如何实现自定义列表的多个item，的单选或多选 怎么实现CheckBoxList单选功能
\u5982\u4f55\u901a\u8fc7ListView\u5b9e\u73b0\u591a\u9009\u6548\u679c\u4e00.\u65e0\u56fe\u65e0\u771f\u76f8 \u4e8c.\u5173\u952e\u4ee3\u7801 1.\u4e3b\u5e03\u5c40 sample_main.xml\uff08\u5355\u9009\u548c\u591a\u9009\u5207\u6362\uff0c\u8bbe\u7f6eandroid:choiceMode\uff0c\u5176\u4ed6\u4e0d\u53d8\uff09
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2.item\u5e03\u5c40
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3.\u81ea\u5b9a\u4e49\u5355\u9009\u548c\u591a\u9009\u5e03\u5c40
package com.example.android.customchoicelist;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import android.view.View;import android.widget.Checkable;import android.widget.LinearLayout;/***\u81ea\u5b9a\u4e49\u5355\u9009\u548c\u591a\u9009\u5e03\u5c40*/public class CheckableLinearLayout extends LinearLayout implements Checkable {private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked}; private boolean mChecked = false; public CheckableLinearLayout(Context context, AttributeSet attrs) { super(context, attrs);} //\u8fd4\u56de\u9009\u4e2d\u7684\u72b6\u6001public boolean isChecked() { return mChecked;} //\u8bbe\u7f6e\u9009\u4e2d\u7684\u72b6\u6001public void setChecked(boolean b) { if (b != mChecked) {mChecked = b;refreshDrawableState();}} //\u9009\u62e9\u5f00\u5173public void toggle() {setChecked(!mChecked);} //\u6dfb\u52a0\u9009\u4e2d\u7684\u6761\u76ee\u72b6\u6001@Overridepublic int[] onCreateDrawableState(int extraSpace) { final int[] drawableState = super.onCreateDrawableState(extraSpace + 1); if (isChecked()) {mergeDrawableStates(drawableState, CHECKED_STATE_SET);} return drawableState;}}123456789101112131415161718192021222324252627282930313233343536373839404142434445
4.\u4e3b\u8981\u4ee3\u7801MainActivity.java
package com.example.android.customchoicelist;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;/***\u5982\u4f55\u521b\u5efa\u81ea\u5b9a\u4e49\u7684\u5355\u6216\u591a\u9009\u62e9* @author \u5b64\u72fc* @since 2015-8-3*/public class MainActivity extends Activity {ListView listView; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);setContentView(R.layout.sample_main);listView =(ListView)findViewById(R.id.listview);listView.setAdapter(new MyAdapter());listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Overridepublic void onItemClick(AdapterView parent, View view, int position, long id) { //\u83b7\u53d6\u6761\u76eeCheckableLinearLayout linearLayout = (CheckableLinearLayout) view.findViewById(R.id.ll_contain); if (linearLayout.isChecked()) {Log.e("\u9009\u4e2dtrue", position + "");} else {Log.e("\u672a\u9009\u4e2dfalse", position + "");} /**\u5bf9\u4e8e\u591a\u9009\uff0c\u5efa\u8bae\u521b\u5efa\u96c6\u5408\uff0c\u7528\u4e8e\u5c01\u88c5\u7528\u6237\u9009\u4e2d\u7684\u6761\u76eeposition\uff0c\u5b58\u5165\u65f6\u5224\u5b9a \u7528\u6237\u6765\u56de\u5207\u6362\u7684\u72b6\u6001*/}});} /*** A simple array adapter that creates a list of cheeses.*/private class MyAdapter extends BaseAdapter {@Overridepublic int getCount() { return Cheeses.CHEESES.length;} @Overridepublic String getItem(int position) { return Cheeses.CHEESES[position];} @Overridepublic long getItemId(int position) { return Cheeses.CHEESES[position].hashCode();} @Overridepublic View getView(int position, View convertView, ViewGroup container) { if (convertView == null) {convertView = getLayoutInflater().inflate(R.layout.list_item, container, false);}((TextView) convertView.findViewById(android.R.id.text1)).setText(getItem(position)); return convertView;}}}123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172
\u4e09.\u8bf4\u660e \u901a\u7bc7\u6ca1\u6709\u591a\u4f59\u7684\u5e9f\u8bdd\uff0c\u4e0d\u6d6a\u8d39\u5927\u5bb6\u7684\u5b9d\u8d35\u65f6\u95f4\uff0c\u4ee3\u7801\u7b80\u6d01\uff0c\u4e3b\u8981\u90e8\u5206\u90fd\u6709\u6ce8\u91ca\uff0c\u5b9e\u9645\u5f00\u53d1\u4e2d\u7684\u9700\u6c42\uff0c\u9700\u8981\u725b\u725b\u4eec\u81ea\u5df1\u81ea\u5b9a\u4e49\uff0c\u53d1\u6325\uff0c\u5982\u6709\u7591\u95ee\uff0c\u8bf7\u7559\u8a00\u2014-\u5b64\u72fc
\u56db.\u793a\u4f8b\u6e90\u7801\uff08\u7531\u4e8e\u5b64\u72fc\u4f7f\u7528\u7684\u662fAndroid studio\u5f00\u53d1\uff0c\u6682\u65f6\u6ca1\u6709eclipse\u7248\uff09
\u65b9\u6cd51\uff1a
1function CheckSelect()
2 {
3 var tb = document.getElementByIdx_x("ctl00_ContentPlaceHolder1_chkYear");
4
5 for(var i=0;i < tb.rows.length;i++)
6 {
7 var chk = tb.rows[i].firstChild.firstChild;
8 alert(chk == event.srcElement);
9 if(chk != event.srcElement)
10 { chk.checked = false;}
11 }
12 }
\u6b64\u65b9\u6cd5\u9002\u7528\u5728\u7ad6\u5411\u6392\u5217\u60c5\u51b5\u4e0b\u3002
单选方法:(该方法同样适用于radiobutton)
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http：//schemas。android。com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<ImageView
android:id="@+id/img"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/triangle16blue"/>
<ListView
android:id="@+id/lvGroup"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/downbutton_corner"/>
</LinearLayout><LinearLayout 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/item_tv"
android:textSize="18sp"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical" />
<CheckBox
android:id="@+id/item_cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:clickable="false"
android:focusableInTouchMode="false"
android:gravity="center_vertical"/>
</LinearLayout>MainActivity.java
public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private ListView listView;
private ArrayList<String> groups;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) this.findViewById(R.id.list);
groups = new ArrayList<String>();
groups.add("11");
groups.add("22");
groups.add("33");
groups.add("44");
groups.add("55");
groups.add("66");
groups.add("77");
GroupAdapter adapter = new GroupAdapter(this,groups);
listView.setAdapter(adapter);
listView.setOnItemClickListener(listItemClickListener);
OnItemClickListener listItemClickListener=new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
//// 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤
ViewHolder viewHolder=(ViewHolder)view.getTag();
viewHolder.cb.toggle();// 把CheckBox的选中状态改为当前状态的反,gridview确保是单一选中
}
};
}
}
}
GroupAdapter.java
public class GroupAdapter extends BaseAdapter {
private Activity activity;//上下文
private ArrayList<String> list;
private LayoutInflater inflater=null;//导入布局
private int temp=-1;
public GroupAdapter(Activity context, ArrayList<String> list) {
this.activity = context;
this.list = list;
inflater=LayoutInflater.from(context);
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
//listview每显示一行数据,该函数就执行一次
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder=null;
if (convertView==null) {//当第一次加载ListView控件时 convertView为空
convertView=inflater.inflate(R.layout.group_item_view, null);//所以当ListView控件没有滑动时都会执行这条语句
holder=new ViewHolder();
holder.tv=(TextView)convertView.findViewById(R.id.item_tv);
holder.cb=(CheckBox)convertView.findViewById(R.id.item_cb);
convertView.setTag(holder);//为view设置标签
}
else{//取出holder
holder=(ViewHolder) convertView.getTag();//the Object stored in this view as a tag
}
//设置list的textview显示
holder.tv.setTextColor(Color.WHITE);
holder.tv.setText(list.get(position));
// 根据isSelected来设置checkbox的选中状况
holder.cb.setId(position);//对checkbox的id进行重新设置为当前的position
holder.cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {
//把上次被选中的checkbox设为false
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked){//实现checkbox的单选功能,同样适用于radiobutton
if(temp!=-1){
//找到上次点击的checkbox,并把它设置为false,对重新选择时可以将以前的关掉
CheckBox tempCheckBox=(CheckBox)activity.findViewById(temp);
if(tempCheckBox!=null)
tempCheckBox.setChecked(false);
}
temp=buttonView.getId();//保存当前选中的checkbox的id值
}
}
});
//System.out.println("temp:"+temp);
//System.out.println("position:"+position);
if(position==temp)//比对position和当前的temp是否一致
holder.cb.setChecked(true);
else
holder.cb.setChecked(false);
return convertView;
}
static class ViewHolder {
TextView tv;
CheckBox cb;
}
}
listview checkbox实现多选框
MainAcitvity.java
public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private ListView listView;
private ArrayList<String> groups;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) this.findViewById(R.id.list);
groups = new ArrayList<String>();
groups.add("11");
groups.add("22");
groups.add("33");
groups.add("44");
groups.add("55");
groups.add("66");
groups.add("77");
GroupAdapter adapter = new GroupAdapter(this,groups);
listView.setAdapter(adapter);
listView.setOnItemClickListener(listItemClickListener);
OnItemClickListener listItemClickListener=new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
//// 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤
ViewHolder viewHolder=(ViewHolder)view.getTag();
viewHolder.cb.toggle();// 把CheckBox的选中状态改为当前状态的反,gridview确保是单一选中
GroupAdapter.getIsSelected().put(position, viewHolder.cb.isChecked());//将CheckBox的选中状况记录下来
}
};
}
}
GroupAdapter.java
public class GroupAdapter extends BaseAdapter {
private Context context;//上下文
private ArrayList<String> list;
//控制CheckBox选中情况
private static HashMap<Integer,Boolean> isSelected;
private LayoutInflater inflater=null;//导入布局
public GroupAdapter(Context context, ArrayList<String> list) {
this.context = context;
this.list = list;
inflater=LayoutInflater.from(context);
isSelected=new HashMap<Integer, Boolean>();
initData();
}
private void initData(){//初始化isSelected的数据
for(int i=0;i<list.size();i++){
getIsSelected().put(i,false);
}
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
//listview每显示一行数据,该函数就执行一次
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder=null;
if (convertView==null) {//当第一次加载ListView控件时 convertView为空
convertView=inflater.inflate(R.layout.group_item_view, null);//所以当ListView控件没有滑动时都会执行这条语句
holder=new ViewHolder();
holder.tv=(TextView)convertView.findViewById(R.id.item_tv);
holder.cb=(CheckBox)convertView.findViewById(R.id.item_cb);
convertView.setTag(holder);//为view设置标签
}
else{//取出holder
holder=(ViewHolder) convertView.getTag();//the Object stored in this view as a tag
}
//设置list的textview显示
holder.tv.setTextColor(Color.WHITE);
holder.tv.setText(list.get(position));
// 根据isSelected来设置checkbox的选中状况
holder.cb.setChecked(getIsSelected().get(position));
return convertView;
}
static class ViewHolder {
TextView tv;
CheckBox cb;
}
public static HashMap<Integer, Boolean>getIsSelected(){
return isSelected;
}
public static void setIsSelected(HashMap<Integer, Boolean> isSelected){
GroupAdapter.isSelected=isSelected;
}
}其中,getview负责显示每一行listview item,每显示一行就执行一次getview,
若要单选,必须保存当前选中的checkbox的position值,与listview 的每一个item的position进行比较,相同时才设置checkbox ischeck=true;
只有checkbox的setOnCheckChangeListener可以做到这点,保存上一次点击的position值,对checkbox的id值重新设置.temp保存该id值.
getview负责显示数据,onitemselectedlistener负责发送消息,提取数据,处理数据
CheckBox本为复选框,仍然可以当单选框用
自定义ListView item中包含一个textview 和checkbox,checkbox选中级别高于item,故在xml中进行屏蔽
单选方法:(该方法同样适用于radiobutton)
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<ImageView
android:id="@+id/img"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/triangle16blue"/>
<ListView
android:id="@+id/lvGroup"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/downbutton_corner"/>
</LinearLayout>
<LinearLayout xmlns:android=
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/item_tv"
android:textSize="18sp"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center_vertical" />
<CheckBox
android:id="@+id/item_cb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
android:clickable="false"
android:focusableInTouchMode="false"
android:gravity="center_vertical"/>
</LinearLayout>
MainActivity.java
public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private ListView listView;
private ArrayList<String> groups;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) this.findViewById(R.id.list);
groups = new ArrayList<String>();
groups.add("11");
groups.add("22");
groups.add("33");
groups.add("44");
groups.add("55");
groups.add("66");
groups.add("77");
GroupAdapter adapter = new GroupAdapter(this,groups);
listView.setAdapter(adapter);
listView.setOnItemClickListener(listItemClickListener);
OnItemClickListener listItemClickListener=new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
//// 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤
ViewHolder viewHolder=(ViewHolder)view.getTag();
viewHolder.cb.toggle();// 把CheckBox的选中状态改为当前状态的反,gridview确保是单一选中
}
};
}
}
}
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