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J'ai essayé d'ajouter eventactivity sur onclicklistener de l'élément de calendrier dans l'élément de calendrier mais j'obtiens une exception de pointeur null.comment ajouter un événement sur l'élément de calendrier dans android
principal Activity.java
public class MainActivity extends Activity {
public GregorianCalendar month, itemmonth;// calendar instances.
public CalendarAdapter adapter;// adapter instance
public Handler handler;// for grabbing some event values for showing the dot
// marker.
public ArrayList<String> items; // container to store calendar items which
// needs showing the event marker
ArrayList<String> event;
LinearLayout rLayout;
ArrayList<String> date;
ArrayList<String> desc;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Locale.setDefault(Locale.US);
rLayout = (LinearLayout) findViewById(R.id.text);
month = (GregorianCalendar) GregorianCalendar.getInstance();
itemmonth = (GregorianCalendar) month.clone();
items = new ArrayList<String>();
adapter = new CalendarAdapter(this, month);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(adapter);
handler = new Handler();
handler.post(calendarUpdater);
TextView title = (TextView) findViewById(R.id.title);
title.setText(android.text.format.DateFormat.format("MMMM yyyy", month));
RelativeLayout previous = (RelativeLayout) findViewById(R.id.previous);
previous.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setPreviousMonth();
refreshCalendar();
}
});
RelativeLayout next = (RelativeLayout) findViewById(R.id.next);
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setNextMonth();
refreshCalendar();
}
});
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
// removing the previous view if added
if (((LinearLayout) rLayout).getChildCount() > 0) {
((LinearLayout) rLayout).removeAllViews();
}
desc = new ArrayList<String>();
date = new ArrayList<String>();
((CalendarAdapter) parent.getAdapter()).setSelected(v);
String selectedGridDate = CalendarAdapter.dayString
.get(position);
String[] separatedTime = selectedGridDate.split("-");
String gridvalueString = separatedTime[2].replaceFirst("^0*",
"");// taking last part of date. ie; 2 from 2012-12-02.
int gridvalue = Integer.parseInt(gridvalueString);
// navigate to next or previous month on clicking offdays.
if ((gridvalue > 10) && (position < 8)) {
setPreviousMonth();
refreshCalendar();
} else if ((gridvalue < 7) && (position > 28)) {
setNextMonth();
refreshCalendar();
}
((CalendarAdapter) parent.getAdapter()).setSelected(v);
for (int i = 0; i < Utility.startDates.size(); i++) {
if (Utility.startDates.get(i).equals(selectedGridDate)) {
desc.add(Utility.nameOfEvent.get(i));
}
}
if (desc.size() > 0) {
for (int i = 0; i < desc.size(); i++) {
TextView rowTextView = new TextView(MainActivity.this);
// set some properties of rowTextView or something
rowTextView.setText("Event:" + desc.get(i));
rowTextView.setTextColor(Color.BLACK);
// add the textview to the linearlayout
rLayout.addView(rowTextView);
}
}
desc = null;
}
});
}
protected void setNextMonth() {
if (month.get(GregorianCalendar.MONTH) == month
.getActualMaximum(GregorianCalendar.MONTH)) {
month.set((month.get(GregorianCalendar.YEAR) + 1),
month.getActualMinimum(GregorianCalendar.MONTH), 1);
} else {
month.set(GregorianCalendar.MONTH,
month.get(GregorianCalendar.MONTH) + 1);
}
}
protected void setPreviousMonth() {
if (month.get(GregorianCalendar.MONTH) == month
.getActualMinimum(GregorianCalendar.MONTH)) {
month.set((month.get(GregorianCalendar.YEAR) - 1),
month.getActualMaximum(GregorianCalendar.MONTH), 1);
} else {
month.set(GregorianCalendar.MONTH,
month.get(GregorianCalendar.MONTH) - 1);
}
}
protected void showToast(String string) {
Toast.makeText(this, string, Toast.LENGTH_SHORT).show();
}
public void refreshCalendar() {
TextView title = (TextView) findViewById(R.id.title);
adapter.refreshDays();
adapter.notifyDataSetChanged();
handler.post(calendarUpdater); // generate some calendar items
title.setText(android.text.format.DateFormat.format("MMMM yyyy", month));
}
public Runnable calendarUpdater = new Runnable() {
@Override
public void run() {
items.clear();
// Print dates of the current week
DateFormat df = new SimpleDateFormat("yyyy-MM-dd", Locale.US);
String itemvalue;
event = Utility.readCalendarEvent(MainActivity.this);
Log.d("=====Event====", event.toString());
Log.d("=====Date ARRAY====", Utility.startDates.toString());
for (int i = 0; i < Utility.startDates.size(); i++) {
itemvalue = df.format(itemmonth.getTime());
itemmonth.add(GregorianCalendar.DATE, 1);
items.add(Utility.startDates.get(i).toString());
}
adapter.setItems(items);
adapter.notifyDataSetChanged();
}
};
}
AddEventActivity.java
public class AddEventActivity extends AppCompatActivity implements View.OnClickListener,AdapterView.OnItemSelectedListener {
private Context mContext;
private String provinceIdSend;
Spinner sp_am,sp_hh,sp_mm,sp_amed,sp_province,sp_hhed,sp_mmed,sp_states;
private RelativeLayout main;
private String stateId,selectedProvince,cityIdSend,cityId,selectedState,stateIdSend;
private ArrayList<StatesBean> statesBeanArrayList;
private ArrayList<ProvinceBean> provinceBeanArrayList;
private int countclickedState = 0;
private TextView tv_province;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_event);
mContext = AddEventActivity.this;
new MakeRequestForGetStates().execute();
new MakeRequestForGetProvinces(stateId).execute();
sp_am = (Spinner) findViewById(R.id.sp_am);
sp_hh = (Spinner) findViewById(R.id.sp_hh);
sp_mm = (Spinner) findViewById(R.id.sp_mm);
sp_amed = (Spinner) findViewById(R.id.sp_amed);
sp_mmed = (Spinner) findViewById(R.id.sp_mmed);
sp_hhed = (Spinner) findViewById(R.id.sp_hhed);
sp_province = (Spinner) findViewById(R.id.sp_province);
sp_states= (Spinner) findViewById(R.id.sp_states);
tv_province= (TextView) findViewById(R.id.tv_province);
sp_am.setOnItemSelectedListener(this);
sp_hh.setOnItemSelectedListener(this);
sp_mm.setOnItemSelectedListener(this);
sp_amed.setOnItemSelectedListener(this);
sp_mmed.setOnItemSelectedListener(this);
sp_hhed.setOnItemSelectedListener(this);
sp_province.setOnItemSelectedListener(this);
sp_states.setOnItemSelectedListener(this);
List<String> list_hh = new ArrayList<String>();
list_hh.add("00");
list_hh.add("01");
list_hh.add("02");
list_hh.add("03");
list_hh.add("04");
list_hh.add("05");
list_hh.add("06");
list_hh.add("07");
list_hh.add("08");
list_hh.add("09");
list_hh.add("10");
list_hh.add("11");
list_hh.add("12");
list_hh.add("HH");
List<String> list_mm = new ArrayList<String>();
list_mm.add("00");
list_mm.add("01");
list_mm.add("02");
list_mm.add("03");
list_mm.add("04");
list_mm.add("05");
list_mm.add("06");
list_mm.add("07");
list_mm.add("08");
list_mm.add("09");
list_mm.add("10");
list_mm.add("11");
list_mm.add("12");
list_mm.add("13");
list_mm.add("14");
list_mm.add("15");
list_mm.add("16");
list_mm.add("17");
list_mm.add("18");
list_mm.add("19");
list_mm.add("20");
list_mm.add("21");
list_mm.add("22");
list_mm.add("23");
list_mm.add("24");
list_mm.add("25");
list_mm.add("26");
list_mm.add("27");
list_mm.add("28");
list_mm.add("29");
list_mm.add("30");
list_mm.add("31");
list_mm.add("32");
list_mm.add("33");
list_mm.add("34");
list_mm.add("35");
list_mm.add("36");
list_mm.add("37");
list_mm.add("38");
list_mm.add("39");
list_mm.add("40");
list_mm.add("41");
list_mm.add("42");
list_mm.add("43");
list_mm.add("44");
list_mm.add("45");
list_mm.add("46");
list_mm.add("47");
list_mm.add("48");
list_mm.add("49");
list_mm.add("50");
list_mm.add("51");
list_mm.add("52");
list_mm.add("53");
list_mm.add("54");
list_mm.add("55");
list_mm.add("56");
list_mm.add("57");
list_mm.add("58");
list_mm.add("59");
list_mm.add("MM");
List<String> list_am = new ArrayList<String>();
list_am.add("AM");
list_am.add("PM");
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>
(this, android.R.layout.simple_spinner_item,list_hh);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
ArrayAdapter<String> dataAdapter_mm = new ArrayAdapter<String>
(this, android.R.layout.simple_spinner_item,list_mm);
dataAdapter_mm.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
ArrayAdapter<String> dataAdapter_am = new ArrayAdapter<String>
(this, android.R.layout.simple_spinner_item,list_am);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sp_am.setAdapter(dataAdapter_am);
sp_hh.setAdapter(dataAdapter);
sp_hhed.setAdapter(dataAdapter);
sp_mm.setAdapter(dataAdapter_mm);
sp_amed.setAdapter(dataAdapter_am);
sp_mmed.setAdapter(dataAdapter_mm);
// Spinner item selection Listener
// Button click Listener
}
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
switch (parent.getId()) {
case R.id.sp_states:
String idToSendForCities = statesBeanArrayList.get(position).getStateID();
stateIdSend = idToSendForCities;
if (countclickedState == 1) {
new MakeRequestForGetProvinces(idToSendForCities).execute();
}
countclickedState=1;
selectedState = sp_states.getSelectedItem().toString();
break;
case R.id.sp_province:
cityIdSend = provinceBeanArrayList.get(position).getCityID();
selectedProvince = sp_province.getSelectedItem().toString();
break;
default:
break;
}
}
@Override
public void onClick(View v) {
}
private class MakeRequestForGetStates extends AsyncTask<String, Void, String> {
private String response;
private MakeServiceClass makeServiceClass = new MakeServiceClass();
@Override
protected void onPreExecute() {
}
@Override
protected String doInBackground(String... params) {
try {
HashMap<String, String> parms = new HashMap<String, String>();
response = makeServiceClass.makeServiceConnectionPost(Const.STATE_DETAILS_URL, parms);
Log.e("response states", response);
} catch (Exception ex) {
ex.printStackTrace();
}
return response;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(response);
if (response != null) {
try {
JSONObject mainObject = new JSONObject(response);
if (mainObject.has("Status")) {
String Status = mainObject.getString("Status");
if (Status.equalsIgnoreCase("200")) {
if (mainObject.has("Data")) {
JSONArray datArray = mainObject.getJSONArray("Data");
statesBeanArrayList = new ArrayList<>();
if (datArray.length() > 0) {
for (int i = 0; i < datArray.length(); i++) {
StatesBean statesBean = new StatesBean();
JSONObject internalDataObject = datArray.getJSONObject(i);
if (internalDataObject.has("StateID")) {
statesBean.setStateID(internalDataObject.getString("StateID"));
}
if (internalDataObject.has("Title")) {
statesBean.setTitle(internalDataObject.getString("Title"));
}
statesBeanArrayList.add(statesBean);
}
setStatesSpinnerdata();
} else {
showMessage("No occupations found for your profile.");
}
}
} else {
showMessage("Server error, Please try again");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
private class MakeRequestForGetProvinces extends AsyncTask<String, Void, String> {
private String response, stateIdNew;
private MakeServiceClass makeServiceClass = new MakeServiceClass();
MakeRequestForGetProvinces(String id) {
this.stateIdNew = id;
}
@Override
protected void onPreExecute() {
}
@Override
protected String doInBackground(String... params) {
try {
HashMap<String, String> parms = new HashMap<String, String>();
parms.put("StateID", stateIdNew);
response = makeServiceClass.makeServiceConnectionPost(Const.GETCITIES_FORSTATE_URL, parms);
Log.e("response cities", response);
} catch (Exception ex) {
ex.printStackTrace();
}
return response;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(response);
if (response != null) {
try {
JSONObject mainObject = new JSONObject(response);
if (mainObject.has("Status")) {
String Status = mainObject.getString("Status");
if (Status.equalsIgnoreCase("200")) {
if (mainObject.has("Data")) {
JSONArray datArray = mainObject.getJSONArray("Data");
provinceBeanArrayList = new ArrayList<>();
if (datArray.length() > 0) {
for (int i = 0; i < datArray.length(); i++) {
ProvinceBean provinceBean = new ProvinceBean();
JSONObject internalDataObject = datArray.getJSONObject(i);
if (internalDataObject.has("CityID")) {
provinceBean.setCityID(internalDataObject.getString("CityID"));
}
if (internalDataObject.has("Title")) {
provinceBean.setTitle(internalDataObject.getString("Title"));
}
provinceBeanArrayList.add(provinceBean);
}
setCitiesSpinnerdata();
} else {
showMessage("No province found for your profile.");
}
}
} else {
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
private void setStatesSpinnerdata() {
String stateName = "";
for (int i = 0; i < statesBeanArrayList.size(); i++) {
if (statesBeanArrayList.get(i).getStateID().equalsIgnoreCase(stateId)) {
stateName = statesBeanArrayList.get(i).getTitle();
break;
}
}
stateIdSend = stateId;
ArrayList<String> allData = new ArrayList<>();
if (!stateName.equalsIgnoreCase("")) {
allData.add(0, stateName);
selectedState = stateName;
} else {
allData.add(0, "Select State");
selectedState = "Select State";
}
for (int i = 1; i < statesBeanArrayList.size(); i++) {
allData.add(statesBeanArrayList.get(i).getTitle());
}
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(mContext, android.R.layout.simple_spinner_item, allData);
// Drop down followup_details_layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
sp_states.setAdapter(dataAdapter);
}
private void setCitiesSpinnerdata() {
String cityName = "";
for (int i = 0; i < provinceBeanArrayList.size(); i++) {
if (provinceBeanArrayList.get(i).getCityID().equalsIgnoreCase(cityId)) {
cityName = provinceBeanArrayList.get(i).getTitle();
break;
}
}
cityIdSend = cityId;
ArrayList<String> allData = new ArrayList<>();
if (!cityName.equalsIgnoreCase("")) {
allData.add(0, cityName);
selectedProvince = cityName;
} else {
allData.add(0, "Select Province");
selectedProvince = "Select Province";
}
for (int i = 1; i < provinceBeanArrayList.size(); i++) {
allData.add(provinceBeanArrayList.get(i).getTitle());
}
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(mContext, android.R.layout.simple_spinner_item, allData);
// Drop down followup_details_layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
sp_province.setAdapter(dataAdapter);
}
private void showMessage(String message) {
Snackbar snackbar = Snackbar
.make(main, message, Snackbar.LENGTH_LONG);
View snackbarView = snackbar.getView();
snackbarView.setBackgroundColor(getResources().getColor(R.color.colorPrimaryDark));
snackbar.show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
Calendrier adapter.java
public class CalendarAdapter extends BaseAdapter {
private Context mContext;
Fragment fragment;
private java.util.Calendar month;
public GregorianCalendar pmonth; // calendar instance for previous month
/**
* calendar instance for previous month for getting complete view
*/
public GregorianCalendar pmonthmaxset;
private GregorianCalendar selectedDate;
int firstDay;
int maxWeeknumber;
int maxP;
int calMaxP;
int lastWeekDay;
int leftDays;
int mnthlength;
String itemvalue, curentDateString;
DateFormat df;
private ArrayList<String> items;
public static List<String> dayString;
private View previousView;
public CalendarAdapter(Context c, GregorianCalendar monthCalendar) {
CalendarAdapter.dayString = new ArrayList<String>();
Locale.setDefault(Locale.US);
month = monthCalendar;
selectedDate = (GregorianCalendar) monthCalendar.clone();
mContext = c;
month.set(GregorianCalendar.DAY_OF_MONTH, 1);
this.items = new ArrayList<String>();
df = new SimpleDateFormat("yyyy-MM-dd", Locale.US);
curentDateString = df.format(selectedDate.getTime());
refreshDays();
}
public void setItems(ArrayList<String> items) {
for (int i = 0; i != items.size(); i++) {
if (items.get(i).length() == 1) {
items.set(i, "0" + items.get(i));
}
}
this.items = items;
}
public int getCount() {
return dayString.size();
}
public Object getItem(int position) {
return dayString.get(position);
}
public long getItemId(int position) {
return 0;
}
// create a new view for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
TextView dayView;
final ViewHolder viewHolder; // view lookup cache stored in tag
if (convertView == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = LayoutInflater.from(mContext);
convertView = inflater.inflate(R.layout.calendar_item, parent, false);
viewHolder.date = (TextView) convertView.findViewById(R.id.date);
viewHolder.date_icon = (ImageView) convertView.findViewById(R.id.date_icon);
viewHolder.lay_cal_item = (LinearLayout) convertView.findViewById(R.id.lay_cal_item);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.lay_cal_item.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mContext.startActivity(new Intent(mContext, AddEventActivity.class));
}
});
dayView = (TextView) v.findViewById(R.id.date);
// separates daystring into parts.
String[] separatedTime = dayString.get(position).split("-");
// taking last part of date. ie; 2 from 2012-12-02
String gridvalue = separatedTime[2].replaceFirst("^0*", "");
// checking whether the day is in current month or not.
if ((Integer.parseInt(gridvalue) > 1) && (position < firstDay)) {
// setting offdays to white color.
dayView.setTextColor(Color.WHITE);
dayView.setClickable(false);
dayView.setFocusable(false);
} else if ((Integer.parseInt(gridvalue) < 7) && (position > 28)) {
dayView.setTextColor(Color.WHITE);
dayView.setClickable(false);
dayView.setFocusable(false);
} else {
// setting curent month's days in blue color.
dayView.setTextColor(Color.BLUE);
}
if (dayString.get(position).equals(curentDateString)) {
setSelected(v);
previousView = v;
} else {
v.setBackgroundResource(R.drawable.list_item_background);
}
dayView.setText(gridvalue);
// create date string for comparison
String date = dayString.get(position);
if (date.length() == 1) {
date = "0" + date;
}
String monthStr = "" + (month.get(GregorianCalendar.MONTH) + 1);
if (monthStr.length() == 1) {
monthStr = "0" + monthStr;
}
// show icon if date is not empty and it exists in the items array
ImageView iw = (ImageView) v.findViewById(R.id.date_icon);
if (date.length() > 0 && items != null && items.contains(date)) {
iw.setVisibility(View.VISIBLE);
} else {
iw.setVisibility(View.INVISIBLE);
}
return convertView;
}
class ViewHolder {
private TextView date;
private ImageView date_icon;
private LinearLayout lay_cal_item;
}
public View setSelected(View view) {
if (previousView != null) {
previousView.setBackgroundResource(R.drawable.list_item_background);
}
previousView = view;
view.setBackgroundResource(R.drawable.calendar_cel_selectl);
return view;
}
public void refreshDays() {
// clear items
items.clear();
dayString.clear();
Locale.setDefault(Locale.US);
pmonth = (GregorianCalendar) month.clone();
// month start day. ie; sun, mon, etc
firstDay = month.get(GregorianCalendar.DAY_OF_WEEK);
// finding number of weeks in current month.
maxWeeknumber = month.getActualMaximum(GregorianCalendar.WEEK_OF_MONTH);
// allocating maximum row number for the gridview.
mnthlength = maxWeeknumber * 7;
maxP = getMaxP(); // previous month maximum day 31,30....
calMaxP = maxP - (firstDay - 1);// calendar offday starting 24,25 ...
/**
* Calendar instance for getting a complete gridview including the three
* month's (previous,current,next) dates.
*/
pmonthmaxset = (GregorianCalendar) pmonth.clone();
/**
* setting the start date as previous month's required date.
*/
pmonthmaxset.set(GregorianCalendar.DAY_OF_MONTH, calMaxP + 1);
/**
* filling calendar gridview.
*/
for (int n = 0; n < mnthlength; n++) {
itemvalue = df.format(pmonthmaxset.getTime());
pmonthmaxset.add(GregorianCalendar.DATE, 1);
dayString.add(itemvalue);
}
}
private int getMaxP() {
int maxP;
if (month.get(GregorianCalendar.MONTH) == month
.getActualMinimum(GregorianCalendar.MONTH)) {
pmonth.set((month.get(GregorianCalendar.YEAR) - 1),
month.getActualMaximum(GregorianCalendar.MONTH), 1);
} else {
pmonth.set(GregorianCalendar.MONTH,
month.get(GregorianCalendar.MONTH) - 1);
}
maxP = pmonth.getActualMaximum(GregorianCalendar.DAY_OF_MONTH);
return maxP;
}
}
erreur: FATAL EXCEPTION: principal processus: com.cogneesol.mycalendar, PID: 18708 java.lang.NullPointerException: tentative d'invoquer la méthode virtuelle « android.view.View android.view.View .findViewById (int) » sur une référence d'objet nul
merci ... maintenant son ravi travail :) –