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The date of audio file is same for all audio file

When I run this code I get all the list of image give below audio files but, the date of all the audio files are same like 20 Jan 1970 . below the code of AudioActivity.java. I don't know how I can do it if is possible .
public class AudioActivity extends AppCompatActivity {
Adapter adapter;
RecyclerView recyclerView;
private SlideAdapter slideAdapter;
public static final int PERMIT = 1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_audio);
Toolbar toolbar = findViewById(R.id.aa_toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(true);
getSupportActionBar().setTitle("Call Tank");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
recyclerView = findViewById(R.id.recyclerview);
fetchSongs();
}
private void fetchSongs() {
//define list to carry songs
List<ModelClass> songs = new ArrayList<>();
Uri songLibraryUri;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
songLibraryUri = MediaStore.Audio.Media.getContentUri(MediaStore.VOLUME_EXTERNAL);
} else {
songLibraryUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
//projection
String[] projection = new String[]{
MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.DISPLAY_NAME,
MediaStore.Audio.Media.DATE_MODIFIED,
MediaStore.Audio.Media.DATA
};
//sort order
String sortOrder = MediaStore.Audio.Media.DATE_ADDED + " DESC";
//Querying
try (Cursor cursor = getContentResolver().query(songLibraryUri, projection, null, null, sortOrder)) {
// cache the cursor indices
int idColumn = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID);
int nameColumn = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME);
int dateColumn = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATE_MODIFIED);
int pathColimn = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
//getting the values
while (cursor.moveToNext()) {
// get values of colums for a give audio files
long id = cursor.getLong(idColumn);
String name = cursor.getString(nameColumn);
long date = cursor.getLong(dateColumn);
String path = cursor.getString(pathColimn);
//song uri
Uri uri = ContentUris.withAppendedId(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, id);
//remove .mp3 extension on song's name
name = name.substring(0, name.lastIndexOf("."));
// song item
ModelClass song = new ModelClass(path, name, uri, date);
// add song to songs list
songs.add(song);
}
Intent i = new Intent(AudioActivity.this,Onboarding.class);
Bundle bundle = new Bundle();
bundle.putSerializable("songs", (Serializable) songs);
i.putExtras(bundle);
startActivity(i);
//Intent intent = new Intent(AudioActivity.this,Onboarding.class);
// intent.putExtra("songs", (Serializable) songs);
//show songs on rv
showSongs(songs);
Toast.makeText(this, "Number of Songs:" + songs.size(), Toast.LENGTH_SHORT).show();
}
}
private void showSongs(List<ModelClass> songs) {
// songs.clear();
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(RecyclerView.VERTICAL);
recyclerView.setLayoutManager(layoutManager);
adapter = new Adapter(songs);
recyclerView.setAdapter(adapter);
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
item.getItemId();
return super.onOptionsItemSelected(item);
}
}
Below the code of Adapter.java
public class Adapter extends RecyclerView.Adapter<Adapter.ViewHolder> {
List<ModelClass> songs;
public Adapter(List<ModelClass> songs) {
this.songs = songs;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
// View view = LayoutInflater.from(parent).inflate(R.layout.item_layout,parent,false);
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view = inflater.inflate(R.layout.item_layout,parent,false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, int position) {
ModelClass modelClass = songs.get(position);
String file = modelClass.getFilename();
holder.fileName.setText(file);
Long dateTime = modelClass.getDate();
String currentDate = DateFormat.getDateInstance().format(dateTime);
holder.date.setText(currentDate);
MediaPlayer mediaPlayer = new MediaPlayer();
String audioPath = modelClass.getPath();
try {
mediaPlayer.setDataSource(audioPath);
} catch (IOException e) {
e.printStackTrace();
}
holder.play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
try {
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mP) {
mP.start();
holder.play.setVisibility(View.INVISIBLE);
holder.pause.setVisibility(View.VISIBLE);
}
});
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
}
});
holder.pause.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mediaPlayer.stop();
holder.play.setVisibility(View.VISIBLE);
holder.pause.setVisibility(View.INVISIBLE);
}
});
}
#Override
public int getItemCount() {
return songs.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView play , pause;
TextView fileName, date;
public ViewHolder(#NonNull View itemView) {
super(itemView);
play = itemView.findViewById(R.id.play);
pause= itemView.findViewById(R.id.pause);
fileName = itemView.findViewById(R.id.fileName);
pause.setVisibility(View.INVISIBLE);
date = itemView.findViewById(R.id.date);
}
}
} // the code end
Date of all the audio files are same in the list
This is ModalClass.java
public class ModelClass {
String path,filename;
Uri uri;
Long date;
public ModelClass(String path, String filename, Uri uri, Long date) {
this.path = path;
this.filename = filename;
this.date = date;
this.uri = uri;
}
public ModelClass() {
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public String getFilename() {
return filename;
}
public void setFilename(String filename) {
this.filename = filename;
}
public Uri getUri() {
return uri;
}
public void setUri(Uri uri) {
this.uri = uri;
}
public Long getDate() {
return date;
}
public void setDate(Long date) {
this.date = date;
}
}

Long dateTime = modelClass.getDate()
You did not post the code for getDate() while there starts your problem.
It problably returns 0 for all files.
And 0 equals 20 Jan 1970.

Why does Room database lose data after restarting the app?

I'm using Room Persistance library with all Android Architucture Components. In the app I have 3 databases, but the problem is with only one. In my MainActivity I have a RecyclerView that show data (dates) from DatesDatabase. When clicking on each element, a new activity opens and shows all the data that refers to particular date. The query in DAO is:
#Query("SELECT * FROM Sorted WHERE date = :date")
LiveData<List<Sorted>> getSortedWhereDateIs(String date);
Problem is that when I restart the app I still can see the dates, that have been added earlier, but there is no data that refers to this date.
Before restarting:
screenshot1
screenshot2
After restarting:
screenshot1
screenshot2
Code to DatesDatabase:
#Database(entities = {Dates.class}, version = 2, exportSchema = false)
public abstract class DatesDatabase extends RoomDatabase {
private static DatesDatabase instance;
public abstract DatesDao datesDao();
public static synchronized DatesDatabase getInstance(Context context){
if (instance == null){
instance = Room.databaseBuilder(context.getApplicationContext(),
DatesDatabase.class, "dates_database").fallbackToDestructiveMigration()
.build();
}
return instance;
}
}
Code to database, that doesn't save data:
#Database(entities = {Sorted.class}, version = 3, exportSchema = false)
public abstract class SortedDatabase extends RoomDatabase {
private static SortedDatabase instanceSorted;
public abstract SortedDao sortedDao();
public static synchronized SortedDatabase getSortedInstance(Context context) {
if (instanceSorted == null) {
instanceSorted = Room.databaseBuilder(context.getApplicationContext(),
SortedDatabase.class, "unsorted_database").fallbackToDestructiveMigration().build();
}
return instanceSorted;
}
}
I tried to delete "fallbackToDestructiveMigration()", but I have a method "deleteAll", that shows error in this case:
viewModel.deleteAllDates();
viewModel.deleteAllUnsorted();
viewModel.deleteAllSorted();
Here is how I add data to SortedDatabase(that gets deleted):
if (choosedMethod.equals("Eat a frog")) {
for (int i = 0; i < eatAFrogList.size(); i++){
Unsorted unsorted = eatAFrogList.get(i);
String name = unsorted.getName();
String date = unsorted.getDate();
int timeBegin = unsorted.getTimeBegin();
boolean attach = unsorted.isAttach();
int category = unsorted.getCategory();
int duration = unsorted.getDuration();
String categoryChart = unsorted.getCategoryChart();
Sorted sorted = new Sorted(name, timeBegin, duration, category, attach, date,
categoryChart);
viewModel1.insertSorted(sorted);
}
I sort tasks of class Unsorted, stored in UnsortedDatabase, through algorithm and then add it to SortedDatabase.
My adapter to recyclerview that shows sorted data:
public class SortedAdapter extends RecyclerView.Adapter<SortedAdapter.SortedViewHolder> {
private List<Sorted> list = new ArrayList<>();
#NonNull
#Override
public SortedViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.tasks_layout , parent, false);
return new SortedAdapter.SortedViewHolder(itemView);
}
#Override
public void onBindViewHolder(#NonNull SortedViewHolder holder, int position) {
Sorted data = list.get(position);
holder.title.setText(data.getSortedName());
holder.date.setText(data.getSortedDate());
holder.category.setText(String.valueOf(data.getSortedCategory()));
holder.attach.setText(String.valueOf(data.isSortedAttach()));
holder.to.setText(String.valueOf(toTime(data.getSortedDuration() + data.getSortedTimeBegin())));
holder.from.setText(String.valueOf(toTime(data.getSortedTimeBegin())));
}
public void setSortedData(List<Sorted> sortedList){
this.list = sortedList;
notifyDataSetChanged();
}
#Override
public int getItemCount() {
return list.size();
}
class SortedViewHolder extends RecyclerView.ViewHolder{
private TextView title;
private TextView date;
private TextView from;
private TextView to;
private TextView category;
private TextView attach;
SortedViewHolder(#NonNull View itemView) {
super(itemView);
title = itemView.findViewById(R.id.tv_title);
date = itemView.findViewById(R.id.tv_date);
from = itemView.findViewById(R.id.tv_from2);
to = itemView.findViewById(R.id.tv_to2);
category = itemView.findViewById(R.id.tv_category);
attach = itemView.findViewById(R.id.tv_attach);
}
}
}
And, finally, activity, where data is shown:
public class ShowSortedActivity extends AppCompatActivity {
SortedViewModel viewModel;
AppPreferenceManager preferenceManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
preferenceManager = new AppPreferenceManager(this);
if (preferenceManager.getDarkModeState()){
setTheme(R.style.Dark);
}
else{
setTheme(R.style.AppTheme);
}
setContentView(R.layout.activity_show_sorted);
final SortedAdapter adapter = new SortedAdapter();
RecyclerView showSorted = findViewById(R.id.show_sorted);
showSorted.setLayoutManager(new LinearLayoutManager(this));
showSorted.setHasFixedSize(true);
showSorted.setAdapter(adapter);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_close);
setTitle("Sorted");
Intent intent = getIntent();
String currentDate = intent.getStringExtra("value");
viewModel = new ViewModelProvider(this, ViewModelProvider.AndroidViewModelFactory.getInstance(this.getApplication())).get(SortedViewModel.class);
try {
viewModel.getSortedWhereDateIs(currentDate).observe(this, new Observer<List<Sorted>>() {
#Override
public void onChanged(List<Sorted> sorteds) {
adapter.setSortedData(sorteds);
}
});
} catch (ExecutionException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
Maybe the data isn't deleted, but there is a problem with displaying it? I could't find my mistake... Thanks for any help.

I guess the problem was because of me creating two databases with the same name "unsorted_database". It seems to work now.

Insert data from Google Sheets into Listview

I'm developing an Android app using Google Sheets as a database.
I have information about books in a Google Sheet (title, author, cover, date, etc). I want to retrieve this information and show it in a "Listview" in the "Spreadsheets" Activity. I created a "BookItem" object and an "BookAdapter" adapter. In the "Spreadsheets.java" I have the read method, called "getDataFromApi()". I know that this method works, but I don't know how to adapt it to my "BookAdapter" and show the information on the ListView.
This is mi code:
public class BookItem {
static String title_item;
static Drawable cover_item; //probar con String
public BookItem(String title, Drawable cover){
super();
this.title_item = title;
this.cover_item = cover;
}
public String getTitle() {
return title_item;
}
public void setTitle(String title){
this.title_item = title;
}
public static Drawable getCover() {
return cover_item;
}
public void setCover(Drawable cover) {
this.cover_item = cover;}
This is my BookAdapter:
public class BookAdapter extends BaseAdapter {
private ArrayList<BookItem> items;
List<BookItem> items;
private Context context;
public BookAdapter (Context context, List<BookItem> items) {
this.context = context;
this.items = items;
}
#Override
public int getCount() {
return items.size();
}
#Override
public BookItem getItem(int position) {
return this.items.get(position);
}
#Override
public long getItemId(int i) {
return 0;
}
private static class ViewHolder {
public final ImageView cover_item;
public final TextView title_item;
public ViewHolder (ImageView cover_item, TextView title_item){
this.cover_item = cover_item;
this.title_item = title_item;
}
}
#Override
public View getView (int position, View view, ViewGroup viewGroup) {
ImageView cover_item;
TextView title_item;
if (view == null) {
view = LayoutInflater.from(context).inflate(R.layout.fila_lista_miestanteria, viewGroup, false); //se mete aqui en getView por ser baseAdapter
title_item = (TextView) view.findViewById(R.id.book_title_item);
cover_item = (ImageView) view.findViewById(R.id.book_cover_item);
view.setTag(R.id.book_title_item, title_item);
view.setTag(R.id.book_cover_item, cover_item);
}
else {
cover_item = (ImageView) view.getTag(R.id.book_cover_item);
title_item = (TextView)view.getTag(R.id.book_title_item);
}
BookItem bookItem = getItem(position);
cover_item.setImageDrawable(bookItem.getCover());
title_item.setText(bookItem.getTitle());
return view;
}
}
public class Spreadsheets extends Activity {
static String book_title, book_author, book_date, book_category, book_description, book_rating, book_cover;
static String read_only = "no";
static String book_favorite = "no";
static GoogleAccountCredential mCredential;
private ListView bookList;
private TextView mOutputText;
ProgressDialog mProgress;
Context context;
List<String> rst;
List<BookItem> resultados;
BookAdapter adapter;
private static final String[] SCOPES = {SheetsScopes.SPREADSHEETS};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.spread);
// mOutputText = (TextView) findViewById(R.id.outputText);
bookList = (ListView) findViewById(R.id.bookList);
// mOutputText.setText("");
mProgress = new ProgressDialog(this);
mProgress.setMessage("Calling Google Sheets...");
// Initialize credentials and service object.
mCredential = GoogleAccountCredential.usingOAuth2(
getApplicationContext(), Arrays.asList(SCOPES))
.setBackOff(new ExponentialBackOff());
System.out.print("read only es igual a "+ read_only);
new MakeRequestTask(mCredential).execute();
}
public void rellenar(){
System.out.println("VOY A HACER NEW BOOK ADAPTER ");
adapter = new BookAdapter(context, resultados);
bookList.setAdapter(adapter);
System.out.println("SETADAPTER");
}
private class MakeRequestTask extends AsyncTask<Void, Void, List<String>> {
private Exception mLastError = null;
MakeRequestTask(GoogleAccountCredential credential) {
}
#Override
protected List<String> doInBackground(Void... params) {
try {
if(read_only.equals("no")) {
setDataToApi();
return null;
}
else {
return getDataFromApi();
}
} catch (Exception e) {
mLastError = e;
cancel(true);
return null;
}
}
private List<String> getDataFromApi() throws IOException {
String range = "Sheet1!A1:H";
List<String> results = new ArrayList<String>();
ValueRange response = CreateSpreadsheets.mService.spreadsheets().values()
.get(CreateSpreadsheets.spreadsheet_id, range)
.execute();
List<List<Object>> values = response.getValues();
if (values != null) {
for (List row : values) {
results.add(row.get(0) + ", " + row.get(7));
}
}
//funcion();
return results;
}
private void setDataToApi() throws IOException {
String range = "Sheet1!A2:H";
List<List<Object>> values = new ArrayList<>();
List<Object> data1 = new ArrayList<>();
data1.add(book_title);
data1.add(book_author);
data1.add(book_date);
data1.add(book_category);
data1.add(book_description);
data1.add(book_rating);
data1.add(book_cover);
data1.add("a");
values.add(data1);
ValueRange valueRange = new ValueRange();
valueRange.setMajorDimension("ROWS");
valueRange.setRange(range);
valueRange.setValues(values);
ValueRange body = new ValueRange().setValues(values);
AppendValuesResponse response =
CreateSpreadsheets.mService.spreadsheets().values().append(CreateSpreadsheets.spreadsheet_id, range, body)
.setValueInputOption("RAW")
.execute();
}
#Override
protected void onPreExecute() {
//mOutputText.setText("");
mProgress.show();
}
#Override
protected void onPostExecute(List<String> output) {
mProgress.hide();
if (output == null || output.size() == 0) {
// mOutputText.setText("No results returned.");
} else {
if(read_only.equals("no")) {
Intent intent = new Intent(Spreadsheets.this, MainActivity.class);
startActivity(intent);
// mOutputText.setText("Se ha añadido un libro a su lista");
}
else {
System.out.println("VOY A RELLENAR LA LISTA");
rellenar();
}
}
}
#Override
protected void onCancelled() {
}
}
}
The "spread.xml" is a list, and the "fila_list_miestanteria.xml" is a TextView&ImageView to show the book info.
Thank you so much!

ListView Refresh with web service Response in android

I have problem to set data into listview. Problem occurs after set message, message is set first after come 8th message from thread.
**below is my whole code :****(Here is my "Activity and adapter")**
public class Inboxreadmsg extends ActionBarActivity {
// <strong>Here is my global variable</strong>
ListView lv;
Handler h;
Custom_Inbox_Adapter ccAdpt;
Custom_Inbox_Adapter inadapter;
Runnable checker;
List<Dataset> dataset;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.messagesublistlayout);
// map id from layout</strong>
lv =(ListView)findViewById(R.id.readmessagelist);
/*****************************call thread of webservice with database****************************/
runThread();
startHandler();
/*****************************call thread of webservice with database****************************/
}
public void runThread()
{
h=new Handler();
checker=new Runnable()
{
#Override
public void run() {
// call webservice for fetch data
forthread();
h.postDelayed(checker,15000);
}
};
}
public void forthread()
{
// call webservice to fetch data
new InboxReadChat(null, InboxReadChat.TotalMessagesOfSingleSenderUser.geturl( recipientid,InAppUserid), InboxReadChat.TYPE_GET, InboxReadChat.TYPE_RECEIVE_MESSAGE_INBOX, new ServiceHitListenerInboxChat() {
#Override
public void onSuccess(Object Result, int id)
{
// After success of webservice response come this function
callFxnInSuccess(Result);
}
#Override
public void onError(String Error, int id)
{
// AfterError of webservice response come this function
// By this fxn set data from local database to listview
DBvaluesSet();
}
});
}
private void callFxnInSuccess(Object Result) {
dataset = new ArrayList<Dataset>();
String message="",alldatetime="",time="",date="",type="";
InboxDeliveredModel ibx=(InboxDeliveredModel) Result;
if(ibx.getTotalMessagesOfSingleSenderUser().size()>0)
{
// here webservice response data will add on local database
dbObject.Open();
for(int i=0;i<ibx.getTotalMessagesOfSingleSenderUser().size();i++)
{
message =ibx.getTotalMessagesOfSingleSenderUser().get(i).getMessage();
.....
dbObject.InboxMessageAll(message,InAppUsermobile,time,recipientid,type,date);
}
dbObject.close();
// After add data into database call below fxn to fetch data from database and set data in listview with adapter
try
{
DBvaluesSet();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
public void DBvaluesSet() {
dataset = new ArrayList<Dataset>();
try
{
// By this code fetch data from local database
Cursor c;
dbObject.Open();
c=dbObject.getallmessages(recipientid);
int countRow = c.getCount();
int counter = 0;
while(c.moveToNext())
{
msgboxitem = c.getString(0);
// number = c.getString(1);
timeitem = c.getString(2);
typeitem = c.getString(4);
datedbitem = c.getString(5);
try {
dataset.add(db.new Dataset(datedbitem, msgboxitem, timeitem, typeitem));
} catch (Exception e) {
e.printStackTrace();
}
}
dbObject.close();
// by below set data into listview into adapter
lv.setAdapter(ccAdpt=new Custom_Inbox_Adapter( getApplicationContext(),dataset,R.layout.row));
ccAdpt.notifyDataSetChanged();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
Here my adapter coding...
public class Custom_Inbox_Adapter extends BaseAdapter{
private Context gContext;
private List<Dataset> gData;
private int rEsource;
public Custom_Inbox_Adapter(Context cnt, List<Dataset> data ,int resource){
this.gData = data;
this.gContext = cnt;
this.rEsource = resource;
}
#Override
public int getCount() {
return gData.size();
}
#Override
public Dataset getItem(int position) {
return gData.get(position);
}
#Override
public long getItemId(int position) {> return gData.get(position).hashCode();
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
LayoutInflater inflater = (LayoutInflater) gContext.getSystemService(gContext.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(rEsource, null);
TextView txtReceiveMsg = (TextView) convertView.findViewById(R.id.ReceiveMsg);
TextView txtReceiveTime = (TextView) convertView.findViewById(R.id.ReceiveTime);
TextView txtSendMsg = (TextView) convertView.findViewById(R.id.sendMsg);
TextView txtSendTime = (TextView) convertView.findViewById(R.id.senttime);
TextView date = (TextView) convertView.findViewById(R.id.date);
// layout text chat
RelativeLayout relSend = (RelativeLayout) convertView.findViewById(R.id.LinearReceive);
RelativeLayout relreceive = (RelativeLayout) convertView.findViewById(R.id.LinearSend);
// layout date chat
RelativeLayout LinearDATE= (RelativeLayout) convertView.findViewById(R.id.LinearDATE);
if(position == 0){
fetchdata= gData.get(position).getDate().trim();
date.setText(fetchdata);
}
else{
fetchdata = gData.get(position).getDate().trim();
dd = gData.get((position-1)).getDate().trim();
if(fetchdata.equalsIgnoreCase(dd))
{
LinearDATE.setVisibility(View.GONE);
}
else
{
LinearDATE.setVisibility(View.VISIBLE);
Log.w("INBOX READ", "INBOX_READ_ADAPTER::::(date for position '1'):"+fetchdata);
date.setText(fetchdata);
}
}
relreceive.setVisibility(View.GONE);
relSend.setVisibility(View.VISIBLE);
//txtReceiveNumber.setText(number);
txtReceiveMsg.setText(cutmsg);
txtReceiveTime.setText(time);
}
return convertView;
}
}

Loading images in listview asynchronously with callback

I'm using Parse in my app, and in order to load my 'profile' images, I need to retrieve a so called Parsefile. When the Parsefile is downloaded it uses a callback to notify when it's done. Now this is generally a nice way to do things but I encountered a problem with this when using a Listview and downloading the images with an Asynctask.
The problem is as follows:
In my ListView adapter in the getView method, I create an AsyncTask and execute it, this AsyncTask starts the retrieveProfileImage(callBack) function. In my callback I simply start a Runnable on the UI thread to update the ImageView in the View with the new (retrieved Image). The problem however as it seems, is the fact that as soon as I start my AsyncTask, the View is returned. So I can't set the other images to the correct row. I hope my code demonstrates my problem more clearly.
The ListAdapter:
public class FriendListAdapter extends ArrayAdapter<Profile> {
private int resource;
private Context context;
private List<Profile> friends;
private Profile fProfile;
private Bitmap profileImageBitmap;
private ProgressBar friendImageProgressBar;
//ui
private ImageView friendImage;
public FriendListAdapter(Context context, int resource,
List<Profile> objects) {
super(context, resource, objects);
this.context = context;
this.resource = resource;
this.friends = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView friendName = null;
friendImage = null;
View rowView = convertView;
if (rowView == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
rowView = inflater.inflate(R.layout.friendslist_row, null);
friendName = (TextView) rowView.findViewById(R.id.fName);
friendImage = (ImageView) rowView
.findViewById(R.id.fImage);
friendImageProgressBar = (ProgressBar) rowView.findViewById(R.id.friendImageProgressBar);
} else {
friendName = (TextView) convertView.findViewById(R.id.fName);
friendImage = (ImageView) convertView.findViewById(R.id.fImage);
friendImageProgressBar = (ProgressBar) convertView.findViewById(R.id.friendImageProgressBar);
}
fProfile = friends.get(position);
DownloadProfileImage dImg = new DownloadProfileImage();
dImg.execute();
friendName.setText(fProfile.getName());
return rowView;
}
private class DownloadProfileImage extends AsyncTask<Void, Integer, String> {
#Override
protected String doInBackground(Void... arg0) {
Log.d("logpp", "Starting download image for " + fProfile.getName());
fProfile.retrieveProfileImage(new ProfileImageCallback());
return null;
}
}
private class ProfileImageCallback extends GetDataCallback {
#Override
public void done(byte[] bytearray, ParseException e) {
if (e == null) {
Log.d("logpp", "Done downloading image for " + fProfile.getName() + ". Setting bitmap to:" +
" " + friendImage.getId());
profileImageBitmap = BitmapManager
.getBitmapFromByteArray(bytearray);
((Activity) context).runOnUiThread(new UpdateUi());
}
}
}
private class UpdateUi implements Runnable {
#Override
public void run() {
friendImage.setImageBitmap(profileImageBitmap);
friendImage.setVisibility(View.VISIBLE);
friendImageProgressBar.setVisibility(View.INVISIBLE);
}
}
}
The retrieveProfileImage method:
public void retrieveProfileImage(GetDataCallback callBack) {
this.image.getDataInBackground(callBack);
}
I hope someone can help me with this one.
Regards,
Tim

i solved this problem by following code
public View getView(int position, View convertView, ViewGroup parent) {
try {
if (inflater == null)
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.answer_item, null);
TextView name = (TextView) convertView.findViewById(R.id.textView_ans_user_name);
TextView body = (TextView) convertView.findViewById(R.id.textView_ans_user_body);
TextView timestamp = (TextView) convertView.findViewById(R.id.textView_ans_user_timestamp);
final CircularImageView thumbnail = (CircularImageView) convertView.findViewById(R.id.imageView_ans_user);
Parse_answer_model ans = answers.get(position);
name.setText(ans.getAns_by());
body.setText(ans.getAns_body());
SimpleDateFormat sdfAmerica = new SimpleDateFormat("dd-M-yyyy hh:mm:ss a");
sdfAmerica.setTimeZone(TimeZone.getDefault());
String sDateInAmerica = sdfAmerica.format(ans.getCreatedAt());
timestamp.setText(sDateInAmerica);
ParseQuery<User> query = ParseQuery.getQuery("_User");
query.whereEqualTo("username", ans.getAns_by());
query.getFirstInBackground(new GetCallback<User>() {
public void done(User user, ParseException e) {
// TODO Auto-generated method stub
if (e == null) {
img.DisplayImage(user.getprofile_pic_url(), thumbnail, false);
} else {
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
put your imageview as final dont make it global and you get image url from geturl() method, it is as defined by parse you can use below example
ParseFile fileObject = (ParseFile) object.get("image_file");
User user = new User();
user = (User) ParseUser.getCurrentUser();
user.setProfile_pic_url(fileObject.getUrl().toString());
user.saveInBackground();
update
last day i found new solution you can get user's data which related to parse object by following code and made some changes in model class,too.
void getchats() {
pd.show();
ParseQuery<Parse_chat_dialogs> query = ParseQuery.getQuery("chat_dialogs");
query.addDescendingOrder("updatedAt");
query.whereContains("users", ParseUser.getCurrentUser().getUsername());
query.findInBackground(new FindCallback<Parse_chat_dialogs>() {
public void done(List<Parse_chat_dialogs> dilogs, ParseException e) {
if (e == null) {
pd.hide();
dialoglist = (ArrayList<Parse_chat_dialogs>) dilogs;
adp = new ChatDialogAdapter(Chat_list.this, dialoglist);
list.setAdapter(adp);
for (int i = 0; i < dialoglist.size(); i++) {
ParseQuery<User> query = ParseQuery.getQuery("_User");
query.whereEqualTo("username", dialoglist.get(i).getUsers().trim()
.replace(ParseUser.getCurrentUser().getUsername(), "").replace(",", ""));
User user = new User();
try {
user = query.getFirst();
dialoglist.get(i).setFirstname(user.getFirstname());
dialoglist.get(i).setLastname(user.getLastname());
dialoglist.get(i).setProfileurl(user.getprofile_pic_url());
adp.notifyDataSetChanged();
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
} else {
Toast.makeText(Chat_list.this, e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
}
as in above example i added three new param in parseobejct model class for storing values of user's firstname ,lastname and profile url.
i am also sharing model class for getting more idea
#ParseClassName("chat_dialogs")
public class Parse_chat_dialogs extends ParseObject {
private String firstname;
private String lastname;
private String profileurl;
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getProfileurl() {
return profileurl;
}
public void setProfileurl(String profileurl) {
this.profileurl = profileurl;
}
/////////////////////////////////////////////////////////////////////////////
public String getLast_message() {
return getString("last_message");
}
public void setLast_message(String value) {
put("last_message", value);
}
public String getUsers() {
return getString("users");
}
public void setUsers(String value) {
put("users", value);
}
}

How about this!
Instead of using AsyncTask in the adapter class, use it in the MainActivity where you set the adapter for the listview. And in your done method in the Callback or the postExecute update the object/objects and call notifyDataSetChanged().
So, essentially you could have an update method in your adapter class, say, like this,
public void updateObject(int pos, byte[] byteArray){
//Assuming your Profile Object has some member to store this image data
friends.get(pos).setImageData(byteArray); //friends is the list in adapter class and setImageData may be the setter in your Profile object class
notifyDataSetChanged();
}
and in the getView(), you could do something like this
profileImageBitmap = BitmapManager
.getBitmapFromByteArray(friends.get(pos).getImageData);
friendImage.setImageBitmap(profileImageBitmap);