带有复选框单选的自定义列表视图 [英] Custom Listview with CheckBox single selection

问题描述

这里我使用复选框/单选按钮创建自定义列表视图.我得到了这个，但我需要一个单一的选择.

Here I am creating custom listview with checkbox / RadioButton. I got this but I need the single selection for that.

我尝试使用这个 lstvw.setChoiceMode(ListView.CHOICE_MODE_SINGLE); 但它对我不起作用.有没有其他解决方案，然后请告诉我.

I try using this lstvw.setChoiceMode(ListView.CHOICE_MODE_SINGLE); but it not works for me. Is there any other solutions for that then please let me know.

main.java

  private ImageAdapter  adapter; 

private static String month[] = {"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);

    ListView lstvw = (ListView) findViewById(R.id.listView);

     adapter = new ImageAdapter(this, month);  
     lstvw.setAdapter(adapter);  
      lstvw.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

     lstvw.setOnItemClickListener(this);
}

我不知道如何将复选框的代码添加到适配器类中.请检查适配器类，如下所示.

I have no idea for the how to add code for the checkbox into the adapter class.please check the adapter class as below.

ImageAdapter.class

ImageAdapter.class

public class ImageAdapter extends BaseAdapter{

public String title[];  
public String description[];  
public Activity context;  
public LayoutInflater inflater;

public ImageAdapter(Activity context,String[] title) {  
    super();  

    this.context = context;  
    this.title = title;  

    this.inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  
}  

@Override  
public int getCount() {  
    // TODO Auto-generated method stub  
    return title.length;  
}  

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

@Override  
public long getItemId(int position) {  
    // TODO Auto-generated method stub  
    return 0;  
}  

public static class ViewHolder  
{  

    TextView txtViewTitle;  

}  

@Override  
public View getView(int position, View convertView, ViewGroup parent) {  
    // TODO Auto-generated method stub  

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

        holder.txtViewTitle = (TextView) convertView.findViewById(R.id.lstvw_textView);  
        convertView.setTag(holder);  
    }  
    else  
        holder=(ViewHolder)convertView.getTag();  

    holder.txtViewTitle.setText(title[position]);  

    return convertView;  
}   

}

列表项.xml

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >

<TextView
    android:id="@+id/lstvw_textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_toLeftOf="@+id/itemCheckBox"
    android:padding="8dp"
    android:text="hello world" />



<CheckBox
    android:id="@+id/itemCheckBox"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:gravity="right" />

推荐答案

如果我需要一次只选择一个项目，我会怎么做.

Here is what i would do if i need to select only single item at a time.

Home.java(活动)

package com.lvcheck.activities;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

public class Home extends Activity 
{
    private ListView lvCheckBox;
    private Button btnCheckAll, btnClearALl;
    private String[] arr = {"One", "Two", "Three", "Four", "Five", "Six"};

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

        btnCheckAll = (Button)findViewById(R.id.btnCheckAll);
        btnClearALl = (Button)findViewById(R.id.btnClearAll);

        lvCheckBox = (ListView)findViewById(R.id.lvCheckBox);
        lvCheckBox.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        lvCheckBox.setAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_multiple_choice, arr));


        btnCheckAll.setOnClickListener(new OnClickListener() 
        {           
            @Override
            public void onClick(View arg0) 
            {
                for(int i=0 ; i < lvCheckBox.getAdapter().getCount(); i++)
                {
                    lvCheckBox.setItemChecked(i, true);             
                }
            }
        });

        btnClearALl.setOnClickListener(new OnClickListener() 
        {           
            @Override
            public void onClick(View v) 
            {
                for(int i=0 ; i < lvCheckBox.getAdapter().getCount(); i++)
                {
                    lvCheckBox.setItemChecked(i, false);                
                }
            }
        });
    }
}

和我的 (main.xml) XML 文件应该是这样的

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <LinearLayout
        android:layout_width="fill_parent"
        android:orientation="horizontal"
        android:gravity="center"
        android:layout_height="wrap_content">

        <Button
            android:layout_width="wrap_content"
            android:text="Check All"
            android:layout_marginRight="7dip"
            android:id="@+id/btnCheckAll"
            android:layout_height="wrap_content">
        </Button>
        <Button
            android:layout_width="wrap_content"
            android:text="Clear All"
            android:id="@+id/btnClearAll"
            android:layout_height="wrap_content">
        </Button>
    </LinearLayout>

    <ListView
        android:layout_width="fill_parent"
        android:id="@+id/lvCheckBox"
        android:fadingEdge="none"
        android:cacheColorHint="@null"
        android:layout_height="fill_parent">
    </ListView>
</LinearLayout>

所以输出会像这样..

来源:这里

如果您对此有任何疑问，请告诉我.

let me know if you have any trouble regarding this.

检查这个有用的链接:自定义单选列表视图

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