我可以使用共享首选项存储复选框的值，但是一旦滚动列表视图，复选框就会再次取消选中。我无法理解造成这种情况的原因。很想听听你的建议。
这是我的代码：
ListViewAdapter.java
package com.example.logintest;
import java.util.List;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class ListViewAdapter extends BaseAdapter{
private Context _context;
private List<String[]> list;
ViewHolder holder=null;
View row=null;
String cbstate;
public ListViewAdapter(Context _context,List<String[]> list)
{
this._context=_context;
this.list=list;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return list.get(arg0);
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
private static class ViewHolder
{
public TextView textView;
public ImageView imageview;
public CheckBox cb;
public ViewHolder(View row) {
// TODO Auto-generated constructor stub
textView = (TextView) row.findViewById(R.id.textView);
cb = (CheckBox) row.findViewById(R.id.cb);
imageview = (ImageView)row.findViewById(R.id.imageView);
}
}
public View getView(final int position, View convertView, ViewGroup viewGroup) {
// TODO Auto-generated method stub
SharedPreferences state = _context.getSharedPreferences("data",Context.MODE_PRIVATE);
row=convertView;
holder=null;
try{
if(row==null)
{
LayoutInflater inflater = (LayoutInflater) _context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.row, viewGroup, false);
holder=new ViewHolder(row);
row.setTag(holder);
Log.d("newrow", "New row");
////////////////////////////////////////////////////////////////////////
holder.textView.setText(list.get(position)[0].toString());
//images entered here0
if(position==0)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.one)) ;
}
else if(position==1)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.two)) ;
}
else if(position==2)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.three)) ;
}
else if(position==3)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.four)) ;
}
else if(position==4)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.five)) ;
}
else if(position==5)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.six)) ;
}
else if(position==6)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.seven)) ;
}
else if(position==7)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.eight)) ;
}
else if(position==8)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.nine)) ;
}
else if(position==9)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.ten)) ;
}
else if(position==10)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.eleven)) ;
}
else if(position==11)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.tweleve)) ;
}
else if(position==12)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.thirteen)) ;
}
else if(position==13)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.fourteen)) ;
}
else if(position==14)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.fifteen)) ;
}
else if(position==15)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.sixteen)) ;
}
else if(position==16)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.seventeen)) ;
}
else if(position==17)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.eighteen)) ;
}
else if(position==18)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.nineteen)) ;
}
else if(position==19)
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.twenty)) ;
}
else
{
holder.imageview.setImageDrawable( _context.getResources().getDrawable(R.drawable.ic_launcher)) ;
}
//checkbox functions
//Here we can do changes to the convertView, such as set a text on a TextView
//or an image on an ImageView.
//return convertView;
}
else
{
holder= (ViewHolder) row.getTag();
Log.d("recycle", "Recycling stuff");
}
final SharedPreferences.Editor editor = state.edit();
holder.cb.setChecked(state.getBoolean("CheckValue"+position,holder.cb.isChecked() ));
holder.cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//Handle your conditions here
editor.putBoolean("CheckValue"+position, holder.cb.isChecked());
editor.commit();
Toast.makeText(_context,"checkbox:"+position,Toast.LENGTH_LONG).show();
}
});
holder.cb.setTag(position);
//changing color of items alternatively
if (position % 2 == 0) {
row.setBackgroundColor(Color.parseColor("#58D3F7"));
} else {
row.setBackgroundColor(Color.parseColor("#F5F6CE"));
}
}
catch(Exception e)
{
e.printStackTrace();
}
return row;
}
}
答案 0 :(得分：0)
将这些添加到适配器的方法中。我希望这会对你有所帮助。
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}