com.commonsware.android.ion.QuestionsFragment.java Source code

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Here is the source code for com.commonsware.android.ion.QuestionsFragment.java

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/***
  Copyright (c) 2013-2014 CommonsWare, LLC
  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.
      
  From _The Busy Coder's Guide to Android Development_
https://commonsware.com/Android
 */

package com.commonsware.android.ion;

import android.app.ListFragment;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import com.google.gson.JsonArray;
import com.google.gson.JsonObject;
import com.koushikdutta.async.future.FutureCallback;
import com.koushikdutta.ion.Ion;
import de.greenrobot.event.EventBus;

public class QuestionsFragment extends ListFragment implements FutureCallback<JsonObject> {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View result = super.onCreateView(inflater, container, savedInstanceState);

        setRetainInstance(true);

        Ion.with(getActivity())
                .load("https://api.stackexchange.com/2.1/questions?"
                        + "order=desc&sort=creation&site=stackoverflow&" + "tagged=android")
                .asJsonObject().setCallback(this);

        return (result);
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        JsonObject item = ((ItemsAdapter) getListAdapter()).getItem(position);

        EventBus.getDefault().post(new QuestionClickedEvent(item));
    }

    @Override
    public void onCompleted(Exception e, JsonObject json) {
        if (e != null) {
            Toast.makeText(getActivity(), e.getMessage(), Toast.LENGTH_LONG).show();
            Log.e(getClass().getSimpleName(), "Exception from Retrofit request to StackOverflow", e);
        }

        if (json != null) {
            JsonArray items = json.getAsJsonArray("items");
            ArrayList<JsonObject> normalized = new ArrayList<JsonObject>();

            for (int i = 0; i < items.size(); i++) {
                normalized.add(items.get(i).getAsJsonObject());
            }

            setListAdapter(new ItemsAdapter(normalized));
        }
    }

    class ItemsAdapter extends ArrayAdapter<JsonObject> {
        int size;

        ItemsAdapter(List<JsonObject> items) {
            super(getActivity(), R.layout.row, R.id.title, items);

            size = getActivity().getResources().getDimensionPixelSize(R.dimen.icon);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View row = super.getView(position, convertView, parent);
            JsonObject item = getItem(position);
            ImageView icon = (ImageView) row.findViewById(R.id.icon);

            Ion.with(icon).placeholder(R.drawable.owner_placeholder).resize(size, size).centerCrop()
                    .error(R.drawable.owner_error)
                    .load(item.getAsJsonObject("owner").get("profile_image").getAsString());

            TextView title = (TextView) row.findViewById(R.id.title);

            title.setText(Html.fromHtml(item.get("title").getAsString()));

            return (row);
        }
    }
}