Develop Reference

SearchData Method resets query? Firebase Database Android

In general, the thing is, I have three fragments. In the second snippet, it gets the data provided, here's the code.
1)MyPostFragment.class
public class MyPostsFragment extends PostListFragment {
public MyPostsFragment() {}
#Override
public Query getQuery(DatabaseReference databaseReference) {
return databaseReference.child("songsDB")
.orderByChild("stars/" + getUid())
.equalTo(true);
}
2)PostListFragment
public abstract class PostListFragment extends Fragment {
private DatabaseReference mDatabase;
private FirebaseRecyclerAdapter mAdapter;
private RecyclerView mRecycler;
private Activity mActivity;
Query mRef;
SearchView searchView;
LinearLayoutManager mManager;
FirebaseDatabase mFirebaseDatabase;
public PostListFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View rootView = inflater.inflate(R.layout.fragment_all_posts, container, false);
mRecycler = rootView.findViewById(R.id.messages_list);
mRecycler.setHasFixedSize(true);
mDatabase = FirebaseDatabase.getInstance().getReference();
return rootView;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setHasOptionsMenu(true);
// Set up Layout Manager, reverse layout
mManager = new LinearLayoutManager(getActivity());
mManager.setReverseLayout(true);
mManager.setStackFromEnd(true);
mRecycler.setLayoutManager(mManager);
Query postsQuery = getQuery(mDatabase);
ShowData(postsQuery);
}
#Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_main, menu);
MenuItem item = menu.findItem(R.id.action_search);
searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
SearchData(query);
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
//Filter as you type
SearchData(newText);
return false;
}
});
super.onCreateOptionsMenu(menu,inflater);
}
private FirebaseRecyclerAdapter getMAdapter(Query query){
mActivity = getActivity();
final Dialog mDialog = new Dialog(mActivity, R.style.NewDialog);
mDialog.addContentView(
new ProgressBar(mActivity),
new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT)
);
mDialog.setCancelable(true);
mDialog.show();
FirebaseRecyclerOptions<Post> options = new FirebaseRecyclerOptions.Builder<Post>()
.setQuery(query, Post.class)
.build();
mAdapter = new FirebaseRecyclerAdapter<Post, PostViewHolder>(options) {
#Override
protected void onBindViewHolder(PostViewHolder viewHolder, int position, final Post model) {
final DatabaseReference postRef = getRef(position);
// Determine if the current user has liked this post and set UI accordingly
if (model.stars.containsKey(getUid())) {
viewHolder.starView.setImageResource(R.drawable.ic_toggle_star_24);
} else {
viewHolder.starView.setImageResource(R.drawable.ic_toggle_star_outline_24);
}
if (!TextUtils.isEmpty(model.kzSongytblink))
viewHolder.mImage.setImageResource(R.drawable.on_line_logo);
else viewHolder.mImage.setImageResource(R.drawable.off_line_logo);
// Bind Post to ViewHolder, setting OnClickListener for the star button
viewHolder.bindToPost(model, new View.OnClickListener() {
#Override
public void onClick(View starView) {
// Need to write to both places the post is stored
DatabaseReference globalPostRef = mDatabase.child("songsDB").child(postRef.getKey());
// Run two transactions
onStarClicked(globalPostRef);
}
});
viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(mActivity, PostDetailActivity.class);
intent.putExtra(PostDetailActivity.EXTRA_POST_KEY, postRef.getKey());
startActivity(intent);
}
});
}
#Override
public PostViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
return new PostViewHolder(inflater.inflate(R.layout.item_post, viewGroup, false));
}
};
return mAdapter;
}
public void ShowData(Query postsQuery) {
mAdapter=getMAdapter(postsQuery);
mRecycler.setAdapter(mAdapter);
}
public void SearchData(String searchText){
//SearchData
mFirebaseDatabase = FirebaseDatabase.getInstance();
mRef = FirebaseDatabase.getInstance().getReference("songsDB");
Query postsQuery= mRef.orderByChild("kzSongTitle").startAt(searchText).endAt(searchText + "\uf8ff");
mAdapter=getMAdapter(postsQuery);
mRecycler.setAdapter(mAdapter);
}
#Override
public void onStart() {
super.onStart();
if (mAdapter != null) {
mAdapter.startListening();
}
}
#Override
public void onStop() {
super.onStop();
if (mAdapter != null) {
mAdapter.stopListening();
}
}
private void onStarClicked(DatabaseReference postRef) {
postRef.runTransaction(new Transaction.Handler() {
#Override
public Transaction.Result doTransaction(MutableData mutableData) {
Post p = mutableData.getValue(Post.class);
if (p == null) {
return Transaction.success(mutableData);
}
if (p.stars.containsKey(getUid())) {
// Unstar the post and remove self from stars
p.starCount = p.starCount - 1;
p.stars.remove(getUid());
} else {
// Star the post and add self to stars
p.starCount = p.starCount + 1;
p.stars.put(getUid(), true);
}
// Set value and report transaction success
mutableData.setValue(p);
return Transaction.success(mutableData);
}
#Override
public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) {
Log.d("postTransaction", "onComplete:" + dataSnapshot.getKey());
}
});
}
public String getUid() {
return FirebaseAuth.getInstance().getCurrentUser().getUid();
}
public abstract Query getQuery(DatabaseReference databaseReference);
}
If you remove the SearchData method, everything is loaded normally, but the searching is not working and I need it.
Without method SearchData :
If you don't remove SearchData load all data from database in all fragments.
I need to fix it, but I don't know how. Help me please.
With method SearchData :

Trying to call method from MainActivity in Another Activity it is me leading to error

I have Recycler ListView which I show in MainActivity and the first item it is as selected, I have done to click for another items but the last stays clicked and when I try to take this recycler view to show me in next Activity it doesn't work.
The first item it is selected but I have a click method which when click an image makes as selected but when I click a new image this works but the first item stays as selected so continues for others images. I want only a image to be selected.
I don't want to write twice the same code.
Is it good if I have a class only for this method which I can use everytime I want.
The id of recycler view list it is the same on both xml's.
If you have any suggestion for my question please let me know.
This is the adapter for the RecyclerView.
public class ListViewAdapter extends RecyclerView.Adapter<ListViewAdapter.ViewHolder>{
private int selectedItem;
private ArrayList<Integer> mImages = new ArrayList<>();
private ArrayList<String> mSearchUrl = new ArrayList<>();
private Context mContext;
public ListViewAdapter(ArrayList<Integer> images, ArrayList<String> SearchUrl, Context context) {
mImages = images;
mContext = context;
mSearchUrl = SearchUrl;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.s_engine_item, viewGroup, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final ViewHolder viewHolder, final int i) {
selectedItem = 0;
if (selectedItem == i) {
viewHolder.image.setBackgroundColor(Color.parseColor("#30000000"));
}
Glide.with(mContext).load(mImages.get(i))
.into(viewHolder.image);
viewHolder.searchUrl.setText(mSearchUrl.get(i));
viewHolder.image.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
viewHolder.image.setBackgroundColor(Color.parseColor("#30000000"));
selectedItem = i;
}
});
}
#Override
public int getItemCount() {
return mImages.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
ImageView image;
TextView searchUrl;
public ViewHolder(#NonNull View itemView) {
super(itemView);
image = itemView.findViewById(R.id.ivEngine);
searchUrl = itemView.findViewById(R.id.ivEngineText);
}
}
}
This is the method in MainActivity.class
public void intSearch() {
mImages.add(R.drawable.s_bing);
mSearchUrl.add("https://www.bing.com/search?q=");
mImages.add(R.drawable.s_google);
mSearchUrl.add("https://www.google.com/search?q=");
mImages.add(R.drawable.s_yahoo);
mSearchUrl.add("www.yahoo.com");
mImages.add(R.drawable.amazon_white256);
mSearchUrl.add("www.amazon.com");
mImages.add(R.drawable.amazon_white256);
mSearchUrl.add("www.amazon.com");
mImages.add(R.drawable.amazon_white256);
mSearchUrl.add("www.amazon.com");
initRecyclerView();
}
private void initRecyclerView() {
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
RecyclerView recyclerView = findViewById(R.id.lvEngines);
recyclerView.setLayoutManager(layoutManager);
ListViewAdapter adapter = new ListViewAdapter(mImages, mSearchUrl, this);
recyclerView.setAdapter(adapter);
}
This is the button which takes to another activity.
btnSearch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String newEntry = searchPlugin.getText().toString();
Cursor data = mDatabaseHelper.getData();
AddHistory(newEntry);
getFragmentRefreshListener().onRefresh();
Intent intent = new Intent(MainActivity.this, ActivitySearchEngine.class);
intent.putExtra("name", newEntry);
intent.putExtra("test", mSearchUrl.get(0));
startActivityForResult(intent, 2);
}
});
This is the another activity
public class ActivitySearchEngine extends Activity implements
SwipeRefreshLayout.OnRefreshListener {
public ImageView mHome;
public EditText searchPlugin;
public WebView webView;
Button btnSearch;
public ImageButton clearSearch, exitButton;
public ImageView favIcon;
public ProgressBar loadIcon;
String text;
SwipeRefreshLayout refreshLayout;
DatabaseHelper mDatabaseHelper;
private String selectedName;
private int selectedID;
private String selectedSearchUrl;
RecyclerView mListView;
MainActivity mainActivity = new MainActivity();
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_result);
mHome = findViewById(R.id.imgBtnHome);
searchPlugin = findViewById(R.id.etSearch);
webView = findViewById(R.id.webView);
clearSearch = findViewById(R.id.btnClearSearch);
btnSearch = findViewById(R.id.btnSearch);
favIcon = findViewById(R.id.imgViewFavIcon);
loadIcon = findViewById(R.id.progressBarIcon);
exitButton = findViewById(R.id.imgBtnStopLoad);
refreshLayout = findViewById(R.id.refreshLayout);
mListView = findViewById(R.id.lvEngines);
refreshLayout.setOnRefreshListener(this);
mDatabaseHelper = new DatabaseHelper(this);
mainActivity.intSearch(); // Here it is the error
Activity.ActivitySearchEngine}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.Window$Callback android.view.Window.getCallback()' on a null object reference
Intent receivedIntent = getIntent();
selectedName = receivedIntent.getStringExtra("name");
selectedID = receivedIntent.getIntExtra("id",-1); //NOTE: -1 is just the default value
selectedSearchUrl = receivedIntent.getStringExtra("test");
searchPlugin.setText(selectedName);
loadIcon.setVisibility(View.VISIBLE);
webView.setWebViewClient(new WebViewClient());
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl("www.bing.com/search?=" + selectedName);
webView.setWebChromeClient(new WebChromeClient() {
#Override
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
}
#Override
public void onReceivedIcon(WebView view, Bitmap icon) {
super.onReceivedIcon(view, icon);
favIcon.setImageBitmap(icon);
}
});
webView.setWebViewClient(new WebViewClient() {
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
loadIcon.setVisibility(View.VISIBLE);
favIcon.setVisibility(View.GONE);
}
public void onPageFinished(WebView view, String url) {
try {
if (loadIcon.getVisibility() == View.VISIBLE) {
loadIcon.setVisibility(View.GONE);
favIcon.setVisibility(View.VISIBLE);
btnSearch.setVisibility(View.GONE);
mHome.setVisibility(View.VISIBLE);
exitButton.setVisibility(View.GONE);
clearSearch.setVisibility(View.VISIBLE);
favIcon.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
onRefresh();
}
});
}
} catch (Exception exception) {
exception.printStackTrace();
}
}
});
searchPlugin.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
#Override
public void afterTextChanged(Editable s) {
processButtonByTextLength();
}
});
mHome.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
searchPlugin.setText(null);
finish();
}
});
clearSearch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
searchPlugin.setText("");
}
});
public void processButtonByTextLength() {
String inputText = searchPlugin.getText().toString();
if(inputText.length() > 0) {
btnSearch.setVisibility(View.VISIBLE);
mHome.setVisibility(View.GONE);
clearSearch.setVisibility(View.VISIBLE);
favIcon.setVisibility(View.VISIBLE);
loadIcon.setVisibility(View.GONE);
exitButton.setVisibility(View.GONE);
} else if(inputText.length() == 0) {
btnSearch.setVisibility(View.GONE);
mHome.setVisibility(View.VISIBLE);
clearSearch.setVisibility(View.GONE);
}
}
#Override
public void onRefresh() {
webView.reload();
refreshLayout.setRefreshing(false);
}
}
This is the photo with RecyclerView at MainActivity.class
Photo of another Activity

Update TAB 2 Recyclerview When Data Added in TAB 1's RecyclerView

I have kind of to-do app. In profile activity, there are 2 tabs.
To-do and Done. In Tab 1, user can check as "done" of their "to-do". In this case, I want to update TAB 2's recyclerview.
I tried several things, but didn't work. Here is TAB 1 codes, it's almost same as TAB 2.
TAB 1 Class
public class Tab_Profile_1 extends Fragment {
private RecyclerView recyclerView_tab_todo;
private List<Model_ListItem> itemList;
private Adapter_Profile_ToDo adapter_profile_toDo;
SharedPreferences mSharedPref;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_profile_tab_1, container, false);
//TO-DO
//
recyclerView_tab_todo = view.findViewById(R.id.recyclerView_tab_todo);
//
fetchUserToDo();
return view;
}
public void fetchUserToDo() {
itemList = new ArrayList<>();
//First Settings
mSharedPref = PreferenceManager.getDefaultSharedPreferences(getContext());
String session_user_id = mSharedPref.getString("session_user_id", "");
API_Service api_service = Client.getRetrofitInstance().create(API_Service.class);
Call<List<Model_ListItem>> call = api_service.fetchUserToDo(session_user_id);
call.enqueue(new Callback<List<Model_ListItem>>() {
#Override
public void onResponse(Call<List<Model_ListItem>> call, Response<List<Model_ListItem>> response) {
itemList = response.body();
adapter_profile_toDo = new Adapter_Profile_ToDo(getContext(), itemList);
recyclerView_tab_todo.setHasFixedSize(true);
LinearLayoutManager layoutManager
= new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false);
recyclerView_tab_todo.setLayoutManager(layoutManager);
recyclerView_tab_todo.setAdapter(adapter_profile_toDo);
}
#Override
public void onFailure(Call<List<Model_ListItem>> call, Throwable t) {
}
});
}}
TAB 1 RecyclerView Adapter
public class Adapter_Profile_ToDo extends RecyclerView.Adapter {
private Context context;
private List<Model_ListItem> itemList;
private String url_extension_images = URL_Extension.url_extension_images;
SharedPreferences mSharedPref;
ProgressDialog progressDialog;
View view;
public Adapter_Profile_ToDo(Context context, List<Model_ListItem> itemList) {
this.context = context;
this.itemList = itemList;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_profile_todo, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, final int position) {
Glide.with(context).load(url_extension_images + itemList.get(position).getItem_image()).into(holder.imageView_profile_todo);
holder.textView_profile_todo_name.setText(itemList.get(position).getItem_name());
holder.textView_profile_todo_desc.setText(itemList.get(position).getItem_description());
holder.layout_profile_todo_detail.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//detail
}
});
holder.layout_profile_todo_add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final AlertDialog.Builder builder = new AlertDialog.Builder(view.getRootView().getContext(), R.style.AlertStyle);
builder.setTitle("\"" + itemList.get(position).getItem_name() + "\"" + "\n");
builder.setIcon(R.drawable.ic_bookmark);
builder.setPositiveButton("YAPTIM", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
showProgressDialog();
addDone("" + itemList.get(position).getItem_id(), position);
}
});
builder.setNegativeButton("SİL", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
showProgressDialog();
deleteUserToDo("" + itemList.get(position).getItem_id(), position);
}
});
builder.setNeutralButton("İptal", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.show();
}
});
}
#Override
public int getItemCount() {
return itemList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView imageView_profile_todo;
TextView textView_profile_todo_name, textView_profile_todo_desc;
LinearLayout layout_profile_todo_detail, layout_profile_todo_add;
public ViewHolder(View itemView) {
super(itemView);
imageView_profile_todo = itemView.findViewById(R.id.imageView_profile_todo);
textView_profile_todo_name = itemView.findViewById(R.id.textView_profile_todo_name);
textView_profile_todo_desc = itemView.findViewById(R.id.textView_profile_todo_desc);
layout_profile_todo_detail = itemView.findViewById(R.id.layout_profile_todo_detail);
layout_profile_todo_add = itemView.findViewById(R.id.layout_profile_todo_add);
}
}
public void deleteUserToDo(final String listId, final int clicked) {
mSharedPref = PreferenceManager.getDefaultSharedPreferences(context);
String session_user_id = mSharedPref.getString("session_user_id", "");
API_Service api_service = Client.getRetrofitInstance().create(API_Service.class);
Call<Response_Success> call = api_service.deleteUserToDo(session_user_id, listId);
call.enqueue(new Callback<Response_Success>() {
#Override
public void onResponse(Call<Response_Success> call, Response<Response_Success> response) {
if (response.code() == 200) {
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
if (response.body().getSuccess().matches("true")) {
Toast.makeText(context, "Silindi!", Toast.LENGTH_SHORT).show();
itemList.remove(itemList.get(clicked));
notifyItemRemoved(clicked);
notifyItemRangeChanged(clicked, itemList.size());
} else {
Toast.makeText(context, "Bilinmeyen bir hata oluştu!", Toast.LENGTH_SHORT).show();
}
}
}
#Override
public void onFailure(Call<Response_Success> call, Throwable t) {
Toast.makeText(context, "Bilinmeyen bir hata oluştu!", Toast.LENGTH_SHORT).show();
}
});
}
public void addDone(String listId, final int clicked) {
mSharedPref = PreferenceManager.getDefaultSharedPreferences(context);
String session_user_id = mSharedPref.getString("session_user_id", "");
API_Service apiService = Client.getRetrofitInstance().create(API_Service.class);
Call<Response_Success> call = apiService.addDone(session_user_id, listId);
call.enqueue(new Callback<Response_Success>() {
#Override
public void onResponse(Call<Response_Success> call, Response<Response_Success> response) {
if (response.code() == 200) {
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
if (response.body().getSuccess().matches("true")) {
Toast.makeText(context, "Eklendi", Toast.LENGTH_SHORT).show();
itemList.remove(itemList.get(clicked));
notifyItemRemoved(clicked);
notifyItemRangeChanged(clicked, itemList.size());
} else {
Toast.makeText(context, "Bilinmeyen bir hata oluştu!", Toast.LENGTH_SHORT).show();
}
}
}
#Override
public void onFailure(Call<Response_Success> call, Throwable t) {
}
});
}
public void showProgressDialog() {
progressDialog = new ProgressDialog(view.getRootView().getContext());
progressDialog.setMessage("Yükleniyor");
progressDialog.setCancelable(false);
progressDialog.show();
}
}

If i'm reading this correctly, you have two tabs and a backend database that stores the to do items and their state? To get the second list to update, you just need to do the same thing that you're doing in your first list, and update the adapter's data set and notify that the data set changed. How you trigger this action in your second tab is really the question.
You can either use an interface and have your adapter notify your activity that recycler view 1 had an action on it, and you can then tell adapter 2 to update its data. You can either pass back the data and only notify one row, or you could notify the entire data set. If you're doing this all service based, you could just reload the recycler view from the service and it will have the new data.
I think all you need to figure out is how you want to notify tab 2 that it needs to update its data. My recommendation is:
public interface AdapterInterface
{
void itemCompleted(Item hereIsTheItemThatNeedsToBeAddedTo2);
}
Then inside your adapter have a property with getters/setters such as:
private AdapterInterface adapterInterfaceListener;
Inside your Fragment/Activity implement AdapterInterface and implement the itemCompleted function.
And then set your adapter.setAdapterInterfaceLisetener to that function that you implemented. Then inside your adapter when the user clicks the checkbook to mark it as done, you can call the adapterInterfaceListener.itemCompleted() function, and it will send that information to your Fragment/Activity. From there you can give that new data to adapter2, or recall the API, however you want to get the new data.
Does this help?

Firebase and Android - Chat Message and OnClickListener

I learn Firebase and I found this project: https://github.com/firebase/FirebaseUI-Android/tree/0.3.1/codelabs/chat
I'm trying to expand this project for setOnClickListener method.
I would like to click on every item of this chat message(chat listview) and see
this in another activity.
For example: I have this chat in: ChatMessageActivity. And I would like show this in ChatMessageDetailsActivity.
Like this:
private Firebase firebaseRef;
private static final String FIREBASE_URL = "https://my-project.firebaseio.com/chat";
FirebaseListAdapter listAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat_message);
Firebase.setAndroidContext(this);
firebaseRef = new Firebase(FIREBASE_URL);
final EditText mText = (EditText) findViewById(R.id.messageText);
Button sendButton = (Button) findViewById(R.id.sendButton);
sendButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String text = mText.getText().toString();
ChatMessage message = new ChatMessage("Android User", text);
firebaseRef.push().setValue(message);
mText.setText("");
}
});
final ListView listView = (ListView) this.findViewById(R.id.list);
listAdapter = new FirebaseListAdapter<ChatMessage>(this, ChatMessage.class,
android.R.layout.two_line_list_item, firebaseRef) {
#Override
protected void populateView(View v, ChatMessage model, int position) {
((TextView)v.findViewById(android.R.id.text1)).setText(model.getName());
((TextView)v.findViewById(android.R.id.text2)).setText(model.getText());
}
};
listView.setAdapter(listAdapter);
firebaseRef.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
}
public void onChildChanged(DataSnapshot dataSnapshot, String s) { }
public void onChildRemoved(DataSnapshot dataSnapshot) { }
public void onChildMoved(DataSnapshot dataSnapshot, String s) { }
public void onCancelled(FirebaseError firebaseError) { }
});
}
#Override
public View getView(View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder = null;
if ( row == null || (row.getTag() == null)) {
holder = new ViewHolder();
holder.chatName = (TextView) row.findViewById(R.id.detsName);
holder.chatText = (TextView) row.findViewById(R.id.detsText);
row.setTag(holder);
}else {
holder = (ViewHolder) row.getTag();
}
holder.chatName.setText(holder.chatMessage.getName());
holder.chatText.setText(holder.chatMessage.getText());
final ViewHolder finalHolder = holder;
row.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(ChatMessage.this, ChatMessageDetails.class);
startActivity(i);
}
});
return row;
}
public class ViewHolder {
ChatMessage chatMessage;
TextView chatName;
TextView chatText;
}
#Override
protected void onDestroy() {
super.onDestroy();
listAdapter.cleanup();
}
}
But getView(at the bottom) method doesn't work. I had this in my old project without Firebase and internet connection. It worked. But now I'm trying to implement this in Chat Project but without positive results.
Is in Firebase some inside method to do this?
Does somebody has some preposition how to develop this listView with SetOnClickListener method with Firebase in AndroidStudio?

Android - Why RAM usage continues to increase after fragment replace?

I am using NavigationDrawer and replace fragments like this:
ft.setCustomAnimations(
android.R.anim.slide_in_left, android.R.anim.slide_out_right
);
ft.replace(container, fragment);
// Start the animated transition.
ft.commit();
When Application start and First fragment is loaded, allocation heap is ~15 MB.
After I replace first fragment with second and doing some work, allocation heap ~40MB.
Then I replace second fragment with third, allocation heap maintains at ~40MB ( if force garbage collection) allocation heap decreases by ~7 mb.
If, I will not load second fragment and will go to third from first, allocation heap will maintain at ~17 MB.
Is second fragment destroyed at all, and if it is destroyed, why memmory is not freed?
As I understand without addToBackStack() fragments are not added to back stack and should be destroyed after removing ( as replace call remove and add)
Second fragment is basicly a listview
public class ArtistListFragment extends Fragment {
private FragmentArtistAdapter adapter;
private static final List<ArtistsEntity> articles = new ArrayList<>();
private GetAdds feed = new GetAdds();
private GridView list;
private String request = "new";
private ToggleButton tbLeft;
private ToggleButton tbRight;
private ToggleButton tbAbc;
public ArtistListFragment() {
// Required empty public constructor
}
private Tracker t;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
t = ((UILApplication) getActivity().getApplication()).getTracker();
t.setScreenName("Artist List Screen");
t.send(new HitBuilders.EventBuilder()
.setCategory("Open Screen")
.build());
t.send(new HitBuilders.EventBuilder()
.setCategory("view")
.setAction("choose")
.setLabel("new")
.build());
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_artist_list, container, false);
setSwipeLayout(view);
eVideoScroll.resetState();
adapter = new FragmentArtistAdapter(getActivity(), articles);
list = (GridView) view.findViewById(R.id.gridview);
tbLeft = (ToggleButton) view.findViewById(R.id.tb_left);
tbRight = (ToggleButton) view.findViewById(R.id.tb_right);
tbAbc = (ToggleButton) view.findViewById(R.id.tb_abc);
tbLeft.setOnCheckedChangeListener(leftListener);
tbRight.setOnCheckedChangeListener(rightListener);
tbAbc.setOnCheckedChangeListener(abcListener);
tbLeft.setClickable(false);
list.setAdapter(adapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
BusProvider.getInstance().post(new OpenArtistInfo(
articles.get(position)
.getSlug()));
}
});
feed = new GetAdds();
feed.execute();
list.setOnScrollListener(eVideoScroll);
return view;
}
private SwipeRefreshLayout swipeLayout;
private void setSwipeLayout(View view) {
swipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_container);
swipeLayout.setOnRefreshListener(refreshPage);
swipeLayout.setColorSchemeResources(android.R.color.holo_blue_bright,
android.R.color.holo_green_light,
android.R.color.holo_orange_light,
android.R.color.holo_red_light);
}
private final SwipeRefreshLayout.OnRefreshListener refreshPage = new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
new ResetVideoSelection().execute();
}
};
boolean checkInternetConnection() {
ConnectivityManager cm = (ConnectivityManager) getActivity()
.getSystemService(Context.CONNECTIVITY_SERVICE);
// test for connection
if (cm.getActiveNetworkInfo() != null
&& cm.getActiveNetworkInfo().isAvailable()
&& cm.getActiveNetworkInfo().isConnected()) {
return true;
} else {
AlertDialog alertDialog = new AlertDialog.Builder(getActivity()).create();
alertDialog.setTitle(getString(R.string.no_internet_conection));
alertDialog
.setMessage(getString(R.string.open_network_settings));
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, getString(R.string.yes_response),
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(
Settings.ACTION_WIRELESS_SETTINGS);
startActivity(intent);
}
});
alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, getString(R.string.no_response),
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.setIcon(R.drawable.ic_launcher);
alertDialog.show();
return false;
}
}
void emptyResultDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage(ErrorMessage.INSTANCE.getErrorMessage())
.setCancelable(false)
.setPositiveButton(R.string.close_response,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
});
Dialog dialog = builder.create();
dialog.show();
}
private class GetAdds extends AsyncTask<Void, Void, List<ArtistsEntity>> {
#Override
protected void onPreExecute() {
if (!checkInternetConnection()) {
swipeLayout.setRefreshing(true);
cancel(true);
eVideoScroll.loading = false;
} else {
if (!swipeLayout.isRefreshing())
swipeLayout.setRefreshing(true);
}
}
#Override
protected List<ArtistsEntity> doInBackground(Void... params) {
int trial = 0;
MaterialRequest jParse = new MaterialRequest();
List<ArtistsEntity> result = null;
int page = PaggingData.INSTANCE.artistListCurrentPage + 1;
while (result == null && trial < 5 && !isCancelled()) {
trial++;
result = jParse.getArtists(request, page);
}
return result;
}
#Override
protected void onPostExecute(List<ArtistsEntity> result) {
super.onPostExecute(result);
if (result != null && result.size() > 0) {
if (PaggingData.INSTANCE.artistListCurrentPage <= 1)
articles.clear();
articles.addAll(result);
adapter.notifyDataSetChanged();
} else
emptyResultDialog();
eVideoScroll.loading = false;
swipeLayout.setRefreshing(false);
}
}
private final CompoundButton.OnCheckedChangeListener leftListener = new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
request = "new";
new ResetVideoSelection().execute();
tbRight.setChecked(false);
tbAbc.setChecked(false);
tbLeft.setClickable(false);
t.send(new HitBuilders.EventBuilder()
.setCategory("view")
.setAction("choose")
.setLabel("new")
.build());
} else {
tbLeft.setClickable(true);
}
}
};
private final CompoundButton.OnCheckedChangeListener rightListener = new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
request = "popular";
new ResetVideoSelection().execute();
tbLeft.setChecked(false);
tbAbc.setChecked(false);
tbRight.setClickable(false);
t.send(new HitBuilders.EventBuilder()
.setCategory("view")
.setAction("choose")
.setLabel("popular")
.build());
} else {
tbRight.setClickable(true);
}
}
};
private final CompoundButton.OnCheckedChangeListener abcListener = new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (isChecked) {
request = "abc";
new ResetVideoSelection().execute();
tbRight.setChecked(false);
tbLeft.setChecked(false);
tbAbc.setClickable(false);
t.send(new HitBuilders.EventBuilder()
.setCategory("view")
.setAction("choose")
.setLabel("abc")
.build());
} else {
tbAbc.setClickable(true);
}
}
};
private class ResetVideoSelection extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
eVideoScroll.resetState();
list.setSelection(0);
}
#Override
protected Void doInBackground(Void... params) {
// if (videoArticles.size() > 0)
// while (listVideo.getSelectedItemPosition() != 0) {
//
// }
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
feed = new GetAdds();
feed.execute();
}
}
private final EndlessVideoScrollListener eVideoScroll = new EndlessVideoScrollListener();
private class EndlessVideoScrollListener implements AbsListView.OnScrollListener {
private int visibleThreshold = 5;
private int previousTotal = 0;
private boolean loading = true;
public void resetState() {
visibleThreshold = 5;
previousTotal = 0;
loading = true;
PaggingData.INSTANCE.artistListPages = 0;
PaggingData.INSTANCE.artistListCurrentPage = 0;
}
public EndlessVideoScrollListener() {
}
public EndlessVideoScrollListener(int visibleThreshold) {
this.visibleThreshold = visibleThreshold;
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if (loading) {
if (totalItemCount > previousTotal) {
// loading = false;
previousTotal = totalItemCount;
}
}
if (!loading
&& (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold)) {
// I load the next page of gigs using a background task,
// but you can call any function here.
if (PaggingData.INSTANCE.artistListCurrentPage + 1 <= PaggingData.INSTANCE.artistListPages) {
feed = new GetAdds();
feed.execute();
loading = true;
}
}
}
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
}
#Override
public void onPause() {
super.onPause();
feed.cancel(true);
swipeLayout.setRefreshing(false);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((NavigationDrawerActivity) activity).onSectionAttached(getArguments().getString("title"));
}
}

Indeed, Fragments are destroyed and created anew as they shift in and out of view (unlike Activitys), provided addToBackStack() is not used.
I suspect that
1. You have set android:largeHeap = true in your app manifest.
2. Your Fragments are possibly making use of heavy ImageViews / VideoViews or cached Bitmaps with static references, which can also be a cause of unrestricted heap growth.
These are some reasons off the top of my head that I can think of in a situation like this.