So im following this tutorial http://www.wingnity.com/blog/android-json-parsing-and-image-loading-tutorial/ on how to parse a JSON Api and displays data into Listview
I tried to adapt the code in my fragment , in onCreateView method , but the Listview is not displayed (blank fragment). And i dont know why.
I imported all the required libs
Actor.java
public class Actors {
private String name;
private String description;
private String dob;
private String country;
private String height;
private String spouse;
private String children;
private String image;
public Actors() {
// TODO Auto-generated constructor stub
}
public Actors(String name, String description, String dob, String country,
String height, String spouse, String children, String image) {
super();
this.name = name;
this.description = description;
this.dob = dob;
this.country = country;
this.height = height;
this.spouse = spouse;
this.children = children;
this.image = image;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getHeight() {
return height;
}
public void setHeight(String height) {
this.height = height;
}
public String getSpouse() {
return spouse;
}
public void setSpouse(String spouse) {
this.spouse = spouse;
}
public String getChildren() {
return children;
}
public void setChildren(String children) {
this.children = children;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
}
ActorAdapter.java
import java.io.InputStream;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import info.androidhive.navigationdrawer.R;
public class ActorAdapter extends ArrayAdapter<Actors> {
ArrayList<Actors> actorList;
LayoutInflater vi;
int Resource;
ViewHolder holder;
public ActorAdapter(Context context, int resource, ArrayList<Actors> objects) {
super(context, resource, objects);
vi = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
actorList = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// convert view = design
View v = convertView;
if (v == null) {
holder = new ViewHolder();
v = vi.inflate(Resource, null);
holder.imageview = (ImageView) v.findViewById(R.id.ivImage);
holder.tvName = (TextView) v.findViewById(R.id.tvName);
holder.tvDescription = (TextView) v.findViewById(R.id.tvDescriptionn);
holder.tvDOB = (TextView) v.findViewById(R.id.tvDateOfBirth);
holder.tvCountry = (TextView) v.findViewById(R.id.tvCountry);
holder.tvHeight = (TextView) v.findViewById(R.id.tvHeight);
holder.tvSpouse = (TextView) v.findViewById(R.id.tvSpouse);
holder.tvChildren = (TextView) v.findViewById(R.id.tvChildren);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
holder.imageview.setImageResource(R.drawable.imgadd);
new DownloadImageTask(holder.imageview).execute(actorList.get(position).getImage());
holder.tvName.setText(actorList.get(position).getName());
holder.tvDescription.setText(actorList.get(position).getDescription());
holder.tvDOB.setText("B'day: " + actorList.get(position).getDob());
holder.tvCountry.setText(actorList.get(position).getCountry());
holder.tvHeight.setText("Height: " + actorList.get(position).getHeight());
holder.tvSpouse.setText("Spouse: " + actorList.get(position).getSpouse());
holder.tvChildren.setText("Children: " + actorList.get(position).getChildren());
return v;
}
static class ViewHolder {
public ImageView imageview;
public TextView tvName;
public TextView tvDescription;
public TextView tvDOB;
public TextView tvCountry;
public TextView tvHeight;
public TextView tvSpouse;
public TextView tvChildren;
}
private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
Articles.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/ivImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:src="#drawable/imgadd" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Tom Cruise"
android:textColor="#166CED"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/tvDateOfBirth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#D64530"
android:text="Date of Birth: July 3, 1962" />
<TextView
android:id="#+id/tvHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Height: 1.80 m"
android:textColor="#D64530"
android:textAppearance="?android:attr/textAppearanceSmall" />
<TextView
android:id="#+id/tvCountry"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#D64530"
android:text="United States" />
</LinearLayout>
</LinearLayout>
<TextView
android:id="#+id/tvDescriptionn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#009A57"
android:text="Description" />
<TextView
android:id="#+id/tvSpouse"
android:layout_width="wrap_content" android:textColor="#166CED"
android:layout_height="wrap_content"
android:text="Spouse: Katie Holmes" />
<TextView
android:id="#+id/tvChildren"
android:layout_width="wrap_content" android:textColor="#166CED"
android:layout_height="wrap_content"
android:text="Children: Suri Cruise, Isabella Jane Cruise, Connor Cruise" />
</LinearLayout>
Fragment_accueil.xml (my fragment layout)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:orientation="vertical"
tools:context="info.androidhive.navigationdrawer.fragment.AccueilFragment">
<ListView
android:id="#+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
tools:listitem="#layout/articles">
</ListView>
</LinearLayout>
fragment_accueil.java (my fragment activity)
//import.....
public class AccueilFragment extends Fragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
int score = 0;
TextView t1, t2, t3,t4;
ImageView img;
private OnFragmentInteractionListener mListener;
public AccueilFragment() {
}
public static AccueilFragment newInstance(String param1, String param2) {
AccueilFragment fragment = new AccueilFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_accueil, container, false);
t1 = (TextView) view.findViewById(R.id.tvName);
t2 = (TextView) view.findViewById(R.id.tvDateOfBirth);
t3 = (TextView) view.findViewById(R.id.tvHeight);
t3 = (TextView) view.findViewById(R.id.tvCountry);
img = (ImageView) view.findViewById(R.id.ivImage);
ArrayList actorsList = new ArrayList<Actors>();
ListView listview = (ListView) view.findViewById(R.id.list);
ListAdapter adapter = new ActorAdapter(getActivity().getApplicationContext(), R.layout.articles, actorsList);
listview.setAdapter(adapter);
new getData().execute();
return view;
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
class getData extends AsyncTask<String, String, String> {
HttpURLConnection urlConnection;
#Override
protected String doInBackground(String... args) {
StringBuilder result = new StringBuilder();
try {
URL url = new URL("http://microblogging.wingnity.com/JSONParsingTutorial/jsonActors");
urlConnection = (HttpURLConnection) url.openConnection();
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
urlConnection.disconnect();
}
return result.toString();
}
#Override
protected void onPostExecute(String result) {
try {
JSONObject jsono = new JSONObject(result);
JSONArray jarray = jsono.getJSONArray("actors");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Actors actor = new Actors();
actor.setName(object.getString("name"));
actor.setDescription(object.getString("description"));
actor.setDob(object.getString("dob"));
actor.setCountry(object.getString("country"));
actor.setHeight(object.getString("height"));
actor.setSpouse(object.getString("spouse"));
actor.setChildren(object.getString("children"));
actor.setImage(object.getString("image"));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(Uri uri);
}
}
What's the problem and how to fix that ? thanks
There is couple of things wrong:
1.You are not adding Actors actor = new Actors(); to the actorsList
2.Calling this:
ArrayList actorsList = new ArrayList<Actors>();
ListView listview = (ListView) view.findViewById(R.id.list);
ListAdapter adapter = new ActorAdapter(getActivity().getApplicationContext(), R.layout.articles, actorsList);
will reuslt in blank data in listview
I would suggest you to add the data in your onPostExecute() to the Arraylist and then initialize the adapter with the data.
or you can also call
adapter.notifyDataSetChanged() in onPostExecute()
Are you adding the ListView in your fragment that you want it to be displayed for example:
public class FragmentMain extends Fragment
{
private ListView listView; //Define the list view up here.
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//Set the listview equal to the fragment name
listView = inflater.inflate(R.layout.fragment_name, container, false);
}
}
This should work, let me know if otherwize :)
Related
I know that there are already questions on this, but the format which I follow for my code is different so I am unable to find the answer to the question.
When I click on my RecyclerView item which includes TextView and ImageView, I want to show the image in a DetailActivity.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/framelayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="pritish.sawant.com.photogallery.MainActivity">
</FrameLayout>
fragment_photo_gallery.xml
<RelativeLayout
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="pritish.sawant.com.photogallery.PhotoGalleryFragment">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:id="#+id/recyclerview"
android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/loading_indicator"
style="#style/Widget.AppCompat.ProgressBar"
android:layout_centerInParent="true"/>
</RelativeLayout>
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/textview"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
tools:text="Hi" />
<ImageView
android:id="#+id/imageview"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
tools:src="#drawable/image1">
</ImageView>
</LinearLayout>
activity_detail.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="pritish.sawant.com.photogallery.DetailActivity">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/detailimageview"
tools:src="#drawable/image1"/>
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity {
private FragmentManager fragmentManager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("Photo Gallery");
fragmentManager=getSupportFragmentManager();
Fragment fragment=fragmentManager.findFragmentById(R.id.framelayout);
if(fragment==null){
fragment=new PhotoGalleryFragment();
fragmentManager.beginTransaction().add(R.id.framelayout,fragment).commit();
}
}
}
Photo.java
package pritish.sawant.com.photogallery;
public class Photo {
private String title;
private String author;
private String authorId;
private String link;
private String image;
private String tag;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getAuthorId() {
return authorId;
}
public void setAuthorId(String authorId) {
this.authorId = authorId;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getTag() {
return tag;
}
public void setTag(String tag) {
this.tag = tag;
}
#Override
public String toString() {
return "Photo{" +
"title='" + title + '\'' +
", author='" + author + '\'' +
", authorId='" + authorId + '\'' +
", link='" + link + '\'' +
", image='" + image + '\'' +
", tag='" + tag + '\'' +
'}';
}
}
FlickrFetchr.java
package pritish.sawant.com.photogallery;
import android.net.Uri;
import org.json.JSONArray;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
public class FlickrFetchr {
private static final String TAG = "FlickrFetchr";
private List<Photo> photoList = null;
private String baseUrl="https://api.flickr.com/services/feeds/photos_public.gne";
public String getData(String url){
BufferedReader bufferedReader=null;
try {
URL url1=new URL(url);
HttpURLConnection httpURLConnection=(HttpURLConnection)url1.openConnection();
StringBuilder stringBuilder=new StringBuilder();
bufferedReader=new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));
String line;
while ((line=bufferedReader.readLine())!=null){
stringBuilder.append(line+"\n");
}
return stringBuilder.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
finally {
if(bufferedReader!=null){
try {
bufferedReader.close();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
}
}
private String buildURL(String searchPhoto, String lang, boolean match){
return Uri.parse(baseUrl).buildUpon().appendQueryParameter("tags", searchPhoto)
.appendQueryParameter("tagmode", match ? "ALL" : "ANY")
.appendQueryParameter("format", "json")
.appendQueryParameter("lang", lang)
.appendQueryParameter("nojsoncallback", "1").build().toString();
}
public List<Photo> fetchPhotos(String searchPhoto,String language,boolean matchAll){
String url=buildURL(searchPhoto,language,matchAll);
return downloadGalleyItem(url);
}
//To receive the json format
public List<Photo> downloadGalleyItem(String url){
photoList=new ArrayList<>();
Photo photo=new Photo();
String jsonString=getData(url);
try {
JSONObject jsonObject=new JSONObject(jsonString);
JSONArray jsonArray=jsonObject.getJSONArray("items");
for(int i=0;i<jsonArray.length();i++){
JSONObject jsonObject1=jsonArray.getJSONObject(i);
photo.setTitle(jsonObject1.getString("title"));
photo.setAuthor(jsonObject1.getString("author"));
photo.setAuthorId(jsonObject1.getString("author_id"));
photo.setTag(jsonObject1.getString("tags"));
JSONObject jsonMedia =jsonObject1.getJSONObject("media");
String imageUrl=jsonMedia.getString("m");
photo.setImage(jsonMedia.getString("m"));
//we are changing _m to _b so that when image is tapped we get biigger image
photo.setLink(imageUrl.replaceAll("_m.","_b."));
photoList.add(photo);
}
} catch (Exception e) {
e.printStackTrace();
}
return photoList;
}
}
RecyclerItemClickListener.java
public class RecyclerItemClickListener extends RecyclerView.SimpleOnItemTouchListener {
private static final String TAG = "RecyclerItemClickListen";
interface OnRecyclerClickListener{
void onItemClick(View view,int position);
void onItemLongClick(View view,int position);
}
private final OnRecyclerClickListener listener;
private final GestureDetectorCompat gestureDetectorCompat;
public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, final OnRecyclerClickListener listener) {
this.listener = listener;
gestureDetectorCompat=new GestureDetectorCompat(context,new GestureDetector.SimpleOnGestureListener(){
#Override
public boolean onSingleTapUp(MotionEvent e) {
View childView=recyclerView.findChildViewUnder(e.getX(),e.getY());
if(childView!=null && listener!=null){
listener.onItemClick(childView,recyclerView.getChildAdapterPosition(childView));
}
return true;
}
#Override
public void onLongPress(MotionEvent e) {
View childView=recyclerView.findChildViewUnder(e.getX(),e.getY());
if(childView!=null && listener!=null){
listener.onItemLongClick(childView,recyclerView.getChildAdapterPosition(childView));
}
}
});
}
public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent motionEvent){
if (gestureDetectorCompat!=null){
boolean result=gestureDetectorCompat.onTouchEvent(motionEvent);
return result;
}else{
return false;
}
}
}
PhotoGalleryFragment.java
public class PhotoGalleryFragment extends Fragment implements RecyclerItemClickListener.OnRecyclerClickListener{
private RecyclerView recyclerView;
public ProgressBar progressBar;
public List<Photo> photos = new ArrayList<>();
public PhotoGalleryFragment() {
// Required empty public constructor
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
setHasOptionsMenu(true);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_photo_gallery, container, false);
progressBar = (ProgressBar) view.findViewById(R.id.loading_indicator);
recyclerView = (RecyclerView) view.findViewById(R.id.recyclerview);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
recyclerView.addOnItemTouchListener(new RecyclerItemClickListener(getActivity(),recyclerView,this));
progressBar.setVisibility(View.GONE);
setUpAdapter();
new FetchTask().execute();
return view;
}
private void setUpAdapter() {
//isAdded checks whether fragment has been added to the activity
if (isAdded()) {
recyclerView.setAdapter(new PhotoAdapter(photos));
}
}
#Override
public void onItemClick(View view, int position) {
Toast.makeText(getActivity(),"Item Clicked",Toast.LENGTH_LONG).show();
Intent intent=new Intent(getActivity(),DetailActivity.class);
//what should i pass in putExtra of intent
//intent.putExtra("IMAGE",photo.getLink());
startActivity(intent);
}
#Override
public void onItemLongClick(View view, int position) {
Toast.makeText(getActivity(),"Item Long Clicked",Toast.LENGTH_LONG).show();
}
private class PhotoHolder extends RecyclerView.ViewHolder {
private ImageView imageView;
private TextView textView;
public PhotoHolder(View itemView) {
super(itemView);
imageView = (ImageView) itemView.findViewById(R.id.imageview);
textView = (TextView) itemView.findViewById(R.id.textview);
}
public void bindItems(Photo photos1) {
Picasso.with(getActivity()).load(photos1.getImage()).into(imageView);
textView.setText(photos1.getTitle());
// Glide.with(getActivity()).load(photos1.getImage()).into(imageView);
}
}
private class PhotoAdapter extends RecyclerView.Adapter<PhotoHolder> {
private List<Photo> galleryItems;
public PhotoAdapter(List<Photo> galleryItems) {
this.galleryItems = galleryItems;
}
#Override
public PhotoHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
View view = layoutInflater.inflate(R.layout.list_item, parent, false);
return new PhotoHolder(view);
}
#Override
public void onBindViewHolder(PhotoHolder holder, int position) {
Photo photos2 = galleryItems.get(position);
holder.bindItems(photos2);
}
#Override
public int getItemCount() {
return galleryItems.size();
}
}
private class FetchTask extends AsyncTask<Void, Void, List<Photo>> {
#Override
protected void onPreExecute() {
super.onPreExecute();
if (photos.size() == 0) {
progressBar.setVisibility(View.VISIBLE);
}
}
#Override
protected List<Photo> doInBackground(Void... params) {
return new FlickrFetchr().fetchPhotos("android", "en-us", false);
}
#Override
protected void onPostExecute(List<Photo> photos1) {
super.onPostExecute(photos);
progressBar.setVisibility(View.GONE);
photos = photos1;
setUpAdapter();
}
}
}
DetailActivity.java
public class DetailActivity extends AppCompatActivity {
private ImageView imageView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
imageView=(ImageView)findViewById(R.id.detailimageview);
int img_id;
if (savedInstanceState != null ){
img_id = getIntent().getIntExtra("IMAGE",0);
imageView.setImageResource(img_id);
}
}
}
In onItemClick you can pass Like this
Toast.makeText(getActivity(),"Item Clicked",Toast.LENGTH_LONG).show();
Intent intent=new Intent(getActivity(),DetailActivity.class);
//what should i pass in putExtra of intent
intent.putExtra("IMAGE",photos.get(position).getLink());
startActivity(intent);
In DetailsActivity you can retrieve it by
if (getIntent().getStringExtra("IMAGE") != null) {
imageurl = getIntent().getStringExtra("IMAGE");
}
I'm having troubles with adding a searchview to a Json results. I can use the searchview without the Json, but not together.
In this example, If I write something on the searchview, all the gridview disappears. It´s like the searchview doesn´t receive anything.
I made the Json from this tutorial: http://www.wingnity.com/blog/android-json-parsing-and-image-loading-tutorial/
And the searchview from this: http://abhiandroid.com/ui/searchview
The results I have in a Gridview
public class Tab3
#SuppressWarnings("deprecation")
public class Tab3 extends Fragment implements SearchView.OnQueryTextListener {
SearchView editsearch;
GridView lv;
ArrayList < Actors > actorsList = new ArrayList < > ();
ActorAdapter adapter;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View vw = inflater.inflate(R.layout.search_view, container, false);
GridView gridview = (GridView) vw.findViewById(R.id.gridviewFilms);
ArrayList < Actors > actorsList = getAllItemObject();
ActorAdapter customAdapter = new ActorAdapter(getActivity(), R.layout.jsonparsedata_item, actorsList);
gridview.setAdapter(customAdapter);
gridview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView < ? > parent, View view, int position, long id) {
Intent filmInfo = new Intent(getContext(), FilmInfo.class);
filmInfo.putExtra("position", position);
startActivity(filmInfo);
}
});
new JSONAsynTask().execute("http://microblogging.wingnity.com/JSONParsingTutorial/jsonActors");
// adapter = new ActorAdapter(getActivity(), R.layout.jsonparsedata_item, actorsList);
// Locate the ListView in listview_main.xml
lv = (GridView) vw.findViewById(R.id.gridviewFilms);
// Pass results to ListViewAdapter Class
adapter = new ActorAdapter(getActivity(), R.layout.jsonparsedata_item, actorsList);
// Binds the Adapter to the ListView
lv.setAdapter(adapter);
editsearch = (SearchView) vw.findViewById(R.id.search);
editsearch.setOnQueryTextListener(this);
return vw;
}
class JSONAsynTask extends AsyncTask < String, Void, Boolean > {
String result;
#Override
protected Boolean doInBackground(String...urls) {
try {
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
String data = EntityUtils.toString(entity);
JSONObject jsono = new JSONObject(data);
JSONArray jarray = jsono.getJSONArray("actors");
for (int i = 0; i < jarray.length(); i++) {
JSONObject object = jarray.getJSONObject(i);
Actors actor = new Actors();
actor.setName(object.getString("name"));
actor.setDescription(object.getString("description"));
actor.setDob(object.getString("dob"));
actor.setCountry(object.getString("country"));
actor.setHeight(object.getString("height"));
actor.setSpouse(object.getString("spouse"));
actor.setChildren(object.getString("children"));
actor.setImage(object.getString("image"));
actorsList.add(actor);
}
return true;
}
} catch (ParseException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
adapter.notifyDataSetChanged();
if (result == false) {
Toast.makeText(getActivity(), "Unable to fetch data from server", Toast.LENGTH_LONG).show();
}
}
}
private ArrayList < Actors > getAllItemObject() {
//esto devuelve los valores a los titulos. Esta muy guarro, deberia de estarlo arriba
return actorsList;
}
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
String text = newText;
adapter.filter(text);
return false;
}
}
public class ActorAdapter
public class ActorAdapter extends ArrayAdapter < Actors > {
// ArrayList<Actors> actorList;
LayoutInflater vi;
int Resource;
ViewHolder holder;
private List < Actors > animalNamesList = null;
private ArrayList < Actors > arraylist;
public ActorAdapter(Context context, int resource, ArrayList < Actors > objects) {
super(context, resource, objects);
vi = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
// this.actorList = objects;
this.animalNamesList = objects;
this.arraylist = new ArrayList < Actors > ();
this.arraylist.addAll(objects);
}
static class ViewHolder {
public ImageView imageview;
public TextView tvName;
public TextView tvDescription;
public TextView tvDOB;
public TextView tvCountry;
public TextView tvHeight;
public TextView tvSpouse;
public TextView tvChildren;
}
#Override
public int getCount() {
return animalNamesList.size();
}
#Override
public Actors getItem(int position) {
return animalNamesList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
// convert view = design
View v = convertView;
if (v == null) {
holder = new ViewHolder();
v = vi.inflate(Resource, null);
holder.imageview = (ImageView) v.findViewById(R.id.cover);
holder.tvName = (TextView) v.findViewById(R.id.name);
holder.tvCountry = (TextView) v.findViewById(R.id.director);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
holder.imageview.setImageResource(R.drawable.clapboard);
new DownloadImageTask(holder.imageview).execute(animalNamesList.get(position).getImage());
holder.tvName.setText(animalNamesList.get(position).getName());
holder.tvCountry.setText(animalNamesList.get(position).getCountry());
return v;
}
private class DownloadImageTask extends AsyncTask < String,
Void,
Bitmap > {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String...urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream( in );
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
animalNamesList.clear();
if (charText.length() == 0) {
animalNamesList.addAll(arraylist);
} else {
for (Actors wp: arraylist) {
if (wp.getName().toLowerCase(Locale.getDefault()).contains(charText)) {
animalNamesList.add(wp);
}
}
}
notifyDataSetChanged();
}
}
public class Actors
public class Actors {
private String name;
private String description;
private String dob;
private String country;
private String height;
private String spouse;
private String children;
private String image;
public Actors() {
// TODO Auto-generated constructor stub
}
public Actors(String name, String description, String dob, String country,
String height, String spouse, String children, String image) {
super();
this.name = name;
this.description = description;
this.dob = dob;
this.country = country;
this.height = height;
this.spouse = spouse;
this.children = children;
this.image = image;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDob() {
return dob;
}
public void setDob(String dob) {
this.dob = dob;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
public String getHeight() {
return height;
}
public void setHeight(String height) {
this.height = height;
}
public String getSpouse() {
return spouse;
}
public void setSpouse(String spouse) {
this.spouse = spouse;
}
public String getChildren() {
return children;
}
public void setChildren(String children) {
this.children = children;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}}
jsonparse_fragment
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<SearchView
android:id="#+id/search"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:iconifiedByDefault="false"
android:queryHint="Pelikulen izenak..."
android:background="#f70">
<requestFocus />
</SearchView>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/gridviewTab3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="#+id/search"
android:gravity="center"
android:horizontalSpacing="4dp"
android:numColumns="2"
android:padding="4dp"
android:scrollbars="vertical"
android:scrollbarThumbVertical="#drawable/custom_scroll_style"
android:stretchMode="columnWidth"
android:verticalSpacing="4dp" />
jsonparsedata_item.xml
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
card_view:cardBackgroundColor="#color/colorText"
card_view:cardUseCompatPadding="true"
card_view:cardCornerRadius="4dp"
card_view:cardElevation="15dp">
<RelativeLayout
android:layout_height="250dp"
android:layout_width="200dp"
android:paddingBottom="6dp">
<TextView
android:id="#+id/director"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world"
android:textColor="#color/colorTextDark"
android:textSize="10sp"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true"
android:paddingLeft="4dp" />
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/hello_world"
android:textColor="#color/colorTextDark"
android:textSize="12sp"
android:layout_above="#+id/director"
android:layout_alignParentStart="true"
android:paddingLeft="4dp" />
<ImageView
android:id="#+id/cover"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/hello_world"
android:scaleType="fitXY"
android:src="#drawable/milian"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_above="#+id/name"
android:layout_alignParentEnd="true" />
</RelativeLayout>
I have ViewPager that containing 3 different Fragment. each Fragment containing A Different View and also ListView, I got a problem when I was trying to show the ListView in one of Fragment from ViewPager, it doesn't show anything. I've tried to debug my adapter and it seems my getView() method is not called. I try to call my Fragment not from ViewPager, the result is getView() is called from adapter and ListView is showing. Is there any problem to show ListView from ViewPager? I have tried this solution by calling my adapter from onViewCreated() but there's nothing change. so is there any wrong with my method? this is my code :
My Fragment Class for Managing ViewPager
public class Frag_Provider extends Fragment {
private String[] tabsTitles = {"TERDEKAT", "SEMUA", "PROVIDERKU"};
String url = "";
List<ModelProvider> list_provider;
DB_Esehat db_esehat = null;
SQLiteDatabase db = null;
ContentLoadingProgressBar progressbar;
TabLayout tabLayout;
ViewPager pager;
public Frag_Provider (){
}
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
((MainActivity) getActivity()).custom_toolbar("Provider", R.color.toolbar_provider, R.color.toolbar_provider_dark);
View result=inflater.inflate(R.layout.fragment_provider, container, false);
list_provider = new ArrayList<ModelProvider>();
progressbar = (ContentLoadingProgressBar)result.findViewById(R.id.progressbar);
db_esehat = new DB_Esehat(getActivity());
db = db_esehat.getWritableDatabase();
db.delete("LST_PROVIDER", null, null);
pager=(ViewPager)result.findViewById(R.id.pager);
tabLayout = (TabLayout)result.findViewById(R.id.sliding_tabs);
url = getResources().getString(R.string.url_host)+getResources().getString(R.string.url_provider);
new ProviderTask(url).execute();
pager.setAdapter(buildAdapter(tabsTitles));
tabLayout.post(new Runnable() {
#Override
public void run() {
tabLayout.setupWithViewPager(pager);
}
});
return(result);
}
public class ProviderTask extends AsyncTask<String, Void, String> {
String url = "";
public ProviderTask(String url) {
this.url = url;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
progressbar.setVisibility(View.VISIBLE);
}
#Override
protected String doInBackground(String... params) {
String result = "";
try {
result = Connection.get(url);
} catch (Exception e) {
result = "";
}
return result;
}
#Override
protected void onPostExecute(String result) {
progressbar.setVisibility(View.GONE);
pager.setVisibility(View.VISIBLE);
tabLayout.setVisibility(View.VISIBLE);
super.onPostExecute(result);
if (result.equals("") || result.equals(null)) {
MethodSupport.AlertDialog(getActivity());
} else {
try {
JSONArray Data = new JSONArray(result);
for (int i = 0; i < Data.length(); i++) {
String LSKA_NOTE = "";
String RSALAMAT = "";
String RSTELEPON = "";
String RSNAMA = "";
String MAPPOS = "";
int RSTYPE = 0;
int RSID = 0;
int RS_NTT = 0;
JSONObject json = Data.getJSONObject(i);
if (json.has("LSKA_NOTE")) {
LSKA_NOTE = json.getString("LSKA_NOTE");
}
if (json.has("RSALAMAT")) {
RSALAMAT = json.getString("RSALAMAT");
}
if (json.has("RSTELEPON")) {
RSTELEPON = json.getString("RSTELEPON");
}
if (json.has("RSNAMA")) {
RSNAMA = json.getString("RSNAMA");
}
if (json.has("MAPPOS")) {
MAPPOS = json.getString("MAPPOS");
}
if (json.has("RSTYPE")) {
RSTYPE = json.getInt("RSTYPE");
}
if (json.has("RSID")) {
RSID = json.getInt("RSID");
}
if (json.has("RS_NTT")) {
RS_NTT = json.getInt("RS_NTT");
}
db_esehat.InsertRS(LSKA_NOTE, RSALAMAT, RSTELEPON, RSNAMA, MAPPOS, RSTYPE, RSID, RS_NTT);
}
} catch (Exception e) {
Log.d("TES", e.getMessage());
}
}
}
}
private PagerAdapter buildAdapter(String[] tabsTitles) {
return(new FragmentStatePagerAdapter(getActivity(), getChildFragmentManager(),tabsTitles));
}
}
This is FragmentStatePagerAdapter.java
public class FragmentStatePagerAdapter extends FragmentPagerAdapter {
Context ctxt=null;
private String[] tabsTitles;
public FragmentStatePagerAdapter(Context ctxt, FragmentManager mgr, String[] tabsTitles) {
super(mgr);
this.ctxt=ctxt;
this.tabsTitles = tabsTitles;
}
#Override
public int getCount() {
return tabsTitles.length;
}
#Override
public Fragment getItem(int position) {
switch(position) {
case 0:
return Frag_Provider_Terdekat.newInstance(position);
case 1:
return Frag_Provider_Semua.newInstance(position);
case 2:
return Frag_Provider_Ku.newInstance(position);
}
return null;
}
// #Override public float getPageWidth(int position) { return(0.7f); }
#Override
public String getPageTitle(int position) {
return tabsTitles[position];
}
}
this is my Fragment_Provider.xml, Layout for managing my ViewPager
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.widget.ContentLoadingProgressBar
android:id="#+id/progressbar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="gone"
android:indeterminate="false" />
<android.support.design.widget.TabLayout
android:id="#+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMaxWidth="0dp"
app:tabGravity="fill"
style="#style/MyCustomTabLayout"
app:tabMode="fixed"
android:fillViewport="true"
android:visibility="gone" />
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="fill_parent"
android:layout_height="0px"
android:layout_weight="1"
android:background="#android:color/white"
android:layout_below="#id/sliding_tabs"
android:visibility="gone"/>
</RelativeLayout>
This is of my Fragment in ViewPagerthat containing ListView :
public class Frag_Provider_Terdekat extends Fragment {
private static final String KEY_POSITION="position";
private ListView list_provider;
List<ModelProviderTerdekat> list_ekamedicare;
DB_Esehat db_esehat;
SQLiteDatabase db;
ProviderTerdekatAdapter adapter;
static Frag_Provider_Terdekat newInstance(int position) {
Frag_Provider_Terdekat frag=new Frag_Provider_Terdekat();
Bundle args=new Bundle();
args.putInt(KEY_POSITION, position);
frag.setArguments(args);
return(frag);
}
static String getTitle(Context ctxt, int position) {
return("PROVIDER KU");
}
#Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View result=inflater.inflate(R.layout.fragment_child_providerterdekat, container, false);
list_provider = (ListView)result.findViewById(R.id.list_provider);
list_ekamedicare = new ArrayList<ModelProviderTerdekat>();
db_esehat = new DB_Esehat(getActivity());
list_ekamedicare = db_esehat.getProvider();
adapter = new ProviderTerdekatAdapter(getActivity().getApplicationContext(), R.layout.adapter_provider, list_ekamedicare);
list_provider.setAdapter(adapter);
return result;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
}
#Override
public void onDetach() {
super.onDetach();
}
}
and this is Adapter for my ListView
public class ProviderTerdekatAdapter extends ArrayAdapter<ModelProviderTerdekat> {
List<ModelProviderTerdekat> data = Collections.emptyList();
private LayoutInflater inflater;
private Context context;
static class ViewHolder {
ImageView imvprov_map;
ImageView imvprov_fav;
TextView textprov_nama_rs;
TextView textprov_alamat_rs;
TextView textprov_km_rs;
}
public ProviderTerdekatAdapter (Context context, int viewResourceId, List<ModelProviderTerdekat> data) {
super(context, R.layout.adapter_provider, data);
this.context = context;
inflater = LayoutInflater.from(context);
this.data = data;
}
#Override
public int getCount() {
return data.size();
}
#Override
public long getItemId(int arg0) {
return 0;
}
#Override
public View getView(int position, View view, ViewGroup parent) {
if (view == null) {
view = inflater.inflate(R.layout.adapter_provider, parent, false);
ViewHolder viewHolder = new ViewHolder();
viewHolder.imvprov_map = (ImageView) view.findViewById(R.id.imvprov_map);
viewHolder.imvprov_fav = (ImageView) view.findViewById(R.id.imvprov_fav);
viewHolder.textprov_nama_rs = (TextView) view.findViewById(R.id.textprov_nama_rs);
viewHolder.textprov_alamat_rs = (TextView) view.findViewById(R.id.textprov_alamat_rs);
viewHolder.textprov_km_rs = (TextView) view.findViewById(R.id.textprov_km_rs);
view.setTag(viewHolder);
}
ViewHolder viewHolder = (ViewHolder) view.getTag();
viewHolder.textprov_nama_rs.setText(data.get(position).getRSNAMA());
viewHolder.textprov_alamat_rs.setText(data.get(position).getRSALAMAT());
return view;
}
}
I have no Idea why my GetView() not called in my Adapter, is it because I put in ViewPager? well I hope someone understand about it and help me to solver my problem. thank you very much.
Finally.. I found a solution for my problem, it's because I put ViewPager in RelativeLayout after I change into LinearLayout all view displayed as I wanted
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.widget.ContentLoadingProgressBar
android:id="#+id/progressbar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="gone"
android:indeterminate="false" />
<android.support.design.widget.TabLayout
android:id="#+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMaxWidth="0dp"
app:tabGravity="fill"
style="#style/MyCustomTabLayout"
app:tabMode="fixed"
android:fillViewport="true"
android:visibility="gone" />
<android.support.v4.view.ViewPager
android:id="#+id/pager"
android:layout_width="fill_parent"
android:layout_height="0px"
android:layout_weight="1"
android:background="#android:color/white"
android:layout_below="#id/sliding_tabs"
android:visibility="gone"/>
</LinearLayout>
I have MainActivity class where I parse an HTML page with JSOUP and I also have custom adapter which store data for each row in my ListView. So I get data with JSOUP and it's ok as my LogCat tell me. But when I try to put data to my ListView I get an error.
My activity_main layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true" >
</ListView>
</RelativeLayout>
My list_item layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="50dp"
android:orientation="horizontal" >
<ImageView
android:id="#+id/thumbImageNews"
android:layout_marginLeft="10dp"
android:layout_width="120dp"
android:layout_height="120dp"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true" />
<TextView
android:id="#+id/titleNews"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/thumbImageNews"
android:paddingLeft="5dp"
android:paddingRight="0dp"
android:paddingTop="5dp"
android:text=""
android:textColor="#ff0d075c"
android:textStyle="italic"
android:typeface="sans"
android:gravity="center"
android:layout_marginTop="10dp" />
<TextView
android:id="#+id/date2News"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/thumbImageNews"
android:paddingLeft="5dp"
android:paddingRight="0dp"
android:paddingTop="2dp"
android:text=""
android:textColor="#ff585858"
android:textSize="12sp"
android:layout_marginLeft="10dp"/>
</RelativeLayout>
CustomListAdapter activity:
public class CustomListAdapter extends BaseAdapter {
private ArrayList<FeedItem> listData;
private LayoutInflater layoutInflater;
private Context mContext;
public CustomListAdapter(Context context, ArrayList<FeedItem> listData) {
this.listData = listData;
layoutInflater = LayoutInflater.from(context);
mContext = context;
}
#Override
public int getCount() {
return listData.size();
}
#Override
public Object getItem(int position) {
return listData.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = layoutInflater.inflate(R.layout.list_item, null);
holder = new ViewHolder();
holder.headlineView = (TextView) convertView.findViewById(R.id.titleNews);
holder.reportedDateView = (TextView) convertView.findViewById(R.id.date2News);
holder.imageView = (ImageView) convertView.findViewById(R.id.thumbImageNews);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
FeedItem newsItem = (FeedItem) listData.get(position);
holder.headlineView.setText(newsItem.getTitle());
// holder.reportedDateView.setText(newsItem.getDate());
if (holder.imageView != null) {
new ImageDownloaderTask(holder.imageView).execute(newsItem.getAttachmentUrl());
}
return convertView;
}
static class ViewHolder {
TextView headlineView;
TextView reportedDateView;
ImageView imageView;
}
}
FeedItem class to store data for each row:
public class FeedItem implements Serializable {
private String title;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
private String date;
public String getAttachmentUrl() {
return attachmentUrl;
}
public void setAttachmentUrl(String attachmentUrl) {
this.attachmentUrl = attachmentUrl;
}
private String attachmentUrl;
}
And my MainActivity class where executes all main functions:
public class MainActivity extends Activity {
public Elements title;
public Elements picture;
final String ATTRIBUTE_NAME_TEXT = "text";
final String ATTRIBUTE_NAME_IMAGE = "image";
final String ATTRIBUTE_NAME_DATE = "date";
private ArrayList<FeedItem> feedList = null;
private ListView feedListView = null;
public CustomListAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
feedListView = (ListView) findViewById(R.id.listView1);
new NewThread().execute();
}
public class NewThread extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... arg) {
Document doc;
try {
doc = Jsoup.connect("http://example.com/news/").get();
title = doc.select("h2[class=et_pt_title]");
picture = doc.select("img");
for (Element titles : title) {
FeedItem item = new FeedItem();
item.setTitle(titles.text());
Log.w("title",""+item.getTitle());
feedList.add(item);
}
for (Element img : picture){
String iurl;
iurl = img.absUrl("src");
FeedItem item = new FeedItem();
item.setAttachmentUrl(iurl);
Log.w("imgUrl",""+item.getAttachmentUrl());
feedList.add(item);
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
adapter = new CustomListAdapter(MainActivity.this,feedList);
feedListView.setAdapter(adapter);
}
}
}
So my problem is that when feedList.add(item); executes I get NullPointerException, but Log.w("title",""+item.getTitle()); shows me that everything is ok. What I do wrong?
Your feedList is not initialized.
So before adding items to it, please initialize.
ArrayList<FeedItem> feedList = new ArrayList<FeedItem> ;
Add the above line before you call the AsyncTask i.e. before new NewThread().execute();
It should look like this
feedList = new ArrayList<FeedItem> ;
new NewThread().execute();
Your mistake was you have just declared this
private ArrayList<FeedItem> feedList = null;
not initialized. So just initialize on onCreate() method.
feedList = new ArrayList<FeedItem> ;
private ArrayList<FeedItem> feedList = null;
without create object you are adding data in arraylist
feedList.add(item);
please create object
feedList = new ArrayList<FeedItem>()
than Add
feedList.add(item);
I need help with a project in Android where I'm working. I have an AsyncTask that external data collected through the internet with a custom adapter.
My view currently has a view that is generated by the adapter and outside of it, contains a button. I would like to press that button give me current information from view as for example the name of the element.
MainActivity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ebebeb"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#drawable/header" >
<TextView
android:layout_width="fill_parent"
android:layout_height="55dp"
android:gravity="center_vertical"
android:paddingLeft="35dp"
android:text="Menú"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#FFF" />
<TextView
android:id="#+id/openmenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:background="#drawable/ic_action_overflow"
android:clickable="true"
android:contentDescription="Desc"
android:visibility="visible" />
<TextView
android:id="#+id/love"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#drawable/ic_action_love"
android:clickable="true"
android:contentDescription="Desc"
android:visibility="visible" />
<TextView
android:id="#+id/refresh"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/love"
android:layout_alignBottom="#+id/love"
android:layout_marginRight="5dp"
android:layout_toLeftOf="#+id/love"
android:background="#drawable/ic_action_refresh"
android:clickable="true"
android:contentDescription="Desc"
android:visibility="visible" />
</RelativeLayout>
<com.unomasdelafamilia.sevilla.CardContainer
android:id="#+id/layoutview"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#ebebeb" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center" >
<Button
android:id="#+id/infobtn"
android:layout_width="75dp"
android:layout_height="75dp"
android:layout_alignParentTop="true"
android:layout_toRightOf="#+id/lovebtn"
android:background="#drawable/love" />
</RelativeLayout>
</LinearLayout>
MainActivity.class
private class JSONParse extends AsyncTask {
#Override
protected void onPreExecute() {
super.onPreExecute();
mCardContainer = (CardContainer) findViewById(R.id.layoutview);
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Obteniendo datos ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
JSONObject json = jParser.getJSONfromURL(url);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
if(json != null){
pDialog.dismiss();
try {
// Getting JSON Array
user = json.getJSONArray(TAG_USER);
for (int i = 0; i < user.length(); i++) {
JSONObject c = user.getJSONObject(i);
String id = c.getString(TAG_ID);
String image = c.getString(imagen);
adapter.add(new CardModel(id, "Sevilla", image));
}
mCardContainer.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}
}else{
pDialog.dismiss();
Toast.makeText(getApplicationContext(), "Compruebe su conexión e inténtelo de nuevo más tarde", Toast.LENGTH_SHORT).show();
//No hay datos
}
}
CardModel.class
public class CardModel {
private String title;
private String description;
//private Drawable cardImageDrawable;
private String image;
/* private Drawable cardLikeImageDrawable;
private Drawable cardDislikeImageDrawable;*/
private OnCardDimissedListener mOnCardDimissedListener = null;
private OnClickListener mOnClickListener = null;
public interface OnCardDimissedListener {
void onLike();
void onDislike();
}
public interface OnClickListener {
void OnClickListener();
}
/*public CardModel(String string, Drawable drawable) {
this(null, null, null);
}*/
public CardModel(String title, String description, String image) {
this.title = title;
this.description = description;
//this.cardImageDrawable = cardImage;
this.image = image;
}
public CardModel(String title, String description, Bitmap cardImage) {
this.title = title;
this.description = description;
//this.cardImageDrawable = new BitmapDrawable(null, cardImage);
}
public CardModel(HashMap<String, String> map) {
this.title = title;
this.description = description;
this.image = image;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public String getImage(){
return image;
}
public void setDescription(String description) {
this.description = description;
}
public void setImage(String image) {
this.image = image;
}
/*public Drawable getCardLikeImageDrawable() {
return cardLikeImageDrawable;
}
public void setCardLikeImageDrawable(Drawable cardLikeImageDrawable) {
this.cardLikeImageDrawable = cardLikeImageDrawable;
}
public Drawable getCardDislikeImageDrawable() {
return cardDislikeImageDrawable;
}
public void setCardDislikeImageDrawable(Drawable cardDislikeImageDrawable) {
this.cardDislikeImageDrawable = cardDislikeImageDrawable;
}
*/
/* public void setOnCardDimissedListener( OnCardDimissedListener listener ) {
this.mOnCardDimissedListener = listener;
}
public OnCardDimissedListener getOnCardDimissedListener() {
return this.mOnCardDimissedListener;
}
public void setOnClickListener( OnClickListener listener ) {
this.mOnClickListener = listener;
}
public OnClickListener getOnClickListener() {
return this.mOnClickListener;
}*/
}
SimpleCardStackAdapter.java
public final class SimpleCardStackAdapter extends CardStackAdapter {
public SimpleCardStackAdapter(Context mContext) {
super(mContext);
}
#Override
public View getCardView(int position, CardModel model, View convertView, ViewGroup parent) {
if(convertView == null) {
LayoutInflater inflater = LayoutInflater.from(getContext());
convertView = inflater.inflate(R.layout.std_card_inner, parent, false);
assert convertView != null;
}
int loader = R.drawable.ic_launcher;
ImageView image = (ImageView) convertView.findViewById(R.id.sp_image);
ImageLoader imgLoader = new ImageLoader(mContext);
//((ImageView) convertView.findViewById(R.id.sp_image)).setImageDrawable(model.getImage());
((TextView) convertView.findViewById(R.id.textView1)).setText(model.getTitle());
((TextView) convertView.findViewById(R.id.textView2)).setText(model.getDescription());
imgLoader.DisplayImage(model.getImage(), loader, image);
convertView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
//Toast.makeText(getContext(), "Pulsado", Toast.LENGTH_SHORT).show();
((ViewManager)v.getParent()).removeView(v);
}
});
return convertView;
}
}
In short, how I can get ítem information when the button is pressed. Thank you very much to all, Greetings
You should use the tag property of views in Android.
So, you can dynamically set the tag like
String item = "item";
Button button = findViewById(R.id.Button);
button.setTag(item);
where and whenever is appropriate in you code.
Then, you can retrieve the tag when clicked like
#Override
public void onClick(View button) {
String myString = (String) button.getTag();
}
Update
After understanding OPs requirement.
In your overridden getCardView handler, after you instantiate the ImageView like
ImageView image = (ImageView) convertView.findViewById(R.id.sp_image);
set its tag from the model object like
image.setTag(model.getTitle());
then, in your click handler, get the tag of the ImageView like
#Override
public void onClick(View button) {
ImageView image = (ImageView) getView().findViewById(R.id.sp_image);
String item = (String)image.getTag();
}