) {
                    // TODO Auto-generated method stub
                    if (isChecked){
                        if (!checkPosition.contains(checkbox.getTag())){
                            checkPosition.add((Integer)checkbox.getTag());
                        }
                    }else{
                        if (checkPosition.contains(checkbox.getTag())){
                            checkPosition.remove(checkbox.getTag());
                        }
                    }
                }
            });
            return convertView;
        }
        
    }
}