自定义Listview与CheckBox单选 [英] Custom Listview with CheckBox single selection

问题描述

这里我使用checkbox / RadioButton创建自定义列表视图。

我尝试使用这个 lstvw.setChoiceMode（ListView.CHOICE_MODE_SINGLE）;

$ c>但它不适用于我。有任何其他解决方案，然后请让我知道。

main.java

  private ImageAdapter适配器; 
 
 private static String month [] = {January，February，March，April，May，
June，July，August ，September，
October，November，December}; 
 
 
 / **当第一次创建活动时调用。 * / 
 @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）; 
} 
  

我不知道如何添加复选框的代码到适配器class.please检查适配器类如下。

ImageAdapter.class

  public class ImageAdapter extends BaseAdapter {
 
 public String title []; 
 public String description []; 
 public Activity context; 
 public LayoutInflater充气器; 
 
 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自动生成的方法存根
 return title.length; 
} 
 
 @Override 
 public Object getItem（int position）{
 // TODO自动生成的方法存根
 return null; 
} 
 
 @Override 
 public long getItemId（int position）{
 // TODO自动生成的方法存根
 return 0; 
} 
 
 public static class ViewHolder 
 {
 
 TextView txtViewTitle; 
 
} 
 
 @Override 
 public View getView（int position，View convertView，ViewGroup parent）{
 // TODO自动生成方法存根
 
 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; 
} 
 
} 
  

strong>

Listitem.xml

 <？xml version = 1.0encoding =utf-8？> 
< RelativeLayout xmlns：android =http://schemas.android.com/apk/res/android
 android：layout_width =fill_parent
 android：layout_height =fill_parent 
 android：orientation =horizo​​ntal> 
 
< 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
 ：layout_height =wrap_content
 android：layout_alignParentRight =true
 android：gravity =right/> 
  

解决方案>

Home.java（Activity）这是我每次只需要选择单个项目的方法。

  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 i = 0; i  {
 lvCheckBox.setItemChecked（i，false）; 
} 
} $ b b}）; 
} 
} 
  

和我的（main.xml）XML

;
< 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 =horizo​​ntal
android：gravity =center 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>

因此输出将是这样的。

>

：此处

如果您对此有任何麻烦，请告诉我们。

修改：查看此实用链接：自定义单一选项ListView < a>

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

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);
}

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

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;  
}   

}

EDIT:

Listitem.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" />

解决方案

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

Home.java (Activity)

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);                
                }
            }
        });
    }
}

and my (main.xml) XML file should like this

<?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>

so the output will be like this way..

Source: here

let me know if you have any trouble regarding this.

Edit: check this useful link: Custom Single choice ListView

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