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;  
        }  
          
    }  
}