Android Open Source - ChicagoWaterWalk-Android All Routes Fragment

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2014 The Illinois-Indiana Sea Grant
 *//from  w  w w. jav  a 2 s. c o  m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.iisgcp.waterwalk.fragment;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;

import org.iisgcp.waterwalk.R;
import org.iisgcp.waterwalk.activity.PointOfInterestDetailActivity;
import org.iisgcp.waterwalk.adapter.AllRoutesAdapter;
import org.iisgcp.waterwalk.adapter.RowItem;
import org.iisgcp.waterwalk.utils.Constants;
import org.iisgcp.waterwalk.utils.ImageFetcher;
import org.iisgcp.waterwalk.utils.Utils;
import org.iisgcp.waterwalk.utils.ImageCache.ImageCacheParams;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;

public class AllRoutesFragment extends Fragment {
  
    private static final String IMAGE_CACHE_DIR = "all_route_thumbs";
  
    private AllRoutesAdapter mAdapter;
    private ImageFetcher mImageFetcher;
    
  private ExpandableListView mList;
  
    /**
     * Fragment initialization.  We way we want to be retained and
     * start our thread.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        // Tell the framework to try to keep this fragment around
        // during a configuration change.
        setRetainInstance(true);
        setHasOptionsMenu(true);
        
        ImageCacheParams cacheParams = new ImageCacheParams(getActivity(), IMAGE_CACHE_DIR);
        cacheParams.setMemCacheSizePercent(0.25f); // Set memory cache to 25% of app memory

        // The ImageFetcher takes care of loading images into our ImageView children asynchronously
        mImageFetcher = new ImageFetcher(getActivity(), Utils.getLargestGridDimension(getActivity()));
        mImageFetcher.setLoadingImage(R.drawable.empty_photo);
        mImageFetcher.addImageCache(getActivity().getSupportFragmentManager(), cacheParams);
    }
  
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
      super.onCreateView(inflater, container, savedInstanceState);
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_all_routes, container, false);
        mList = (ExpandableListView) view.findViewById(android.R.id.list);
        return view;
    }
    
    public void onActivityCreated (Bundle savedInstanceState) {
      super.onActivityCreated(savedInstanceState);
        
        mAdapter = new AllRoutesAdapter(getActivity(), mImageFetcher, getListHeaders());         
        
        mList.setAdapter(mAdapter);
        mList.setFastScrollEnabled(true);
        mList.setOnChildClickListener(new OnChildClickListener() {

      @Override
      public boolean onChildClick(ExpandableListView parent, View v,
          int groupPosition, int childPosition, long id) {
        RowItem rowItem = (RowItem) mAdapter.getChild(groupPosition, childPosition);
        
          Intent intent = new Intent(AllRoutesFragment.this.getActivity(), PointOfInterestDetailActivity.class);
          intent.putExtra(Constants.INTENT_TITLE, rowItem.getTitle());
          intent.putExtra(Constants.INTENT_RES_ID, rowItem.getResId());
          intent.putExtra(Constants.INTENT_DRAWER_POSITION, 1);
          AllRoutesFragment.this.startActivity(intent);
        return false;
      }
          
        });
        
        ViewTreeObserver vto = mList.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
          @SuppressLint("NewApi")
          @Override
          public void onGlobalLayout() {
            if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
              mList.setIndicatorBounds(mList.getRight()- 70, mList.getWidth());
            } else {
              mList.setIndicatorBoundsRelative(mList.getRight()- 70, mList.getWidth());
            }
          }
        });
    }

    @SuppressLint("NewApi")
  @Override
    public void onResume() {
        super.onResume();
        mImageFetcher.setExitTasksEarly(false);
        mAdapter.notifyDataSetChanged();
    }

    @Override
    public void onPause() {
        super.onPause();
        mImageFetcher.setPauseWork(false);
        mImageFetcher.setExitTasksEarly(true);
        mImageFetcher.flushCache();
    }
    
    @Override
    public void onDestroy() {
        super.onDestroy();
        mImageFetcher.closeCache();
    }
    
    private HashMap<RowItem, List<RowItem>> getListHeaders() {
      LinkedHashMap<RowItem, List<RowItem>> rowItems = null;
        
        TypedArray routes = getResources().obtainTypedArray(R.array.routes);
        
        List<Integer> imageIds = new ArrayList<Integer>();
      
        rowItems = new LinkedHashMap<RowItem, List<RowItem>>();
        
        for (int i = 0; i < routes.length(); i++) {
          TypedArray route = getResources().obtainTypedArray(routes.getResourceId(i, -1));
          
          String title = getString(route.getResourceId(0, -1));
          int imageId = route.getResourceId(1, -1);

          imageIds.add(imageId);
          
          rowItems.put(buildRow(imageId, title, routes.getResourceId(i, -1)), getListChildren(route.getResourceId(5, -1)));
          
          route.recycle();
        }
        
        routes.recycle();
        
        return rowItems;
    }
    
    private List<RowItem> getListChildren(int resId) {
      List<RowItem> rowItems = null;

      TypedArray pois = getResources().obtainTypedArray(resId);

        List<Integer> imageIds = new ArrayList<Integer>();
      
      rowItems = new ArrayList<RowItem>();

      for (int i = 0; i < pois.length(); i++) {
        TypedArray poi = getResources().obtainTypedArray(pois.getResourceId(i, -1));

        String title = getString(poi.getResourceId(0, -1));
        int imageId = poi.getResourceId(1, -1);

        imageIds.add(imageId);
        
        rowItems.add(buildRow(imageId, title, pois.getResourceId(i, -1)));
        poi.recycle();
      }

      pois.recycle();
      
      return rowItems;
    }
    
    private RowItem buildRow(int imageId, String title, int resId) {
      RowItem rowItem = new RowItem();
      rowItem.setImageId(imageId);
      rowItem.setTitle(title);
      rowItem.setResId(resId);
      
      return rowItem;
    }
}

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