Android OnCheckedChangedListener,查看在片段内部的listview中加载的复选框
我试图为listview中加载的所有复选框声明一个更改侦听器,其中listview也由一个片段加载,下面是我的代码: 片段:Android OnCheckedChangedListener,查看在片段内部的listview中加载的复选框,android,listview,android-fragments,oncheckedchanged,Android,Listview,Android Fragments,Oncheckedchanged,我试图为listview中加载的所有复选框声明一个更改侦听器,其中listview也由一个片段加载,下面是我的代码: 片段: public class AddGroupMembersFragment extends Fragment{ ArrayList<HashMap<Integer, Member>> groupMembersList; ListView lv; CheckBox checkBox; @Override pu
public class AddGroupMembersFragment extends Fragment{
ArrayList<HashMap<Integer, Member>> groupMembersList;
ListView lv;
CheckBox checkBox;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_add_group_members, container, false);
groupMembersList = new ArrayList<>();
lv = (ListView) rootView.findViewById(R.id.group_members_list);
new AddGroupMembersFragment.PostDataAsyncTask().execute();
// Inflate the layout for this fragment
return rootView;
}
AdapterView.OnItemClickListener checkBoxChanged = new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
// AdapterView is the parent class of ListView
ListView lv = (ListView) arg0;
if(lv.isItemChecked(position)){
if(selectAllSubmit.getVisibility()==View.INVISIBLE){
selectAllSubmit.setVisibility(View.VISIBLE);
}
}
}
};
public class PostDataAsyncTask extends AsyncTask<String, String, String> {
...
@Override
protected void onPostExecute(String lenghtOfFile) {
lv.setAdapter(new GroupMembersListAdapter(getActivity(),groupMembersList,1));
lv.setOnItemClickListener(checkBoxChanged);
}
}
public类AddGroupMembersFragment扩展片段{
ArrayList组成员列表;
ListView lv;
复选框;
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
视图根视图=充气器。充气(R.layout.fragment\u添加组成员,容器,false);
groupMembersList=新的ArrayList();
lv=(ListView)rootView.findViewById(R.id.group\u members\u list);
新建AddGroupMembersFragment.PostDataAsyncTask().execute();
//为该碎片膨胀布局
返回rootView;
}
AdapterView.OnItemClickListener checkBoxChanged=new AdapterView.OnItemClickListener(){
@凌驾
public void onItemClick(AdapterView arg0、视图arg1、整型位置、长id){
//AdapterView是ListView的父类
ListView lv=(ListView)arg0;
如果(低压isItemChecked(位置)){
如果(选择AllSubmit.getVisibility()==View.INVISIBLE){
选择AllSubmit.setVisibility(View.VISIBLE);
}
}
}
};
公共类PostDataAsyncTask扩展了AsyncTask{
...
@凌驾
受保护的void onPostExecute(字符串长度ffile){
setAdapter(新的GroupMembersListAdapter(getActivity(),groupMembersList,1));
lv.setOnItemClickListener(复选框已更改);
}
}
listview item.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<CheckBox
android:id="@+id/checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:focusable="false"
android:focusableInTouchMode="false"
android:buttonTint="@color/colorPrimary" />
...
...
我想使用oncheckchangedlistener而不是on itemclicklistener,有什么建议吗?您需要创建一个适配器并将其分配给列表 例如:
class MyAdapter extends BaseAdapter { //or ArrayAdapter, or what you prefer
private final CompoundButton.OnCheckedChangeListener listener;
MyAdapter(CompoundButton.OnCheckedChangeListener listener) {
this.listener = listener;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_item);
}
CheckBox checkBox = view.findViewById(R.id.check_box_id);
checkBox.setOnCheckedChangeListener(listener);
return view;
}
}
在你的片段中:
public class AddGroupMembersFragment extends Fragment{
ArrayList<HashMap<Integer, Member>> groupMembersList;
ListView lv;
CheckBox checkBox;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_add_group_members, container, false);
groupMembersList = new ArrayList<>();
lv = (ListView) rootView.findViewById(R.id.group_members_list);
new AddGroupMembersFragment.PostDataAsyncTask().execute();
// Inflate the layout for this fragment
return rootView;
}
AdapterView.OnItemClickListener checkBoxChanged = new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
// AdapterView is the parent class of ListView
ListView lv = (ListView) arg0;
if(lv.isItemChecked(position)){
if(selectAllSubmit.getVisibility()==View.INVISIBLE){
selectAllSubmit.setVisibility(View.VISIBLE);
}
}
}
};
public class PostDataAsyncTask extends AsyncTask<String, String, String> {
...
@Override
protected void onPostExecute(String lenghtOfFile) {
lv.setAdapter(new GroupMembersListAdapter(getActivity(),groupMembersList,1));
lv.setOnItemClickListener(checkBoxChanged);
}
}
公共类StackFragment扩展片段实现CompoundButton.OnCheckedChangeListener{
ListView listView;
MyAdapter adapter;
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// do stuff here
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_add_group_members, container, false);
listView = (ListView) rootView.findViewById(R.id.group_members_list);
adapter = new MyAdapter(this);
listView.setAdapter(adapter);
return rootView;
}
}