Android DialogFragment中的ListView将无法保持最新
我有一个非常恼人的问题与对话片段和backbackback 我有一个主活动，它承载一个ActiveMenuFragment ActiveMenuFragment有一个按钮，用于启动对话框FragmentActionSelector（所有方法都从MainActivity强制接口方法运行）： 此片段显示一个包含操作列表的ListView。现在一切都很好。甚至以前添加的新操作也会显示在这里。现在，如果用户想要定义一个新动作，他们会按下DialogFragment中的一个按钮，启动DialogFragmentDefineWaction：Android DialogFragment中的ListView将无法保持最新,android,listview,android-fragments,android-arrayadapter,back-stack,Android,Listview,Android Fragments,Android Arrayadapter,Back Stack,我有一个非常恼人的问题与对话片段和backbackback 我有一个主活动，它承载一个ActiveMenuFragment ActiveMenuFragment有一个按钮，用于启动对话框FragmentActionSelector（所有方法都从MainActivity强制接口方法运行）： 此片段显示一个包含操作列表的ListView。现在一切都很好。甚至以前添加的新操作也会显示在这里。现在，如果用户想要定义一个新动作，他们会按下DialogFragment中的一个按钮，启动DialogFragm
/**
* Opens the action selection dialog, so the user may pick an action to
* begin.
*/
@Override
public void openActionSelector() {
actionSelectorFragment = DialogFragmentActionSelector.newInstance();
Bundle args = new Bundle();
args.putSerializable("Profile", currentProfile);
actionSelectorFragment.setArguments(args);
FragmentTransaction ft = this.getFragmentManager().beginTransaction();
ft.addToBackStack("Action Selector");
actionSelectorFragment.show(ft, "Action Selector");
}
/**
* Takes the action defined in the DefineNewAction fragment and adds it to
* the user dictionary.
*/
@Override
public void addNewActionToDictionary(Action toAdd) {
currentProfile.getDictionary().addDefinition(toAdd);
actionSelectorFragment.updateProfile(currentProfile);
}
public class DialogFragmentActionSelector extends DialogFragment implements
OnClickListener {
private EditText searchBar;
private Button defineNewActionBtn;
private ListView actionList;
private UserProfile user;
private ListViewInterface mInterface;
private ActionsAdapter adapter;
public interface ListViewInterface {
void openDefineNewAction();
void setActiveMenuActionBar(String action);
}
public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof ListViewInterface) {
mInterface = (ListViewInterface) activity;
} else {
throw new ClassCastException(activity.toString()
+ " must implement ListViewInterface");
}
}
/**
* Constructor for the fragment.
*
* @return
*/
public static DialogFragmentActionSelector newInstance() {
DialogFragmentActionSelector dfm = new DialogFragmentActionSelector();
return dfm;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View toReturn = inflater.inflate(
R.layout.fragment_action_selector_layout, container, false);
user = (UserProfile) this.getArguments().get("Profile");
searchBar = (EditText) toReturn.findViewById(R.id.action_search_bar);
searchBar.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) {
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
}
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
adapter.updateList();
adapter.getFilter().filter(arg0);
}
});
defineNewActionBtn = (Button) toReturn
.findViewById(R.id.define_new_action);
defineNewActionBtn.setOnClickListener(this);
actionList = (ListView) toReturn.findViewById(R.id.actions_list);
ArrayList<Action> allActions = user.getDictionary().getAllActions();
adapter = new ActionsAdapter(this.getActivity(),
android.R.layout.simple_list_item_1, allActions, inflater);
actionList.setAdapter(adapter);
actionList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View clickedView,
int index, long id) {
Action selectedAction = (Action) parent.getItemAtPosition(index);
mInterface.setActiveMenuActionBar(selectedAction.getActionName());
dismiss();
}
});
return toReturn;
}
public void updateProfile(UserProfile updatedProfile) {
user = updatedProfile;
ArrayList<Action> allActions = user.getDictionary().getAllActions();
adapter = new ActionsAdapter(this.getActivity(),
android.R.layout.simple_list_item_1, allActions, getActivity()
.getLayoutInflater());
actionList.setAdapter(adapter);
actionList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View clickedView,
int index, long id) {
Action selectedAction = (Action) parent.getItemAtPosition(index);
mInterface.setActiveMenuActionBar(selectedAction.getActionName());
dismiss();
}
});
// this.updateListView();
}
private void updateListView() {
adapter.updateList();
}
// TODO FIX CONSTRUCTOR. UPON RETURNING, IT REVERTS TO DEFAULT 8 ACTIONS
// RATHER THAN NEW ONES.
private class ActionsAdapter extends ArrayAdapter<Action> implements
Filterable {
LayoutInflater inflater;
ArrayList<Action> actionsList;
public ActionsAdapter(Context context, int resId,
ArrayList<Action> objects, LayoutInflater inflater) {
super(context, resId, objects);
this.actionsList = objects;
this.inflater = inflater;
}
@Override
public int getCount() {
return actionsList.size();
}
@Override
public Action getItem(int position) {
return actionsList.get(position);
}
@Override
public long getItemId(int position) {
return this.getItem(position).hashCode();
}
public void updateList() {
ArrayList<Action> allActions = user.getDictionary().getAllActions();
actionsList = allActions;
notifyDataSetInvalidated();
// notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
Action toWrap = actionsList.get(position);
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(
R.layout.listview_row_action_selector, parent, false);
holder.actionName = (TextView) convertView
.findViewById(R.id.action_title);
convertView.setTag(holder);
} else
holder = (ViewHolder) convertView.getTag();
holder.actionName.setText(toWrap.getActionName());
return convertView;
}
private class ViewHolder {
TextView actionName;
}
/**
* Filters the adapter's database.
*/
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
ArrayList<Action> matchingActions = new ArrayList<Action>();
for (int i = 0; i < actionsList.size(); i++) {
Action actionToCheck = actionsList.get(i);
ArrayList<String> actionTags = actionToCheck.getTags();
String searchQuery = constraint.toString();
boolean foundMatch = false;
int k = 0;
int tagSize = actionTags.size();
if (tagSize != 0) {
while (!foundMatch && k < tagSize) {
if (actionTags.get(k).contains(searchQuery)) {
matchingActions.add(actionToCheck);
foundMatch = true;
}
k++;
}
}
}
results.count = matchingActions.size();
results.values = matchingActions;
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// actionsList.clear();
actionsList = (ArrayList<Action>) results.values;
adapter.notifyDataSetChanged();
}
};
return filter;
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.define_new_action:
mInterface.openDefineNewAction();
break;
default:
break;
}
}
public void addNewActionToDictionary(Action toAdd) {
user.getDictionary().addDefinition(toAdd);
adapter.add(toAdd);
adapter.updateList();
}
}
公共类DialogFragmentActionSelector扩展DialogFragment实现
onclick侦听器{
私人编辑文本搜索栏；
专用按钮定义功能BTN；
私有列表视图操作列表；
私有用户配置文件用户；
私有ListViewInterface mInterface；
私有操作适配器；
公共接口ListViewInterface{
void openDefineNewAction（）；
void setActiveMenuActionBar（字符串操作）；
}
公共事务主任（活动）{
超级转速计（活动）；
if（ListViewInterface的活动实例）{
mInterface=（ListViewInterface）活动；
}否则{
抛出新的ClassCastException（activity.toString（）
+“必须实现ListViewInterface”）；
}
}
/**
*片段的构造函数。
*
*@返回
*/
公共静态对话框FragmentActionSelector newInstance（）{
DialogFragmentActionSelector dfm=新建DialogFragmentActionSelector（）；
返回dfm；
}
@凌驾
创建视图上的公共视图（布局、充气机、视图组容器、，
Bundle savedInstanceState）{
查看toReturn=充气机。充气(
R.layout.fragment\u action\u selector\u布局，容器，false）；
user=（UserProfile）this.getArguments（）.get（“Profile”）；
searchBar=（EditText）toReturn.findViewById（R.id.action\u search\u bar）；
addTextChangedListener（新的TextWatcher（）{
@凌驾
public void PostTextChanged（可编辑arg0）{
}
@凌驾
更改前的公共void（字符序列arg0、int arg1、int arg2、，
int arg3）{
}
@凌驾
public void onTextChanged（字符序列arg0、int arg1、int arg2、，
int arg3）{
adapter.updateList（）；
adapter.getFilter（）.filter（arg0）；
}
});
DefineWactionBTN=（按钮）返回
.findviewbyd（R.id.define\u new\u action）；
defineNewActionBtn.setOnClickListener（此）；
actionList=（ListView）toreReturn.findViewById（R.id.actions\u list）；
ArrayList allActions=user.getDictionary（）.getAllActions（）；
adapter=new ActionsAdapter（this.getActivity（），
android.R.layout.simple_list_item_1，allActions，充气机）；
actionList.setAdapter（适配器）；
actionList.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（适配器查看父级，查看单击查看，
int索引，长id）{
Action selectedAction=（Action）parent.getItemAtPosition（索引）；
mInterface.setActiveMenuActionBar（selectedAction.getActionName（））；
解雇（）；
}
});
回归回归；
}
公共无效更新配置文件（UserProfile updatedProfile）{
user=updatedProfile；
ArrayList allActions=user.getDictionary（）.getAllActions（）；
adapter=new ActionsAdapter（this.getActivity（），
android.R.layout.simple_list_item_1，allActions，getActivity（）
.getLayoutInflater（））；
actionList.setAdapter（适配器）；
actionList.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（适配器查看父级，查看单击查看，
int索引，长id）{
Action selectedAction=（Action）parent.getItemAtPosition（索引）；
mInterface.setActiveMenuActionBar（selectedAction.getActionName（））；
解雇（）；
}
});
//this.updateListView（）；
}
私有void updateListView（）{
adapter.updateList（）；
}
//TODO修复构造函数。返回后，它将恢复为默认的8个操作
//而不是新的。
私有类ActionsAdapter扩展了ArrayAdapter实现
可过滤{
充气机；
ArrayList actionsList；
公共行动ADAPTER（上下文，int resId，
ArrayList对象，布局（充气机）{
超级（上下文、剩余、对象）；
this.actionsList=对象；
这个。充气机=充气机；
}
@凌驾
public int getCount（）{
返回actionsList.size（）；
}
@凌驾
公共操作getItem（内部位置）{
返回操作列表。获取（位置）；
}
@凌驾
公共长getItemId（int位置）{
返回此.getItem（position）.hashCode（）；
}
公共void updateList（）{
ArrayList allActions=user.getDictionary（）.getAllActions（）；
动作列表=所有动作；
notifyDataSetionValidated（）；
//notifyDataSetChanged（）；
}
@凌驾
公共视图getView（int位置、视图转换视图、视图组父视图）{
ViewHolder=null；
Action toWrap=actionsList.get（位置）；
if（convertView==null）{
holder=新的ViewHolder（）；
convertView=充气机。充气(
R
public class DialogFragmentActionSelector extends DialogFragment implements
OnClickListener {
private EditText searchBar;
private Button defineNewActionBtn;
private ListView actionList;
private UserProfile user;
private ListViewInterface mInterface;
private ActionsAdapter adapter;
public interface ListViewInterface {
void openDefineNewAction();
void setActiveMenuActionBar(String action);
}
public void onAttach(Activity activity) {
super.onAttach(activity);
if (activity instanceof ListViewInterface) {
mInterface = (ListViewInterface) activity;
} else {
throw new ClassCastException(activity.toString()
+ " must implement ListViewInterface");
}
}
/**
* Constructor for the fragment.
*
* @return
*/
public static DialogFragmentActionSelector newInstance() {
DialogFragmentActionSelector dfm = new DialogFragmentActionSelector();
return dfm;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View toReturn = inflater.inflate(
R.layout.fragment_action_selector_layout, container, false);
user = (UserProfile) this.getArguments().get("Profile");
searchBar = (EditText) toReturn.findViewById(R.id.action_search_bar);
searchBar.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) {
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
}
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
adapter.updateList();
adapter.getFilter().filter(arg0);
}
});
defineNewActionBtn = (Button) toReturn
.findViewById(R.id.define_new_action);
defineNewActionBtn.setOnClickListener(this);
actionList = (ListView) toReturn.findViewById(R.id.actions_list);
ArrayList<Action> allActions = user.getDictionary().getAllActions();
adapter = new ActionsAdapter(this.getActivity(),
android.R.layout.simple_list_item_1, allActions, inflater);
actionList.setAdapter(adapter);
actionList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View clickedView,
int index, long id) {
Action selectedAction = (Action) parent.getItemAtPosition(index);
mInterface.setActiveMenuActionBar(selectedAction.getActionName());
dismiss();
}
});
return toReturn;
}
public void updateProfile(UserProfile updatedProfile) {
user = updatedProfile;
ArrayList<Action> allActions = user.getDictionary().getAllActions();
adapter = new ActionsAdapter(this.getActivity(),
android.R.layout.simple_list_item_1, allActions, getActivity()
.getLayoutInflater());
actionList.setAdapter(adapter);
actionList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View clickedView,
int index, long id) {
Action selectedAction = (Action) parent.getItemAtPosition(index);
mInterface.setActiveMenuActionBar(selectedAction.getActionName());
dismiss();
}
});
// this.updateListView();
}
private void updateListView() {
adapter.updateList();
}
// TODO FIX CONSTRUCTOR. UPON RETURNING, IT REVERTS TO DEFAULT 8 ACTIONS
// RATHER THAN NEW ONES.
private class ActionsAdapter extends ArrayAdapter<Action> implements
Filterable {
LayoutInflater inflater;
ArrayList<Action> actionsList;
public ActionsAdapter(Context context, int resId,
ArrayList<Action> objects, LayoutInflater inflater) {
super(context, resId, objects);
this.actionsList = objects;
this.inflater = inflater;
}
@Override
public int getCount() {
return actionsList.size();
}
@Override
public Action getItem(int position) {
return actionsList.get(position);
}
@Override
public long getItemId(int position) {
return this.getItem(position).hashCode();
}
public void updateList() {
ArrayList<Action> allActions = user.getDictionary().getAllActions();
actionsList = allActions;
notifyDataSetInvalidated();
// notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
Action toWrap = actionsList.get(position);
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(
R.layout.listview_row_action_selector, parent, false);
holder.actionName = (TextView) convertView
.findViewById(R.id.action_title);
convertView.setTag(holder);
} else
holder = (ViewHolder) convertView.getTag();
holder.actionName.setText(toWrap.getActionName());
return convertView;
}
private class ViewHolder {
TextView actionName;
}
/**
* Filters the adapter's database.
*/
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
ArrayList<Action> matchingActions = new ArrayList<Action>();
for (int i = 0; i < actionsList.size(); i++) {
Action actionToCheck = actionsList.get(i);
ArrayList<String> actionTags = actionToCheck.getTags();
String searchQuery = constraint.toString();
boolean foundMatch = false;
int k = 0;
int tagSize = actionTags.size();
if (tagSize != 0) {
while (!foundMatch && k < tagSize) {
if (actionTags.get(k).contains(searchQuery)) {
matchingActions.add(actionToCheck);
foundMatch = true;
}
k++;
}
}
}
results.count = matchingActions.size();
results.values = matchingActions;
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
// actionsList.clear();
actionsList = (ArrayList<Action>) results.values;
adapter.notifyDataSetChanged();
}
};
return filter;
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.define_new_action:
mInterface.openDefineNewAction();
break;
default:
break;
}
}
public void addNewActionToDictionary(Action toAdd) {
user.getDictionary().addDefinition(toAdd);
adapter.add(toAdd);
adapter.updateList();
}
}