Java tutorial
/* * 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 pedromendes.tempodeespera; import android.Manifest; import android.app.ProgressDialog; import android.content.Intent; import android.content.pm.PackageManager; import android.graphics.Typeface; import android.net.Uri; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.text.Html; import android.text.method.LinkMovementMethod; import android.util.JsonReader; import android.util.JsonToken; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; import java.io.BufferedInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import pedromendes.tempodeespera.adapters.EmergencyListAdapter; import pedromendes.tempodeespera.data.Emergency; import pedromendes.tempodeespera.data.EmergencyQueue; public class HospitalDetailActivity extends AppCompatActivity { private Logger logger = Logger.getLogger(HospitalDetailActivity.class.getName()); private static final String HOSPITAL_DETAIL_URL = "http://tempos.min-saude.pt/api.php/standbyTime/"; ProgressDialog dialog; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_hospital_detail); Typeface font = Typeface.createFromAsset(getAssets(), "fontawesome-webfont.ttf"); Long hospitalId = getIntent().getExtras().getLong("HOSPITAL_ID"); String hospitalName = getIntent().getExtras().getString("HOSPITAL_NAME"); String hospitalDescription = getIntent().getExtras().getString("HOSPITAL_DESCRIPTION"); String hospitalAddress = getIntent().getExtras().getString("HOSPITAL_ADDRESS"); final String hospitalPhone = getIntent().getExtras().getString("HOSPITAL_PHONE"); String hospitalEmail = getIntent().getExtras().getString("HOSPITAL_EMAIL"); String latitude = getIntent().getExtras().getString("HOSPITAL_LAT"); String longitude = getIntent().getExtras().getString("HOSPITAL_LONG"); TextView hospitalNameView = (TextView) findViewById(R.id.hospitalName); hospitalNameView.setText(hospitalName); if (hospitalAddress != null && !hospitalAddress.isEmpty()) { TextView hospitalAddressView = (TextView) findViewById(R.id.hospitalAddress); hospitalAddressView.setText(Html.fromHtml(hospitalAddress + "<br/>" + "<a href=\"geo:" + latitude + "," + longitude + "\">" + "Ver mapa" + "</a>")); hospitalAddressView.setMovementMethod(LinkMovementMethod.getInstance()); } if (hospitalPhone != null && !hospitalPhone.isEmpty()) { Button hospitalPhoneView = (Button) findViewById(R.id.hospitalPhone); hospitalPhoneView.append(" " + hospitalPhone); hospitalPhoneView.setTypeface(font); hospitalPhoneView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { Intent callIntent = new Intent(Intent.ACTION_CALL); callIntent.setData(Uri.parse("tel:" + hospitalPhone)); callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) { return; } startActivity(callIntent); } }); } dialog = new ProgressDialog(this); dialog.setMessage("A carregar..."); dialog.show(); new RequestHospitalDetailTask().execute(hospitalId.toString()); } class RequestHospitalDetailTask extends AsyncTask<String, String, List<Emergency>> { @Override protected List<Emergency> doInBackground(String... hospitalId) { HttpURLConnection urlConnection = null; List<Emergency> hospitalEmergencyDetail = null; try { URL url = new URL(HOSPITAL_DETAIL_URL.concat(hospitalId[0])); urlConnection = (HttpURLConnection) url.openConnection(); InputStream in = new BufferedInputStream(urlConnection.getInputStream()); hospitalEmergencyDetail = readJsonStream(in); } catch (Exception e) { logger.log(Level.ALL, e.getMessage()); } finally { urlConnection.disconnect(); } return hospitalEmergencyDetail; } @Override protected void onPostExecute(List<Emergency> result) { dialog.hide(); super.onPostExecute(result); if (result == null) { TextView noAvailableData = (TextView) findViewById(R.id.no_available_data); noAvailableData.setText("Esta instituio no partilha tempos da urgncia."); return; } ArrayAdapter emergencyListAdapter = new EmergencyListAdapter(HospitalDetailActivity.this, R.layout.emergency_list_item, result); ListView emergenciesListView = (ListView) findViewById(R.id.emergencies_list); emergenciesListView.setAdapter(emergencyListAdapter); } } public List<Emergency> readJsonStream(InputStream in) throws IOException { JsonReader reader = new JsonReader(new InputStreamReader(in, "UTF-8")); try { return readHospitalDetailGetResponse(reader); } finally { reader.close(); } } private List<Emergency> readHospitalDetailGetResponse(JsonReader reader) throws IOException { List<Emergency> result = null; reader.beginObject(); while (reader.hasNext()) { result = readResult(reader); } reader.endObject(); return result; } public List<Emergency> readResult(JsonReader reader) throws IOException { List<Emergency> result = new ArrayList<Emergency>(); String name = reader.nextName(); if (name.equals("Result")) { reader.beginArray(); while (reader.hasNext()) { reader.beginObject(); Emergency hospitalEmergencyDetail = new Emergency(); readEmergency(reader, hospitalEmergencyDetail); reader.endObject(); result.add(hospitalEmergencyDetail); } reader.endArray(); } return result; } private void readEmergency(JsonReader reader, Emergency hospitalEmergencyDetail) throws IOException { while (reader.hasNext()) { String fieldDame = reader.nextName(); if (fieldDame.equals("Emergency")) { reader.beginObject(); reader.nextName(); reader.nextString(); reader.nextName(); hospitalEmergencyDetail.setDescription(reader.nextString()); reader.endObject(); } else if (fieldDame.equals("Queue") && reader.peek() != JsonToken.NULL) { reader.beginObject(); reader.nextName(); reader.nextString(); reader.nextName(); hospitalEmergencyDetail.setName(reader.nextString()); reader.endObject(); } else if (fieldDame.equals("Red")) { reader.beginObject(); fillQueue(reader, hospitalEmergencyDetail.getRedQueue()); reader.endObject(); } else if (fieldDame.equals("Orange")) { reader.beginObject(); fillQueue(reader, hospitalEmergencyDetail.getOrangeQueue()); reader.endObject(); } else if (fieldDame.equals("Yellow")) { reader.beginObject(); fillQueue(reader, hospitalEmergencyDetail.getYellowQueue()); reader.endObject(); } else if (fieldDame.equals("Green")) { reader.beginObject(); fillQueue(reader, hospitalEmergencyDetail.getGreenQueue()); reader.endObject(); } else if (fieldDame.equals("Blue")) { reader.beginObject(); fillQueue(reader, hospitalEmergencyDetail.getBlueQueue()); reader.endObject(); } else if (fieldDame.equals("LastUpdate")) { hospitalEmergencyDetail.setLastUpdate(reader.nextString()); } else { reader.skipValue(); } } } public void fillQueue(JsonReader reader, EmergencyQueue queue) throws IOException { reader.nextName(); int time = reader.nextInt(); reader.nextName(); int length = reader.nextInt(); queue.setTime(time); queue.setLength(length); } }