android中多个CheckBox（已超过整个屏幕）全选和反选问题

[sam-007]

android中ListView下多个CheckBox全选问题，如果CheckBox的个数超过一屏，则会出现部分被选中，部分未被选中的问题，请问高手如何解决？

[pby_bob]

这个问题，我还没遇到过

[儿大不由爷]

这是不就是记录一个状态么？肯定是状态没置上的原因。

[passself]

在一个group里面也会出这个问题？

[soclays]

把你的全选反选的代码贴上来看看吧
主要是看Adapter里怎么处理

最笨的办法：用ListView实例的方法去找到子的checkbox实例，然后挨个置上，应该没问题的

[sam-007]

checkbox的多少是根据数据库中数据的记录多少来自动生成的。在不重写Adapter的情况下是否可以解决这个问题？

[seener_wal]

还没有遇到全屏CheckBox的 完了试试看

[sam-007]

请各位支点招吧！

[yxmsw2007]

http://download.csdn.net/source/3120614这就是你要的

[wl076]

需要自定义ListView的MyAdapter

/*
	 * 自定义ListView的MyAdapter
	 */
	public final class ViewHolder {
		public TextView iid;
		public EditText info;
		public CheckBox cbx;
		public ImageView img;

	}

	Set<Object> selectedSet = new HashSet<Object>();  //重点

	public class MyAdapter extends BaseAdapter {

		private LayoutInflater mInflater;

		public MyAdapter(Context context) {
			this.mInflater = LayoutInflater.from(context);
		}

		@Override
		public int getCount() {
			return mData.size();
		}

		@Override
		public Object getItem(int position) {
			return mData.get(position);
		}

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

		@Override
		public View getView(final int position, View convertView,
				ViewGroup parent) {

			ViewHolder holder = null;
			if (convertView == null) {

				holder = new ViewHolder();

				convertView = mInflater.inflate(R.layout.marklist, null);
				holder.iid = (TextView) convertView.findViewById(R.id.iid);
				holder.info = (EditText) convertView.findViewById(R.id.info);

				holder.cbx = (CheckBox) convertView.findViewById(R.id.cbx);

				holder.img = (ImageView) convertView.findViewById(R.id.img);
				convertView.setTag(holder);

			} else {

				holder = (ViewHolder) convertView.getTag();
			}

			holder.iid.setText(String.valueOf(mData.get(position).get("iid")));
			holder.info.setText((String) mData.get(position).get("info"));

			int resid = (Integer) mData.get(position).get("img");
			if (resid != 0)
				holder.img.setBackgroundResource(resid);

                        holder.info.setText(mData.get(position).toString());

                        //重点开始
			Object b = (Object) getItem(position);
			if (b != null) {
				if (selectedSet.contains(b)) {
					holder.cbx.setChecked(true);
				} else {
					holder.cbx.setChecked(false);
				}

			}

			
			holder.cbx.setOnClickListener(new View.OnClickListener() {
				@Override
				public void onClick(View v) {
					CheckBox cb = (CheckBox) v;
					if (cb.isChecked()) {
						selectedSet.add((Object) getItem(position));
					} else {
						selectedSet.remove((Object) getItem(position));
					}
				}
			});
                        //重点结束
			holder.info.setOnClickListener(new View.OnClickListener() {
				@Override
				public void onClick(View arg0) {
				}
			});

			return convertView;
		}

		@Override
		public void notifyDataSetChanged() {
			// TODO Auto-generated method stub
			super.notifyDataSetChanged();
		}
	}

不懂的可以问我

[思考的芦苇]

下面是我以前看的一个例子,这个应该能解决你的问题吧:

package com.listViewTest;

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.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class ListViewTest extends ListActivity {
	/** Called when the activity is first created. */  
    Context context = null;   
    List<Integer> list = new ArrayList<Integer>();
    CheckBox checkbox;
	private LinearLayout lr;
    
    @Override  
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);   
        setContentView(R.layout.main);   
        context = getApplicationContext();   
        setListAdapter(new MyListAdapter());   
    }   
    
    @Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		// TODO Auto-generated method stub
		super.onListItemClick(l, v, position, id);
		lr = (LinearLayout) v;
		checkbox = (CheckBox) lr.getChildAt(1);
		if (list.contains(new Integer(position))) {
			checkbox.setChecked(false);
			list.remove(new Integer(position));
		}else {
			checkbox.setChecked(true);
			list.add(new Integer(position));
		}
	}
    
	class MyListAdapter extends BaseAdapter{   
        String data[] = new String[]{"apple", "pear", "banana", "orange","apple", "pear", "banana", "orange","apple", "pear", "banana", "orange"};   
        public int getCount() {   
            // TODO Auto-generated method stub   
            return data.length;   
        }   
  
        public Object getItem(int position) {   
            // TODO Auto-generated method stub   
            return data[position];   
        }   
  
        public long getItemId(int position) {   
            // TODO Auto-generated method stub   
            return position;   
        }   
  
        public View getView(int position, View convertView, ViewGroup parent) {   
            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);   
            checkbox   =   (CheckBox)convertView.findViewById(R.id.checkstatus);   
            checkbox.setTag(new Integer(position));   
            text.setText(data[position]);   
            if (list != null) {
            	checkbox.setChecked((list.contains(new Integer(position)))); 
			} else {
				checkbox.setChecked(false);   
			}
            return convertView;   
        }   
    }  
}

[sam-007]

我知道重写Adapter，我也实现了功能。只有这种解决方法吗？

[wc7253027]

额。。终于看得见自己的回复了

[zdl_zxl]

你把缓存的那个去掉吧，应该是缓存的问题