过滤列表视图后如何通过单击列表视图项打开原始活动？

Question

我的代码在点击项目时运行良好。但是当我在过滤列表视图后尝试打开活动时出现问题。它总是打开活动 1。

这是我的源代码。

导航.java

    public class navigate extends Activity {

    // Declare Variables
    ListView list;
    ListViewAdapter adapter;
    EditText editsearch;
    String[] rank;
    String[] names;

    int[] flag;
    ArrayList<Object> arraylist = new ArrayList<Object>();

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listview_main);

        // Generate sample data
        rank = new String[] { "1", "2", "3", "4", "5","6","7","8","9","10","11"};

        names = new String[] { "Animal Bite", "Asthma Attack", "Choking","CPR","Black eye",
                "Drowning", "Fracture","Heart Attack","Insect Bite","Poisoning","Spinal Injury",};


        flag = new int[] { R.drawable.animal,
                R.drawable.asthma, R.drawable.choke, R.drawable.cpricon,
                R.drawable.blckeye,R.drawable.drown,R.drawable.fracture,R.drawable.hrtattck,R.drawable.insect,R.drawable.poison,R.drawable.spinal };

        // Locate the ListView in listview_main.xml
        list = (ListView) findViewById(R.id.listview);

        for (int i = 0; i < rank.length; i++) 
        {
            Object wp = new Object(rank[i], names[i], flag[i]);
            // Binds all strings into an array
            arraylist.add(wp);
        }

        // Pass results to ListViewAdapter Class
        adapter = new ListViewAdapter(this, arraylist);

        // Binds the Adapter to the ListView
        list.setAdapter(adapter);

        // Locate the EditText in listview_main.xml
        editsearch = (EditText) findViewById(R.id.search);

        // Capture Text in EditText
        editsearch.addTextChangedListener(new TextWatcher() {

            @Override
            public void afterTextChanged(Editable arg0) {
                // TODO Auto-generated method stub
                String text = editsearch.getText().toString().toLowerCase(Locale.getDefault());
                adapter.filter(text);
            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1,
                    int arg2, int arg3) {
                // TODO Auto-generated method stub
            }

            @Override
            public void onTextChanged(CharSequence arg0, int arg1, int arg2,
                    int arg3) {
                // TODO Auto-generated method stub
            }
        });
        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(final AdapterView<?> listView, View view,
                                    final int position, long id) {
                switch ((int) adapter.getItemId(position)) {
                    case 0:
                        Intent newActivity = new    Intent(navigate.this, animalbite.class);
                        startActivity(newActivity);
                        break;
                    case 1:Intent newActivity1 = new    Intent(navigate.this, asthmaattack.class);
                        startActivity(newActivity1);
                        break;
                    case 2:Intent newActivity2 = new    Intent(navigate.this, animalbite.class);
                        startActivity(newActivity2);
                        break;}

            }
        });
    }


}

ListViewAdapter.java

    public class ListViewAdapter extends BaseAdapter {

    // Declare Variables
    Context mContext;
    LayoutInflater inflater;
    private List<Object> objectList = null;
    private ArrayList<Object> arraylist;

    public ListViewAdapter(Context context,
            List<Object> objectList) {
        mContext = context;

        this.objectList = objectList;
        inflater = LayoutInflater.from(mContext);
        this.arraylist = new ArrayList<Object>();
        this.arraylist.addAll(objectList);

    }



    public class ViewHolder {
        TextView name;
        ImageView flag;
    }

    @Override
    public int getCount() {
        return objectList.size();
    }

    @Override
    public Object getItem(int position) {
        return objectList.get(position);
    }

public String getCountry(int position){return objectList.get(position).getCountry();}
    @Override
    public long getItemId(int position) {
        return position;
    }

    public View getView(final int position, View view, ViewGroup parent) {
        final ViewHolder holder;
        if (view == null) {
            holder = new ViewHolder();
            view = inflater.inflate(R.layout.listview_item, null);
            // Locate the TextViews in listview_item.xml
            //holder.rank = (TextView) view.findViewById(R.id.rank);
            holder.name = (TextView) view.findViewById(R.id.name);

            // Locate the ImageView in listview_item.xml
            holder.flag = (ImageView) view.findViewById(R.id.flag);
            view.setTag(holder);
        } else {
            holder = (ViewHolder) view.getTag();
        }

        // Set the results into TextViews
        //holder.rank.setText(objectList.get(position).getRank());
        holder.name.setText(objectList.get(position).getCountry());
        ;
        // Set the results into ImageView
        holder.flag.setImageResource(objectList.get(position)
                .getFlag());

        // Listen for ListView Item Click
        view.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // Send single item click data to SingleItemView Class

                // Pass all data rank

                // Start SingleItemView Class

                switch (position) {
                    case 0:
                        Intent intent = new Intent(mContext, animalbite.class);
                        mContext.startActivity(intent);break;
                    case 1:
                        Intent i2 = new Intent(mContext, asthmaattack.class);
                        mContext.startActivity(i2);break;
                    case 2:
                        Intent i3 = new Intent(mContext, choking.class);
                        mContext.startActivity(i3);break;
                    case 3:
                        Intent i4 = new Intent(mContext, cpr.class);
                        mContext.startActivity(i4);break;
                    case 4:
                        Intent i5 = new Intent(mContext, lackeye.class);
                        mContext.startActivity(i5);break;
                    case 5:
                        Intent i6 = new Intent(mContext, drowning.class);
                        mContext.startActivity(i6);break;
                    case 6:
                        Intent i7 = new Intent(mContext, Fracture.class);
                        mContext.startActivity(i7);break;
                    case 7:
                        Intent i8 = new Intent(mContext, heartattack.class);
                        mContext.startActivity(i8);break;
                    case 8:
                        Intent i9 = new Intent(mContext, insectbite.class);
                        mContext.startActivity(i9);break;
                    case 9:
                        Intent i10 = new Intent(mContext, poisoning.class);
                        mContext.startActivity(i10);break;
                    case 10:
                        Intent i11 = new Intent(mContext, spinalinjury.class);
                        mContext.startActivity(i11);break;

                }}});

        return view;
    }

    // Filter Class
    public void filter(String charText) {
        charText = charText.toLowerCase(Locale.getDefault());
        objectList.clear();
        if (charText.length() == 0) {
            objectList.addAll(arraylist);
        } else {
            for (Object wp : arraylist) {
                if (wp.getCountry().toLowerCase(Locale.getDefault())
                        .contains(charText)) {
                    objectList.add(wp);
                }
            }
        }
        notifyDataSetChanged();
    }

}

Object.java

    public class Object {
    private String rank;
    private String country;
    private int flag;

    public Object(String rank, String country,
                  int flag) {
        this.rank = rank;
        this.country = country;

        this.flag = flag;
    }



    public String getCountry() {
        return this.country;
    }



    public int getFlag() {
        return this.flag;
    }
}

过滤后如何在单击列表视图项目时打开不同的活动。

这是我使用的示例代码。虽然它不提供通过意图打开原始活动的功能，只是一些伪造的活动，所以我正在尝试改变它。 http://www.androidbegin.com/tutorial/android-search-filter-listview-images-and-texts-tutorial/

Answer 1

我认为您的适配器有问题，我的应用程序的以下示例代码是从 Filterable 扩展的，并且可以正常工作

public class AdapterContacts extends BaseAdapter implements Filterable {

    private LayoutInflater inflater;
    private Context context;
    private List<ContactLists> categoryArrayList;
    private final ArrayList<ContactLists> originalList = new ArrayList<ContactLists>();
    private NameFilter filter;

    public AdapterContacts(ArrayList<ContactLists> array) {
        categoryArrayList = array;
    }

    public AdapterContacts(Context context, List<ContactLists> array) {
        this.context = context;
        inflater = LayoutInflater.from(this.context);
        categoryArrayList = array;
        originalList.addAll(array);
    }

    @Override
    public int getCount() {
        return categoryArrayList.size();
    }

    @Override
    public ContactLists getItem(int position) {
        return categoryArrayList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder mViewHolder;

        if (convertView == null) {
            convertView = inflater.inflate(R.layout.layout_contacts_list_item, null);
            mViewHolder = new ViewHolder(convertView);
            convertView.setTag(mViewHolder);
        } else {
            mViewHolder = (ViewHolder) convertView.getTag();
        }

        ContactLists item = getItem(position);
        mViewHolder.fillItems(this, item, position);

        return convertView;
    }

    private static class UI extends HelperUI {
        public TextView tv_person_nickname_mobile_number;
        public TextView btn_invite_message;
        public ImageView img_contact_image;
        public ImageView imgv_user_rank;
        public TextView tv_contact_name;
        public LinearLayout ll_root;

        public UI(View view) {
            parseUi(view);
        }
    }

    private class ViewHolder {
        private UI UI;

        public ViewHolder(View view) {
            UI = new UI(view);
        }

        public void fillItems(final AdapterContacts adapter, final ContactLists item, final int position) {
            UI.tv_contact_name.setText(item.getContact_name());

            if (item.getStatus() == 1) {
                UI.btn_invite_message.setVisibility(View.GONE);
                UI.imgv_user_rank.setVisibility(View.VISIBLE);

                if (item.getRank() != null || !TextUtils.isEmpty(item.getRank())) {
                    //Picasso.with(G.context).load(item.getRank()).into(UI.imgv_user_rank);
                }

                UI.tv_person_nickname_mobile_number.setText(item.getNick_name());
                //UI.ll_root.setBackgroundDrawable(G.context.getResources().getDrawable(R.drawable.selector_button_actions));
                if (item.getContact_image() == null || TextUtils.isEmpty(item.getContact_image())) {
                    Bitmap bitmap = UC.getContactPhoto(item.getMobile_number(), G.context.getContentResolver());
                    if (bitmap != null) {
                        UI.img_contact_image.setImageBitmap(bitmap);
                    } else {
                        UI.img_contact_image.setImageDrawable(G.context.getResources().getDrawable(R.drawable.no_avatar));
                    }
                } else {
                    // show user avatar from web
                    //Picasso.with(G.context).load(item.getContact_image()).into(UI.img_contact_image);
                    UI.img_contact_image.setImageBitmap(BitmapFactory.decodeFile(G.DIR_IMAGE + "/" + item.getContact_image()));
                }
            } else {
                // UI.ll_root.setBackgroundDrawable(G.context.getResources().getDrawable(R.drawable.selector_invite_actions));
                UI.btn_invite_message.setVisibility(View.VISIBLE);
                UI.imgv_user_rank.setVisibility(View.GONE);
                UI.btn_invite_message.setText(UC.getString(R.string.invite_person));
                UI.btn_invite_message.setBackgroundDrawable(G.context.getResources().getDrawable(R.drawable.shape_invite_button_default));
                UI.tv_person_nickname_mobile_number.setText(item.getMobile_number());
                Bitmap bitmap = UC.getContactPhoto(item.getMobile_number(), G.context.getContentResolver());
                if (bitmap != null) {
                    UI.img_contact_image.setImageBitmap(bitmap);
                } else {
                    UI.img_contact_image.setImageDrawable(G.context.getResources().getDrawable(R.drawable.no_avatar));
                }
            }
        }
    }

    @Override
    public Filter getFilter() {
        if (filter == null) {
            filter = new NameFilter();
        }
        return filter;
    }

    public class NameFilter extends Filter {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults results = new FilterResults();

            String searchText = constraint.toString().toLowerCase();
            ArrayList<ContactLists> newList = filterListBasedOnSearchText(searchText);
            results.values = newList;
            results.count = newList.size();

            return results;
        }

        private ArrayList<ContactLists> filterListBasedOnSearchText(String constraint) {
            ArrayList<ContactLists> newList = new ArrayList<ContactLists>();

            int l = originalList.size();
            for (int i = 0; i < l; i++) {
                ContactLists nameList = originalList.get(i);

                if (nameList.getContact_name().toString().contains(constraint)) {
                    newList.add(nameList);
                }
            }

            return newList;
        }

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint,
                FilterResults results) {
            categoryArrayList = (ArrayList<ContactLists>) results.values;
            notifyDataSetChanged();
        }
    }
}