Question

我在ListItems中选择CheckBoxes时遇到问题。每个ListItem都有一个CheckBox，当单击ListItem时，应激活CheckBox。问题是CheckBox随机激活。例如：当我有2个ListItem并单击ListItem1时，它的CheckBox被激活。当我再次点击时，ListItem2的CheckBox也被激活。当我再次单击时，ListItem1的CheckBox被取消激活。当我再次点击时，ListItem2的CheckBox被停用。当我再次点击它时，它从头开始。我理解ListView重用了Items，我必须使用getView（）方法，但我无法使它工作。我必须提到我是一个血腥的初学者，所以请原谅我，如果一些代码根本没有意义。

Answer 1

尝试使用 setOnItemSelectedListener 而不是 setOnItemClickListener 。我相信点击事件会更频繁地被调用。

Answer 2

您需要将项目状态存储在您的适配器中，不是在View本身中，因为它可能是一个重用的，就像您说的那样。您拨打super.getView()的电话会为您填写正确的文字，但不会更改复选框状态。保持一个bool数组反映每个复选框的状态，并在getView（）中应用状态，然后返回视图：

CheckBox cb = (CheckBox) view.findViewById(R.id.cb);
cb.setChecked(cbStates[position]);

Answer 3

您需要创建自定义阵列适配器和所有设置。

这是我为ListView for ChekBoxList创建的Activity类

<强> ActivityGamesList.java

package com.rdc.gameListApp;

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.Toast;

public class ActivityGamesList extends Activity {

     private ListView listGames = null; 
     private DBAdapter database = null;
     private Context context = null;    

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list_of_games);

        final CheckBox favBox = (CheckBox) findViewById(R.id.favbuttonInList);
        listGames = (ListView) findViewById(R.id.listViewGame); 

        context = getApplicationContext();
        database = new DBAdapter(context);

        //here I am getting the data from database and  putting in to List
        List<String> gamelistArrayR = database.selectAllName();     

        // custom adapter for adding fav box
        //make sure here "gamelistArrayR" is List and type is String
        listGames.setAdapter(new CustomAdapter(this, gamelistArrayR));

        //listener for list view
        listGames.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {

                Toast.makeText(getApplicationContext(), "You have selected:  " +
                          position+" no row", Toast.LENGTH_SHORT).show();

            }
        });
    }

}

及以下是自定义阵列适配器

<强> CustomAdapter.java

package com.rdc.gameListApp;

import java.util.List;

import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.TextView;
import android.widget.Toast;

public class CustomAdapter extends ArrayAdapter<String> {
    private final Context context;
    private final List<String> values;

    public CustomAdapter(Context context, List<String> gamelistArrayR) {
        super(context, R.layout.list_row_custom, gamelistArrayR);
        this.context = context;
        this.values = gamelistArrayR;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View rowView = inflater.inflate(R.layout.list_row_custom, parent, false);

        //Game Name Text in list
        TextView textView = (TextView) rowView.findViewById(R.id.txtGameNameInList);
        // Check Box in list
        CheckBox favBox = (CheckBox) rowView.findViewById(R.id.favbuttonInList);

        textView.setText(values.get(position));         

        //listener for check box
        favBox
        .setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {
                Boolean flag = isChecked;               
                if(flag){                   

                        Log.v("Debug", "step no 1");
                        Toast.makeText(context, "Marked as Favorite Game!", 1).show();                  
                }
            }
        }); 
        return rowView;
    }
}

我得到了这样的输出..

enter image description here

修改

当您滚动列表时，chekboxrs将被取消选中，因为或重新创建视图。

所以你需要存储复选框的状态，你应该检查下面的链接

this所以线程或 this教程

ListView CheckBoxes无法正常工作

3 个答案: