我正在使用片段，其中我有ListView和全选复选框。
Fragment class ..
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
fb_custom_listview = (ListView) selectfriend_login
.findViewById(R.id.friend_listview);
select_all=(CheckBox) selectfriend_login.findViewById(R.id.select_all_checkbox);
select_all.setOnCheckedChangeListener(this);
}
现在拥有custom adapter class extends Baseadapter
我在ImageView中有一个TextView，一个checkbox和一个layout，并在baseadapter类的getview方法中给布局充气。显示图片，这一切都没问题，显示文本并显示复选框。现在，当我单击select_all(fragment class)复选框时，应检查自定义适配器类的所有复选框，并取消选中所有未选中的复选框。这是类
用于自定义适配器
public class CustomListAdapter extends BaseAdapter
{
private Context contxt;
private ArrayList<String> user_friend_name;
private ArrayList<String> user_friend_pic_url;
private LayoutInflater inflater;
private int friend_counter=0;
private ChangeUIListner mlistner;
public static ArrayList<Integer> selected_friend_pos;
public static ArrayList<String> selected_friend_uid;
public static ArrayList<String> selected_friend_name;
private List<Model> list;
private ViewHolder viewholder=null;
public CustomListAdapter(Context context,ArrayList<String> user_friend_picurl, List<Model> model) {
// TODO Auto-generated constructor stub
this.contxt=context;
this.list=model;
user_friend_pic_url=user_friend_picurl;
selected_friend_uid=new ArrayList<String>();
selected_friend_name=new ArrayList<String>();
selected_friend_pos=new ArrayList<Integer>();
user_friend_name=GetFriendDetails.user_fb_friend_name;
inflater=(LayoutInflater) contxt.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
System.gc();
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return user_friend_pic_url.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView( int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if(convertView==null)
{
viewholder=new ViewHolder();
convertView=inflater.inflate(R.layout.custom_listview_friendlist, null);
viewholder.fb_friend_name=(TextView) convertView.findViewById(R.id.friend_nametextview);
viewholder.fb_friend_pic=(ImageView) convertView.findViewById(R.id.friend_picview);
viewholder.fb_checkbox=(CheckBox) convertView.findViewById(R.id.friendselectcheckBox);
viewholder.fb_checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
int getposition=(Integer) buttonView.getTag();
Log.e("ITEM POSITION", "."+getposition);
list.get(getposition).setSelected(buttonView.isChecked());
if(isChecked==true)
{
if(selected_friend_pos.contains(getposition))
{
//nothing
}
else
{
friend_counter++;
mlistner.UpdateUi(friend_counter);
selected_friend_pos.add(getposition);
selected_friend_uid.add(GetFriendDetails.user_fb_friend_id.get(getposition));
selected_friend_name.add(GetFriendDetails.user_fb_friend_name.get(getposition));
Log.e("ARRAY SIZE", "."+selected_friend_uid.size());
}
}
else
{
if(selected_friend_pos.contains(getposition)){
friend_counter--;
mlistner.UpdateUi(friend_counter);
int del_posi=selected_friend_pos.indexOf(getposition);
selected_friend_pos.remove(del_posi);
selected_friend_name.remove(del_posi);
selected_friend_uid.remove(del_posi);
Log.e("ARRAYLIST", "REM"+del_posi);
Log.e("ARRAY SIZE", "."+selected_friend_uid.size());
}
}
}
});
convertView.setTag(viewholder);
}
else
{
viewholder=(ViewHolder) convertView.getTag();
new AsyncDownloadImage(viewholder).execute(user_friend_pic_url.get(position));
}
viewholder.fb_checkbox.setTag(position);
viewholder.fb_checkbox.setChecked(list.get(position).isSelected());
viewholder.fb_friend_name.setText(user_friend_name.get(position));
viewholder.fb_friend_name.setTag(user_friend_name.get(position));
viewholder.fb_friend_pic.setTag(user_friend_pic_url.get(position));
//new AsyncDownloadImage(viewholder).execute(user_friend_pic_url.get(position));
return convertView;
}
class ViewHolder
{
int id;
ImageView fb_friend_pic;
TextView fb_friend_name;
CheckBox fb_checkbox;
}
public class AsyncDownloadImage extends AsyncTask<String, Object, Bitmap>
{
private HttpURLConnection connection;
private InputStream is;
private Bitmap bitmap;
private URL url;
ViewHolder holder;
public AsyncDownloadImage(ViewHolder viewholder1) {
// TODO Auto-generated constructor stub
holder=viewholder1;
}
@Override
protected Bitmap doInBackground(String... params) {
// TODO Auto-generated method stub
try {
url=new URL(params[0]);
try {
connection=(HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
is=connection.getInputStream();
bitmap=BitmapFactory.decodeStream(is);
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally
{
if(is!=null)
{
try {
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}if(connection!=null)
{
connection.disconnect();
}
}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return bitmap;
}
@Override
protected void onPostExecute(Bitmap result) {
// TODO Auto-generated method stub
if(result!=null)
{
holder.fb_friend_pic.setImageBitmap(result);
}
}
}
public void registerUIupdateListener(ChangeUIListner lisnter)
{
mlistner=lisnter;
}
}
你可以看到我已经使用了listview复选框的单选项，所以它的工作正常并添加到arraylist中以便进一步操作。所以我们如何在单击或选择复选框时实现select all。谢谢
答案 0 :(得分：1)
当你点击selectAll check按钮然后调用selectAllFromList（value）函数。 喜欢
selectAllButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//is chkIos checked?
if (((CheckBox) v).isChecked())
{
selectAllFromList(true);
}else
{
selectAllFromList(false);
}
}
以下功能将从列表中选中所有复选框：
private void selectAllFromList(boolean b) {
int cList = list.getCount();
for(int i=0;i<cList;i++){
View sView = yourMainList.getChildAt(i);
if(sView != null){
CheckBox childCheckBox=(CheckBox)sView.findViewById(R.id.urCheckButton);
childCheckBox.setChecked(b);
childCheckBox.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (((CheckBox) v).isChecked())
{
selectAllButton.setChecked(false);
}
}
});
}
}
}
});
希望这个可以帮助你