android - 如何在listView中获取与android中所选复选框相对应的textView字段的值

Question

我有一个listView有 3 个textViews字段和一个check boxin ever row.<br> 如果选择或选中一个特定checkBox的，那么如何访问与textViews选中对应的该行中的详细信息（或相应的值）check box？

Answer 1

这个解决方案对我有用。

在 BaseAdapter 类下的 Your View getView() 中添加以下代码。

public static boolean checked=false;

   holder.your_checkBox.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                CheckBox cb = (CheckBox) v;

                if(cb.isChecked())
                {
                    checked=true;
                    String  selected_txt = object_of_ArrayList.get(position).get(ArrayList.Value);

                // For Example//

                 String name=friendList.get(position).get(FriendList.FRIEND_NAME);
                }

            }
        });

如果你想在另一个活动中使用这个项目文本，那么你想让字符串像这样静态

   public static String name;

如果您想在另一个活动中访问此名称

  String str_name=your_adapterName.string;

Answer 2

You have to save the checkbox state it is checked or not maintained in boolean array .

//define your custom adapter
private class CustomAdapter extends ArrayAdapter<HashMap<String, Object>>
{
   // boolean array for storing
   //the state of each CheckBox 
   boolean[] checkBoxState;


   ViewHolder viewHolder;

   public CustomAdapter(Context context, int textViewResourceId,
   ArrayList<HashMap<String, Object>> players) {

    //let android do the initializing :)
    super(context, textViewResourceId, players); 

  //create the boolean array with
   //initial state as false
  checkBoxState=new boolean[players.size()];
  }


    //class for caching the views in a row  
 private class ViewHolder
 {
   ImageView photo;
   TextView name,team;
   CheckBox checkBox;
 }



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

   if(convertView==null)
    {
   convertView=inflater.inflate(R.layout.players_layout, null);
   viewHolder=new ViewHolder();

    //cache the views
    viewHolder.photo=(ImageView) convertView.findViewById(R.id.photo);
    viewHolder.name=(TextView) convertView.findViewById(R.id.name);
    viewHolder.team=(TextView) convertView.findViewById(R.id.team);
    viewHolder.checkBox=(CheckBox) convertView.findViewById(R.id.checkBox);

     //link the cached views to the convertview
    convertView.setTag( viewHolder);


  }
  else
   viewHolder=(ViewHolder) convertView.getTag();


  int photoId=(Integer) players.get(position).get("photo");



   //VITAL PART!!! Set the state of the 
   //CheckBox using the boolean array
        viewHolder.checkBox.setChecked(checkBoxState[position]);


           //for managing the state of the boolean
           //array according to the state of the
           //CheckBox

           viewHolder.checkBox.setOnClickListener(new View.OnClickListener() {

   public void onClick(View v) {
    if(((CheckBox)v).isChecked())
     checkBoxState[position]=true;
     //set the data to be displayed
  viewHolder.photo.setImageDrawable(getResources().getDrawable(photoId));
  viewHolder.name.setText(players.get(position).get("name").toString());
  viewHolder.team.setText(players.get(position).get("team").toString());

    else
     checkBoxState[position]=false;

    }
   });

   //return the view to be displayed
   return convertView;
  }

 }

the state of the CheckBox is set to its correct state using the boolean array.
When the user clicks on a CheckBox,the resulting state of that CheckBox is cached in the boolean array.This cached state is the one that is used to set the CheckBox to its correct state

    public class CustomListViewWithCheckBox extends ListActivity {


  //ArrayList that will hold the original Data
  ArrayList<HashMap<String, Object>> players;
  LayoutInflater inflater;

  @Override
  public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);



 //get the LayoutInflater for inflating the customomView
 //this will be used in the custom adapter
 inflater=(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

 //these arrays are just the data that 
 //I'll be using to populate the ArrayList
 //You can use our own methods to get the data
 String names[]={"Sachin","Ricky","Lara","Dravid",
    "Dale Steyn"}; 

 String teams[]={"India","Aus","West indies",
    "India","South Africa"};
 Integer[] photos={R.drawable.sachin,R.drawable.ricky,
    R.drawable.lara,R.drawable.dravid,
    R.drawable.dale_steyn};

 players=new ArrayList<HashMap<String,Object>>();

 //temporary HashMap for populating the 
 //Items in the ListView
 HashMap<String , Object> temp;

 //total number of rows in the ListView
 int noOfPlayers=names.length;

 //now populate the ArrayList players
 for(int i=0;i<noOfPlayers;i++)
 {
  temp=new HashMap<String, Object>();

  temp.put("name", names[i]);
  temp.put("team", teams[i]);    
  temp.put("photo", photos[i]);

  //add the row to the ArrayList
  players.add(temp);        
 }

 /*create the adapter
 *first param-the context
 *second param-the id of the layout file 
  you will be using to fill a row
 *third param-the set of values that
   will populate the ListView */
 final CustomAdapter adapter=new CustomAdapter(this, R.layout.players_layout,players); 

 //finally,set the adapter to the default ListView
 setListAdapter(adapter);


 }

Answer 3

你可以这样使用

import android.app.Activity;

import android.os.Bundle;

import android.util.SparseBooleanArray;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.ListView;

import android.widget.Toast;



public class AndroidListViewActivity extends Activity {



    ListView myList;

    Button getChoice;



    String[] listContent = {

            "January",

            "February",

            "March",

            "April",

            "May",

            "June",

            "July",

            "August",

            "September",

            "October",

            "November",

            "December"

    };



    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        myList = (ListView)findViewById(R.id.list);

        getChoice = (Button)findViewById(R.id.getchoice);



        ArrayAdapter<String> adapter

        = new ArrayAdapter<String>(this,

                android.R.layout.simple_list_item_multiple_choice,

             listContent);



        myList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

        myList.setAdapter(adapter);



        getChoice.setOnClickListener(new Button.OnClickListener(){



            @Override

            public void onClick(View v) {

                // TODO Auto-generated method stub



                String selected = "";



                int cntChoice = myList.getCount();

                SparseBooleanArray sparseBooleanArray = myList.getCheckedItemPositions();

                for(int i = 0; i < cntChoice; i++){

                    if(sparseBooleanArray.get(i)) {

                        selected += myList.getItemAtPosition(i).toString() + "\n";



                    }

                }



                Toast.makeText(AndroidListViewActivity.this,

                        selected,

                        Toast.LENGTH_LONG).show();

            }});



    }

}