Develop Reference

How to speed up data loading into recyclerview?

I'm in a dire situation of finding a solution for speeding up loading data into the RecyclerView. Data load from the server database and populate the row. Each row has a few EditTexts where user enters some values. Within the OnBindViewHolder, each value entered by the user is captured using a text watcher, and then totals are calculated and displayed real-time in the footer of the parent view.(outside the RecyclerView) Also, inside the OnBindViewHolder, a method is called to update a table in the DB, with the values just entered and captured.
So, basically, when each row gets bound, both the DB and the UI get updated. When the data load is huge, loading of the recyclerView is really slow. What I have tried are moving the DB update to a separate thread, using async task to update the DB. But nothing worked. What should I do here?
Adapter's OnBindViewHolder code is displayed below.
public void onBindViewHolder(final MyViewHolder holder, #SuppressLint("RecyclerView") final int position, List<Object> payload) {
//onBindViewHolder(holder,position);
holder.ref = position;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("dd-MM-yyyy");
onBind = true;
// data passed from getAllData method aka all from TempInvoice
SalesInvoiceModel siModel = salesInvoice.get(position);
holder.code.setText(siModel.getCode());
holder.product.setText(siModel.getProduct());
holder.batchNum.setText(siModel.getBatchNumber());
try {
Date date = simpleDateFormat.parse(siModel.getExpiryDate());
holder.expiry.setText(date.toString());
} catch (Exception ex) {
holder.expiry.setText("Error");
}
holder.expiry.setText(siModel.getExpiryDate());
if (siModel.getDiscountRate() > 0) {
holder.unitprice.setText(siModel.getRetailPrice() + "");
} else {
holder.unitprice.setText(siModel.getUnitPrice() + "");
}
holder.stock.setText(siModel.getStock() + "");
holder.lineval.setText(siModel.getLineValue() + "");
if (payload == null || payload.size() == 0) {
holder.shelf.setText(siModel.getShelf() + "");
holder.request.setText(siModel.getRequest() + "");
holder.order.setText(siModel.getOrder() + "");
holder.free.setText(siModel.getFree() + "");
holder.discount.setText(siModel.getDiscountRate() + "");
} else {
for (Object editText : payload) {
//String val = (String)payload.get(0);
String val = (String) editText;
switch (val) {
case SHELF:
if (lostFocus) {
holder.shelf.setText(salesInvoice.get(position).getShelf() + "");
}
break;
case REQUEST:
if (lostFocus) {
holder.request.setText(salesInvoice.get(position).getRequest() + "");
}
break;
case ORDER:
if (lostFocus) {
holder.order.setText(salesInvoice.get(position).getOrder() + "");
}
break;
case FREE:
if (lostFocus) {
holder.free.setText(salesInvoice.get(position).getFree() + "");
}
break;
case DISCOUNT:
if (lostFocus) {
holder.discount.setText(salesInvoice.get(position).getDiscountRate() + "");
}
break;
case LINEVAL:
holder.lineval.setText(salesInvoice.get(position).getLineValue() + "");
break;
default:
onBindViewHolder(holder, position);
break;
}
}
}
//ADD TEXT WATCHERS
holder.shelf.setOnFocusChangeListener(new FocusChangeListener());
holder.shelf.addTextChangedListener(new GenericTextWatcher() {
#Override
public void afterTextChanged(String s) {
int pos = holder.ref;
if (!onBind) {
if (!s.equals("")) {
notifyItemChanged(pos, SHELF);
Log.d(TAG, "inside text change typed shelf_" + s);
salesInvoice.get(pos).setShelf(Integer.parseInt(s + ""));
} else {
salesInvoice.get(pos).setShelf(0);
}
lastUpdatedRow = pos;
}
}
});
holder.request.setOnFocusChangeListener(new FocusChangeListener());
holder.request.addTextChangedListener(new GenericTextWatcher() {
#Override
public void afterTextChanged(String s) {
boolean valHasChanged = false;
boolean freeHasChanged = false;
int pos = holder.ref;
if (!onBind) {
if (!(s.equals(""))) {
int val = Integer.parseInt((s));
int stock = salesInvoice.get(pos).getStock();
// if stock does not have the particular product
if (val > stock) {
val = stock;
valHasChanged = true;
}
salesInvoice.get(pos).setRequest(val);
if (!refresh) salesInvoice.get(pos).setOrder(val);
if (salesInvoice.get(pos).getFree() + salesInvoice.get(pos).getOrder() > salesInvoice.get(pos).getStock()) {
salesInvoice.get(pos).setFree(0);
freeHasChanged = true;
}
} else {
salesInvoice.get(pos).setRequest(0);
}
notifyItemChanged(pos, ORDER);
if (valHasChanged) {
notifyItemChanged(pos, REQUEST);
}
if (freeHasChanged) {
notifyItemChanged(pos, FREE);
}
lastUpdatedRow = pos;
}
}
});
holder.order.setOnFocusChangeListener(new FocusChangeListener());
holder.order.addTextChangedListener(new GenericTextWatcher() {
#Override
public void afterTextChanged(String s) {
boolean valHasChanged = false;
boolean freeHasChanged = false;
int pos = holder.ref;
if (!onBind) {
if (!(s.equals(""))) {
int val = Integer.parseInt(s);
int stock = salesInvoice.get(pos).getStock();
if (val > stock) {
val = stock;
valHasChanged = true;
}
salesInvoice.get(pos).setOrder(val);//make sure we set returnQty before
//checking the total of returnQty and free against stock
if (salesInvoice.get(pos).getOrder() + salesInvoice.get(pos).getFree() > salesInvoice.get(pos).getStock()) {
salesInvoice.get(pos).setFree(0);
freeHasChanged = true;
}
} else {
salesInvoice.get(pos).setOrder(0);
}
if (valHasChanged) {
notifyItemChanged(pos, ORDER);//notify the adapter that value changed and refresh the view mentioned by the string
}
if (freeHasChanged) notifyItemChanged(pos, FREE);
notifyItemChanged(pos, LINEVAL);
lastUpdatedRow = pos;
}
}
});
holder.free.setOnFocusChangeListener(new FocusChangeListener());
holder.free.addTextChangedListener(new GenericTextWatcher() {
#Override
public void afterTextChanged(String s) {
boolean valChanged = false;
int pos = holder.ref;
if (!onBind) {
if ((!s.equals("")) && (!(s.equals("0")))) {
int val = Integer.parseInt(s);
salesInvoice.get(pos).setFree(val);
holder.discount.setEnabled(false);
if (salesInvoice.get(pos).getOrder() + salesInvoice.get(pos).getFree() > salesInvoice.get(pos).getStock()) {
salesInvoice.get(pos).setFree(0);
valChanged = true;
holder.discount.setEnabled(true);
}
} else {
salesInvoice.get(pos).setFree(0);
holder.discount.setEnabled(true);
}
notifyItemChanged(pos, LINEVAL);
if (valChanged) notifyItemChanged(pos, FREE);
holder.setCursor(FREE);
lastUpdatedRow = pos;
}
}
});
holder.discount.setOnFocusChangeListener(new FocusChangeListener());
holder.discount.addTextChangedListener(new GenericTextWatcher() {
#Override
public void afterTextChanged(String s) {
int pos = holder.ref;
if (!(s.equals(salesInvoice.get(pos).getDiscountRate() + ""))) {
if ((!s.equals("")) && (!(s.equals("0"))) && (!(s.equals("0.0"))) && (!(s.equals("0.")))) {
Double rate = Double.parseDouble(s.toString().trim());
Log.i(" RAte ", rate + "");
salesInvoice.get(pos).setDiscountRate(rate);
holder.free.setEnabled(false);
} else {
salesInvoice.get(pos).setDiscountRate(0.0);
holder.free.setEnabled(true);
}
if (!onBind) {
notifyItemChanged(pos, LINEVAL);
lastUpdatedRow = pos;
}
}
}
});
if (position % 2 == 0) {
holder.setColor(Color.LTGRAY);
} else {
holder.setColor(Color.GRAY);
}
onBind = false;
notifyUpdate(); //calling to update the UI
Log.d("ASY", "before db call");
DBAdapterAsync dbAdapter = new DBAdapterAsync(getContextForAdapter);
dbAdapter.execute(salesInvoice.get(holder.ref));
Log.d("ASY", "after db call");
}
//async task class for DB Update
#SuppressLint("StaticFieldLeak")
private class DBAdapterAsync extends AsyncTask<SalesInvoiceModel, Void, String> {
private SQLiteDatabase db;
private DBHelper dbHelper;
DBAdapterAsync(Context context) {
this.dbHelper = new DBHelper(context);
Log.d("ASY", "inside constructor");
}
#Override
protected void onPreExecute() {
try {
db = dbHelper.getWritableDatabase();
} catch (Exception ex) {
ex.printStackTrace();
}
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
try {
dbHelper.close();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
protected String doInBackground(SalesInvoiceModel... models) {
SalesInvoiceModel model = models[0];
Log.d(TAG, "inside updateInvoiceData_");
Log.d(TAG, "shelf_" + model.getShelf());
Log.d(TAG, "order_" + model.getOrder());
Log.d(TAG, "free_" + model.getFree());
String sql = "UPDATE temp_invoice SET" +
" Shelf=" + model.getShelf() + " , Request=" + model.getRequest()
+ " , OrderQty=" + model.getOrder() + " , Free=" + model.getFree()
+ " , Disc=" + model.getDiscountRate() + " , LineVal=" + model.getLineValue()
+ ", RetailPriceLineVal=" + model.getRetailLineVal()
+ " WHERE _id=" + model.getId();
db.execSQL(sql);
Log.d(TAG, "DB method finished,");
Log.d("ASY", "after do in background");
return null;
}
}

notifyDataSetChanged not work in my activity

in my code when delete row of list view list view don't change.i use adapter.notifyDataSetChange() but it not word.this is my code : code make different position of class.
CustomList adapter;
Integer[] imageId;
public String[] _Data2;
public int positionAll;
ArrayList<ArrayList<String>> _Data = new ArrayList<ArrayList<String>>();
DataBase data = new DataBase(Show_Code.this, "MELK_TBL");
try {
data.open();
_Data = data.GetData();
imageId = new Integer[_Data.size()];
_Data2 = new String[_Data.size()];
for (int i = 0; i < _Data.size(); i++) {
imageId[i] = R.drawable.municipal;
_Data2[i] = _Data.get(i).get(1) + "_" + _Data.get(i).get(2) + "_" + _Data.get(i).get(3) + "_" + _Data.get(i).get(4) + "_" + _Data.get(i).get(5) + "_" + _Data.get(i).get(6) + "_0";
}
adapter = new CustomList(Show_Code.this, _Data2, imageId);
data.close();
} catch (Exception e) {
Toast.makeText(getApplication(), e.toString(), Toast.LENGTH_LONG).show();
}
list.setAdapter(adapter);
list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
try {
data.open();
data.Delete(_Data.get(position).get(1), _Data.get(position).get(2), _Data.get(position).get(3), _Data.get(position).get(4), _Data.get(position).get(5), _Data.get(position).get(6), _Data.get(position).get(7));
data.close();
adapter.notifyDataSetChanged();
} catch (Exception e) {
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
return true;
}
});
please help me,i don't any time for it :(

As the size of Array is not changed at run time so u need to create new adapter and set again to list
You have to add this code in onItemLongClick
data.open();
_Data = data.GetData();
imageId = new Integer[_Data.size()];
_Data2 = new String[_Data.size()];
for (int i = 0; i < _Data.size(); i++) {
imageId[i] = R.drawable.municipal;
_Data2[i] = _Data.get(i).get(1) + "_" + _Data.get(i).get(2) + "_" + _Data.get(i).get(3) + "_" + _Data.get(i).get(4) + "_" + _Data.get(i).get(5) + "_" + _Data.get(i).get(6) + "_0";
}
adapter = new CustomList(Show_Code.this, _Data2, imageId);
data.close();
list.setAdapter(adapter)

you are passing _Data2 object in adapter. You should update same object after deleting from data. Try adding this before data.close() in onItemLongClick(AdapterView<?> parent, View view,int position, long id) method:
_Data = data.GetData();
imageId = new Integer[_Data.size()];
_Data2.clear();
for (int i = 0; i < _Data.size(); i++) {
imageId[i] = R.drawable.municipal;
_Data2[i] = _Data.get(i).get(1) + "_" + _Data.get(i).get(2) + "_" + _Data.get(i).get(3) + "_" + _Data.get(i).get(4) + "_" + _Data.get(i).get(5) + "_" + _Data.get(i).get(6) + "_0";
}
Don't create new object of _Data2. Just clear same object and add whole data in it again and after that you can call adapter.notifyDataSetChanged() then this will get updated automatically.

After deleting the values you need to pass the new arraylist in which you had removed all those values and then notify the adapter class. In your case see the below code
list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
try {
data.open();
data.Delete(_Data.get(position).get(1));
data.close();
**//Edited code...**
_Data.get(position).remove(1);
adapter.refreshView(_Data);
**//Edited code...**
} catch (Exception e) {
Toast.makeText(getApplicationContext(), e.toString(), Toast.LENGTH_LONG).show();
}
return true;
}
});
And in adapter class refreshview method will be like below,
public void refreshView(String[] _Data) {
this._Data = _Data;
notifyDataSetChanged();
}
By this way you can notify the data. For example I have deleted only one value and notify.
Hope this is helpful :)

You'll need to reorganize your code, using Methods, only for Select you databe again and do the list.setAdapter(adapter); then use adapter.notifyDataSetChanged();

After rotating screen, always first timer beginning a count

Half month i trying fix this problem, its my second solution and i get old error.
My goal is to write a listView with timer in every row with Start and Stop buttons, after rotating screen all timers should work correctly, but how in pre-solution after rotation screen, first position in listview get time last/lower position.
As for link with these two solution i see just logic of getView() method, and i'm on 100% sure that is the main problem.
Can anybody help me with this, i am at an impasse. Problematic piace of code:
if(isItStart.get(position)){
holder.stop.setEnabled(true);
holder.start.setEnabled(false);
handler.postDelayed(updateTimeThread,0);
}
Here is full class.
ListView listView;
MyAdapter adapter;
Handler handler;
SQLiteDatabase db;
List<Tracker> trackerList;
Tracker tracker;
List<Boolean> isItStart,historyIsItStart;
List<Long> startTime,historyStartTime;
List<Long> lastPauseList,historyLastPauseList;
List<Long> updateTimeList, historyUpdateTimeList;
List<Long> daysList,historyDayList;
List<Long> hoursList,historyHoursList;
List<Long> minutesList,historyMinutes;
List<Long> secondsList,historySecondsList;
int trackerCount;
static final String LOG_TAG = "myTag";
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
handler = new Handler();
db = RemindMe.db;
trackerList = Tracker.getListAll(db);
trackerCount=trackerList.size();
initLists();
for (int i = 0; i < trackerCount; i++) {
startTime.add(0L);
lastPauseList.add(0L);
updateTimeList.add(0L);
daysList.add(0L);
hoursList.add(0L);
minutesList.add(0L);
secondsList.add(0L);
isItStart.add(false);
historyStartTime.add(startTime.get(i));
historyLastPauseList.add(lastPauseList.get(i));
historyUpdateTimeList.add(updateTimeList.get(i));
historyDayList.add(daysList.get(i));
historyHoursList.add(hoursList.get(i));
historyMinutes.add(minutesList.get(i));
historySecondsList.add(secondsList.get(i));
historyIsItStart.add(isItStart.get(i));
}
listView = (ListView)findViewById(R.id.listView);
String[] from = {Tracker.COL_NAME,Tracker.COL_ELAPSED_TIME,Tracker.COL_ELAPSED_TIME,Tracker.COL_ELAPSED_TIME,Tracker.COL_ELAPSED_TIME};
int[] to = {R.id.tvName,R.id.tvDays,R.id.tvHours,R.id.tvMinutes,R.id.tvSeconds};
adapter = new MyAdapter(this,R.layout.list_item,Tracker.getAll(db),from,to,0);
adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
#Override
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
long day,hour,min,sec;
long time = cursor.getLong(columnIndex);
switch(view.getId()){
case R.id.tvDays:
TextView days = (TextView)view;
days.setText("days");
return true;
case R.id.tvHours:
TextView hours = (TextView)view;
hours.setText("hours");
return true;
case R.id.tvMinutes:
TextView minutes = (TextView)view;
minutes.setText("min");
return true;
case R.id.tvSeconds:
TextView seconds = (TextView)view;
if(time!=0){
sec = time/1000;
seconds.setText(String.valueOf(sec));
}else{
seconds.setText("null");
}
return true;
}
return false;
}
});
listView.setAdapter(adapter);
getSupportLoaderManager().initLoader(1,null,this).forceLoad();
}
void initLists(){
startTime = new ArrayList<Long>(trackerCount);
lastPauseList = new ArrayList<Long>(trackerCount);
updateTimeList = new ArrayList<Long>(trackerCount);
daysList = new ArrayList<Long>(trackerCount);
hoursList = new ArrayList<Long>(trackerCount);
minutesList = new ArrayList<Long>(trackerCount);
secondsList = new ArrayList<Long>(trackerCount);
isItStart = new ArrayList<Boolean>(trackerCount);
historySecondsList = new ArrayList<Long>(trackerCount);
historyMinutes = new ArrayList<Long>(trackerCount);
historyHoursList = new ArrayList<Long>(trackerCount);
historyDayList = new ArrayList<Long>(trackerCount);
historyUpdateTimeList = new ArrayList<Long>(trackerCount);
historyLastPauseList = new ArrayList<Long>(trackerCount);
historyStartTime = new ArrayList<Long>(trackerCount);
historyIsItStart = new ArrayList<Boolean>(trackerCount);
}
#Override
public void onClick(View v) {
Intent intent = new Intent(this,AddTrack.class);
startActivity(intent);
}
#Override
public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
return new TrackerLoader(this,db);
}
#Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
adapter.swapCursor(cursor);
}
#Override
public void onLoaderReset(Loader<Cursor> loader) {
}
static class TrackerLoader extends android.support.v4.content.CursorLoader{
SQLiteDatabase db;
TrackerLoader(Context context,SQLiteDatabase db){
super(context);
this.db=db;
}
#Override
public Cursor loadInBackground() {
return Tracker.getAll(db);
}
}
#Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Log.d(LOG_TAG, "onSavedInstanceState---------------------------------------------------------------!");
for (int i = 0; i <trackerCount ; i++) {
historyStartTime.set(i,startTime.get(i));
historyLastPauseList.set(i, lastPauseList.get(i));
historyUpdateTimeList.set(i,updateTimeList.get(i));
historyDayList.set(i, daysList.get(i));
historyHoursList.set(i,hoursList.get(i));
historyMinutes.set(i, minutesList.get(i));
historySecondsList.set(i,secondsList.get(i));
historyIsItStart.set(i, isItStart.get(i));
outState.putSerializable("startTime " + i, historyStartTime.get(i));
outState.putSerializable("lastPause " + i, historyLastPauseList.get(i));
outState.putSerializable("updateTime " + i, historyUpdateTimeList.get(i));
outState.putSerializable("dayList " + i, historyDayList.get(i));
outState.putSerializable("hoursList " + i, historyHoursList.get(i));
outState.putSerializable("minutesList " + i, historyMinutes.get(i));
outState.putSerializable("secondsList " + i, historySecondsList.get(i));
outState.putSerializable("isItStart " + i, historyIsItStart.get(i));
Log.d(LOG_TAG, "startTime " + getTime((Long) outState.getSerializable("startTime " + i)));
Log.d(LOG_TAG, "lastPause " + getTime((Long) outState.getSerializable("lastPause " + i)));
Log.d(LOG_TAG, "updateTime " + getTime((Long) outState.getSerializable("updateTime " + i)));
Log.d(LOG_TAG, "dayList " + getTime((Long) outState.getSerializable("dayList " + i)));
Log.d(LOG_TAG, "hoursList " + getTime((Long) outState.getSerializable("hoursList " + i)));
Log.d(LOG_TAG, "minutesList " + getTime((Long) outState.getSerializable("minutesList " + i)));
Log.d(LOG_TAG, "secondsList " + outState.getSerializable("secondsList " + i));
Log.d(LOG_TAG, "isItStart " + outState.getSerializable("isItStart " + i));
Log.d(LOG_TAG, "position " + i);
Log.d(LOG_TAG,"-----------------------------------!");
}
Log.d(LOG_TAG,"END onSavedInstanceState-------------------------------------------------------------!");
for (int i = 0; i < trackerCount; i++) {
Log.d(LOG_TAG,"secondsList "+i+ " "+secondsList.get(i));
}
}
#Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
Log.d(LOG_TAG, "onRestoreInstanceState-------------------------------------------------------!");
for (int i = 0; i <trackerCount ; i++) {
historyStartTime.set(i,(Long)savedInstanceState.getSerializable("startTime "+i));
historyLastPauseList.set(i,(Long)savedInstanceState.getSerializable("lastPause "+i));
historyUpdateTimeList.set(i,(Long)savedInstanceState.getSerializable("updateTime "+i));
historyDayList.set(i,(Long)savedInstanceState.getSerializable("dayList "+i));
historyHoursList.set(i,(Long)savedInstanceState.getSerializable("hoursList "+i));
historyMinutes.set(i,(Long)savedInstanceState.getSerializable("minutesList "+i));
historySecondsList.set(i,(Long)savedInstanceState.getSerializable("secondsList "+i));
historyIsItStart.set(i,(Boolean)savedInstanceState.getSerializable("isItStart "+i));
startTime.set(i,historyStartTime.get(i));
lastPauseList.set(i,historyLastPauseList.get(i));
updateTimeList.set(i,historyUpdateTimeList.get(i));
daysList.set(i,historyDayList.get(i));
hoursList.set(i,historyHoursList.get(i));
minutesList.set(i,historyMinutes.get(i));
secondsList.set(i,historySecondsList.get(i));
isItStart.set(i, historyIsItStart.get(i));
Log.d(LOG_TAG, "startTime " + getTime((Long) savedInstanceState.getSerializable("startTime " + i)));
Log.d(LOG_TAG,"lastPause " + getTime((Long) savedInstanceState.getSerializable("lastPause " + i)));
Log.d(LOG_TAG,"updateTime " + getTime((Long) savedInstanceState.getSerializable("updateTime " + i)));
Log.d(LOG_TAG,"dayList " + getTime((Long) savedInstanceState.getSerializable("dayList " + i)));
Log.d(LOG_TAG,"hoursList " + getTime((Long) savedInstanceState.getSerializable("hoursList " + i)));
Log.d(LOG_TAG,"minutesList " + getTime((Long) savedInstanceState.getSerializable("minutesList " + i)));
Log.d(LOG_TAG, "secondsList " + savedInstanceState.getSerializable("secondsList " + i));
Log.d(LOG_TAG,"isItStart "+savedInstanceState.getSerializable("isItStart " + i));
Log.d(LOG_TAG,"position "+i);
Log.d(LOG_TAG,"----------------------------------------------------------------");
}
Log.d(LOG_TAG,"END onRestoreIntstanceState-------------------------------------------------------------!");
}
private class MyAdapter extends SimpleCursorAdapter{
Context context;
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
MyAdapter(Context context,int resourceID,Cursor cursor,String[] from,int[]to,int flags){
super(context, resourceID, cursor, from, to, flags);
this.context = context;
}
#Override
public View getView(final int position, View convertView, final ViewGroup parent) {
View row = convertView;
final ViewHolder holder;
tracker = trackerList.get(position);
if(row==null){
holder = new ViewHolder();
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
row = inflater.inflate(R.layout.list_item,parent,false);
holder.name= (TextView)row.findViewById(R.id.tvName);
holder.days = (TextView)row.findViewById(R.id.tvDays);
holder.hours = (TextView)row.findViewById(R.id.tvHours);
holder.minutes = (TextView)row.findViewById(R.id.tvMinutes);
holder.seconds = (TextView)row.findViewById(R.id.tvSeconds);
holder.start = (Button)row.findViewById(R.id.btStart);
holder.stop = (Button)row.findViewById(R.id.btStop);
row.setTag(holder);
}else{
holder = (ViewHolder)row.getTag();
}
holder.start.setEnabled(true);
holder.stop.setEnabled(false);
holder.name.setText(tracker.getName());
final Runnable updateTimeThread = new Runnable() {
#Override
public void run() {
updateTimeList.set(position, (System.currentTimeMillis() - startTime.get(position)) + lastPauseList.get(position));
secondsList.set(position, updateTimeList.get(position) / 1000);
minutesList.set(position, secondsList.get(position) / 60);
hoursList.set(position, minutesList.get(position) / 60);
secondsList.set(position, (secondsList.get(position) % 60));
minutesList.set(position, (minutesList.get(position) % 60));
hoursList.set(position, (hoursList.get(position) % 24));
holder.days.setText(String.format("%04d", daysList.get(position)));
holder.hours.setText(String.format("%02d", hoursList.get(position)));
holder.minutes.setText(String.format("%02d", minutesList.get(position)));
holder.seconds.setText(String.format("%02d", secondsList.get(position)));
handler.postDelayed(this, 0);
}
};
if(isItStart.get(position)){
holder.stop.setEnabled(true);
holder.start.setEnabled(false);
handler.postDelayed(updateTimeThread,0);
}
View.OnClickListener onClickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btStart:
startTime.set(position,System.currentTimeMillis());
handler.post(updateTimeThread);
holder.start.setEnabled(false);
holder.stop.setEnabled(true);
isItStart.set(position,true);
break;
case R.id.btStop:
lastPauseList.set(position, updateTimeList.get(position));
handler.removeCallbacks(updateTimeThread);
holder.stop.setEnabled(false);
holder.start.setEnabled(true);
isItStart.set(position,false);
break;
}
}
};
holder.start.setOnClickListener(onClickListener);
holder.stop.setOnClickListener(onClickListener);
return row;
}
class ViewHolder{
TextView name,days,hours,minutes,seconds;
Button start,stop;
}
}
String getTime(long time){
int hours = (int)(time/3600000);
int minutes = (int)(time -hours*3600000)/60000;
int seconds = (int)(time-hours*3600000-minutes*60000)/1000;
String hour = (hours<9?"0"+hours:hours).toString();
String min = (minutes<9?"0"+minutes:minutes).toString();
String sec = (seconds<9?"0"+seconds:seconds).toString();
return ""+hour+":"+min+":"+sec;
}
}

Add android:configChanges="orientation|screenSize" in manifest.xml and delete your onRestore and onSaved.

When you rotating the screen the application refresh the activity i had the same kind of problem so i just locked the screen for one way in the android mainifest by
android:screenOrientation="portrait"
found this great answer by:Xion
"you could distinguish the cases of your activity being created for the first time and being restored from savedInstanceState. This is done by overriding onSaveInstanceState and checking the parameter of onCreate.
You could lock the activity in one orientation by adding android:screenOrientation="portrait" (or "landscape") to in your manifest.
You could tell the system that you meant to handle screen changes for yourself by specifying android:configChanges="orientation" in the tag. This way the activity will not be recreated, but will receive a callback instead (which you can ignore as it's not useful for you)."

No items on ListControl

I have a problem while displaying a list on Sony SmartWatch 2.
I copied layouts from sample project (AdvancedControlSample) and I have the following class:
public class OpenPositionsView extends ControlExtension implements BaseView {
private static final String LOG_TAG = "TAGG";
private Context context;
private ControlViewGroup mLayout;
public OpenPositionsView(Context context, String hostAppPackageName) {
super(context, hostAppPackageName);
this.context = context;
mLayout = setup();
}
public ControlViewGroup setup() {
Log.i(LOG_TAG, "setup");
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.watch_positions, null);
ControlViewGroup mLayout = (ControlViewGroup) parseLayout(layout);
return mLayout;
}
public void show(Controller parent) {
int listCount = DataProvider.getInstance().getPositions().size();
parent.sendListCountM(R.id.watch_positions_listview, listCount);
parent.sendListPositionM(R.id.watch_positions_listview, 0);
parent.refreshLayout(R.layout.watch_positions, null);
Log.i(LOG_TAG, "show [listCount: " + listCount + "]");
}
#Override
public void onRequestListItem(final int layoutReference, final int listItemPosition) {
Log.d(LOG_TAG, "onRequestListItem [layoutReference: " + layoutReference + ", position: " + listItemPosition + "]");
if (layoutReference != -1 && listItemPosition != -1 && layoutReference == R.id.watch_positions_listview) {
ControlListItem item = createControlListItem(listItemPosition);
if (item != null) {
Log.d(LOG_TAG, "Sending list item");
sendListItem(item);
}
}
}
#Override
public void onListItemSelected(ControlListItem listItem) {
super.onListItemSelected(listItem);
}
#Override
public void onListItemClick(final ControlListItem listItem, final int clickType, final int itemLayoutReference) {
Log.d(LOG_TAG, "onListItemClick [listItemPosition: " + listItem.listItemPosition + ", clickType: " + clickType + ", itemLayoutReference: "
+ itemLayoutReference + "]");
}
public void onClick(int id) {
mLayout.onClick(id);
}
protected ControlListItem createControlListItem(int position) {
Log.d(LOG_TAG, "createControlListItem [position: " + position + "]");
ControlListItem item = new ControlListItem();
item.layoutReference = R.id.watch_positions_listview;
item.dataXmlLayout = R.layout.watch_positions_item;
item.listItemPosition = position;
// We use position as listItemId. Here we could use some other unique id
// to reference the list data
item.listItemId = position;
Position target = DataProvider.getInstance().getPosition(position);
if (target != null) {
Bundle symbolBundle = new Bundle();
symbolBundle.putInt(Control.Intents.EXTRA_LAYOUT_REFERENCE, R.id.watch_position_symbol);
symbolBundle.putString(Control.Intents.EXTRA_TEXT, target.getSymbol());
Bundle typeBundle = new Bundle();
typeBundle.putInt(Control.Intents.EXTRA_LAYOUT_REFERENCE, R.id.watch_position_type);
typeBundle.putString(Control.Intents.EXTRA_TEXT, target.getTypeAsString());
item.layoutData = new Bundle[2];
item.layoutData[0] = symbolBundle;
item.layoutData[1] = typeBundle;
Log.d(LOG_TAG, "Item list created: [symbolBundle: " + symbolBundle + ", typeBundle: " + typeBundle + "]");
}
return item;
}
protected Bundle[] createBundle(int position) {
Bundle[] result = new Bundle[2];
Position target = DataProvider.getInstance().getPosition(position);
if (target != null) {
Bundle symbolBundle = new Bundle();
symbolBundle.putInt(Control.Intents.EXTRA_LAYOUT_REFERENCE, R.id.watch_position_symbol);
symbolBundle.putString(Control.Intents.EXTRA_TEXT, target.getSymbol());
Bundle typeBundle = new Bundle();
typeBundle.putInt(Control.Intents.EXTRA_LAYOUT_REFERENCE, R.id.watch_position_type);
typeBundle.putString(Control.Intents.EXTRA_TEXT, target.getTypeAsString());
result[0] = symbolBundle;
result[1] = typeBundle;
}
return result;
}
}
However, onRequestListItem gets called and createControlListItem returns a correct item list. Touching the display gives me the following result:
onListItemClick [listItem: com.sonyericsson.extras.liveware.extension.util.control.ControlListItem#423b6960, clickType: 0, itemLayoutReference: -1]
The problem is, I do not see any of "added" list items :(

Make sure you also copied the List-related intents from the Manifest.xml:
<action android:name="com.sonyericsson.extras.aef.control.LIST_REFERESH_REQUEST" />
<action android:name="com.sonyericsson.extras.aef.control.LIST_REQUEST_ITEM" />
<action android:name="com.sonyericsson.extras.aef.control.LIST_ITEM_CLICK" />
<action android:name="com.sonyericsson.extras.aef.control.LIST_ITEM_SELECTED" />

Couple questions for you:
What is being shown on the screen? Is it just blank?
Are you calling showLayout() and sendListCount()? I don't see them in the above code. In the sample code in onResume() you should see something like:
showLayout(R.layout.layout_test_list, null);
sendListCount(R.id.listView, mListContent.length);
These need to be called.
Did you make sure that sendListItem(item) is actually being called?

Aren't you adding black text items to layout with black background? :) Please check your layouts.

Get the value of clicked Item of a custom listview?

I have created a Custom listview and set data by parsing a link and sorted them inside the list. Now when I am going to make a click and get the value of the individual object of a row I can't get the object of clicked row.
public class MainActivity extends Activity implements OnChildClickListener,
OnItemClickListener {
private ExpandableListView mExpandableListView;
private List<GroupEntity> mGroupCollection;
String URL;
ArrayList<EventParsingClass> EventObject_Collection = new ArrayList<EventParsingClass>();
ArrayList<Date> DateArray = new ArrayList<Date>();
ArrayList<ArrayList<EventParsingClass>> arrayOfEventDescription = new ArrayList<ArrayList<EventParsingClass>>();
MyListAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.event_mainactivity);
prepareResource();
initPage();
URL = "http://..............";
ParsingWithURL(URL);
}
private void ParsingWithURL(String uRL2) {
// TODO Auto-generated method stub
new JSONPARSINGFOREVENTSTREAM().execute(URL);
}
private class JSONPARSINGFOREVENTSTREAM extends
AsyncTask<String, Void, String> {
private final String TAG_ID = "id";
private final String TAG_Title = "title";
private final String TAG_Description = "description";
private final String TAG_StartDate = "start_datetime";
private final String TAG_EndDate = "end_datetime";
private final String TAG_City = "place_city";
private final String TAG_Club = "place_club";
private final String TAG_AgeLimit = "event_agelimit";
private static final String TAG_Event_streamable = "data";
EventParsingClass EPC;
JSONArray streamable = null;
ProgressDialog pDialog;
#SuppressLint("SimpleDateFormat")
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
Log.d("************PARAMS", arg0[0]);
JSONParser jparser = new JSONParser();
JSONObject json = jparser.getJSONFromUrl(arg0[0]);
try {
streamable = json.getJSONArray(TAG_Event_streamable);
for (int i = 0; i < streamable.length(); i++) {
EPC = new EventParsingClass();
JSONObject c = streamable.getJSONObject(i);
EPC.setId(c.getString(TAG_ID));
EPC.setPlace_city(c.getString(TAG_City));
EPC.setPlace_club(c.getString(TAG_Club));
EPC.setTitle(c.getString(TAG_Title));
EPC.setDescription(c.getString(TAG_Description));
EPC.setSratdate_time(c.getString(TAG_StartDate));
EPC.setEnddate_time(c.getString(TAG_EndDate));
EPC.setEvent_agelimit(c.getString(TAG_AgeLimit));
long difference = EPC.geEnddate_time_date().getTime()
- EPC.getSratdate_time_date().getTime();
int day_difference = (int) (difference / (1000 * 3600 * 24));
// Log.d("Difference", "" + day_difference);
if (day_difference == 0) {
AddDay(EPC.getSratdate_time_date());
} else {
if (DateArray.size() == 0) {
DateArray.add(EPC.getSratdate_time_date());
long startday = EPC.getSratdate_time_date()
.getTime();
for (int k = 1; k <= day_difference; k++) {
long constructedday = startday
+ (1000 * 3600 * 24) * k;
Date Constructed_value = new Date(
constructedday);
DateArray.add(Constructed_value);
}
} else {
AddDay(EPC.getSratdate_time_date());
long startday = EPC.getSratdate_time_date()
.getTime();
for (int k = 1; k <= day_difference; k++) {
long constructedday = startday
+ (1000 * 3600 * 24) * k;
Date Constructed_value = new Date(
constructedday);
AddDay(Constructed_value);
}
}
}
EventObject_Collection.add(EPC);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
private void AddDay(Date value) {
// TODO Auto-generated method stub
if (DateArray.size() == 0) {
DateArray.add(value);
} else {
boolean b = true;
for (Date s : DateArray) {
if (s.equals(value)) {
b = false;
break;
}
}
if (b) {
DateArray.add(value);
}
}
}
#Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Log.d("+++++++++++++++++++++++number of Items in List", ""
+ DateArray.size());
AddDetailedItemToListView();
AddHeaderItemsToListView();
pDialog.dismiss();
}
private void AddDetailedItemToListView() {
// TODO Auto-generated method stub
for (Date s : DateArray) {
ArrayList<EventParsingClass> constructed_arrayfor_items = new ArrayList<EventParsingClass>();
for (int g = 0; g < EventObject_Collection.size(); g++) {
EventParsingClass EVPC = EventObject_Collection.get(g);
long new_startdate = EVPC.getSratdate_time_date().getTime();
long new_endtdate = EVPC.geEnddate_time_date().getTime();
long date = s.getTime();
if (date >= new_startdate && date <= new_endtdate) {
Log.d("^^^^^^^^^^^ Value Of Date ", "" + s);
Log.d("^^^^^^^^^^^ Value Of StartDay ",
"" + EVPC.getSratdate_time_date());
Log.d("^^^^^^^^^^^ Value Of EndDay ",
"" + EVPC.geEnddate_time_date());
constructed_arrayfor_items.add(EVPC);
}
}
arrayOfEventDescription.add(constructed_arrayfor_items);
Log.d("^^^^^^^^^^^^^^^^^^^arrayOfEventDescription", ""
+ arrayOfEventDescription);
}
}
private void AddHeaderItemsToListView() {
// TODO Auto-generated method stub
ListView lv = (ListView) findViewById(R.id.list_evevnt);
LayoutInflater i = LayoutInflater.from(MainActivity.this);
List<Item> items = new ArrayList<Item>();
int length_of_datearray = DateArray.size();
Log.d("!!!!!!!!!!!!!!!", "" + DateArray.size());
Log.d("EEEEEEEEEEEEEEEEEEEE", "" + arrayOfEventDescription.size());
for (ArrayList<EventParsingClass> It : arrayOfEventDescription) {
Log.d("", "" + It.size());
for (EventParsingClass oETC : It) {
Log.d("*******" + oETC.getTitle(),
"" + oETC.getSratdate_time_date());
}
}
for (int m = 0; m < length_of_datearray; m++) {
String day_of_header = (String) android.text.format.DateFormat
.format("EEEE", DateArray.get(m));
String month_of_header = (String) android.text.format.DateFormat
.format("MMM", DateArray.get(m));
String date_of_header = (String) android.text.format.DateFormat
.format("dd", DateArray.get(m));
String total_header = day_of_header + " " + month_of_header
+ " " + date_of_header;
items.add(new Header(i, "" + total_header));
ArrayList<EventParsingClass> Arraylist_for_loop = arrayOfEventDescription
.get(m);
for (int h = 0; h < Arraylist_for_loop.size(); h++) {
String description = Arraylist_for_loop.get(h).getId();
String title = Arraylist_for_loop.get(h).getTitle();
String place_city = Arraylist_for_loop.get(h)
.getPlace_city();
String age_limit = Arraylist_for_loop.get(h)
.getEvent_agelimit();
String dayOfTheWeek = (String) android.text.format.DateFormat
.format("EEEE", Arraylist_for_loop.get(h)
.getSratdate_time_date());
String DayofWeek = dayOfTheWeek;
if (!(dayOfTheWeek == day_of_header)) {
DayofWeek = day_of_header;
}
SimpleDateFormat sdf = new SimpleDateFormat("EEEE");
Date d = new Date();
String Today = sdf.format(d);
String Value_of_today = "";
if (Today.contentEquals(DayofWeek)) {
Value_of_today = "Today";
}
items.add(new EventItem(i, Value_of_today, DayofWeek,
"12:00", title, description, place_city, "10",
age_limit));
}
}
MyListAdapter adapter = new MyListAdapter(MainActivity.this, items);
lv.setAdapter(adapter);
lv.setOnItemClickListener(MainActivity.this);
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Loading...");
pDialog.setCancelable(true);
pDialog.show();
}
}
private void prepareResource() {
mGroupCollection = new ArrayList<GroupEntity>();
for (int i = 1; i < 3; i++) {
GroupEntity ge = new GroupEntity();
ge.Name = "City " + i;
for (int j = 1; j < 4; j++) {
GroupItemEntity gi = ge.new GroupItemEntity();
gi.Name = "Venu" + j;
ge.GroupItemCollection.add(gi);
}
mGroupCollection.add(ge);
}
}
private void initPage() {
mExpandableListView = (ExpandableListView) findViewById(R.id.expandableListView);
ExpandableListAdapter adapter = new ExpandableListAdapter(this,
mExpandableListView, mGroupCollection);
mExpandableListView.setAdapter(adapter);
mExpandableListView.setOnChildClickListener(this);
}
#Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Toast.makeText(getApplicationContext(), childPosition + "Clicked",
Toast.LENGTH_LONG).show();
return true;
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
EventParsingClass obj = (EventParsingClass) parent.getItemAtPosition(position);
Toast.makeText(getApplicationContext(), obj.getPlace_city() + "Clicked",Toast.LENGTH_LONG).show();
}
}
How can I proceed in these two scenarios?
EventParsingClass EPSP= ??? and
EPSP.getid= ??

fetch[0]="XXX"
fetch[1]="YYY"
fetch[2]="ZZZ"
lv.setOnItemClickListener(MainActivity.this);
public void onItemClick(AdapterView<?> parent, View view, int position,long id)
Toast.makeText(getApplicationContext(), fetch[position] + "Clicked",
Toast.LENGTH_LONG).show();
}
just declare fetch[position] to get the value of clicked item. hope this will give you some solution.

Use int position to find out values from your data list (array list or what ever you used).
lv.setOnItemClickListener(MainActivity.this);
public void onItemClick(AdapterView<?> parent, View view, int position,long id)
Toast.makeText(getApplicationContext(), EPSP.getid(position) + "Clicked",Toast.LENGTH_LONG).show();
}

EventItem item = (EventItem) parent.getItemAtPosition(position);
Now you have a hold of EventItem. So you can start using the get methods of your EventItem class in order to get whatever you want from it.

I got the solution:
EventParsingClass new_method(int value) {
int item_count = 0;
for (int i = 0; i < arrayOfEventDescription.size(); i++) {
ArrayList<EventParsingClass> Arraylist_for_loop = arrayOfEventDescription
.get(i);
item_count++;
for (int j = 0; j < Arraylist_for_loop.size(); j++) {
if (value == item_count) {
return Arraylist_for_loop.get(j);
}
item_count++;
}
}
return null;
}
And call it from here:
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
EventParsingClass newObject = new_method(arg2);
if (newObject == null) {
} else {
Log.d("Generated Value Id : ", "" + newObject.getId());
Toast.makeText(getApplicationContext(),
"Item Clicked" + arg2 + "-----" + newObject.getTitle(),
Toast.LENGTH_LONG).show();
}
}