【android】使用checkedTextView形成自定义ListView（续）

前面的已经介绍了如何将check选中，但是很不尽如人意的是，每次listView都会调用getView方法来刷新页面，所以导致之前选中的check会在调用getView之后会被取消。
通过：http://blog.csdn.net/whucyl/article/details/7341133
上面的提示对部件进行了重写。
使用一个select的方法，监听选中是否，然后加入一个hashmap，用来保存每次用户选中的状态，每次getView的查看此状态即可。
一下是代码：
MyAdapter方法：

package com.duduli.li;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.content.Context;
import android.database.Cursor;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.CheckedTextView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;

public class MyAdapter extends SimpleCursorAdapter{
	 private List list = new ArrayList();
	 private HashMap<Integer, Boolean> isSelected = null; 
	 public String s[];
	 private List<Map<String, Object>> data;   
	 private LayoutInflater layoutInflater;   
	 private List<String> delNumber = new ArrayList<String>();
	 @SuppressWarnings("unused")
	 private Context context; 
	 public MyAdapter(Context context, int layout, Cursor c,
				String[] from, int[] to) {  
		 super(context, layout, c, from, to);
	        this.context = context;   
	        this.data = getData();   
	        this.layoutInflater = LayoutInflater.from(context);
	        isSelected = new HashMap<Integer, Boolean>();
	    }  
	 
	 
	 @Override
		public int getCount() {
			// TODO Auto-generated method stub
			return super.getCount();
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return super.getItem(position);
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return super.getItemId(position);
		}

		
	@SuppressWarnings("unused")
	@Override
	public View getView(final int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
	
		
		
		
		Compan cp = null;
		if(cp == null){
			cp = new Compan();
			convertView = layoutInflater.inflate(R.layout.list, null);
			cp.id = (TextView) convertView.findViewById(R.id._id);
			cp.ctv =  (CheckedTextView) convertView.findViewById(R.id.checkText);
			
			
			convertView.setTag(cp);
		}else{
			cp = (Compan) convertView.getTag();
		}
		cp.id.setText((CharSequence) data.get(position).get("_id"));
		cp.ctv.setText((CharSequence) data.get(position).get("Number"));
//		[b]此处即为状态保存的方法！[/b]
		Boolean b = isSelected.get(position);
		if(null == b){
			b = false;
		}
		
		if (convertView instanceof ViewGroup) {  
            ViewGroup g = (ViewGroup) convertView;  
            for (int i = 0; i < g.getChildCount(); i++) {  
                View v = g.getChildAt(i);  
                if (v instanceof CheckedTextView) {  
                    ((CheckedTextView) v).setChecked(b);  
                    break;  
                }  
            }  
        }  
		
		
		return convertView;
	}
	



	public List<Map<String, Object>> getData() {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

		while (getCursor().moveToNext()) {
			Map<String, Object> map = new HashMap<String, Object>();
			// System.out.println("ID: "+getCursor().getString(0));
			map.put("_id", getCursor().getString(0));
			// System.out.println("NAME: "+getCursor().getString(1));
			map.put("Number", getCursor().getString(1));
			list.add(map);
		}

		return list;
	}
//	选中加入hashmap
	public void select(int postion, boolean isChecked) {  
        isSelected.put(postion, isChecked);  
    } 

}

然后Activity：

package com.duduli.li;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.CheckedTextView;
import android.widget.ListView;

import com.duduli.db.AllowCallDAO;

	/**
	 * This example shows how to use choice mode on a list. This list is 
	 * in CHOICE_MODE_MULTIPLE mode, which means the items behave like
	 * checkboxes.
	 */
	public class CallComingTest2Activity extends ListActivity {
		private CheckedTextView multiple;
	    @Override
	    public void onCreate(Bundle savedInstanceState) {
	        super.onCreate(savedInstanceState);
	        AllowCallDAO dao = new AllowCallDAO(this);
	        MyAdapter adapter = new MyAdapter(this, R.layout.list, dao.show()
	        		, new String[]{"_id","phonenr"}, new int[]{R.id._id,R.id.checkText});
	        
	        

	        
	        final ListView listView = getListView();
	        
	        listView.setItemsCanFocus(false);
	        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
	        setListAdapter(adapter);

	    
	    }


		@Override
		protected void onListItemClick(ListView l, View v, int position, long id) {
			// TODO Auto-generated method stub
			System.out.println(position);

			
			multiple = (CheckedTextView)v.findViewById(R.id.checkText);
	        if (multiple != null) {  
	        	multiple.toggle();  
	            ((MyAdapter) l.getAdapter()).select(position, multiple.isChecked());  
	        }   
	        
	        
			if(multiple.isChecked()){
//				getListView().getItemAtPosition(position);
				System.out.println("check");
			}else{
				System.out.println("not check");
			}

		}





	}

评论

2 楼 duduli 2012-07-18  

yangzhihui_1171 写道

AllowCallDAO,这个类从哪来啊?

package com.duduli.db;

import java.util.List;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;


public class AllowCallDAO {
	private SQLiteDatabase db;
	private DBHelper dbh;
	public AllowCallDAO(Context context){
		dbh = new DBHelper(context);
	}
	
	
	
	
	public void add(String number){
		db = dbh.getWritableDatabase();
		ContentValues cv = new ContentValues();
//		cv.put("phonenr", ac.getPhonenr());
		cv.put("phonenr", number);
		db.insert("allowcall", null, cv);
//		db.close();
	}
	
	
	public Cursor show(){
		db = dbh.getReadableDatabase();
		Cursor cur = db.query("allowcall",null, null, null, null, null, null);
		System.out.println("show get the cursor count is "+cur.getCount());
//		db.close();
		return cur;
	}
	
	public void delete(List list){
		db = dbh.getWritableDatabase();
		for(int i=0; i<list.size(); i++){
			System.out.println("delete id is "+list.get(i));
			db.delete("allowcall", "_id=?", new String[]{(String) list.get(i)});
		}
//		db.close();
	}

	
	public void dbClose(){
		db.close();
		dbh.close();
	}
}

1 楼 yangzhihui_1171 2012-07-05  

AllowCallDAO,这个类从哪来啊?