Android Open Source - hello-srch2-android-sdk Search Results Adapter

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This is free and unencumbered software released into the public domain. Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a co...

Java Source Code

package com.srch2.android.demo.sqlite;
//from  w w  w .  j  a  v a 2s  .  com
import android.content.Context;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.srch2.android.sdk.Indexable;
import com.srch2.android.sdk.SearchResultsListener;

import org.json.JSONException;
import org.json.JSONObject;

import java.net.HttpURLConnection;
import java.util.ArrayList;
import java.util.HashMap;

public class SearchResultsAdapter extends BaseAdapter implements SearchResultsListener {

    private static class ViewHolder {
        public TextView mTitleTextView;
        public TextView mAuthorTextView;
        public TextView mYearTextView;

        public ViewHolder(TextView titleTextView, TextView authorTextView,
                            TextView yearTextView) {
            mTitleTextView = titleTextView;
            mAuthorTextView = authorTextView;
            mYearTextView = yearTextView;
        }
    }

    private ArrayList<BookSearchResult> mSearchResults;
    private LayoutInflater mLayoutInflater;

    public SearchResultsAdapter(Context context) {
        mLayoutInflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        mSearchResults = new ArrayList<BookSearchResult>();
    }

    public void clearDisplayedSearchResults() {
        mSearchResults.clear();
        notifyDataSetChanged();
    }

    public void updateDisplayedSearchResults(
            ArrayList<BookSearchResult> newSearchResults) {
        // Swap out the data set of this adapter with the new set of search results
        // and invalidate the list view this adapter is backing with these new
        // search results.
        mSearchResults.clear();
        mSearchResults.addAll(newSearchResults);
        notifyDataSetChanged();
    }

    @Override
    public int getCount() {
        return mSearchResults == null ? 0 : mSearchResults.size();
    }

    @Override
    public BookSearchResult getItem(int position) {
        return mSearchResults == null ? null : mSearchResults.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        BookSearchResult searchResult = mSearchResults.get(position);
        if (searchResult == null) {
            View view = new View(parent.getContext());
            view.setVisibility(View.GONE);
            return view;
        } else {
            ViewHolder viewHolder;
            if (convertView == null) {
                convertView = mLayoutInflater.inflate(
                        R.layout.listview_search_result_row, parent, false);
                TextView titleTextView = (TextView) convertView
                        .findViewById(R.id.tv_title_search_result_row);
                TextView authorTextView = (TextView) convertView
                        .findViewById(R.id.tv_author_search_result_row);
                TextView yearTextView = (TextView) convertView
                        .findViewById(R.id.tv_year_search_result_row);
                viewHolder = new ViewHolder(titleTextView, authorTextView,
                                                 yearTextView);
                convertView.setTag(viewHolder);
            } else {
                viewHolder = (ViewHolder) convertView.getTag();
            }
            // Using Html.fromHtml since the highlighted pre and post script was
            // set using html code.
            viewHolder.mTitleTextView.setText(Html.fromHtml(searchResult.getTitle()));
            viewHolder.mAuthorTextView.setText(Html.fromHtml(searchResult.getAuthor()));
            viewHolder.mYearTextView.setText(String.valueOf(searchResult.getYear()));
            return convertView;
        }
    }

    @Override
    public void onNewSearchResults(int HTTPResponseCode, String JSONresponse,
                                   HashMap<String, ArrayList<JSONObject>> resultMap) {
        if (HTTPResponseCode == HttpURLConnection.HTTP_OK) {
            ArrayList<BookSearchResult> newResults = new ArrayList<BookSearchResult>();

            // First retrieve the set of search results corresponding to the movie index.
            ArrayList<JSONObject> movieResults =
                    resultMap.get(DatabaseHelper.TABLE_NAME);

            if (movieResults != null && movieResults.size() > 0) {
                // If there are records in the set, iterate through them...
                for (JSONObject jsonObject : movieResults) {
                    BookSearchResult searchResult = null;
                    try {
                        // Each jsonObject will contain at least the original record as a JSONObject
                        // with its keys as the field names of the schema defined for this index.
                        JSONObject originalRecord =
                                jsonObject.getJSONObject(Indexable.SEARCH_RESULT_JSON_KEY_RECORD);
                        // Each jsonObject can also contain the set of highlighted fields, since the
                        // "field" title was set to be highlighted, pull highlightedFields out of each
                        // jsonObject as well.
                        JSONObject highlightedFields =
                                jsonObject.getJSONObject(Indexable.SEARCH_RESULT_JSON_KEY_HIGHLIGHTED);
                        // Instantiate a data element for the adapter, passing in the title as it
                        // was formatted by the highlighter and the genre and year from the original
                        // record.
                        searchResult = new BookSearchResult(
                                highlightedFields
                                        .getString(DatabaseHelper.COLUMN_TITLE),
                                highlightedFields
                                        .getString(DatabaseHelper.COLUMN_AUTHOR),
                                originalRecord
                                        .getInt(DatabaseHelper.COLUMN_YEAR));
                    } catch (JSONException oops) {
                        continue;
                    }

                    if (searchResult != null) {
                        newResults.add(searchResult);
                    }
                }
            }

            if (newResults.size() > 0) {
                updateDisplayedSearchResults(newResults);
            } else {
                clearDisplayedSearchResults();
            }
        }
    }

}

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