private void getPosts() {
Firebase database = new Firebase("https://vivid-heat-3338.firebaseio.com/");
Query query;
if (spinnerdisplaydisplay.equals("recent")) {
query = database.orderByChild("timestamp").limitToLast(55);
} else {
query = database.orderByChild("votes").limitToFirst(55);
}
// Attach an listener to read the data at our posts reference
query.addListenerForSingleValueEvent(
new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot snapshot) {
aList.clear();
for (DataSnapshot postSnapshot : snapshot.child("posts").getChildren()) {
final Post post = postSnapshot.getValue(Post.class);
aList.add(
0,
new PostElement(
post.getContent(),
(String)
snapshot
.child("users")
.child(post.getUser_id())
.child("profilePic")
.getValue(),
(String)
snapshot
.child("users")
.child(post.getUser_id())
.child("userName")
.getValue(),
post.getTimestamp(),
String.valueOf(post.getVotes()),
post.getPost_id()));
adapter.notifyDataSetChanged();
}
}
@Override
public void onCancelled(FirebaseError firebaseError) {
System.out.println("The read failed: " + firebaseError.getMessage());
}
});
}
@Override
protected void onStart() {
super.onStart();
final ListView mainList = (ListView) findViewById(R.id.main_list);
listAdapter =
new FriendFoodBoxItemListAdapter(
usersRef.orderByChild("expirationDate"), this, R.layout.food_friend_view, userName);
mainList.setAdapter(listAdapter);
}
@Override
public Comment[] getCommentsOnPost(String postId) {
Query query = commentsFirebaseRef.orderByChild("postId").equalTo(postId);
return executeCommentQuerySynchronously(query);
}
@Override
public Comment[] getCommentsByUser(String authorId) {
Query query = commentsFirebaseRef.orderByChild("authorId").equalTo(authorId);
return executeCommentQuerySynchronously(query);
}
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_active_list_details);
/* Get the push ID from the extra passed by ShoppingListFragment */
Intent intent = this.getIntent();
mListId = intent.getStringExtra(Constants.KEY_LIST_ID);
if (mListId == null) {
/* No point in continuing without a valid ID. */
finish();
return;
}
/** Create Firebase references */
mCurrentListRef =
new Firebase(Constants.FIREBASE_URL_USER_LISTS).child(mEncodedEmail).child(mListId);
mCurrentUserRef = new Firebase(Constants.FIREBASE_URL_USERS).child(mEncodedEmail);
mSharedWithRef = new Firebase(Constants.FIREBASE_URL_LISTS_SHARED_WITH).child(mListId);
Firebase listItemsRef = new Firebase(Constants.FIREBASE_URL_SHOPPING_LIST_ITEMS).child(mListId);
/** Link layout elements from XML and setup the toolbar */
initializeScreen();
/** Setup the adapter */
mActiveListItemAdapter =
new ActiveListItemAdapter(
this,
ShoppingListItem.class,
R.layout.single_active_list_item,
listItemsRef.orderByChild(Constants.FIREBASE_PROPERTY_BOUGHT_BY),
mListId,
mEncodedEmail);
/* Create ActiveListItemAdapter and set to listView */
mListView.setAdapter(mActiveListItemAdapter);
/**
* Add ValueEventListeners to Firebase references to control get data and control behavior and
* visibility of elements
*/
/* Save the most up-to-date version of current user in mCurrentUser */
mCurrentUserRefListener =
mCurrentUserRef.addValueEventListener(
new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
User currentUser = dataSnapshot.getValue(User.class);
if (currentUser != null) mCurrentUser = currentUser;
else finish();
}
@Override
public void onCancelled(FirebaseError firebaseError) {
Log.e(
LOG_TAG,
getString(R.string.log_error_the_read_failed) + firebaseError.getMessage());
}
});
final Activity thisActivity = this;
/**
* Save the most recent version of current shopping list into mShoppingList instance variable an
* update the UI to match the current list.
*/
mCurrentListRefListener =
mCurrentListRef.addValueEventListener(
new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot snapshot) {
/**
* Saving the most recent version of current shopping list into mShoppingList if
* present finish() the activity if the list is null (list was removed or unshared
* by it's owner while current user is in the list details activity)
*/
ShoppingList shoppingList = snapshot.getValue(ShoppingList.class);
if (shoppingList == null) {
finish();
/**
* Make sure to call return, otherwise the rest of the method will execute, even
* after calling finish.
*/
return;
}
mShoppingList = shoppingList;
/**
* Pass the shopping list to the adapter if it is not null. We do this here because
* mShoppingList is null when first created.
*/
mActiveListItemAdapter.setShoppingList(mShoppingList);
/* Check if the current user is owner */
mCurrentUserIsOwner = Utils.checkIfOwner(shoppingList, mEncodedEmail);
/* Calling invalidateOptionsMenu causes onCreateOptionsMenu to be called */
invalidateOptionsMenu();
/* Set title appropriately. */
setTitle(shoppingList.getListName());
HashMap<String, User> usersShopping = mShoppingList.getUsersShopping();
if (usersShopping != null
&& usersShopping.size() != 0
&& usersShopping.containsKey(mEncodedEmail)) {
mShopping = true;
mButtonShopping.setText(getString(R.string.button_stop_shopping));
mButtonShopping.setBackgroundColor(
ContextCompat.getColor(ActiveListDetailsActivity.this, R.color.dark_grey));
} else {
mButtonShopping.setText(getString(R.string.button_start_shopping));
mButtonShopping.setBackgroundColor(
ContextCompat.getColor(ActiveListDetailsActivity.this, R.color.primary_dark));
mShopping = false;
}
setWhosShoppingText(mShoppingList.getUsersShopping());
}
@Override
public void onCancelled(FirebaseError firebaseError) {
Log.e(
LOG_TAG,
getString(R.string.log_error_the_read_failed) + firebaseError.getMessage());
}
});
mSharedWithListener =
mSharedWithRef.addValueEventListener(
new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
mSharedWithUsers = new HashMap<String, User>();
for (DataSnapshot currentUser : dataSnapshot.getChildren()) {
mSharedWithUsers.put(currentUser.getKey(), currentUser.getValue(User.class));
}
mActiveListItemAdapter.setSharedWithUsers(mSharedWithUsers);
}
@Override
public void onCancelled(FirebaseError firebaseError) {
Log.e(
LOG_TAG,
getString(R.string.log_error_the_read_failed) + firebaseError.getMessage());
}
});
/** Set up click listeners for interaction. */
/* Show edit list item name dialog on listView item long click event */
mListView.setOnItemLongClickListener(
new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
/* Check that the view is not the empty footer item */
if (view.getId() != R.id.list_view_footer_empty) {
ShoppingListItem shoppingListItem = mActiveListItemAdapter.getItem(position);
if (shoppingListItem != null) {
/*
If the person is the owner and not shopping and the item is not bought, then
they can edit it.
*/
if (shoppingListItem.getOwner().equals(mEncodedEmail)
&& !mShopping
&& !shoppingListItem.isBought()) {
String itemName = shoppingListItem.getItemName();
String itemId = mActiveListItemAdapter.getRef(position).getKey();
showEditListItemNameDialog(itemName, itemId);
return true;
}
}
}
return false;
}
});
/* Perform buy/return action on listView item click event if current user is shopping. */
mListView.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
/* Check that the view is not the empty footer item */
if (view.getId() != R.id.list_view_footer_empty) {
final ShoppingListItem selectedListItem = mActiveListItemAdapter.getItem(position);
String itemId = mActiveListItemAdapter.getRef(position).getKey();
if (selectedListItem != null) {
/* If current user is shopping */
if (mShopping) {
/* Create map and fill it in with deep path multi write operations list */
HashMap<String, Object> updatedItemBoughtData = new HashMap<String, Object>();
/* Buy selected item if it is NOT already bought */
if (!selectedListItem.isBought()) {
updatedItemBoughtData.put(Constants.FIREBASE_PROPERTY_BOUGHT, true);
updatedItemBoughtData.put(Constants.FIREBASE_PROPERTY_BOUGHT_BY, mEncodedEmail);
} else {
/* Return selected item only if it was bought by current user */
if (selectedListItem.getBoughtBy().equals(mEncodedEmail)) {
updatedItemBoughtData.put(Constants.FIREBASE_PROPERTY_BOUGHT, false);
updatedItemBoughtData.put(Constants.FIREBASE_PROPERTY_BOUGHT_BY, null);
}
}
/* Do update */
Firebase firebaseItemLocation =
new Firebase(Constants.FIREBASE_URL_SHOPPING_LIST_ITEMS)
.child(mListId)
.child(itemId);
firebaseItemLocation.updateChildren(
updatedItemBoughtData,
new Firebase.CompletionListener() {
@Override
public void onComplete(FirebaseError firebaseError, Firebase firebase) {
if (firebaseError != null) {
Log.d(
LOG_TAG,
getString(R.string.log_error_updating_data)
+ firebaseError.getMessage());
}
}
});
}
}
}
}
});
}
// Obtiene e inicializa las vistas.
private void initVistas(View v) {
lblNuevoAlumno = (TextView) v.findViewById(R.id.lblNuevoAlumno);
lblNuevoAlumno.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
listener.onAgregarAlumno();
}
});
RecyclerView lstAlumnos = (RecyclerView) v.findViewById(R.id.lstAlumnos);
lstAlumnos.setHasFixedSize(true);
Firebase ref = new Firebase(App.getUidAlumnosUrl());
mAdaptador = new AlumnosAdapter(ref.orderByChild("nombre"));
mAdaptador.setOnItemClickListener(this);
mAdaptador.setOnItemLongClickListener(this);
mObservador =
new RecyclerView.AdapterDataObserver() {
@Override
public void onItemRangeInserted(int positionStart, int itemCount) {
super.onItemRangeInserted(positionStart, itemCount);
lblNuevoAlumno.setVisibility(mAdaptador.isEmpty() ? View.VISIBLE : View.INVISIBLE);
}
@Override
public void onItemRangeRemoved(int positionStart, int itemCount) {
super.onItemRangeRemoved(positionStart, itemCount);
lblNuevoAlumno.setVisibility(mAdaptador.isEmpty() ? View.VISIBLE : View.INVISIBLE);
}
@Override
public void onChanged() {
super.onChanged();
lblNuevoAlumno.setVisibility(mAdaptador.isEmpty() ? View.VISIBLE : View.INVISIBLE);
}
};
mAdaptador.registerAdapterDataObserver(mObservador);
lstAlumnos.setAdapter(mAdaptador);
mLayoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false);
lstAlumnos.setLayoutManager(mLayoutManager);
lstAlumnos.addItemDecoration(
new DividerItemDecoration(getActivity(), LinearLayoutManager.VERTICAL));
lstAlumnos.setItemAnimator(new DefaultItemAnimator());
// Drag & drop y Swipe to dismiss.
ItemTouchHelper itemTouchHelper =
new ItemTouchHelper(
new ItemTouchHelper.SimpleCallback(
ItemTouchHelper.UP | ItemTouchHelper.DOWN, ItemTouchHelper.RIGHT) {
@Override
public boolean onMove(
RecyclerView recyclerView,
RecyclerView.ViewHolder viewHolder,
RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
// Se elimina el elemento.
eliminarAlumno(viewHolder.getAdapterPosition());
}
});
itemTouchHelper.attachToRecyclerView(lstAlumnos);
// Hide / show FAB on scrolling.
mHidingScrollListener =
new HidingScrollListener() {
@Override
public void onHide() {
listener.onHideFAB();
}
@Override
public void onShow() {
listener.onShowFAB();
}
};
lstAlumnos.addOnScrollListener(mHidingScrollListener);
}
public void loadTemplatesFromDB(ChildEventListener listener) {
db = DBconn.getInstance().getFbConnection().child("Templates");
Query queryRef = db.orderByChild("name");
queryRef.addChildEventListener(listener);
}