我的代码不适用于搜索功能

Question

我的代码给出了电话联系人详细信息，即电话号码和联系人姓名。我使用了以下代码，但在搜索功能方面无效。请给我更多建议。我收到了来自servers_adp.getFilter（）的错误。过滤器（文本）;这里显示了getFilter（）

的create方法错误

package com.syphersafe.securefiles;
public class ContactsActivity extends BaseActivity{
EditText searchcontact_et;
ArrayList<String> namearr,numarr,photoarr;
ArrayAdapter<String> adp;
ServerAdapter servers_adp;
ListView lstContacts;
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_contacts);
    searchcontact_et=(EditText)findViewById(R.id.editTextSeachcontact);
    servers_adp = new ServerAdapter();
    namearr =   new ArrayList<String>();
    numarr      =   new ArrayList<String>();
    photoarr   =  new ArrayList<String>();
    ListView lstContacts = (ListView) findViewById(R.id.lst_contacts);
      searchcontact_et.addTextChangedListener(new TextWatcher() {
private boolean mCountIncreased;
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)  {}
@Override
            public void beforeTextChanged(CharSequence s, int start, int    count,int after) {}
  @Override
  public void afterTextChanged(Editable s) {
  String text =     searchcontact_et.getText().toString().toLowerCase(Locale.getDefault());
                servers_adp.getFilter().filter(text);
            }
        });
}

 protected void onStart() {
    // TODO Auto-generated method stub

    Cursor cursornum = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
    if (cursornum != null) {
        while (cursornum.moveToNext()) {
            String contactname  =    cursornum.getString(cursornum.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
            String contactnum   =    cursornum.getString(cursornum.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

            namearr.add(contactname);
            numarr.add(contactnum);
            //photoarr.add(photoPath);
        }
    }lstContacts = (ListView) findViewById(R.id.lst_contacts);
     lstContacts.setAdapter(servers_adp);super.onStart();
}
public class ServerAdapter extends BaseAdapter{
public int getCount() {
    // TODO Auto-generated method stub
    return namearr.size();
}
public Object getFilter() {
    // TODO Auto-generated method stub
    return new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults();

            if (constraint == null || constraint.length() == 0) {
                //no constraint given, just return all the data. (no search)
                results.count = list.size();
                results.values = list;
            } else {//do the search
                List<String> resultsData = new ArrayList<>();
                String searchStr = constraint.toString().toUpperCase();
                for (String s : list)
                    if (s.toUpperCase().contains(searchStr)) resultsData.add(s);
                results.count = resultsData.size();
                results.values = resultsData;
            }

            return results;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            listFiltered = (ArrayList<String>) results.values;
            notifyDataSetChanged();
        }
    };
}
public Object getItem(int position) {
    // TODO Auto-generated method stub
    return position;
}
public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
    View v = null;
    LayoutInflater inflater = getLayoutInflater();
    v = inflater.inflate(R.layout.lv_layout, null);
    TextView contact_name = (TextView)v.findViewById(R.id.contact_name);
    ImageView contact_photo = (ImageView)v.findViewById(R.id.contact_photo);
    TextView contact_num=(TextView)findViewById(R.id.contact_number);
    try {
        String arlstname[] = namearr.get(position).split(",");
        String arlstnumber[] = numarr.get(position).split(",");
        for (int i = 0; i < arlstname.length; i++) {
            contact_name.setText(arlstname[i]);
            contact_num.setText(arlstnumber[i]);
            if(arlstname[i].equals("Lav")|| arlstname[i].equals("Teja")){
                Drawable myDrawable = getResources().getDrawable(R.drawable.call_person);
                contact_photo.setImageDrawable(myDrawable);
                 }
            else{
                Drawable myDrawable = getResources().getDrawable(R.drawable.ic_launcher);
                contact_photo.setImageDrawable(myDrawable);
              }
        }
    } 
    catch (Exception e) {
        // TODO: handle exception
    }
    return v;
}
}   
}

Answer 1

首先使您的适配器实现Filterable。添加方法会出错。添加方法

    public Filter getFilter() {
     }

在该方法中复制粘贴public Object getFilter（）方法中的所有代码。完成后，删除公共Object getFilter（）方法。

它应该有用。

    public class ContactsActivity extends BaseActivity{
EditText searchcontact_et;
ArrayList<String> namearr,numarr,photoarr;
ArrayAdapter<String> adp;
ServerAdapter servers_adp;
ListView lstContacts;
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_contacts);
    searchcontact_et=(EditText)findViewById(R.id.editTextSeachcontact);
    servers_adp = new ServerAdapter();
    namearr =   new ArrayList<String>();
    numarr      =   new ArrayList<String>();
    photoarr   =  new ArrayList<String>();
    ListView lstContacts = (ListView) findViewById(R.id.lst_contacts);
    searchcontact_et.addTextChangedListener(new TextWatcher() {
        private boolean mCountIncreased;
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count)  {}
        @Override
        public void beforeTextChanged(CharSequence s, int start, int    count,int after) {}
        @Override
        public void afterTextChanged(Editable s) {
            String text =     searchcontact_et.getText().toString().toLowerCase(Locale.getDefault());
            servers_adp.getFilter().filter(text);
        }
    });
}

protected void onStart() {
    // TODO Auto-generated method stub

    Cursor cursornum = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
    if (cursornum != null) {
        while (cursornum.moveToNext()) {
            String contactname  =    cursornum.getString(cursornum.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
            String contactnum   =    cursornum.getString(cursornum.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

            namearr.add(contactname);
            numarr.add(contactnum);
            //photoarr.add(photoPath);
        }
    }lstContacts = (ListView) findViewById(R.id.lst_contacts);
    lstContacts.setAdapter(servers_adp);super.onStart();
}
public class ServerAdapter extends BaseAdapter implements Filterable{
    public int getCount() {
        // TODO Auto-generated method stub
        return namearr.size();
    }
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        View v = null;
        LayoutInflater inflater = getLayoutInflater();
        v = inflater.inflate(R.layout.lv_layout, null);
        TextView contact_name = (TextView)v.findViewById(R.id.contact_name);
        ImageView contact_photo = (ImageView)v.findViewById(R.id.contact_photo);
        TextView contact_num=(TextView)findViewById(R.id.contact_number);
        try {
            String arlstname[] = namearr.get(position).split(",");
            String arlstnumber[] = numarr.get(position).split(",");
            for (int i = 0; i < arlstname.length; i++) {
                contact_name.setText(arlstname[i]);
                contact_num.setText(arlstnumber[i]);
                if(arlstname[i].equals("Lav")|| arlstname[i].equals("Teja")){
                    Drawable myDrawable = getResources().getDrawable(R.drawable.call_person);
                    contact_photo.setImageDrawable(myDrawable);
                }
                else{
                    Drawable myDrawable = getResources().getDrawable(R.drawable.ic_launcher);
                    contact_photo.setImageDrawable(myDrawable);
                }
            }
        }
        catch (Exception e) {
            // TODO: handle exception
        }
        return v;
    }

    @Override
    public Filter getFilter() {
        return new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults results = new FilterResults();

                if (constraint == null || constraint.length() == 0) {
                    //no constraint given, just return all the data. (no search)
                    results.count = list.size();
                    results.values = list;
                } else {//do the search
                    List<String> resultsData = new ArrayList<>();
                    String searchStr = constraint.toString().toUpperCase();
                    for (String s : list)
                        if (s.toUpperCase().contains(searchStr)) resultsData.add(s);
                    results.count = resultsData.size();
                    results.values = resultsData;
                }

                return results;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                listFiltered = (ArrayList<String>) results.values;
                notifyDataSetChanged();
            }
        };
    }
}

}