androd ListView + CheckBox 解决超出一屏无法全选的问题。

直接上代码　　主要思路是修改List<String[]>中的值。

Activity类

package com.test.listact;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

public class ListSelectAllTestActivity extends Activity {

    private ListView mListView ;
    private Button   selBtn,selectedBtn;
    private SelectAdapter myAdapter;
    private boolean isSelectAll = false;
    private List<String[]> data = null;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mListView = (ListView)findViewById(R.id.listview);
        
        data = getData();
        
        myAdapter = new SelectAdapter(this,data);
               
        mListView.setAdapter(myAdapter);
        
        selBtn = (Button)findViewById(R.id.selBtn);
        
        selBtn.setOnClickListener(new Button.OnClickListener(){
            public void onClick(View arg0) {
                if(isSelectAll){
                    myAdapter.cancelAll();
                    isSelectAll = false;
                }else{
                    myAdapter.selectAll();
                    isSelectAll = true;
                }
            }
        });
        
        selectedBtn = (Button)findViewById(R.id.selectedBtn);
        selectedBtn.setOnClickListener(new Button.OnClickListener(){
            public void onClick(View arg0) {
                if(data!=null){
                    String []d;
                    int select = 0,cancel = 0;
                    for(String [] dd:data){
                        if(!dd[1].equals("0")){　// '0' 代表未选中
                            select++;
                        }else{
                            cancel++;
                        }
                    }
                    Toast.makeText(ListSelectAllTestActivity.this, "选中数:"+select +"\t未选中数:"+cancel,Toast.LENGTH_LONG).show();
                }
            }
        });
    }
    
    private List<String[]> getData(){
        List<String[]> list = new ArrayList<String[]>();
        for(int i = 0;i<20;i++){
            String [] data = new String[2];
            data[0] = "Hello" + (i+1);
            data[1] = "0";
            list.add(data);
        }
        return list;
    }
    
}

Adapter 类，主要逻辑在这里

package com.test.listact;

import java.util.List;

import android.content.Context;
import android.util.Log;
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;

public class SelectAdapter extends BaseAdapter {
    
    
    private LayoutInflater mInflater;
    private Context mContext;
    private List <String[]> mList;
    
    public SelectAdapter(Context mContext,List <String[]> mlist){
        this.mList = mlist;
        this.mContext = mContext;
        this.mInflater = LayoutInflater.from(mContext);
    }

    public int getCount() {
        return mList.size();
    }

    public Object getItem(int arg0) {
        return mList.get(arg0);
    }

    public long getItemId(int arg0) {
        return arg0;
    }

    public View getView(int position, View view, ViewGroup parent) {
        ViewHold mViewHold;
        if(view == null){            
            Log.d("","View  VVVVV");            
            mViewHold = new ViewHold();
            view = mInflater.inflate(R.layout.item,null);
            mViewHold.mTextView = (TextView)view.findViewById(R.id.label);
            mViewHold.mCheckBox = (CheckBox)view.findViewById(R.id.labelCheckBox);
            view.setTag(mViewHold);
        }else{
            mViewHold = (ViewHold)view.getTag();
            Log.d("","View  VVVVVEEEEEEEEEE");
        }
        
        String data[] = mList.get(position);
        mViewHold.mTextView.setText(data[0]);
        
        String isSelected = data[1];

        mViewHold.mCheckBox.setId(position);
        mViewHold.mCheckBox.setChecked(!isSelected.equals("0"));    
        
        //点击时把值修改下
        mViewHold.mCheckBox.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener(){

            public void onCheckedChanged(CompoundButton buttonView,    boolean isChecked) {
                
                String dat[] = mList.get(buttonView.getId());
                dat[1] = isChecked?"1":"0";                
                mList.set(buttonView.getId(), dat);
            }
            
        });
        
        
        
        return view;
    }
    //全选
    public void selectAll(){
        if(mList!=null){
            for(int i=0;i<mList.size();i++){
                mList.get(i)[1] = "1";
            }
            this.notifyDataSetChanged();
        }
    }
    //取消全选
    public void cancelAll(){
        if(mList!=null){
            for(int i=0;i<mList.size();i++){
                mList.get(i)[1] = "0";
            }
            this.notifyDataSetChanged();
        }
    }
    
    
    class ViewHold {
        public TextView mTextView;
        public CheckBox mCheckBox;
    }

}

XML文件这里就省略了。。。