使用edittext搜索数据列表视图

时间：2017-08-22 06:31:11

标签： java android json listview android-edittext

我正在使用themoviedb API创建一个Movie Catalog应用。如何使用EditText实现搜索？

我有一个包含电影信息的列表视图。

应用截图：

现在我想使用EditText查找另一部电影，并更新列表视图。我该怎么做？

我的装载机：

testprogram arg1 5

我的适配器：

public class MyAsyncTaskLoader extends AsyncTaskLoader<ArrayList<MovieItem>> {

    public ArrayList<MovieItem> mData;
    public boolean hasResult = false;

    public MyAsyncTaskLoader(final Context context) {
        super(context);
        onContentChanged();
        Log.d("INIT ASYNCLOADER","1");
    }

    @Override
    protected void onStartLoading() {
        Log.d("Content Changed","1");
        if (takeContentChanged())
            forceLoad();
        else if (hasResult)
            deliverResult(mData);
    }

    @Override
    public void deliverResult(final ArrayList<MovieItem> data) {
        mData = data;
        hasResult = true;
        super.deliverResult(data);
    }

    @Override
    protected void onReset() {
        super.onReset();
        onStopLoading();
        if (hasResult) {
            onReleaseResources(mData);
            mData = null;
            hasResult = false;
        }
    }

    public static String Search = "Avengers";
    public static String API_KEY = "f00e74c69ff0512cf9e5bf128569f6b5";

    @Override
    public ArrayList<MovieItem> loadInBackground() {
        Log.d("LOAD BG","1");
        SyncHttpClient client = new SyncHttpClient();
        final ArrayList<MovieItem> movieItemses = new ArrayList<>();
        final String url = "https://api.themoviedb.org/3/search/movie?api_key="+API_KEY+"&language=en-US&query="+Search;
                client.get(url, new AsyncHttpResponseHandler() {
            @Override
            public void onStart() {
                super.onStart();
                setUseSynchronousMode(true);
            }

            @Override
            public void onSuccess(int statusCode, Header[] headers,
                                  byte[] responseBody) {
                try {
                    String result = new String(responseBody);
                    JSONObject responseObject = new JSONObject(result);
                    JSONArray list = responseObject.getJSONArray("results");

                    for (int i = 0 ; i < list.length() ; i++){
                        JSONObject movie = list.getJSONObject(i);
                        MovieItem movieItems = new MovieItem(movie);
                        movieItemses.add(movieItems);
                    }
                    Log.d("REQUEST SUCCESS","1");
                }catch (Exception e){
                    e.printStackTrace();
                    Log.d("REQUEST FAILED","1");
                }
            }

            @Override
            public void onFailure(int statusCode, Header[] headers,
                                  byte[] responseBody, Throwable error) {
            }
        });

        for (int i = 0 ; i< movieItemses.size() ; i++){
            Log.d("Title",movieItemses.get(i).getTitle());
        }
        Log.d("BEFORE RETURN","1");

        return movieItemses;
    }

    protected void onReleaseResources(ArrayList<MovieItem> data) {
        //nothing to do.
    }
    public ArrayList<MovieItem> getResult() {
        return mData;
    }
}

项目：

public class MovieAdapter extends BaseAdapter {

    private ArrayList<MovieItem> mData = new ArrayList<>();
    private LayoutInflater mInflater;
    private Context context;
    Activity activity;

    private String urlConfig ;
    public MovieAdapter(Context context) {
        this.context = context;
        mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public void setData(ArrayList<MovieItem> items){
        mData = items;
        notifyDataSetChanged();
    }

    public void clearData(){
        mData.clear();
    }

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

    @Override
    public int getViewTypeCount() {
        return 1;
    }

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

    @Override
    public MovieItem getItem(int position) {
        return mData.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            holder = new ViewHolder();

            convertView = mInflater.inflate(R.layout.item_row_film, null);

            holder.textViewuJudul= (TextView)convertView.findViewById(R.id.tv_judul);

            holder.textViewDescription = (TextView)convertView.findViewById(R.id.tv_deskripsi);
            holder.textViewRate = (TextView)convertView.findViewById(R.id.tv_rate);
            holder.imgPoster = (ImageView) convertView.findViewById(R.id.img_poster);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.textViewuJudul.setText(mData.get(position).getTitle());
        holder.textViewDescription.setText(mData.get(position).getDescription());
        holder.textViewRate .setText(mData.get(position).getRate());
        Picasso.with(context).load(mData.get(position).getImgurl()).into(holder.imgPoster);
        return convertView;
    }

    private class ViewHolder {
        public TextView textViewuJudul;
        public TextView textViewDescription;
        public TextView textViewRate;
        public ImageView imgPoster;
    }}

我的主要活动：

public class MovieItem  {

    public static String POSTER_BASE_URL = "http://image.tmdb.org/t/p/";
    private int id;
    private String title;
    private String description;
    private String rate;
    private String imgurl;

    public  MovieItem(JSONObject object){

        try {
            String title = object.getString("title");
            String description = object.getString("overview");
            double movieRatet = object.getDouble("vote_average");
            String movieRate = new DecimalFormat("#.#").format(movieRatet);
            String releaseDate = object.getString("release_date");
            String posterUrl = object.getString("poster_path");
            posterUrl = POSTER_BASE_URL + "w185" + posterUrl;
            description = description.length() > 64 ? description.substring(0,64)+"...":description;

            Log.d("movie poster", posterUrl);
            Log.d("movie title ", title);
            Log.d("movie description ", description);
            Log.d("movie release ", releaseDate);



            this.title = title;
            this.description = description;
            this.rate = releaseDate;
            this.imgurl = posterUrl;


        }catch (Exception e){

            e.printStackTrace();
        }
    }

2 个答案:

答案 0 :(得分：2)

将MovieAdapter替换为此...！

 public class MovieAdapter extends BaseAdapter implements Filterable {

        private ArrayList<MovieItem> mData = new ArrayList<>();
        private ArrayList<MovieItem> mSearchData = new ArrayList<>();
        private ArrayList<MovieItem> categoryListOne = new ArrayList<>();
        private LayoutInflater mInflater;
        private Context context;
        Activity activity;
        ItemFilter mFilter = new ItemFilter();

        private String urlConfig;

        public MovieAdapter(Context context) {
            this.context = context;
            mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }

        public void setData(ArrayList<MovieItem> items) {
            mData = items;
            mSearchData = items;
            notifyDataSetChanged();
        }

        public void clearData() {
            mData.clear();
        }

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

        @Override
        public int getViewTypeCount() {
            return 1;
        }

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

        @Override
        public MovieItem getItem(int position) {
            return mData.get(position);
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                holder = new ViewHolder();

                convertView = mInflater.inflate(R.layout.item_row_film, null);

                holder.textViewuJudul = (TextView) convertView.findViewById(R.id.tv_judul);

                holder.textViewDescription = (TextView) convertView.findViewById(R.id.tv_deskripsi);
                holder.textViewRate = (TextView) convertView.findViewById(R.id.tv_rate);
                holder.imgPoster = (ImageView) convertView.findViewById(R.id.img_poster);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }

            holder.textViewuJudul.setText(mData.get(position).getTitle());
            holder.textViewDescription.setText(mData.get(position).getDescription());
            holder.textViewRate.setText(mData.get(position).getRate());
            Picasso.with(context).load(mData.get(position).getImgurl()).into(holder.imgPoster);
            return convertView;
        }

        @Override
        public Filter getFilter() {
            return mFilter;
        }

        public class ItemFilter extends Filter {
            @Override
            protected FilterResults performFiltering(CharSequence constraint) {

                constraint = constraint.toString().toLowerCase().replace(" ", "");
                Log.v("DataAdapter", "constratinst : " + constraint);
                FilterResults result = new FilterResults();
                if (constraint.toString().length() > 0) {
                    ArrayList<Sticker> filteredItems =
                            new ArrayList<>();
                    for (int i = 0, l = mData.size(); i < l; i++) {
                        // ArrayList<HashMap<String, String>> p =
                        // originalList.get(i);
                        String p = mData.get(i).getName().toLowerCase().replace(" ", "");
                        if (p.toLowerCase().startsWith(String.valueOf(constraint)))
                            filteredItems.add(mData.get(i));

    //                    if (p.toLowerCase().contains(constraint))
    //                        filteredItems.add(categoryListSearch.get(i));
                    }
                    Log.v("DataAdapter", "not blank");
                    result.count = filteredItems.size();
                    result.values = filteredItems;

                } else {
                    synchronized (this) {
                        result.count = categoryListOne.size();
                        result.values = categoryListOne;
    //                    result.values = dataList;
    //                    result.count = dataList.size();
                    }
                }
                return result;
            }

            @Override
            protected void publishResults(CharSequence constraint, FilterResults results) {
                // users = (List<GraphUser>) results.values;
                //filteredData = (ArrayList<String>) results.values;
                mData = (ArrayList<MovieItem>) results.values;
                notifyDataSetChanged();

    //            for (int i = 0, l = mData.size(); i < l; i++)
    //                mSearchData.get(i);
                //add(productList.get(i));

                notifyDataSetInvalidated();
            }
        }


        private class ViewHolder {

            public TextView textViewuJudul;
            public TextView textViewDescription;
            public TextView textViewRate;
            public ImageView imgPoster;


        }

    }

您的活动将EditText Listener设置为此..！

editText.addTextChangedListener(new TextWatcher() {
                @Override
                public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

                }

                @Override
                public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

                }

                @Override
                public void afterTextChanged(Editable editable) {
                     adapter.getFilter().filter(charSequence.toString());
                }
            });

我希望它对你有帮助..！

答案 1 :(得分：0)

在搜索addTextChangedListener()上实施EditText，随着文字更改filter您的列表数据，并使用过滤后的数据更新MovieAdapter。

检查this帖子，了解如何更新自定义列表适配器

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