Basically I have in my Parse database two columns "rank" and "rankCount" which are both numbers.
Rank represents the total rank of the item in that row and rankCount represents the number of people who ranked it.
What I'm trying to do is create a method which will sum the average between those two, make an Int out of the number(in case its a Double/Float) and display the corresponding number with stars in a RatingBar between 1-5 stars, inside a specified Fragment with a ListView in it.
Note: I don't want to make changes in the parse database because I'm using it for the iphone version of this app witch is already complete, but I'm having a more difficult time with android.
specific Fragment class:
public class RecommendedTab extends Fragment {
ListView recommendedListView;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View tab_recommended = inflater.inflate(R.layout.tab_recommended, container, false);
recommendedListView = (ListView)tab_recommended.findViewById(R.id.recommendedList);
ParseQuery<ParseObject> query = ParseQuery.getQuery("Place");
new RemoteDataTask(){
protected void onPostExecute(List<Places> places) {
recommendedListView.setAdapter(new PlacesAdapter(getActivity(), places, null));
}
}.execute(query);
return tab_recommended;
}
}
Adapter class:
public class PlacesAdapter extends BaseAdapter{
private List<Places> places=null;
private List<Places> filteredPlaces=null;
LayoutInflater inflater;
ImageLoader imageLoader;
private Context context;
private Location loc;
public PlacesAdapter(Context context, List<Places> places, Location loc){
this.context = context;
this.places = places;
inflater = LayoutInflater.from(context);
imageLoader = new ImageLoader(context);
resetPlaces();
}
public void resetPlaces(){
filteredPlaces = places;
}
public void filter(String s){
//validation
filteredPlaces = new ArrayList<Places>();//
for(int i=0;i<places.size();i++){
if(places.get(i).getName().toLowerCase().contains(s.toLowerCase())){
filteredPlaces.add(places.get(i));
}
}
}
public class ViewHolder {
RatingBar ratingBar;
TextView name;
TextView type;
TextView adress;
TextView phone;
TextView hours;
TextView details;
ImageView image;
}
#Override
public int getCount() {
return filteredPlaces.size();
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public Object getItem(int position) {
return filteredPlaces.get(position);
}
#Override
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.row_layout, null);
holder.name = (TextView)view.findViewById(R.id.placeName);
holder.type = (TextView) view.findViewById(R.id.placeType);
holder.image = (ImageView) view.findViewById(R.id.placeImage);
holder.ratingBar = (RatingBar)view.findViewById(R.id.placeRate);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
holder.ratingBar.setOnRatingBarChangeListener(onRatingChangedListener(holder, position));
holder.ratingBar.setTag(position);
holder.ratingBar.setRating(places.get(position).getRatingStar());
holder.name.setText(places.get(position).getName());
holder.type.setText(places.get(position).getType());
imageLoader.DisplayImage(places.get(position).getImage(),
holder.image);
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Intent intent = new Intent(context, PlaceDetails.class);
intent.putExtra("name", (places.get(position).getName()));
intent.putExtra("phone", (places.get(position).getPhone()));
intent.putExtra("hours", (places.get(position).getHours()));
intent.putExtra("rank", (places.get(position).getRatingStar()));
intent.putExtra("details", (places.get(position).getDetails()));
intent.putExtra("image", (places.get(position).getImage()));
context.startActivity(intent);
}
});
return view;
}
private RatingBar.OnRatingBarChangeListener onRatingChangedListener(final ViewHolder holder, final int position) {
return new RatingBar.OnRatingBarChangeListener() {
#Override
public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {
places.get(position).setRatingStar(v);
}
};
}
}
class for the query:
public class RemoteDataTask extends AsyncTask<ParseQuery<ParseObject>, Void, List<Places>> {
#Override
protected List<Places> doInBackground(ParseQuery<ParseObject>... query) {
List<Places> places = new ArrayList<Places>();
try {
List<ParseObject> ob = query[0].find();
for (ParseObject place : ob) {
ParseFile image = (ParseFile) place.get("image");
Places p = new Places();
p.setName((String) place.get("name"));
p.setType((String) place.get("type"));
p.setHours((String) place.get("hours"));
p.setPhone((String)place.get("phone"));
p.setDetails((String) place.get("details"));
p.setImage(image.getUrl());
places.add(p);
}
} catch (ParseException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return places;
}
}
I have many other classes in my project but im quite sure they are irrelevant for my question.
PS: what is the android equevilant for Swift's "NSUserDefaults"?
i need to check if an item already been rated and disable the RatingBar.
There are several ways to do it, for example you can:
Add an instance variable int rank to class Place with needed setter & getter.
Using Math.round set to each Place rank rounded value of rank/rankCount, both you can get with relevant ParseObject.getDouble
And then when creating view for Place, just use it's predefined rank variable as a counter for needed stars.
Note:
it's better to use: ParseObject.getString
instead of (String) place.get("name") getting an Object and then casting to String as you did. It's also mentioned in it's Parse Documentation:
In most cases it is more convenient to use a helper function such as ParseObject.getString(String) or ParseObject.getInt(String).
Leave a comment if you need further assistance
Related
I'm having a problem understanding how to finish this part of my code.
It's an app that searches a list of games with the help of an API.
Everything is working so far so good right now, but one final thing.
In the code, first of all I have a simple activity with an edit_text, a button and an empty list view that it is called "lv_listofgames".
Then, when I press the "search" button, I fill the "lv_listofgames" with a series of rows formed by an imageview, a listView called "list_item_text" and a button.
To this point everything is okay it seems.
Then I should just fill the "list_item_text" inside the "lv_listofgames" with the contents of an arraylist but I just can't make it happen. I tried in many ways but I'm stuck. I even tried using 2 adapters but the app crashed everytime or the "list_item_text" remained empty.
The arrayList is something like: [game_title='Name', release_date='date', platform=platform]
I seem so close to the solution but I just can't figure it out how to accomplish that. Im going crazy :(
tl;dr: problem: when I press the "search" button the arrayList content doesn't appear in the ListView "list_item_text".
Here is the code, tell me if something is wrong, thanks:
public class MainActovity extends AppCompatActivity {
EditText et_searchName;
Button btn_search;
ListView lv_listofgames;
ListView lv;
final GamesDataService gameDataService = new GamesDataService(MainActovity.this);
#Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
et_searchName = findViewById(R.id.et_searchName);
btn_search = findViewById(R.id.btn_search);
lv_listofgames= findViewById(R.id.lv_listofgames);
btn_search.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
gameDataService.getGameName(et_searchName.getText().toString(), new GamesDataService.searchGamesResponse() {
#Override
public void onError(String message) {
Toast.makeText(MainActovity.this, "Error", Toast.LENGTH_SHORT).show();
}
#Override
public void onResponse(List<GamesReportModel> gamesReportModels) {
List<GamesReportModel> newName = gamesReportModels;
List<String> stringsList = new ArrayList<>(newName.size());
for (Object object : newName) {
stringsList.add(Objects.toString(object, null));
}
System.out.println("stringsList:" + stringsList);
lv = (ListView) findViewById(R.id.lv_listofnames);
MyListAdapter adapter = new MyListAdapter(MainActovity.this, R.layout.details, stringsList);
lv.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
});
}
});
}
class MyListAdapter extends ArrayAdapter<String> {
private int layout;
public MyListAdapter(#NonNull Context context, int resource, #NonNull List<String> objects) {
super(context, resource, objects);
layout = resource;
}
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
MainActovity.ViewHolder mainViewHolder = null;
if(convertView == null) {
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(layout, parent, false);
MainActovity.ViewHolder viewHolder = new MainActovity.ViewHolder();
viewHolder.thumbnail = (ImageView) convertView.findViewById(R.id.list_item_thumbnail);
viewHolder.title = (ListView) convertView.findViewById(R.id.list_item_text);
viewHolder.button = (Button) convertView.findViewById(R.id.list_item_btn);
convertView.setTag(viewHolder);
viewHolder.button.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
}
});
}
else {
mainViewHolder = (MainActovity.ViewHolder) convertView.getTag();
}
return convertView;
}
}
public class ViewHolder {
ImageView thumbnail;
ListView title;
Button button;
}
}
GamesReportModel:
public class GamesReportModel {
private String game_title;
private String release_date;
private String platform;
public GamesReportModel(String game_title, String release_date, String platform) {
this.game_title = game_title;
this.release_date = release_date;
this.platform = platform;
}
public GamesReportModel() {
}
#Override
public String toString() {
return "game_title='" + game_title + '\'' +
", release_date='" + release_date + '\'' +
", platform=" + platform;
}
public String getGame_title() {
return game_title;
}
public void setGame_title(String game_title) {
this.game_title = game_title;
}
public String getRelease_date() {
return release_date;
}
public void setRelease_date(String release_date) {
this.release_date = release_date;
}
public String getPlatform() {
return platform;
}
public void setPlatform(String platform) {
this.platform = platform;
}
}
There are two things you need to change in your code to get the desired effect.
In your row view layout (R.layout.details), replace the ListView with a TextView since you are just trying to show text for a given row (not a nested list inside each row). Then update the view holder to hold the correct view type as well
viewHolder.title = (TextView) convertView.findViewById(R.id.list_item_text);
//...
public class ViewHolder {
ImageView thumbnail;
TextView title;
Button button;
}
In the adapter's getView method you have to actually set the text to show for that row. You never set the text to show anywhere, which is why your rows are blank. That should look like this:
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
MainActovity.ViewHolder mainViewHolder = null;
if(convertView == null) {
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(layout, parent, false);
MainActovity.ViewHolder viewHolder = new MainActovity.ViewHolder();
viewHolder.thumbnail = (ImageView) convertView.findViewById(R.id.list_item_thumbnail);
viewHolder.title = (TextView) convertView.findViewById(R.id.list_item_text);
viewHolder.button = (Button) convertView.findViewById(R.id.list_item_btn);
convertView.setTag(viewHolder);
}
else {
mainViewHolder = (MainActovity.ViewHolder) convertView.getTag();
}
// Here, you need to set what values to show for this row - this
// is why your list is empty/blank
mainViewHolder.title.setText((String)getItem(position));
return convertView;
}
I would like someone to click on an item in my ListView and then my new activity would start and the text of the item they clicked on should be set as the text of the TextView in my new activity. Currently with the following code, my TextView result is:
'com.example.draft.AnimalNames#31571cf'
Here is what I have in MainActivity.java:
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String clickedName = (list.getItemAtPosition(position).toString());
Intent intent = new Intent(MainActivity.this, Profile.class);
intent.putExtra("clickedName", clickedName);
startActivity(intent);
System.out.println(clickedName);
}
});
And in my new activity:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.profile_layout);
Intent intent = getIntent();
String clickedName = intent.getStringExtra("clickedName");
animalName = findViewById(R.id.textView);
animalName.setText(clickedName);
}
And in my AnimalNames.java file:
public class AnimalNames {
private String animalName;
public AnimalNames(String animalName) {
this.animalName = animalName;
}
public String getanimalName() {
return this.animalName;
}
}
I don't think it's relevant to my question but here is my ListViewAdapter.java file:
public class ListViewAdapter extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
private List<AnimalNames> animalNamesList; // Declare a null variable
private ArrayList<AnimalNames> arraylist; // Declare a null array
public ListViewAdapter(Context context, List<AnimalNames> animalNamesList) {
mContext = context;
this.animalNamesList = animalNamesList;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<AnimalNames>();
this.arraylist.addAll(animalNamesList);
}
public class ViewHolder {
TextView name;
}
#Override
public int getCount() {
return animalNamesList.size();
}
#Override
public AnimalNames getItem(int position) {
return animalNamesList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.list_view_items, null); // Locate the TextViews in list_view_items.xml
holder.name = (TextView) view.findViewById(R.id.name);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Set the results into TextViews
holder.name.setText(animalNamesList.get(position).getanimalName());
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
animalNamesList.clear();
if (charText.length() == 0) {
animalNamesList.addAll(arraylist);
} else {
for (AnimalNames wp : arraylist) {
if (wp.getanimalName().toLowerCase(Locale.getDefault()).contains(charText)) {
animalNamesList.add(wp);
}
}
}
notifyDataSetChanged();
}
}
String clickedName = (list.getItemAtPosition(position).toString());
By calling toString() method, it will give you the object reference, which is what you get in the TextView.
According to your code, if you wish to see the Animal name, you should do (and fix the method name to getAnimalName):
String clickedName = ((AnimalNames)list.getItemAtPosition(position)).getanimalName();
getItemAtPosition() returns an Object, so you need to cast it to the correct class.
I made an Adapter for my recyclerView. This adapter works when I use on any xxxActivity.java but when I try to use is on a Fragment Its hows error. Doesn't let me Pass the onClickHandler() that I created in Adapter.
I am Setting Adapter Like this -
events_recyclerview.setAdapter(new FixedPlaceListAdapter(getContext(), placelist, mClickHandler)); //ClickListener doesn't work :'(
Another try was like --
events_recyclerview.setAdapter(new FixedPlaceListAdapter(getContext(), placelist, getmClickHandler()));
Here, I implemented getClickHandler() in the Fragment--
public FixedPlaceListAdapter.FixedPlaceListAdapterOnclickHandler getmClickHandler() {
return mClickHandler;
} //Still doesn't work :'(
and the Adapter Part--
Constructor like this-
public FixedPlaceListAdapter(Context mContext, List<PlaceBean>
placeBeanList, FixedPlaceListAdapterOnclickHandler mClickHandler) {
this.mContext = mContext;
this.placeBeanList = placeBeanList;
this.mClickHandler = mClickHandler;
}
I tried to do this ... but still doesn't work--
events_recyclerview.setAdapter(new FixedPlaceListAdapter(getContext(), placelist, FixedPlaceListAdapter.FixedPlaceListAdapterOnclickHandler.mClickhandler));
here is my full adapter code-
public class FixedPlaceListAdapter extends RecyclerView.Adapter<FixedPlaceListAdapter.FixedPlaceListAdapterViewHolder> {
private final FixedPlaceListAdapterOnclickHandler mClickHandler;
Context mContext;
List<PlaceBean> placeBeanList;
public FixedPlaceListAdapter(Context mContext, List<PlaceBean> placeBeanList, FixedPlaceListAdapterOnclickHandler mClickHandler) {
this.mContext = mContext;
this.placeBeanList = placeBeanList;
this.mClickHandler = mClickHandler;
}
public void setData(List<PlaceBean> placeBeanList) {
this.placeBeanList = placeBeanList;
notifyDataSetChanged();
}
#Override
public FixedPlaceListAdapterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(mContext);
View view = inflater.inflate(R.layout.top_list_single, parent, false);
return new FixedPlaceListAdapterViewHolder(view);
}
#Override
public void onBindViewHolder(FixedPlaceListAdapterViewHolder holder, int position) {
PlaceBean pb = placeBeanList.get(position);
holder.nameTextView.setText(pb.getName());
holder.addressTextView.setText(pb.getVicinity());
holder.rating.setRating(pb.getRating());
if (pb.getPhotoref() != null) {
String imageUrl = UrlsUtil.getSinglePhotoUrlString(mContext, pb.getPhotoref(), "350", "300");
Picasso.with(mContext)
.load(imageUrl)
.into(holder.thumbnailImage);
}
}
#Override
public int getItemCount() {
return placeBeanList.size();
}
public interface FixedPlaceListAdapterOnclickHandler {
void onClick(String id);
}
public class FixedPlaceListAdapterViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView nameTextView;
TextView addressTextView;
RatingBar rating;
ImageView thumbnailImage;
public FixedPlaceListAdapterViewHolder(View itemView) {
super(itemView);
nameTextView = (TextView) itemView.findViewById(R.id.place_name_now_in_list);
addressTextView = (TextView) itemView.findViewById(R.id.address_in_list);
rating = (RatingBar) itemView.findViewById(R.id.rating_single_place_in_list);
thumbnailImage = (ImageView) itemView.findViewById(R.id.place_image_thumb);
itemView.setOnClickListener(this);
}
#Override
public void onClick(View v) {
String placeID = placeBeanList.get(getAdapterPosition()).getPlaceref();
mClickHandler.onClick(placeID);
}
}
}
Need Help!
public class CategoryNewsListAdapter extends RecyclerView.Adapter<CategoryNewsListAdapter.ViewHolder> {
private List<CategoryNews> actors = new ArrayList<>();
private Context mContext;
private Queue<List<CategoryNews>> pendingUpdates =
new ArrayDeque<>();
**public interface NewsItemClickListener {
void onNewsItemClick(int pos, CategoryNews categoryNews, ImageView shareImageView);
}**
**NewsItemClickListener newsItemClickListener;**
public CategoryNewsListAdapter(List<CategoryNews> personList, Context mContext, NewsItemClickListener newsItemClickListener) {
this.actors.addAll(personList);
this.mContext = mContext;
this.newsItemClickListener = newsItemClickListener;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View view = inflater.inflate(R.layout.particular_cat_news_list_row, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Log.d("BusinessSubCategoryListAdapter", "Bindviewholder without payload");
final CategoryNews newsCategory = actors.get(position);
holder.news_title.setText(newsCategory.getPostTitle());
holder.news_date.setText(newsCategory.getPostDate());
holder.news_category.setText(newsCategory.getCategoryName());
holder.news_description.setText(newsCategory.getPostContent());
// GlideApp
// .with(mContext).load(newsCategory.getPostImage())
// .placeholder(R.mipmap.ic_launcher) // can also be a drawable
// .error(R.drawable.placeholder_image) // will be displayed if the image cannot be loaded
// .crossFade()
// .into(holder.news_image);
Picasso.with(mContext).load(newsCategory.getPostImage()).placeholder(R.drawable.placeholder_image).error(R.drawable.placeholder_image).into(holder.news_image);
**holder.itemView.setOnClickListener(v -> {
newsItemClickListener.onNewsItemClick(position, newsCategory, holder.news_image);
});**
}
#Override
public void onBindViewHolder(ViewHolder holder, int position, List<Object> payloads) {
if (payloads.isEmpty()) {
// if empty, do full binding;
onBindViewHolder(holder, position);
return;
}
Bundle bundle = (Bundle) payloads.get(0);
String newTitle = bundle.getString("NAME_CHANGE");
if (newTitle != null) {
// add some animation if you want
final CategoryNews actor = actors.get(position);
holder.news_title.setText(actor.getPostTitle());
holder.news_date.setText(actor.getPostDate());
holder.news_category.setText(actor.getCategoryName());
holder.news_description.setText(actor.getPostContent());
}
}
public void addItems(List<CategoryNews> newItems) {
// record this value before making any changes to the existing list
int curSize = getItemCount();
// update the existing list
actors.addAll(newItems);
// curSize should represent the first element that got added
// newItems.size() represents the itemCount
notifyItemRangeInserted(curSize, newItems.size());
}
public void updtateItems(List<CategoryNews> newItems) {
// record this value before making any changes to the existing list
int curSize = getItemCount();
// update the existing list
actors.addAll(newItems);
// curSize should represent the first element that got added
// newItems.size() represents the itemCount
notifyItemRangeInserted(0,newItems.size()- getItemCount()-1);
}
#Override
public int getItemCount() {
return actors.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
private TextView news_title, news_date, news_category, news_description;
private ImageView news_image;
public ViewHolder(View itemView) {
super(itemView);
news_title = (TextView) itemView.findViewById(R.id.news_title);
news_date = (TextView) itemView.findViewById(R.id.news_date);
news_category = (TextView) itemView.findViewById(R.id.news_category);
news_description = (TextView) itemView.findViewById(R.id.news_description);
news_image = (ImageView) itemView.findViewById(R.id.news_image);
}
}
}
And In your activity
implements NewsItemClickListener
create object NewsItemClickListener newsItemClickListner;
inside oncreate newsItemClickListner=this; (you mush have implemented 1)
pass that object to recyclerview.
In adapter it is received by this
public CategoryNewsListAdapter(List personList, Context mContext, NewsItemClickListener newsItemClickListener) {
this.actors.addAll(personList);
this.mContext = mContext;
this.newsItemClickListener = newsItemClickListener;
}
In your activity
CategoryNewsListAdapter categoryNewsListAdapter= new CategoryNewsListAdapter(list,this,newsItemClickListner)
After doing all this your overriden method will be called when you click in item of recycler view where you have set onclick listner
Okay .. The Problem is Fixed now ...
I was passing the wrong value or maybe the method of passing the ClickHandler was wrong.
The Solution of the Problem :
I Created another Class for ClickHandler-
public class PlaceCardClickHandler implements
FixedPlaceListAdapter.FixedPlaceListAdapterOnclickHandler,
PlaceListAdapter.PlaceListAdapterOnclickHandler {
Context mContext;
public PlaceCardClickHandler(Context mContext) {
this.mContext = mContext;
}
#Override
public void onClick(String id) {
Intent intentToStartDetail = new Intent(mContext, PlaceDetailActivity.class);
intentToStartDetail.putExtra("id", id);
mContext.startActivity(intentToStartDetail);
}
}
and the change in the Fragment was like this- (Just passed a object from the ClickHandler class)
events_recyclerview.setAdapter(new FixedPlaceListAdapter(getContext(), placelist, new PlaceCardClickHandler(getContext())));
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Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 7 years ago.
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I have an activity that has container that contain fragments and this fragment has other fragments.
Now I want this second or child fragment to access views in main activity, but it returns null pointer exception.
class:
public class ImageListFragment extends AbsListViewBaseFragment implements ObservableScrollViewCallbacks {
public static final int INDEX = 0;
android.support.design.widget.FloatingActionButton mFab;
#Bind(R.id.ic_call)
ImageView mIcCall;
#Bind(R.id.ic_email)
ImageView mIcEmail;
#Bind(R.id.ic_forum)
ImageView mIcForum;
FabToolbar mFabToolbar;
ObservableListView mObservableListView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fr_image_list, container, false);
listView = (ListView) rootView.findViewById(android.R.id.list);
((ListView) listView).setAdapter(new ImageAdapter(getActivity()));
final SubTaB mainActivity = (SubTaB)getActivity();
ButterKnife.bind(mainActivity);
//////////////// problem here
mFabToolbar = (FabToolbar) rootView.findViewById(R.id.fabtoolbar);
////////////////
getFragmentManager().findFragmentByTag("TAG");
// rootView.findViewById(R.id.fab);
mObservableListView = (ObservableListView)rootView.findViewById(android.R.id.list);
//
mObservableListView.setAdapter(this.listView.getAdapter());
mObservableListView.setScrollViewCallbacks(this);
mainActivity.mFab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(mainActivity.getApplicationContext(), "msg msg", Toast.LENGTH_LONG).show();
mainActivity.mFabToolbar.expandFab();
}
});
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
startImagePagerActivity(position);
}
});
return rootView;
}
#Override
public void onDestroy() {
super.onDestroy();
AnimateFirstDisplayListener.displayedImages.clear();
}
private static class ImageAdapter extends BaseAdapter {
private static final String[] IMAGE_URLS = Constants.IMAGES;
private LayoutInflater inflater;
private ImageLoadingListener animateFirstListener = new AnimateFirstDisplayListener();
private DisplayImageOptions options;
ImageAdapter(Context context) {
inflater = LayoutInflater.from(context);
options = new DisplayImageOptions.Builder()
.showImageOnLoading(R.drawable.ic_stub) // تغيير الفيو قبل تحميل الصورة
.showImageForEmptyUri(R.drawable.ic_empty) // لما الصورة فاضية
.showImageOnFail(R.drawable.ic_error) // عند الفشل
.cacheInMemory(true)
.cacheOnDisk(true)
.considerExifParams(true)
.displayer(new CircleBitmapDisplayer(Color.WHITE, 5))
.build();
}
#Override
public int getCount() {
return IMAGE_URLS.length;
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = convertView;
final ViewHolder holder;
if (convertView == null) {
view = inflater.inflate(R.layout.item_list_image, parent, false);
holder = new ViewHolder();
holder.text = (TextView) view.findViewById(R.id.text);
holder.image = (ImageView) view.findViewById(R.id.image);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
holder.text.setText("Item " + (position + 1));
ImageLoader.getInstance().displayImage(IMAGE_URLS[position], holder.image, options, animateFirstListener);
return view;
}
}
static class ViewHolder {
TextView text;
ImageView image;
}
#Override
public void onScrollChanged(int i, boolean b, boolean b1) {
}
#Override
public void onDownMotionEvent() {
}
#Override
public void onUpOrCancelMotionEvent(ScrollState scrollState) {
Log.d("","Scroll scroll scroll");
if (scrollState == ScrollState.UP) {
mFabToolbar.slideOutFab();
} else if (scrollState == ScrollState.DOWN) {
mFabToolbar.slideInFab();
}
}
#OnClick(R.id.fab)
void onFabClick() {
mFabToolbar.expandFab();
}
#OnClick(R.id.call)
void onClickCall() {
iconAnim(mIcCall);
}
#OnClick(R.id.ic_email)
void onClickEmail() {
iconAnim(mIcEmail);
}
#OnClick(R.id.ic_forum)
void onClickForum() {
iconAnim(mIcForum);
}
private void iconAnim(View icon) {
Animator iconAnim = ObjectAnimator.ofPropertyValuesHolder(
icon,
PropertyValuesHolder.ofFloat("scaleX", 1f, 1.5f, 1f),
PropertyValuesHolder.ofFloat("scaleY", 1f, 1.5f, 1f));
iconAnim.start();
}
private static class AnimateFirstDisplayListener extends SimpleImageLoadingListener {
static final List<String> displayedImages = Collections.synchronizedList(new LinkedList<String>());
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
if (loadedImage != null) {
ImageView imageView = (ImageView) view;
boolean firstDisplay = !displayedImages.contains(imageUri);
if (firstDisplay) {
FadeInBitmapDisplayer.animate(imageView, 500);
displayedImages.add(imageUri);
}
}
}
}
}
It is not good practise to find and control a view in this way. Views can easily become detached from activities and cause unexpected exceptions.
You should rather look at using callbacks to communicate between fragments and activities if required. That way, it also keeps your code in the correct places - so the activity is the only one touching its own views and the fragment also only touches its own views. It merely tells the activity (via callbacks) that something has happened that the activity might want to know about. It also ensures that the fragments are completely self contained and can be easily reused.
You can read about how to implement callbacks here: http://developer.android.com/training/basics/fragments/communicating.html
Use EventBus to communicate between the activity and the fragment. riggarro suggestion is the correct way. But you can also able to update the base activity views using the EventBus.
For example we need to update a TextView text in a activity from the fragment, follow the steps.
First you need to add the following library as dependency to your project in build.gradle of your app.
compile 'de.greenrobot:eventbus:2.4.0'
First you need to create a Event Object class to communicate between the fragment and activity like below.
public class UpdateTextEvent {
private String sampleTextValue;
public UpdateTextEvent(String textValue) {
this.sampleTextValue = textValue;
}
public String getTextValue() {
return sampleTextValue;
}
}
You need to post a event to the event bus in the fragment to update the TextView in the activity.
public class TestingFragment extends Fragment{
private EventBus bus = EventBus.getDefault()
public TextingFragment(){}
public void onCreate(Bundle onSavedInstanceState){
super.onCreate(onSavedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState){
View v = inflater.inflate(R.layout.sample_activity, parent, false);
...
Button b1 = (Button) v.findViewById(R.id.button1);
b1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//trigger a update to the activity
bus.post(new UpdateTextEvent("testing"));
}
});
}
}
After that you need to register the bus with the callback of the event in the activity like below.
public class MainActivity extends Activity{
private EventBus bus = EventBus.getDefault();
private TextView textView;
#Override
public void onCreate(Bundle onSavedInstanceState){
super.onCreate(onSavedInstanceState);
....
// The textview going to be updated on posting the event
textView = (TextView) findViewById(R.id.text1);
bus.register(this);
}
public void onEvent(UpdateTextEvent event){
textView.setText(event.getTextValue());
}
}
In this above example the onEvent method will be called when you post a event from the fragment..
Hope it will help you.
i have problem with listview... i'm trying to add OnClickListener but in still doesn't work. I want to display another activity after click. Can somebody help me? I know that there are many of example, but it's doesn't work for my appl or i don't know how to use it in my example...
This is my LocationAdapter class:
public class LocationAdapter extends ArrayAdapter<LocationModel> {
int resource;
String response;
Context context;
private LayoutInflater mInflater;
public LocationAdapter(Context context, int resource, List<LocationModel> objects) {
super(context, resource, objects);
this.resource = resource;
mInflater = LayoutInflater.from(context);
}
static class ViewHolder {
TextView titleGameName;
TextView distanceGame;
}
public View getView(int position, View convertView, ViewGroup parent)
{
ViewHolder holder;
//Get the current location object
LocationModel lm = (LocationModel) getItem(position);
//Inflate the view
if(convertView==null)
{
convertView = mInflater.inflate(R.layout.item, null);
holder = new ViewHolder();
holder.titleGameName = (TextView) convertView
.findViewById(R.id.it_location_title);
holder.distanceGame = (TextView) convertView
.findViewById(R.id.it_location_distance);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.titleGameName.setText(lm.getGameName());
holder.distanceGame.setText(lm.getGameDistance()+" km");
return convertView;
}
}
This is my mainListView class:
public class SelectGameActivity extends Activity {
LocationManager lm;
GeoPoint userLocation;
ArrayList<LocationModel> locationArray = null;
LocationAdapter locationAdapter;
LocationList list;
ListView lv;
TextView loadingText;
TextView sprawdz;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.selectgame);
lv = (ListView) findViewById(R.id.list_nearme);
locationArray = new ArrayList<LocationModel>();
locationAdapter = new LocationAdapter(SelectGameActivity.this, R.layout.item, locationArray);
lv.setTextFilterEnabled(true);
lv.setAdapter(locationAdapter);
lv.setItemsCanFocus(true);
String serverName = getResources().getString(R.string.serverAdress);
ApplicationController AC = (ApplicationController)getApplicationContext();
String idPlayer = AC.getIdPlayer();
int latitude = AC.getCurrentPositionLat();
int longitude = AC.getCurrentPositionLon();
int maxDistance = 99999999;
try {
new LocationSync().execute("myserverName");
} catch(Exception e) {}
}
//this is connection with json
private class LocationSync extends AsyncTask<String, Integer, LocationList> {
protected LocationList doInBackground(String... urls) {
LocationList list = null;
int count = urls.length;
for (int i = 0; i < count; i++) {
try {
// ntar diganti service
RestClient client = new RestClient(urls[i]);
try {
client.Execute(RequestMethod.GET);
} catch (Exception e) {
e.printStackTrace();
}
String json = client.getResponse();
list = new Gson().fromJson(json, LocationList.class);
//
} catch(Exception e) {}
}
return list;
}
protected void onProgressUpdate(Integer... progress) {
}
protected void onPostExecute(LocationList loclist) {
for(LocationModel lm : loclist.getLocations())
{
locationArray.add(lm);
}
locationAdapter.notifyDataSetChanged();
}
}
EDIT:: I have second problem... i want to get id from item (items are downloading from json url) This is my list:
I want to get for example: ID:159 for first item and send it to nextActivity.
I have also the controllerClass.java where i'm setting and getting selectedIdGame:
public String getIdGameSelected() {
return idGame;
}
public void setIdGameSelected(String idGame) {
this.idGame = idGame;
}
Is it good idea? Thanks for help.
Ok, it's done. i used:
public void onItemClick(AdapterView<?> a, View
v, int position, long id) {
String idGame = (String) ((TextView) v.findViewById(R.id.idGameSelected)).getText();
Thanks, Michal.
You could define an onItemClick on your adapter instance (i.e. in mainListView.java, just after lv.setAdapter):
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> a, View
v, int position, long id) {
Intent i = new Intent(v.getContext(), NextActivity.class);
startActivity(i);
}
});
lv.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
Intent i = new Intent(view.getContext(), NextActivity.class);
startActivity(i);
}
});
I don't know why this wouldn't work, put it after the try{}catch{} block.