Java 如何在解析中从数组中删除字符串

我目前正在使用Android的解析API，我的应用程序中目前有一个字符串数组。我当前有一个包含所有字符串的ListView。在我的应用程序中，在ListView本身中，我实现了一个带有

对话框的
setOnItemLongClickListener
。我想从解析中删除选定ListView项的字符串


NotesFragment.java

public class NotesFragment extends Fragment {

    ParseUser user;
    ListView notesList;
    private FloatingActionButton FAB;

    @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_notes, container, false);

        notesList = (ListView) rootView.findViewById(R.id.lv_contact);
        user = ParseUser.getCurrentUser();

        FAB = (FloatingActionButton) rootView.findViewById(R.id.fab);
        FAB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent = new Intent(getContext(), AddNoteActivity.class);
                getActivity().overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_left);
                startActivity(intent);
            }
        });

        final ArrayList<ParseObject> list1 = (ArrayList) user.getList("notes");
        ArrayAdapter<ParseObject> arrayAdapter;
        arrayAdapter = new ArrayAdapter<ParseObject>(getContext(), android.R.layout.simple_list_item_1, list1);

        RelativeLayout emptyView = (RelativeLayout) rootView.findViewById(R.id.empty);

        if (list1 == null) {

            emptyView.setVisibility(View.VISIBLE);


        } else {

            notesList.setAdapter(arrayAdapter);
            emptyView.setVisibility(View.INVISIBLE);

        }

        notesList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
                new AlertDialog.Builder(getContext())
                        .setTitle("Are you sure you want to Delete?")
                        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {

                                ArrayList<String> toRemove = new ArrayList<>();
                                toRemove.add("Hey");
                                ParseUser.getCurrentUser().removeAll("checklistDat", toRemove);
                                ParseUser.getCurrentUser().saveInBackground();
                                ParseUser.getCurrentUser().deleteInBackground();

                            }
                        })


                        .setNegativeButton("No", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {


                            }
                        })
                        .show();
                return true;
            }
        });

        return rootView;
    }

}

    public class NotesFragment extends Fragment {

    ParseUser user;
    ListView notesList;
    ProgressBar mPB;
    private FloatingActionButton FAB;
    ArrayList<ParseObject> list1 = (ArrayList) ParseUser.getCurrentUser().getList("notes");

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_notes, container, false);

        mPB = (ProgressBar) rootView.findViewById(R.id.progress_bar);

        mPB.setVisibility(View.VISIBLE);

        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {
                mPB.setVisibility(View.GONE);
            }

        }, 3500);

        notesList = (ListView) rootView.findViewById(R.id.lv_contact);
        user = ParseUser.getCurrentUser();

        FAB = (FloatingActionButton) rootView.findViewById(R.id.fab);
        FAB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent = new Intent(getContext(), AddNoteActivity.class);
                getActivity().overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_left);
                startActivity(intent);
            }
        });


        final ArrayAdapter<ParseObject> arrayAdapter;
        arrayAdapter = new ArrayAdapter<ParseObject>(getContext(), android.R.layout.simple_list_item_1, list1);

        final RelativeLayout emptyView = (RelativeLayout) rootView.findViewById(R.id.empty);

        if (list1 == null) {

            emptyView.setVisibility(View.VISIBLE);
            mPB.setVisibility(View.GONE);


        } else {

            notesList.setAdapter(arrayAdapter);
            emptyView.setVisibility(View.INVISIBLE);

        }

        notesList.setLongClickable(true);
        notesList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
                new android.app.AlertDialog.Builder(getContext())
                        .setTitle("Delete?")
                        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                list1.remove(position);
                                ParseUser.getCurrentUser().remove("notes");
                                ParseUser.getCurrentUser().put("notes", list1);
                                ParseUser.getCurrentUser().saveInBackground(new SaveCallback() {
                                    @Override
                                    public void done(ParseException e) {

                                        Toast.makeText(getContext(), "Deleted", Toast.LENGTH_SHORT).show();


                                        if (list1.toString().equals("[]")) {

                                            emptyView.setVisibility(View.VISIBLE);
                                            mPB.setVisibility(View.GONE);


                                        } else {

                                            notesList.setAdapter(arrayAdapter);
                                            emptyView.setVisibility(View.INVISIBLE);

                                        }

                                    }
                                });
                            }
                        })


                        .setNegativeButton("No", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {

                            }
                        })
                        .show();
                return true;
            }
        });

        return rootView;
    }
}

public类NotesFragment扩展片段{
解析用户；
列表视图注释列表；
私人浮动按钮制造厂；
@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=充气机。充气（R.layout.fragment\u注释，容器，false）；
notesList=（ListView）rootView.findViewById（R.id.lv_联系人）；
user=ParseUser.getCurrentUser（）；
FAB=（FloatingActionButton）rootView.findViewById（R.id.FAB）；
FAB.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
Intent Intent=新的Intent（getContext（），AddNoteActivity.class）；
getActivity（）.重写EndingTransition（R.anim.slide\u in\u left，R.anim.slide\u out\u left）；
星触觉（意向）；
}
});
最终ArrayList列表1=（ArrayList）user.getList（“注释”）；
ArrayAdapter ArrayAdapter；
arrayAdapter=newArrayAdapter（getContext（），android.R.layout.simple\u list\u item\u 1，list1）；
RelativeLayout emptyView=（RelativeLayout）rootView.findViewById（R.id.empty）；
if（list1==null）{
emptyView.setVisibility（View.VISIBLE）；
}否则{
notesList.setAdapter（arrayAdapter）；
emptyView.setVisibility（View.INVISIBLE）；
}
notesList.setOnItemLongClickListener（新的AdapterView.OnItemLongClickListener（）{
@凌驾
公共布尔值长单击（AdapterView父对象、视图、最终整型位置、长id）{
新建AlertDialog.Builder（getContext（））
.setTitle（“是否确实要删除？”）
.setPositiveButton（“是”，新的DialogInterface.OnClickListener（）{
public void onClick（对话框接口对话框，int whichButton）{
ArrayList toRemove=新建ArrayList（）；
删除。添加（“嘿”）；
ParseUser.getCurrentUser（）.removeAll（“checklistDat”，toRemove）；
ParseUser.getCurrentUser（）.saveInBackground（）；
ParseUser.getCurrentUser（）.deleteInBackground（）；
}
})
.setNegativeButton（“否”，新的DialogInterface.OnClickListener（）{
public void onClick（对话框接口对话框，int whichButton）{
}
})
.show（）；
返回true；
}
});
返回rootView；
}
}
我可以通过这样做来解决这个问题

NotesFragment.java

public class NotesFragment extends Fragment {

    ParseUser user;
    ListView notesList;
    private FloatingActionButton FAB;

    @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_notes, container, false);

        notesList = (ListView) rootView.findViewById(R.id.lv_contact);
        user = ParseUser.getCurrentUser();

        FAB = (FloatingActionButton) rootView.findViewById(R.id.fab);
        FAB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent = new Intent(getContext(), AddNoteActivity.class);
                getActivity().overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_left);
                startActivity(intent);
            }
        });

        final ArrayList<ParseObject> list1 = (ArrayList) user.getList("notes");
        ArrayAdapter<ParseObject> arrayAdapter;
        arrayAdapter = new ArrayAdapter<ParseObject>(getContext(), android.R.layout.simple_list_item_1, list1);

        RelativeLayout emptyView = (RelativeLayout) rootView.findViewById(R.id.empty);

        if (list1 == null) {

            emptyView.setVisibility(View.VISIBLE);


        } else {

            notesList.setAdapter(arrayAdapter);
            emptyView.setVisibility(View.INVISIBLE);

        }

        notesList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {

            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
                new AlertDialog.Builder(getContext())
                        .setTitle("Are you sure you want to Delete?")
                        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {

                                ArrayList<String> toRemove = new ArrayList<>();
                                toRemove.add("Hey");
                                ParseUser.getCurrentUser().removeAll("checklistDat", toRemove);
                                ParseUser.getCurrentUser().saveInBackground();
                                ParseUser.getCurrentUser().deleteInBackground();

                            }
                        })


                        .setNegativeButton("No", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {


                            }
                        })
                        .show();
                return true;
            }
        });

        return rootView;
    }

}

    public class NotesFragment extends Fragment {

    ParseUser user;
    ListView notesList;
    ProgressBar mPB;
    private FloatingActionButton FAB;
    ArrayList<ParseObject> list1 = (ArrayList) ParseUser.getCurrentUser().getList("notes");

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_notes, container, false);

        mPB = (ProgressBar) rootView.findViewById(R.id.progress_bar);

        mPB.setVisibility(View.VISIBLE);

        new Handler().postDelayed(new Runnable() {

            @Override
            public void run() {
                mPB.setVisibility(View.GONE);
            }

        }, 3500);

        notesList = (ListView) rootView.findViewById(R.id.lv_contact);
        user = ParseUser.getCurrentUser();

        FAB = (FloatingActionButton) rootView.findViewById(R.id.fab);
        FAB.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Intent intent = new Intent(getContext(), AddNoteActivity.class);
                getActivity().overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_left);
                startActivity(intent);
            }
        });


        final ArrayAdapter<ParseObject> arrayAdapter;
        arrayAdapter = new ArrayAdapter<ParseObject>(getContext(), android.R.layout.simple_list_item_1, list1);

        final RelativeLayout emptyView = (RelativeLayout) rootView.findViewById(R.id.empty);

        if (list1 == null) {

            emptyView.setVisibility(View.VISIBLE);
            mPB.setVisibility(View.GONE);


        } else {

            notesList.setAdapter(arrayAdapter);
            emptyView.setVisibility(View.INVISIBLE);

        }

        notesList.setLongClickable(true);
        notesList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
                new android.app.AlertDialog.Builder(getContext())
                        .setTitle("Delete?")
                        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                list1.remove(position);
                                ParseUser.getCurrentUser().remove("notes");
                                ParseUser.getCurrentUser().put("notes", list1);
                                ParseUser.getCurrentUser().saveInBackground(new SaveCallback() {
                                    @Override
                                    public void done(ParseException e) {

                                        Toast.makeText(getContext(), "Deleted", Toast.LENGTH_SHORT).show();


                                        if (list1.toString().equals("[]")) {

                                            emptyView.setVisibility(View.VISIBLE);
                                            mPB.setVisibility(View.GONE);


                                        } else {

                                            notesList.setAdapter(arrayAdapter);
                                            emptyView.setVisibility(View.INVISIBLE);

                                        }

                                    }
                                });
                            }
                        })


                        .setNegativeButton("No", new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {

                            }
                        })
                        .show();
                return true;
            }
        });

        return rootView;
    }
}

public类NotesFragment扩展片段{
解析用户；
列表视图注释列表；
ProgressBar mPB；
私人浮动按钮制造厂；
ArrayList list1=（ArrayList）ParseUser.getCurrentUser（）.getList（“注释”）；
@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=充气机。充气（R.layout.fragment\u注释，容器，false）；
mPB=（ProgressBar）rootView.findviewbyd（R.id.progress\u bar）；
mPB.setVisibility（View.VISIBLE）；
new Handler（）.postDelayed（new Runnable（））{
@凌驾
公开募捐{
mPB.setVisibility（View.GONE）；
}
}, 3500);
notesList=（ListView）rootView.findViewById（R.id.lv_联系人）；
user=ParseUser.getCurrentUser（）；
FAB=（FloatingActionButton）rootView.findViewById（R.id.FAB）；
FAB.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
Intent Intent=新的Intent（getContext（），AddNoteActivity.class）；
getActivity（）.重写EndingTransition（R.anim.slide\u in\u left，R.anim.slide\u out\u left）；
星触觉（意向）；
}
});
最终阵列适配器阵列适配器；
arrayAdapter=newArrayAdapter（getContext（），android.R.layout.simple\u list\u item\u 1，list1）；
final RelativeLayout emptyView=（RelativeLayout）rootView.findViewById（R.id.empty）；
if（list1==null）{
emptyView.setVisibility（View.VISIBLE）；
mPB.setVisibility（View.GONE）；
}否则{
notesList.setAdapter（arrayAdapter）；
emptyView.setVisibility（View.INVISIBLE）；
}
notesList.setLongClickable（true）；
notesList.setOnItemLongClickListener（新的AdapterView.OnItemLongClickListener（）{
@凌驾
公共布尔值长单击（AdapterView父对象、视图、最终整型位置、长id）{
新的android.app.AlertDialog.Builder（getContext（））
.setTitle（“删除？”）
.setPositiveButton（“是”，新的DialogInterface.OnClickListener（）{
public void onClick（对话框接口对话框，int whichButton）{
列表1.移除（位置）；
ParseUser.getCurrentUser（）.remove（“注释”）；
ParseUser.getCurrentUser（）.put（“注释”，列表1）；