Listview doesn't appear at Fragment after second compile

Listview doesn't appear at Fragment after second compile - android

Listview doesn't appear at Fragment after second compile.
The button at fragment works, so the problem is with listview and adapter, but I can't understand where the problem is.
Even if I delete the program and reinstall, it doesn't help. Only if move some other place method updatepost it can work once.
Hope for advice! I'm just learning all this.
Main fragment:
public class MainFragment extends Fragment {
ArrayList<Bitmap> bitArray;
CustomListAdapter adapter;
public MainFragment() {
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
#Override
public void onStart() {
super.onStart();}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
ListView listview = (ListView)rootView.findViewById(R.id.listViewPost);
Log.v("Plaxehere","1");
adapter = new CustomListAdapter(getContext(), bitArray);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Toast.makeText(getActivity(), "YESS", Toast.LENGTH_SHORT).show();
}
});
Button but =(Button) rootView.findViewById(R.id.button_back_to_home);
but.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
Toast.makeText(getContext(), "Text", Toast.LENGTH_SHORT).show();
/*Intent intent = new Intent(getActivity(), MainActivity.class).putExtra(Intent.EXTRA_TEXT, "Hello");
startActivity(intent);*/
}
});
return rootView;
}
private void updatePost() {
FetchPosterTask postTask = new FetchPosterTask(getActivity());
postTask.execute("uk_news.json");
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
bitArray = new ArrayList<>();
updatePost();
}
class FetchPosterTask extends AsyncTask<String, Void, ArrayList<Bitmap>> {
private final String LOG_TAG = FetchPosterTask.class.getSimpleName();
private Context context;
public FetchPosterTask (Context myContext) {
this.context = myContext;
}
#Override
protected ArrayList<Bitmap> doInBackground(String... params) {
if(params.length ==0 ){
return null;
}
String json = null;
try {
json = getJson(params[0]);
} catch (IOException e)
{
e.printStackTrace();
}
try {
String[] masPst = getPosterfromJsonAsString(json);
ArrayList<Bitmap> result =decodeImageToBitmap(masPst);
return result;
}catch (JSONException e){
Log.e(LOG_TAG, "Place 5", e);
}
return null;
}
private String getJson(String filename) throws IOException{
InputStream is = this.context.getAssets().open(filename);
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
return new String(buffer);
}
private String[] getPosterfromJsonAsString(String posterJson) throws JSONException {
final String OWM_NFO = "nfo";
final String OWM_NWS = "nws";
final String OWM_PST = "pst";
JSONObject imageJson = new JSONObject(posterJson);
JSONObject nfoArray = imageJson.getJSONObject(OWM_NFO);
JSONArray nwsArray = nfoArray.getJSONArray(OWM_NWS);
String[] resultStr = new String[nwsArray.length()];
for(int i =0; i<nwsArray.length(); i++){
JSONObject pst = nwsArray.getJSONObject(i);
String im = pst.getString(OWM_PST);
resultStr[i] = im;
}
return resultStr;
}
public ArrayList<Bitmap> decodeImageToBitmap (String[] base64Image) {
ArrayList<Bitmap> bitmapArrayList = new ArrayList<Bitmap>();
for(int i =0; i<4; i++) {
byte[] decodedString = Base64.decode(base64Image[i], Base64.DEFAULT);
Bitmap base64Bitmap = BitmapFactory.decodeByteArray(decodedString, 0,
decodedString.length);
bitmapArrayList.add(i, base64Bitmap);
}
return bitmapArrayList;
}
#Override
protected void onPostExecute(ArrayList<Bitmap> bitmapArrayList) {
if(bitArray.size()!=0){
bitArray.clear();
bitArray.addAll(bitmapArrayList);
}
else{
bitArray.addAll(bitmapArrayList);
}
}
}
}
Adapter
public class CustomListAdapter extends BaseAdapter {
private final String LOG_TAG = CustomListAdapter.class.getSimpleName();
private ArrayList<Bitmap> bitmapArrayList;
private LayoutInflater layoutInflater;
public CustomListAdapter(Context context, ArrayList<Bitmap> bitmapArrayList) {
this.bitmapArrayList = bitmapArrayList;
this.layoutInflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return bitmapArrayList.size();
}
#Override
public Object getItem(int position) {
return bitmapArrayList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null) {
convertView = layoutInflater.inflate(R.layout.list_post_item, null);
holder = new ViewHolder();
holder.imageView = (ImageView) convertView.findViewById(R.id.list_item);
convertView.setTag(holder);
Log.v(LOG_TAG,"1");
}
else {
holder = (ViewHolder) convertView.getTag();
Log.v(LOG_TAG,"2");
}
Log.v(LOG_TAG,"3");
if(getItem(position) == null) {
holder.imageView.setImageResource(R.drawable.pst_0);
Log.v(LOG_TAG,"5");
}
else{
holder.imageView.setImageBitmap((Bitmap) getItem(position));
Log.v(LOG_TAG,"6");
}
Log.v(LOG_TAG,"4");
return convertView;
}
static class ViewHolder {
ImageView imageView;
}
}
Main Activity
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new MainFragment())
.commit();
}
}
}

Related

Android:Receive Array of Objects and display in listView

Hello to all android folks over there!!
I want to get list of objects from web service and want to display them in list view.Now i am able to fetch those values and collected them in arraylist.But i am facing problem to display them in list view.below is my code.
Using everyones suggestion ,i solved my problem.Thats the spirit of android buddies.I am pasting my answer in UPDATED block.Hope it will be helpful in future.
UPDATED
public class TabFragment2 extends android.support.v4.app.Fragment {
ListView FacultyList;
View rootView;
LinearLayout courseEmptyLayout;
FacultyListAdapter facultyListAdapter;
String feedbackresult,programtype,programname;
Boolean FeedBackResponse;
String FacultiesList[];
public ArrayList<Faculty> facultylist = new ArrayList<Faculty>();
SharedPreferences pref;
FacultyListAdapter adapter;
SessionSetting session;
public TabFragment2(){
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
pref = getActivity().getSharedPreferences("prefbook", getActivity().MODE_PRIVATE);
programtype = pref.getString("programtype", "NOTHINGpref");
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.activity_studenttab2, container, false);
session = new SessionSetting(getActivity());
new FacultySyncerBg().execute("");
courseEmptyLayout = (LinearLayout) rootView.findViewById(R.id.feedback_empty_layout);
FacultyList = (ListView) rootView.findViewById(R.id.feedback_list);
facultyListAdapter = new FacultyListAdapter(getActivity());
FacultyList.setEmptyView(rootView.findViewById(R.id.feedback_list));
FacultyList.setAdapter(facultyListAdapter);
return rootView;
}
public class FacultyListAdapter extends BaseAdapter {
private final Context context;
public FacultyListAdapter(Context context) {
this.context = context;
if (!facultylist.isEmpty())
courseEmptyLayout.setVisibility(LinearLayout.GONE);
}
#Override
public View getView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder TabviewHolder;
if (convertView == null) {
TabviewHolder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_item_feedback,
parent, false);
TabviewHolder.FacultyName = (TextView) convertView.findViewById(R.id.FacultyName);//facultyname
TabviewHolder.rating = (RatingBar) convertView.findViewById(R.id.rating);//rating starts
TabviewHolder.Submit = (Button) convertView.findViewById(R.id.btnSubmit);
// Save the holder with the view
convertView.setTag(TabviewHolder);
} else {
TabviewHolder = (ViewHolder) convertView.getTag();
}
final Faculty mFac = facultylist.get(position);//*****************************NOTICE
TabviewHolder.FacultyName.setText(mFac.getEmployeename());
// TabviewHolder.ModuleName.setText(mFac.getSubject());
TabviewHolder.rating.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
feedbackresult =String.valueOf(rating);
}
});
return convertView;
}
#Override
public int getCount() {
return facultylist.size();
}
#Override
public Object getItem(int position) {return facultylist.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
}
static class ViewHolder {
TextView FacultyName;
RatingBar rating;
Button Submit;
}
private class FacultySyncerBg extends AsyncTask<String, Integer, Void> {
ProgressDialog progressDialog;
#Override
protected void onPreExecute() {
progressDialog= ProgressDialog.show(getActivity(), "Faculty Feedback!","Fetching Faculty List", true);
}
#Override
protected Void doInBackground(String... params) {
//CALLING WEBSERVICE
Faculty(programtype);
return null;
}
#Override
protected void onPostExecute(Void result) {
/*if (FacultyList.getAdapter() != null) {
if (FacultyList.getAdapter().getCount() == 0) {
FacultyList.setAdapter(facultyListAdapter);
} else
{
facultyListAdapter.notifyDataSetChanged();
}
} else {
FacultyList.setAdapter(facultyListAdapter);
}
progressDialog.dismiss();*/
if (!facultylist.isEmpty()) {
// FacultyList.setVisibiltity(View.VISIBLE) ;
courseEmptyLayout.setVisibility(LinearLayout.GONE);
if (FacultyList.getAdapter() != null)
{
if (FacultyList.getAdapter().getCount() == 0)
{
FacultyList.setAdapter(facultyListAdapter);
}
else
{
facultyListAdapter.notifyDataSetChanged();
}
}
else
{
FacultyList.setAdapter(facultyListAdapter);
}
}else
{
courseEmptyLayout.setVisibility(LinearLayout.VISIBLE);
// FacultyList.setVisibiltity(View.GONE) ;
}
progressDialog.dismiss();
}
}
#Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser && isResumed()) {
new FacultySyncerBg().execute("");
}
}//end*
//**************************WEBSERVICE CODE***********************************
public void Faculty(String programtype)
{
String URL ="http://detelearning.cloudapp.net/det_skill_webservice/service.php?wsdl";
String METHOD_NAMEFACULTY = "getUserInfo";
String NAMESPACEFAC="http://localhost", SOAPACTIONFAC="http://detelearning.cloudapp.net/det_skill_webservice/service.php/getUserInfo";
String faculty[]=new String[4];//changeit
String webprogramtype="flag";
String programname="DESHPANDE SUSANDHI ELECTRICIAN FELLOWSHIP";
// Create request
SoapObject request = new SoapObject(NAMESPACEFAC, METHOD_NAMEFACULTY);
request.addProperty("fellowshipname", programname);
// Create envelope
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
// Set output SOAP object
envelope.setOutputSoapObject(request);
// Create HTTP call object
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try {
//my code Calling Soap Action
androidHttpTransport.call(SOAPACTIONFAC, envelope);
// ArrayList<Faculty> facultylist = new ArrayList<Faculty>();
java.util.Vector<SoapObject> rs = (java.util.Vector<SoapObject>) envelope.getResponse();
if (rs != null)
{
for (SoapObject cs : rs)
{
Faculty rp = new Faculty();
rp.setEmployeename(cs.getProperty(0).toString());//program name
rp.setEmployeeid(cs.getProperty(1).toString());//employee name
facultylist.add(rp);
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}

if (lstView.getAdapter() != null) {
if (lstView.getAdapter().getCount() == 0) {
lstView.setAdapter(finalAdapter);
} else {
finalAdapter.notifyDataSetChanged();
}
} else {
lstView.setAdapter(finalAdapter);
}
and setVisibiltity(View.VISIBLE)for listview
Put this code here
#Override
protected void onPostExecute(Void result) {
if (!facultylist.isEmpty()) {
FacultyList.setVisibiltity(View.VISIBLE) ;
courseEmptyLayout.setVisibility(LinearLayout.GONE);
if (FacultyList.getAdapter() != null) {
if (FacultyList.getAdapter().getCount() == 0) {
FacultyList.setAdapter(facultyListAdapter);
} else {
facultyListAdapter.notifyDataSetChanged();
}
} else {
FacultyList.setAdapter(facultyListAdapter);
}
}else{
courseEmptyLayout.setVisibility(LinearLayout.VISIBLE);
FacultyList.setVisibiltity(View.GONE) ;
}
progressDialog.dismiss();
}

you can try this:
this is the adapter class code.
public class CustomTaskHistory extends ArrayAdapter<String> {
private Activity context;
ArrayList<String> listTasks = new ArrayList<String>();
String fetchRefID;
StringBuilder responseOutput;
ProgressDialog progress;
String resultOutput;
public String getFetchRefID() {
return fetchRefID;
}
public void setFetchRefID(String fetchRefID) {
this.fetchRefID = fetchRefID;
}
public CustomTaskHistory(Activity context, ArrayList<String> listTasks) {
super(context, R.layout.content_main, listTasks);
this.context = context;
this.listTasks = listTasks;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View listViewItem = inflater.inflate(R.layout.list_task_history, null, true);
TextView textViewName = (TextView) listViewItem.findViewById(R.id.textViewName);
LinearLayout linearLayout = (LinearLayout) listViewItem.findViewById(R.id.firstLayout);
//System.out.println("client_id" + _clientID);
//TextView textViewDesc = (TextView) listViewItem.findViewById(R.id.textViewDesc);
//ImageView image = (ImageView) listViewItem.findViewById(R.id.imageView);
if (position % 2 != 0) {
linearLayout.setBackgroundResource(R.color.sky_blue);
} else {
linearLayout.setBackgroundResource(R.color.white);
}
textViewName.setText(listTasks.get(position));
return listViewItem;
}
}
and now in the parent class you must have already added a list view in your xml file so now display code for it is below:
CustomTaskHistory customList = new CustomTaskHistory(TaskHistory.this, task_history_name);
listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(customList);
you can also perform any action on clicking cells of listview.If needed code for it is below add just below the above code:
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent nextScreen2 = new Intent(getApplicationContext(), SubscribeProgrammes.class);
nextScreen2.putExtra("CLIENT_ID", _clientID);
nextScreen2.putExtra("REFERENCE_ID", reference_IDs.get(i));
startActivity(nextScreen2);
Toast.makeText(getApplicationContext(), "You Clicked " + task_list.get(i), Toast.LENGTH_SHORT).show();
}
});

android ListActivity how to populate data with Json Volley Library

android ListActivity how to make Custom Adapter getter setter using ,call json Volley library populate data ListActivity ? could not populate data with Json how to implement ,Please Help me
my code
ItemFragment Class
public class ItemFragment extends ListActivity {
RequestParse requestParse;
MySharedPreferences prefs;
String UsrId;
Context context;
ArrayList<BizForumArticleInfo> list = new ArrayList<>();
private List<BizForumArticleInfo> CountryCodeNumber = new ArrayList<>();
MobileArrayAdapter adapter;
LinearLayoutManager mLayoutManager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_view_android_example);
requestParse = new RequestParse();
prefs = MySharedPreferences.getInstance(this, SESSION);
UsrId = prefs.getString("UsrID", "");
context = getApplicationContext();
setListAdapter(new MobileArrayAdapter(this,0, list));
getJson(60);
}
public void getJson(final int limit){
requestParse.postJson(ConfigApi.postArticleBiz(), new RequestParse.VolleyCallBackPost() {
#Override
public void onSuccess(String result) {
list = parseResponse(result);
}
#Override
public void onRequestError(String errorMessage) {
}
#Override
public Map OnParam(Map<String, String> params) {
params.put("sessionid", UsrId);
params.put("offset", "0");
params.put("limit", String.valueOf(limit));
params.put("viewtype", "all");
params.put("access_token","e3774d357aa7d4bd14e9763b5459ee9cf7ebe36161c142551836ee510d98814a:b349b76b334a94b2");
return params;
}
});
}
public static ArrayList<BizForumArticleInfo> parseResponse(String response) {
ArrayList<BizForumArticleInfo> bizList = new ArrayList<>();
try {
JSONObject json = new JSONObject(response);
JSONArray data = json.getJSONArray(DATA);
for (int i = 0; i < data.length(); i++) {
BizForumArticleInfo ls = new BizForumArticleInfo();
JSONObject item = data.getJSONObject(i);
String ArticleTitle = item.getString("ArticleTitle");
String Article = item.getString("Article");
M.i("===================",ArticleTitle);//working
ls.setArticleTitle(ArticleTitle);
ls.setArticleArticle(Article);
bizList.add(ls);
}
} catch (JSONException e) {
e.printStackTrace();
}
return bizList;
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
String selectedValue = (String) getListAdapter().getItem(position);
Toast.makeText(this, selectedValue, Toast.LENGTH_SHORT).show();
Intent intent = new Intent();
intent.putExtra("selectedValue", selectedValue);
setResult(RESULT_OK, intent);
finish();
//startActivity(new Intent(v.getContext(), MainActivity.class));
}
}
Adapter Class
public class MobileArrayAdapter extends ArrayAdapter<BizForumArticleInfo> {
private Activity activity;
private ArrayList<BizForumArticleInfo> lPerson;
private static LayoutInflater inflater = null;
public MobileArrayAdapter (Activity activity, int textViewResourceId,ArrayList<BizForumArticleInfo> _lPerson) {
super(activity, textViewResourceId, _lPerson);
try {
this.activity = activity;
this.lPerson = _lPerson;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
} catch (Exception e) {
}
}
public int getCount() {
return lPerson.size();
}
public BizForumArticleInfo getItem(BizForumArticleInfo position) {
return position;
}
public long getItemId(int position) {
return position;
}
public static class ViewHolder {
public TextView display_name;
public TextView display_number;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
final ViewHolder holder;
try {
if (convertView == null) {
vi = inflater.inflate(R.layout.list_mobile, null);
holder = new ViewHolder();
holder.display_name = (TextView) vi.findViewById(R.id.label);
vi.setTag(holder);
} else {
holder = (ViewHolder) vi.getTag();
}
holder.display_name.setText(lPerson.get(position).getArticleTitle());
} catch (Exception e) {
}
return vi;
}
}

Doesn't run oncreateview at Fragment after AsyncTask

I'm new in android and stuck at one step, so really need someones help.
I m code for small piece of program, that should parse Json local file, and post it to activity. Image decode with Base64 to Bitmap and given to CustomAdapter(extends Base Adapter). I check program's steps with Log.
AsyncTask make all correct, but in method "Oncreate view" it seems to run nothing.
Her is my code. I m really have no idea , what the problem, help!
My MainFragment+AsyncTask
public class MainFragment extends Fragment {
ArrayList<Bitmap> bitArray;
public MainFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
ListView listview = (ListView)rootView.findViewById(R.id.listViewPost);
Log.v("Pl","1");
listview.setAdapter(new CustomListAdapter(getContext(), bitArray));
listview.setOnItemClickListener(new AdapterView.OnItemClickListener(){
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Toast.makeText(getActivity(), "YESS", Toast.LENGTH_SHORT).show();
}
});
return rootView;
}
#Override
public void onStart() {
super.onStart();
}
private void updatePost() {
FetchPosterTask postTask = new FetchPosterTask(getActivity());
postTask.execute("uk_news.json");
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
updatePost();
}
class FetchPosterTask extends AsyncTask<String, Void, ArrayList<Bitmap>> {
private final String LOG_TAG = FetchPosterTask.class.getSimpleName();
private Context context;
public FetchPosterTask (Context myContext) {
this.context = myContext;
}
#Override
protected ArrayList<Bitmap> doInBackground(String... params) {
if(params.length ==0 ){
return null;
}
String json = null;
try {
json = getJson(params[0]);
} catch (IOException e)
{
e.printStackTrace();
}
try {
String[] masPst = getPosterfromJsonAsString(json);
ArrayList<Bitmap> result =decodeImageToBitmap(masPst);
return result;
}catch (JSONException e){
Log.e(LOG_TAG, "Place 5", e);
}
return null;
}
private String getJson(String filename) throws IOException{
InputStream is = this.context.getAssets().open(filename);
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
return new String(buffer);
}
private String[] getPosterfromJsonAsString(String posterJson) throws JSONException {
final String OWM_NFO = "nfo";
final String OWM_NWS = "nws";
final String OWM_PST = "pst";
JSONObject imageJson = new JSONObject(posterJson);
JSONObject nfoArray = imageJson.getJSONObject(OWM_NFO);
JSONArray nwsArray = nfoArray.getJSONArray(OWM_NWS);
String[] resultStr = new String[nwsArray.length()];
for(int i =0; i<nwsArray.length(); i++){
JSONObject pst = nwsArray.getJSONObject(i);
String im = pst.getString(OWM_PST);
resultStr[i] = im;
}
return resultStr;
}
public ArrayList<Bitmap> decodeImageToBitmap (String[] base64Image) {
ArrayList<Bitmap> bitmapArrayList = new ArrayList<Bitmap>();
for(int i =0; i<4; i++) {
byte[] decodedString = Base64.decode(base64Image[i], Base64.DEFAULT);
Bitmap base64Bitmap = BitmapFactory.decodeByteArray(decodedString, 0,
decodedString.length);
bitmapArrayList.add(i, base64Bitmap);
}
return bitmapArrayList;
}
#Override
protected void onPostExecute(ArrayList<Bitmap> bitmapArrayList) {
if(bitArray == null){
bitArray = new ArrayList<>(bitmapArrayList);
}
else{
for(Bitmap bit: bitmapArrayList){
bitArray.clear();
bitArray.add(bit);
}
}
}
}
}
CustomListAdapter
public class CustomListAdapter extends BaseAdapter {
private final String LOG_TAG = CustomListAdapter.class.getSimpleName();
private ArrayList<Bitmap> bitmapArrayList;
private LayoutInflater layoutInflater;
public CustomListAdapter(Context context, ArrayList<Bitmap> bitmapArrayList) {
this.bitmapArrayList = bitmapArrayList;
this.layoutInflater = LayoutInflater.from(context);
}
#Override
public int getCount() {
return 0;
}
#Override
public Object getItem(int position) {
return bitmapArrayList.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView == null) {
convertView = layoutInflater.inflate(R.layout.list_post_item, null);
holder = new ViewHolder();
holder.imageView = (ImageView) convertView.findViewById(R.id.list_item);
convertView.setTag(holder);
Log.v(LOG_TAG,"1");
}
else {
holder = (ViewHolder) convertView.getTag();
Log.v(LOG_TAG,"2");
}
Log.v(LOG_TAG,"3");
holder.imageView.setImageBitmap((Bitmap)getItem(position));
Log.v(LOG_TAG,"4");
return convertView;
}
static class ViewHolder {
ImageView imageView;
}
}
Layouts
list_post_item
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/list_item"/>
</LinearLayout>
fragment main
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:layout_width="273dp"
android:layout_height="wrap_content"
android:id="#+id/listViewPost" />
</LinearLayout>

Your Adapter Has Not Any Item So Please change That on Adapter
#Override
public int getCount() {
return bitmapArrayList.size();
}
And also call updatePost() methed in onActivityCreated() Mehhed

How to refresh fragment from out of activity or fragment but from baseAdapter class

I have some problem. when I click a delete(btnPlus.setOnClickListener in the interestAdepter class) button from listview baseAdapter, I want to refresh the fragment which contains the listview.
1.InterestAdapter class{edtied}
public class InterestAdapter extends BaseAdapter{
private ArrayList<InterestClass> m_List;
public InterestAdapter() {
m_List = new ArrayList<InterestClass>();
}
#Override
public int getCount() {
return m_List.size();
}
#Override
public Object getItem(int position) {
return m_List.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final int pos = position;
final Context context = parent.getContext();
TextView textName = null;
TextView textDate = null;
TextView textConPrice = null;
TextView textNowPrice = null;
TextView textFog = null;
ImageButton btnPlus = null;
CustomHolder holder = null;
if ( convertView == null ) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.item_interest, parent, false);
textName = (TextView) convertView.findViewById(R.id.i_ProdNmae);
textDate = (TextView) convertView.findViewById(R.id.i_Date);
textConPrice = (TextView) convertView.findViewById(R.id.i_InterPrice);
textNowPrice = (TextView) convertView.findViewById(R.id.i_currentPrice);
textFog = (TextView) convertView.findViewById(R.id.i_Analysis);
btnPlus = (ImageButton) convertView.findViewById(R.id.i_addBtn);
holder = new CustomHolder();
holder.i_TextView = textName;
holder.i_TextView1 = textDate;
holder.i_TextView2 = textConPrice;
holder.i_TextView3 = textNowPrice;
holder.i_TextView4 = textFog;
holder.i_Btn = btnPlus;
convertView.setTag(holder);
}
else {
holder = (CustomHolder) convertView.getTag();
textName = holder.i_TextView;
textDate = holder.i_TextView1;
textConPrice = holder.i_TextView2;
textNowPrice = holder.i_TextView3;
textFog = holder.i_TextView4;
btnPlus = holder.i_Btn;
}
/*if(position == 0) {
textName.setText("종목");
textDate.setText("관심일");
textConPrice.setText("관심가");
textNowPrice.setText("현재가");
textFog.setText("수급");
btnPlus.setEnabled(false);
}else{
}*/
textName.setText(m_List.get(position).getName());
textDate.setText(m_List.get(position).getDate());
textConPrice.setText(m_List.get(position).getConPrice());
textNowPrice.setText(m_List.get(position).getNowPrice());
textFog.setText(m_List.get(position).getFog());
btnPlus.setEnabled(true);
textName.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context,DetailActivity.class);
context.startActivity(intent);
}
});
btnPlus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Crypto enc = new Crypto();
SharedPreferences pref = context.getSharedPreferences("com.rabiaband.pref", 0);
String[] add_Params = new String[2];
try {
add_Params[0] = enc.AES_Encode(pref.getString("no", null), enc.global_deckey);
add_Params[1] = enc.AES_Encode(m_List.get(pos).getJmcode(), enc.global_deckey);
} catch (Exception e) {
Log.e("HomeCryptographError:", "" + e.getMessage());
}
AsyncCallAddDelFavorite delFavorite = new AsyncCallAddDelFavorite();
delFavorite.execute(add_Params);
}
});
private class AsyncCallAddDelFavorite extends AsyncTask<String, Void, Void> {
JSONObject del_Favorite_List;
/* public AsyncCallAddFavorite(HomeFragment home){
this.home=home;
}*/
#Override
protected void onPreExecute() {
/*Log.i(TAG, "onPreExecute");*/
}
#Override
protected Void doInBackground(String... params) {
dbConnection db_Cont=new dbConnection();
String id=params[0];
String jmcode=params[1];
Log.v("doinbackgroud",""+id+"ssssss"+jmcode);
del_Favorite_List=db_Cont.delFavorite(id, jmcode);
Log.v("doinbackgroud",del_Favorite_List.toString());
return null;
}
#Override
protected void onPostExecute(Void result) {
/*Log.i(TAG, "onPostExecute");*/
}
}
}
2.InterestFragment{edited}
public class InterestFragment extends Fragment {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
private ListView interest_ListView;
private InterestAdapter interest_Adapter;
String TAG="response";
RbPreference keep_Login;
public InterestFragment() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #param param1 Parameter 1.
* #param param2 Parameter 2.
* #return A new instance of fragment InterestFragment.
*/
// TODO: Rename and change types and number of parameters
public static InterestFragment newInstance(String param1, String param2) {
InterestFragment fragment = new InterestFragment();
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) {
keep_Login = new RbPreference(getContext());
Log.v("interFrag","oncreate");
// Inflate the layout for this fragment
/*if(keep_Login.get("name",null)!=null) {
return inflater.inflate(R.layout.fragment_interest, container, false);
}else{
return inflater.inflate(R.layout.need_login, container, false);
}*/
return inflater.inflate(R.layout.fragment_interest, container, false);
}
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.v("ListFragment", "onActivityCreated().");
Log.v("ListsavedInstanceState", savedInstanceState == null ? "true" : "false");
if(keep_Login.get("no",null)!=null) {
String enc_Id="";
Crypto enc=new Crypto();
try{
enc_Id=enc.AES_Encode(keep_Login.get("no",null),enc.global_deckey);
}catch(Exception e){
}
interest_Adapter = new InterestAdapter();
interest_ListView = (ListView) getView().findViewById(R.id.i_ListView);
AsyncCallInterest task = new AsyncCallInterest();
task.execute(enc_Id);
}
}
private class AsyncCallInterest extends AsyncTask<String, Void, JSONArray> {
JSONArray interest_Array;
InterestFragment interest;
#Override
protected void onPreExecute() {
Log.i(TAG, "onPreExecute");
}
#Override
protected JSONArray doInBackground(String... params) {
String id=params[0];
dbConnection db_Cont=new dbConnection();
interest_Array=db_Cont.getFavorite(id);
Log.v("doinbackgroud", interest_Array.toString());
return interest_Array;
}
#Override
protected void onPostExecute(JSONArray result) {
try{
for (int i = 0 ; i < result.length() ; i ++){
InterestClass i_Class = new InterestClass();
String date=result.getJSONObject(i).getString("indate");
String time=date.substring(5,date.length());
i_Class.setJmcode(result.getJSONObject(i).getString("jmcode"));
i_Class.setName(result.getJSONObject(i).getString("jmname"));
i_Class.setDate(time);
i_Class.setConPrice(result.getJSONObject(i).getString("fprice"));
i_Class.setNowPrice(result.getJSONObject(i).getString("price"));
i_Class.setFog("40");
i_Class.setPlus(true);
interest_Adapter.add(i_Class);
}
interest_ListView.setAdapter(interest_Adapter);
}catch(Exception e){
Toast.makeText(getActivity(), "interest"+e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}
}
Is there any way to refresh the fragment from the button in baseAdapter class? I searched a lot but I couldn't fine answer. Please help me, Thank you.
{edited}
I add AsyncCallAddDelFavorite class and AsyncCallInterest class. Thank you.

Update your adapter constructor. After deleting content, remove the item from the arraylist and notify dataset changed.
public class InterestAdapter extends BaseAdapter{
private ArrayList<InterestClass> m_List;
private Context mContext;
public InterestAdapter(Context context, ArrayList<InterestClass> list) {
m_List = list;
mContext = context;
}
#Override
public int getCount() {
return m_List.size();
}
#Override
public Object getItem(int position) {
return m_List.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final int pos = position;
final Context context = parent.getContext();
TextView textName = null;
TextView textDate = null;
TextView textConPrice = null;
TextView textNowPrice = null;
TextView textFog = null;
ImageButton btnPlus = null;
CustomHolder holder = null;
if ( convertView == null ) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.item_interest, parent, false);
textName = (TextView) convertView.findViewById(R.id.i_ProdNmae);
textDate = (TextView) convertView.findViewById(R.id.i_Date);
textConPrice = (TextView) convertView.findViewById(R.id.i_InterPrice);
textNowPrice = (TextView) convertView.findViewById(R.id.i_currentPrice);
textFog = (TextView) convertView.findViewById(R.id.i_Analysis);
btnPlus = (ImageButton) convertView.findViewById(R.id.i_addBtn);
holder = new CustomHolder();
holder.i_TextView = textName;
holder.i_TextView1 = textDate;
holder.i_TextView2 = textConPrice;
holder.i_TextView3 = textNowPrice;
holder.i_TextView4 = textFog;
holder.i_Btn = btnPlus;
convertView.setTag(holder);
}
else {
holder = (CustomHolder) convertView.getTag();
textName = holder.i_TextView;
textDate = holder.i_TextView1;
textConPrice = holder.i_TextView2;
textNowPrice = holder.i_TextView3;
textFog = holder.i_TextView4;
btnPlus = holder.i_Btn;
}
/*if(position == 0) {
textName.setText("종목");
textDate.setText("관심일");
textConPrice.setText("관심가");
textNowPrice.setText("현재가");
textFog.setText("수급");
btnPlus.setEnabled(false);
}else{
}*/
textName.setText(m_List.get(position).getName());
textDate.setText(m_List.get(position).getDate());
textConPrice.setText(m_List.get(position).getConPrice());
textNowPrice.setText(m_List.get(position).getNowPrice());
textFog.setText(m_List.get(position).getFog());
btnPlus.setEnabled(true);
textName.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context,DetailActivity.class);
context.startActivity(intent);
}
});
btnPlus.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Crypto enc = new Crypto();
SharedPreferences pref = context.getSharedPreferences("com.rabiaband.pref", 0);
String[] add_Params = new String[2];
try {
add_Params[0] = enc.AES_Encode(pref.getString("no", null), enc.global_deckey);
add_Params[1] = enc.AES_Encode(m_List.get(pos).getJmcode(), enc.global_deckey);
} catch (Exception e) {
Log.e("HomeCryptographError:", "" + e.getMessage());
}
AsyncCallAddDelFavorite delFavorite = new AsyncCallAddDelFavorite();
delFavorite.execute(add_Params);
**m_List.remove(position);
notifyDatasetChanged();**
}
});
private class AsyncCallAddDelFavorite extends AsyncTask<String, Void, Void> {
JSONObject del_Favorite_List;
/* public AsyncCallAddFavorite(HomeFragment home){
this.home=home;
}*/
#Override
protected void onPreExecute() {
/*Log.i(TAG, "onPreExecute");*/
}
#Override
protected Void doInBackground(String... params) {
dbConnection db_Cont=new dbConnection();
String id=params[0];
String jmcode=params[1];
Log.v("doinbackgroud",""+id+"ssssss"+jmcode);
del_Favorite_List=db_Cont.delFavorite(id, jmcode);
Log.v("doinbackgroud",del_Favorite_List.toString());
return null;
}
#Override
protected void onPostExecute(Void result) {
/*Log.i(TAG, "onPostExecute");*/
}
}
}
Update Adapter initialization in fragment. You are adding item to adapter directly. Use arraylist and after downloading data create adapter instance.
private ArrayList<InterestClass> interestList = new ArrayList<>();
and update your onPostExecute Method
#Override
protected void onPostExecute(JSONArray result) {
try{
for (int i = 0 ; i < result.length() ; i ++){
InterestClass i_Class = new InterestClass();
String date=result.getJSONObject(i).getString("indate");
String time=date.substring(5,date.length());
i_Class.setJmcode(result.getJSONObject(i).getString("jmcode"));
i_Class.setName(result.getJSONObject(i).getString("jmname"));
i_Class.setDate(time);
i_Class.setConPrice(result.getJSONObject(i).getString("fprice"));
i_Class.setNowPrice(result.getJSONObject(i).getString("price"));
i_Class.setFog("40");
i_Class.setPlus(true);
interestList.add(i_Class);
}
interest_Adapter = new InterestAdapter(getActivity,interestList);
interest_ListView.setAdapter(interest_Adapter);
}catch(Exception e){
Toast.makeText(getActivity(), "interest"+e.getMessage(), Toast.LENGTH_SHORT).show();
}
}

If I understand you correctly you want to remove the item from your ListView too after your removing it from your Database, to achieve that you can call this
m_List.remove(position);
interest_Adapter..notifyDataSetChanged();
First line removes the item and Second one will insure that the Adapter gets updated after the item has been removed.
Hope this helps

ListView not displaying data in fragment

I am using listview to populate data coming from the server. This listview will show that data in a fragmentTab. Now the data is parsing fine and logcat is also showing the data. But the data is not being populated by listview. I tried to see the error through debugging but there is no problem. Even the Holder in adapter catches the data but it's not displayed. I don't know what the problem is. I tried the following questions but didn't got the answer.
Android - ListView in Fragment does not showing up
Android - ListView in Fragment does not show
ListView in Fragment Not Displayed
Below is my fragment and the adapter.
Tastemaker Fragment:
public class TasteMakersFragment extends Fragment
{
CommonClass commonTasteMakers;
String tasteMaker_url = CommonClass.url+ URLConstants.Host.URL_ALL_SUGGESTED_TASTEMAKERS;
String user_token = "8aa0dcd5aaf54c8a5aaef1aa242f342f";
ListView suggested_list;
List<SuggestedUserModel> suggestedUsers_list = new ArrayList<>();
SuggestedUsersAdapter mAdapter;
int selectedPosition = 0;
public TasteMakersFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View v = inflater.from(getActivity()).inflate(R.layout.suggested_users_tastemakers, null);
commonTasteMakers = new CommonClass(getActivity().getApplicationContext());
suggested_list = (ListView)v.findViewById(R.id.lst_suggestedUsers);
new GetSuggestedUsers().execute(tasteMaker_url);
return v;
}
#Override
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
}
private class GetSuggestedUsers extends AsyncTask< String, Void, Void>
{
private ProgressDialog Dialog = new ProgressDialog(getActivity());
protected void onPreExecute() {
if (suggestedUsers_list.isEmpty())
{
Dialog = ProgressDialog.show(getActivity(),"Please be patient!","Fetching for first time...");
}
}
#Override
protected Void doInBackground(String... params)
{
if (suggestedUsers_list.isEmpty())
{
getSuggestedUsers();
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
else{
Log.d("---- Already Fetched --", "---- Already Fetched ----");
return null;
}
}
protected void onPostExecute(Void unused)
{
Dialog.dismiss();
mAdapter = new SuggestedUsersAdapter(getActivity(), suggestedUsers_list);
suggested_list.setAdapter(mAdapter);
suggested_list.setSelection(selectedPosition);
mAdapter.notifyDataSetChanged();
//startMainActivity();
}
}
private List<SuggestedUserModel> getSuggestedUsers()
{
StringRequest postRequest = new StringRequest(Request.Method.POST, tasteMaker_url, new Response.Listener<String>()
{
#Override
public void onResponse(String response)
{
try {
//JSONObject jsonResponse = new JSONObject(response).getJSONObject("form");
JSONObject jsonResponse = new JSONObject(response);
if (jsonResponse.has("data"))
{
JSONObject data = jsonResponse.getJSONObject("data");
String code = jsonResponse.getString("code");
if(code.equals("200"))
{
if(data.has("tasteMakers"))
{
JSONArray tastemakers = data.getJSONArray("tasteMakers");
for (int i =0; i<tastemakers.length(); i++)
{
JSONObject jsnObj = tastemakers.getJSONObject(i);
String id = jsnObj.getString("userId");
String name = jsnObj.getString("name");
String profilePic = jsnObj.getString("imgUrl");
Boolean isFollowed = jsnObj.getBoolean("isFollowed");
suggestedUsers_list.add(new SuggestedUserModel(id,
name,
profilePic,
isFollowed));
Log.d("Names are ----", "size is=" + name +" and their id are: "+id);
}
// Log.d("Adapter list ----", "size is=" + suggestedUsers_list.size());
}
}
else {
Log.d("Error0 Error Error", "response------:" + jsonResponse);
}
}
// Log.d("response222---------","response22222------:"+jsonResponse);
} catch (JSONException e) {
Log.d("-----Stop------", "!!!");
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
}
) {
#Override
protected Map<String, String> getParams()
{
Map<String, String> params = new HashMap<>();
// the POST parameters:
params.put("sessionToken", user_token);
return params;
} };
postRequest.setRetryPolicy(new DefaultRetryPolicy(20000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
Volley.newRequestQueue(getActivity().getApplicationContext()).add(postRequest);
return suggestedUsers_list;
}
}
Adapter Class:
public class SuggestedUsersAdapter extends BaseAdapter {
Context context;
int count = 1;
private List<SuggestedUserModel> allUsers;
public SuggestedUsersAdapter(FragmentActivity activity, List<SuggestedUserModel> suggestUserModel)
{
Log.d("Custom Adapter called", "" + suggestUserModel.size());
context = activity;
allUsers = suggestUserModel;
//FragmentActivity mActivity = activity;
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return allUsers.size();
// return imageId.length;
}
#Override
public Object getItem(int position) {
return allUsers.get(position);
// return position;
}
#Override
public long getItemId(int position) {
return position;
}
#SuppressLint({"ViewHolder", "InflateParams", "CutPasteId"})
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
final mHolder holder;
// int type = getItemViewType(position);
LayoutInflater layoutInflater;
getItemViewType(position);
if (convertView == null)
{
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.suggested_users_tastemaker_cell, null);
holder = new mHolder();
// convertView.setTag(mFeedsListItemViewHolder);
holder.txt_suggestUserName = (TextView) convertView.findViewById(R.id.tv_tasteMakerName);
holder.imgV_userProfile = (ImageView) convertView.findViewById(R.id.imgBtn_tasteMaker_pic);
holder.btnFollow = (Button) convertView.findViewById(R.id.btnFollow_tasteMaker);
holder.btnFollowing = (Button) convertView.findViewById(R.id.btnFollowing);
convertView.setTag(holder);
} else {
holder = (mHolder) convertView.getTag();
}
final SuggestedUserModel suggestUser = allUsers.get(position);
holder.txt_suggestUserName.setText(allUsers.get(position).getSuggested_UserName());
/*if(suggestUser.getSuggested_UserImage().equals(""))
{
Picasso
.with(context)
.load(R.mipmap.ic_launcher)
.transform(new CropSquareTransformationHomePage())
.into(holder.imgV_userProfile);
}
else {
Picasso
.with(context)
.load(suggestUser.getSuggested_UserImage())
.transform(new CropSquareTransformationHomePage())
.into(holder.imgV_userProfile);
}*/
holder.pos = position;
//mFeedsListItemViewHolder.setData(allPersons.get(position));
return convertView;
}
private class mHolder {
TextView txt_suggestUserName;
ImageView imgV_userProfile;
Button btnFollow;
Button btnFollowing;
int pos;
}
}
Note: I already tried declaring listview and assigning adapter in onActivityCreated() method of fragment but no effect.
Any Help will be appreciated.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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