android中多个CheckBox（已超过整个屏幕）全选和反选问题

2011-06-27 10:29:25 868 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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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？

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sam-007

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切换为时间正序

zdl_zxl 2013-09-26

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你把缓存的那个去掉吧，应该是缓存的问题

wc7253027 2011-06-29

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额。。终于看得见自己的回复了

sam-007 2011-06-29

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我知道重写Adapter，我也实现了功能。只有这种解决方法吗？

思考的芦苇 2011-06-29

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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;   

        }   

    }  

}

wl076 2011-06-29

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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();

		}

	}