Java tutorial
/* * Companion for Band * Copyright (C) 2016 Adithya J * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/> */ package com.pimp.companionforband.fragments.cloud; import android.os.Bundle; import android.os.Environment; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.android.volley.AuthFailureError; import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley; import com.pimp.companionforband.R; import com.pimp.companionforband.activities.cloud.CloudConstants; import com.pimp.companionforband.activities.main.MainActivity; import com.pimp.companionforband.utils.UIUtils; import com.pimp.companionforband.utils.jsontocsv.parser.JsonFlattener; import com.pimp.companionforband.utils.jsontocsv.writer.CSVWriter; import org.json.JSONArray; import org.json.JSONObject; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; public class SummariesFragment extends Fragment { TextView statusTV; ListView summariesLV; ArrayAdapter<String> stringArrayAdapter; ArrayList<String> stringArrayList; @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_summaries, container, false); } @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); summariesLV = (ListView) view.findViewById(R.id.summaries_listview); statusTV = (TextView) view.findViewById(R.id.status_textview); stringArrayList = new ArrayList<>(); stringArrayAdapter = new ArrayAdapter<>(getContext(), R.layout.activities_list_item, R.id.list_item_textView, stringArrayList); summariesLV.setAdapter(stringArrayAdapter); RequestQueue queue = Volley.newRequestQueue(getContext()); JsonObjectRequest profileRequest = new JsonObjectRequest(Request.Method.GET, CloudConstants.BASE_URL + CloudConstants.Summaries_URL + "Daily?startTime=2015-01-01T16%3A04%3A49.8578590-07%3A00", null, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { statusTV.setText("CSV file can be found in CompanionForBand/Summaries\n"); Iterator<String> stringIterator = response.keys(); while (stringIterator.hasNext()) { try { String key = stringIterator.next(); JSONArray jsonArray = response.getJSONArray(key); String path = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "CompanionForBand" + File.separator + "Summaries"; File file = new File(path); file.mkdirs(); JsonFlattener parser = new JsonFlattener(); CSVWriter writer = new CSVWriter(); try { List<LinkedHashMap<String, String>> flatJson = parser .parseJson(jsonArray.toString()); writer.writeAsCSV(flatJson, path + File.separator + key + ".csv"); } catch (Exception e) { Log.e("SummariesParseJson", e.toString()); } for (int i = 0; i < jsonArray.length(); i++) { JSONObject activity = jsonArray.getJSONObject(i); Iterator<String> iterator = activity.keys(); String str = ""; while (iterator.hasNext()) { key = iterator.next(); str = str + UIUtils.splitCamelCase(key) + " : " + activity.get(key).toString() + "\n"; } stringArrayAdapter.add(str); } } catch (Exception e) { Log.e("Summaries", e.toString()); } } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Toast.makeText(getActivity(), error.toString(), Toast.LENGTH_LONG).show(); } }) { @Override public Map<String, String> getHeaders() throws AuthFailureError { HashMap<String, String> headers = new HashMap<>(); headers.put("Authorization", "Bearer " + MainActivity.sharedPreferences.getString("access_token", "hi")); return headers; } }; queue.add(profileRequest); } }