Android Open Source - kluster-android Search Grid Fragment

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License

The source code is released under:

Apache License

Java Source Code

package com.cs446.kluster.views.fragments;
// ww  w . ja v  a  2s. co  m
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import retrofit.Callback;
import retrofit.RestAdapter;
import retrofit.RetrofitError;
import retrofit.client.Response;
import android.app.Fragment;
import android.app.LoaderManager;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.GridView;

import com.cs446.kluster.R;
import com.cs446.kluster.data.SearchProvider;
import com.cs446.kluster.data.SearchStorageAdapter;
import com.cs446.kluster.models.Event;
import com.cs446.kluster.net.AuthKlusterRestAdapter;
import com.cs446.kluster.net.KlusterService;
import com.cs446.kluster.views.fragments.FilterDialogFragment.FilterListener;

public class SearchGridFragment extends Fragment implements LoaderManager.LoaderCallbacks<Cursor>, FilterListener {
  private EventGridAdapter mAdapter;
  private Map<String, String> mFilters;
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.searchgrid_layout, container, false);
    
    String[] cols = new String[] { "location" };
    int[]   views = new int[]   { R.id.eventgrid_txtTitle };
    
    mAdapter = new EventGridAdapter(getActivity(), R.layout.eventgridcell_layout, null, cols, views, 0);
    
    GridView gridView=(GridView)view.findViewById(android.R.id.list);
    gridView.setEmptyView(view.findViewById(android.R.id.empty));
    gridView.setAdapter(mAdapter);

        /* Start loader */  
        getLoaderManager().initLoader(0, null, this);   
        
        setHasOptionsMenu(true);
        getActivity().getActionBar().setTitle("Discover");
        
    return view;
  }
    
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    
    if (getActivity().getFragmentManager().getBackStackEntryCount() > 0) {
      getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
    }
    
    Bundle args = getArguments();
    Integer radius = 55000;
    
    RestAdapter restAdapter = new AuthKlusterRestAdapter()
    .build();
    
    KlusterService service = restAdapter.create(KlusterService.class);
    service.getEvents(args.getString("location"), Integer.toString(radius), new Callback<List<Event>>() {    
      @Override
      public void success(List<Event> events, Response response) {
        SearchStorageAdapter storage = new SearchStorageAdapter(getActivity().getContentResolver());
        for (Event item : events) {
          storage.insert(item);
        }
      }
      @Override
      public void failure(RetrofitError error) {
        //Log.e("Search", error.getResponse().getReason());
      }
    });
  }
  
  @Override
  public Loader<Cursor> onCreateLoader(int loaderID, Bundle bundle) {
    if (mFilters == null) {
      mFilters = new HashMap<String, String>();  
    }
    
    Set<String> keySet = mFilters.keySet();
    keySet.remove("location");
    List<String> selectionArgs = new ArrayList<String>();
    String selection = TextUtils.join(" = ? and ", keySet);
    
    for (String str : keySet) {
      selectionArgs.add(mFilters.get(str));
    }
    
    String[] argsArray = selectionArgs.toArray(new String[selectionArgs.size()]);
    
    return new CursorLoader(getActivity(), SearchProvider.CONTENT_URI, null, selection, argsArray, null);
  }
    
  @Override
  public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
    mAdapter.changeCursor(cursor);
  }
  
  @Override
  public void onLoaderReset(Loader<Cursor> loader) {
    mAdapter.changeCursor(null);
  }

  @Override
  public void userSetFilter(String filter, String value) {
    if (mFilters == null) {
      mFilters = new HashMap<String, String>();  
    }
    
    mFilters.put(filter, value);
  }

  @Override
  public void userReturned() {
    
  }
}

Java Source Code List

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