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自定义ListView item中包含一个e69da5e6ba903231313335323631343130323136353331333337376333textview 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
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
android:id="@+id/img"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/triangle16blue"/>
android:id="@+id/lvGroup"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/downbutton_corner"/>
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
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" />
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"/>
MainActivity.javapublic class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private ListView listView;
private ArrayList groups;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) this.findViewById(R.id.list);
groups = new ArrayList();
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 list;
private LayoutInflater inflater=null;//导入布局
private int temp=-1;
public GroupAdapter(Activity context, ArrayList 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 groups;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
listView = (ListView) this.findViewById(R.id.list);
groups = new ArrayList();
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 list;
//控制CheckBox选中情况
private static HashMap isSelected;
private LayoutInflater inflater=null;//导入布局
public GroupAdapter(Context context, ArrayList list) {
this.context = context;
this.list = list;
inflater=LayoutInflater.from(context);
isSelected=new HashMap();
initData();
}
private void initData(){//初始化isSelected的数据
for(int i=0;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 HashMapgetIsSelected(){
return isSelected;
}
public static void setIsSelected(HashMap 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
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