Java tutorial
/* 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 edu.pdx.its.portal.routelandia; import java.lang.reflect.Field; import java.util.ArrayList; import java.util.Calendar; import java.util.Iterator; import android.annotation.SuppressLint; import android.app.Activity; import android.app.ProgressDialog; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.NavUtils; import android.support.v7.app.ActionBarActivity; import android.util.Log; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.Button; import android.widget.NumberPicker; import android.widget.Spinner; import android.widget.TextView; import android.widget.TimePicker; import android.widget.Toast; import com.google.android.gms.maps.model.LatLng; import edu.pdx.its.portal.routelandia.entities.APIException; import edu.pdx.its.portal.routelandia.entities.APIResultWrapper; import edu.pdx.its.portal.routelandia.entities.TrafficStat; public class DatePickUp extends ActionBarActivity implements AsyncResult { private static final String TAG = "Activity: DatePickup"; private TimePicker thisTimePicker; private Button btnDepartureDate; private int hour; private int minute; private int am_pm; protected String dayofweek; private Spinner weekDaySpinner; public String weekDay; protected LatLng startPoint; protected LatLng endPoint; protected String departureTime; protected ArrayList<TrafficStat> trafficStatList; private int TIME_PICKER_INTERVAL = 15; private ProgressDialog loadingDialog; private int activeAsyncs = 0; /** * Perform initialization of all fragments and loaders. * * @param savedInstanceState Bundle from Google SDK */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_date_pick_up); getSupportActionBar().setDisplayHomeAsUpEnabled(true); setTimePickerInterval((TimePicker) findViewById(R.id.timePicker)); setCurrentTimeOnView(); addListenerOnWeekDaySpinnerSelection(); addListenerOnTime(); if (getIntent().getExtras() != null) { startPoint = new LatLng(getIntent().getExtras().getDouble("lat of first point"), getIntent().getExtras().getDouble("lng of first point")); endPoint = new LatLng(getIntent().getExtras().getDouble("lat of second point"), getIntent().getExtras().getDouble("lng of second point")); } addListenerOnButton(); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { // Respond to the action bar's Up/Home button case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } /** * change the minute interval to quarter* * @param timePicker : timepicker obk in the view */ @SuppressLint("NewApi") private void setTimePickerInterval(TimePicker timePicker) { try { Class<?> classForid = Class.forName("com.android.internal.R$id"); Field field = classForid.getField("minute"); NumberPicker minutePicker = (NumberPicker) timePicker.findViewById(field.getInt(null)); minutePicker.setMinValue(0); minutePicker.setMaxValue(7); ArrayList<String> displayedValues = new ArrayList<>(); for (int i = 0; i < 60; i += TIME_PICKER_INTERVAL) { displayedValues.add(String.format("%02d", i)); } for (int i = 0; i < 60; i += TIME_PICKER_INTERVAL) { displayedValues.add(String.format("%02d", i)); } minutePicker.setDisplayedValues(displayedValues.toArray(new String[0])); } catch (Exception e) { e.printStackTrace(); } } /** * Handle user choose day of the week from the spinner* */ private void addListenerOnWeekDaySpinnerSelection() { weekDaySpinner = (Spinner) findViewById(R.id.spinner); DayPickSelectedListener dayPickSelectedListener = new DayPickSelectedListener(); weekDaySpinner.setOnItemSelectedListener(dayPickSelectedListener); } /** * Handle user choose time of the day* */ private void addListenerOnTime() { thisTimePicker = (TimePicker) findViewById(R.id.timePicker); TimePickSelectedListener timePickSelectedListener = new TimePickSelectedListener(); thisTimePicker.setOnTimeChangedListener(timePickSelectedListener); } /** * Display the current time* */ public void setCurrentTimeOnView() { thisTimePicker = (TimePicker) findViewById(R.id.timePicker); weekDaySpinner = (Spinner) findViewById(R.id.spinner); final Calendar c = Calendar.getInstance(); hour = c.get(Calendar.HOUR_OF_DAY); minute = c.get(Calendar.MINUTE); am_pm = c.get(Calendar.AM_PM); dayofweek = getDayOfWeekInStr(c.get(Calendar.DAY_OF_WEEK)); departureTime = (new StringBuilder().append(hour).append(":").append(minute)).toString(); thisTimePicker.setCurrentHour(hour); thisTimePicker.setCurrentMinute(minute); // We have to do the -1 because DAY_OF_WEEK is 1-7, instead of 0-6. weekDaySpinner.setSelection(c.get(Calendar.DAY_OF_WEEK) - 1); } /** * * * @param value: number associate with date of the week * @return day of the week */ public String getDayOfWeekInStr(int value) { String day = "Sunday"; switch (value) { case 0: day = "Sunday"; break; case 1: day = "Monday"; break; case 2: day = "Tuesday"; break; case 3: day = "Wednesday"; break; case 4: day = "Thursday"; break; case 5: day = "Friday"; break; case 6: day = "Saturday"; break; } return day; } /** * Method handle when user click on get statistics button* */ public void addListenerOnButton() { btnDepartureDate = (Button) findViewById(R.id.btnDepartureDate); btnDepartureDate.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { loadingDialog = new ProgressDialog(DatePickUp.this); loadingDialog.setMessage("Fetching statistics from server..."); loadingDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); loadingDialog.setCancelable(false); loadingDialog.show(); TrafficStat.getStatsResultListFor(startPoint, endPoint, departureTime, weekDay, DatePickUp.this); /* } catch (APIException e) { // TODO: RESTART ACTIVITY AFTER TELLING USER THAT THEY NEED TO DO SOMETHING!! // (Did they pick bad points? Going to have to read the e.getResultWrapper().getParsedResponse() JSON to see...) int response = e.getResultWrapper().getHttpStatus(); if(response == 400) { new ErrorPopup("Error", "Please select two points along the same color highway segment.").givePopup(DatePickUp.this).show(); ((Activity)v.getContext()).onBackPressed(); } else if(response == 404 || response == 412){ new ErrorPopup("Error", "Could not complete request: \n\n" + e.getMessage()).givePopup(DatePickUp.this).show(); } else if(response >= 500 && response < 600){ new ErrorPopup("Server Error", "There was an error on the server. Please try again later.").givePopup(DatePickUp.this).show(); } else{ new ErrorPopup("Error", "Could not complete request: \n\n" + e.getMessage()).givePopup(DatePickUp.this).show(); } } */ } }); } //region AsyncTask results @Override public void onApiResult(APIResultWrapper resWrap) { trafficStatList = resWrap.getListResponse(); loadingDialog.dismiss(); activeAsyncs--; if (resWrap.getExceptions().size() > 0) { String errStr = ""; Iterator eItr = resWrap.getExceptions().iterator(); while (eItr.hasNext()) { // TODO: Handle specific exception differently? Exception tEx = (Exception) eItr.next(); errStr += tEx.getMessage() + "\n\n"; } new ErrorPopup("Error fetching statistics...", errStr).givePopup(this).show(); } else { if (trafficStatList == null) { // This actually shouldn't happen because if no results returned an error SHOULD be, // and so the above block should have caught it... But we like to cover everything. Log.e(TAG, "No results returned from statistics query."); new ErrorPopup("Error", "Server returned no results").givePopup(this).show(); } else { Intent intent = new Intent(getApplicationContext(), ListStat.class); intent.putParcelableArrayListExtra("travel info", trafficStatList); startActivity(intent); } } } @Override public void addActiveAsync(AsyncTask t) { activeAsyncs++; } //endregion protected class DayPickSelectedListener implements AdapterView.OnItemSelectedListener { /** * * * @param parent: parent view * @param view: current view * @param pos: position day in the spinner * @param id */ public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) { Toast.makeText(parent.getContext(), "Departure day: " + parent.getItemAtPosition(pos).toString(), Toast.LENGTH_SHORT).show(); String s = parent.getItemAtPosition(pos).toString(); if (s == null) { weekDay = dayofweek; } else { weekDay = s; } } /** * Callback method to be invoked when the selection disappears from this * view. The selection can disappear for instance when touch is activated * or when the adapter becomes empty. * * @param parent The AdapterView that now contains no selected item. */ @Override public void onNothingSelected(AdapterView<?> parent) { } } private class TimePickSelectedListener implements TimePicker.OnTimeChangedListener { /** * Update the string representing the time we want stats for every time the user * changes the spinner. * * @param timePicker: timepicker obk in the view * @param hourOfDay The current hour. * @param minute The current minute. */ @Override public void onTimeChanged(TimePicker timePicker, int hourOfDay, int minute) { departureTime = new StringBuilder().append(hourOfDay).append(":").append(minute).toString(); } } }