Android ListView not being populated by custom ParseQueryAdapter

Android ListView not being populated by custom ParseQueryAdapter - java

for an app I am making I am attempting to populate a listView with data obtained from parse.com using a custom parsequeryadapter subclass. Basically it just shows a blank activity when opening the activity.
Adapter code
package com.example.battlesim;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseQuery;
import com.parse.ParseQueryAdapter;
import com.parse.ParseObject;
public class LeaderboardAdapter extends ParseQueryAdapter<ParseObject> {
public Context context;
public LeaderboardAdapter(Context c) {
super(c, new ParseQueryAdapter.QueryFactory<ParseObject>(){
public ParseQuery<ParseObject> create(){
// public final ArrayList<String> leadersName;
// public final ArrayList<Integer> leadersScore;
ParseQuery<ParseObject> queryL = ParseQuery.getQuery("Character");
queryL = queryL.whereNotEqualTo("name", null);
queryL = queryL.orderByDescending("level");
queryL.setLimit(10);
try {
queryL.find();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return queryL;
// queryL.findInBackground(new FindCallback<ParseObject>() {
// public void done(List<ParseObject> scoreList, ParseException e) {
// if (e == null) {
// for(int i = 0; i < 10; i++){
// leadersName.add(scoreList.get(i).getString("name"));
// leadersScore.add(scoreList.get(i).getInt("level"));
// }
// } else {
// Log.d("level", "Error: " + e.getMessage());
// }
// }
}
});
this.context = c;
}
public View getItemView(ParseObject o, View convertView, ViewGroup parent){
View vi = convertView;
if(convertView == null) vi = View.inflate(getContext(), R.layout.board, null);
super.getItemView(o, convertView, parent);
TextView name = (TextView) vi.findViewById(R.id.name);
TextView level = (TextView) vi.findViewById(R.id.level);
name.setText(o.getString("name"));
level.setText(o.getInt("level"));
return vi;
}
}
Activity onCreate code
LeaderboardAdapter adapter = new LeaderboardAdapter(this);
adapter.loadObjects();
ListView lv = (ListView) findViewById(R.id.listView1);
lv.setAdapter(adapter);
Board.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="TextView"
android:textSize="25dip"/>
<TextView
android:id="#+id/level"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="TextView"
android:textSize="25dip"/>
</RelativeLayout>
Sorry if I formatted anything oddly or forgot to include anything. I'm new to StackExchange and somewhat new to Android programming

Replace queryL.whereNotEqualTo("name", null); with queryL.whereExists("name");

Related

click on textview on listview on fragment

click on textview on listview on fragment
TextView On category_row.xml textViewCategoryName
onclick SetText this textViewCategoryName ok!
CategoriesFragment.java
package com.example;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.widget.ContentLoadingProgressBar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import com.example.adapter.CategoryArrayAdapter;
import com.example.model.CategoryDataModel;
import com.example.parser.JSONParser;
import com.example.utils.Keys;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class CategoriesFragment extends Fragment {
private ListView listView;
private ArrayList<CategoryDataModel> list;
private CategoryArrayAdapter adapter;
private TextView categoryCurrent;
public CategoriesFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_categories, null);
return rootView;
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
/**
* Array List for Binding Data from JSON to this List
*/
list = new ArrayList<>();
adapter = new CategoryArrayAdapter(getActivity(), list);
/**
* Getting List and Setting List Adapter
*/
listView = (ListView) getActivity().findViewById(R.id.listView);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Snackbar.make(getActivity().findViewById(R.id.parentLayout), list.get(position).getCategoryName(), Snackbar.LENGTH_LONG).show();
}
});
/**
* Check internet connection
*/
//if (InternetConnection.checkConnection(getApplicationContext())) {
new GetDataCategories().execute();
//} else {
//Snackbar.make(getActivity().findViewById(R.id.parentLayout), "اتصال به اینترنت برقرار نیست", Snackbar.LENGTH_LONG).show();
//}
}
/**
* Creating Get Data Task for Getting Data From Web
*/
class GetDataCategories extends AsyncTask<Void, Void, Void> {
ContentLoadingProgressBar progressBar;
#Override
protected void onPreExecute() {
super.onPreExecute();
/**
* Progress Bar for User Interaction
*/
progressBar = (ContentLoadingProgressBar) getActivity().findViewById(R.id.progress);
progressBar.show();
}
#Nullable
#Override
protected Void doInBackground(Void... params) {
/**
* Getting JSON Object from Web Using okHttp
*/
JSONObject jsonObject = JSONParser.getDataFromWeb("http://example.com/api-service/v1/platform_categories/");
try {
/**
* Check Whether Its NULL???
*/
if (jsonObject != null) {
/**
* Check Length...
*/
if(jsonObject.length() > 0) {
/**
* Getting Array named "Categories" From MAIN Json Object
*/
JSONArray array = jsonObject.getJSONArray(Keys.KEY_CATEGORIES);
/**
* Check Length of Array...
*/
int lenArray = array.length();
if(lenArray > 0) {
for(int jIndex = 0; jIndex < lenArray; jIndex++) {
/**
* Creating Every time New Object
* and
* Adding into List
*/
CategoryDataModel model = new CategoryDataModel();
/**
* Getting Inner Object from contacts array...
* and
* From that We will get Name of that Contact
*
*/
JSONObject innerObject = array.getJSONObject(jIndex);
String category_name = innerObject.getString(Keys.KEY_CATEGORY_NAME);
String category_link = innerObject.getString(Keys.KEY_CATEGORY_LINK);
/**
* Getting Object from Object "other"
*/
//JSONObject otherObject = innerObject.getJSONObject(Keys.KEY_NAME);
//String other = otherObject.getString(Keys.KEY_NAME_SUB);
model.setCategoryName(category_name);
model.setCategoryLink(category_link);
/**
* Adding data in List...
*/
list.add(model);
}
}
}
} else {
}
} catch (JSONException je) {
Log.i(JSONParser.TAG, "" + je.getLocalizedMessage());
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
/**
* Progress Bar for User Interaction
*/
progressBar.hide();
/**
* Checking if List size if more than zero then
* Update ListView
*/
if(list.size() > 0) {
adapter.notifyDataSetChanged();
} else {
Snackbar.make(getActivity().findViewById(R.id.parentLayout), "مشکلی در اتصال به سرورهای سخنک رخ داده است!", Snackbar.LENGTH_LONG).show();
}
}
}
}
CategoryArrayAdapter.java
package com.example.adapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.example.R;
import com.example.model.CategoryDataModel;
import java.util.List;
public class CategoryArrayAdapter extends ArrayAdapter<CategoryDataModel> {
List<CategoryDataModel> modelList;
Context context;
private LayoutInflater mInflater;
// Constructors
public CategoryArrayAdapter(Context context, List<CategoryDataModel> objects) {
super(context, 0, objects);
this.context = context;
this.mInflater = LayoutInflater.from(context);
modelList = objects;
}
#Override
public CategoryDataModel getItem(int position) {
return modelList.get(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder vh;
if (convertView == null) {
View view = mInflater.inflate(R.layout.category_row, parent, false);
vh = ViewHolder.create((RelativeLayout) view);
view.setTag(vh);
} else {
vh = (ViewHolder) convertView.getTag();
}
CategoryDataModel item = getItem(position);
vh.textViewCategoryName.setText(item.getCategoryName());
return vh.rootView;
}
private static class ViewHolder {
public final RelativeLayout rootView;
public final TextView textViewCategoryName;
private ViewHolder(RelativeLayout rootView, TextView textViewCategoryName) {
this.rootView = rootView;
this.textViewCategoryName = textViewCategoryName;
}
public static ViewHolder create(RelativeLayout rootView) {
TextView textViewCategoryName = (TextView) rootView.findViewById(R.id.textViewCategoryName);
return new ViewHolder(rootView, textViewCategoryName);
}
}
}
fragment_categories.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:id="#+id/parentLayout"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.v4.widget.ContentLoadingProgressBar
android:id="#+id/progress"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:visibility="visible" />
<ListView app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:id="#+id/listView"
android:layout_width="fill_parent"
android:layout_height="match_parent" />
</android.support.design.widget.CoordinatorLayout>
category_row.xml
<?xml version="1.0" encoding="utf-8"?>
<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="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_centerVertical="true"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/imageViewProfilePhoto">
<TextView
android:id="#+id/textViewCategoryName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:textAppearance="?android:textAppearanceSmall"
android:textIsSelectable="true"
tools:text="Quote Content" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="right"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
</LinearLayout>
</LinearLayout>
</RelativeLayout>

You have to set an onClickListener to your TextView in your ViewHolder.
private static class ViewHolder {
public final RelativeLayout rootView;
public final TextView textViewCategoryName;
private ViewHolder(RelativeLayout rootView, TextView textViewCategoryName) {
this.rootView = rootView;
this.textViewCategoryName = textViewCategoryName;
}
public static ViewHolder create(RelativeLayout rootView) {
TextView textViewCategoryName = (TextView) rootView.findViewById(R.id.textViewCategoryName);
textViewCategoryName.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// Do whatever you want
}
});
return new ViewHolder(rootView, textViewCategoryName);
}
}

Toast On ArrayAdapter

Toast On ArrayAdapter
How to Show Toast message On QuoteArrayAdapter OnClick textViewQuoteLike
Show message Like is Done
public static ViewHolder create(RelativeLayout rootView) {
ImageView imageViewProfilePhoto = (ImageView) rootView.findViewById(R.id.imageViewProfilePhoto);
TextView textViewQuoteContent = (TextView) rootView.findViewById(R.id.textViewQuoteContent);
TextView textViewProfileName = (TextView) rootView.findViewById(R.id.textViewProfileName);
final TextView textViewQuoteLike = (TextView) rootView.findViewById(R.id.textViewQuoteLike);
TextView textViewQuoteCopy = (TextView) rootView.findViewById(R.id.textViewQuoteCopy);
TextView textViewQuoteShare = (TextView) rootView.findViewById(R.id.textViewQuoteShare);
final TextView textViewQuoteId = (TextView) rootView.findViewById(R.id.textViewQuoteId);
textViewQuoteLike.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new GetDataLike().execute(textViewQuoteId.getText().toString());
String currentLike = textViewQuoteLike.getText().toString();
currentLike = currentLike.replace("پسندیدم (","");;
currentLike = currentLike.replace(")","");;
int newLike = Integer.valueOf(currentLike.toString()) + 1;
textViewQuoteLike.setText("پسندیدم ("+newLike+")");
/*Toast.makeText(Need Activity, "Like is done.",
Toast.LENGTH_LONG).show();*/
}
});
return new ViewHolder(rootView, imageViewProfilePhoto, textViewQuoteContent, textViewProfileName, textViewQuoteLike, textViewQuoteCopy, textViewQuoteShare, textViewQuoteId);
}
If there is a way that in HomeFragment Put it, Please give an example
QuoteArrayAdapter.java
package com.example.adapter;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.AsyncTask;
import android.support.annotation.Nullable;
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.RelativeLayout;
import android.widget.TextView;
import com.example.R;
import com.example.model.QuoteDataModel;
import com.example.parser.JSONParser;
import com.example.utils.Keys;
import com.squareup.picasso.Picasso;
import com.squareup.picasso.Transformation;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.List;
public class QuoteArrayAdapter extends ArrayAdapter<QuoteDataModel> {
List<QuoteDataModel> modelList;
Context context;
private LayoutInflater mInflater;
// Constructors
public QuoteArrayAdapter(Context context, List<QuoteDataModel> objects) {
super(context, 0, objects);
this.context = context;
this.mInflater = LayoutInflater.from(context);
modelList = objects;
}
#Override
public QuoteDataModel getItem(int position) {
return modelList.get(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder vh;
if (convertView == null) {
View view = mInflater.inflate(R.layout.quote_row, parent, false);
vh = ViewHolder.create((RelativeLayout) view);
view.setTag(vh);
} else {
vh = (ViewHolder) convertView.getTag();
}
QuoteDataModel item = getItem(position);
vh.textViewQuoteContent.setText(item.getQuoteContent());
vh.textViewProfileName.setText(item.getProfileName());
vh.textViewQuoteLike.setText("پسندیدم ("+item.getQuoteLike()+")");
vh.textViewQuoteCopy.setText("کپی کردن");
vh.textViewQuoteShare.setText("اشتراک گزاری");
vh.textViewQuoteId.setText(item.getQuoteId());
Picasso.with(context).load(item.getProfilePhoto()).placeholder(R.drawable.empty_profile_photo).error(R.drawable.empty_profile_photo).transform(new CircleTransform()).into(vh.imageViewProfilePhoto);
return vh.rootView;
}
private static class ViewHolder {
public final RelativeLayout rootView;
public final ImageView imageViewProfilePhoto;
public final TextView textViewQuoteContent;
public final TextView textViewProfileName;
public final TextView textViewQuoteLike;
public final TextView textViewQuoteCopy;
public final TextView textViewQuoteShare;
public final TextView textViewQuoteId;
private ViewHolder(RelativeLayout rootView, ImageView imageViewProfilePhoto, TextView textViewQuoteContent, TextView textViewProfileName, TextView textViewQuoteLike, TextView textViewQuoteCopy, TextView textViewQuoteShare, TextView textViewQuoteId) {
this.rootView = rootView;
this.imageViewProfilePhoto = imageViewProfilePhoto;
this.textViewQuoteContent = textViewQuoteContent;
this.textViewProfileName = textViewProfileName;
this.textViewQuoteLike = textViewQuoteLike;
this.textViewQuoteCopy = textViewQuoteCopy;
this.textViewQuoteShare = textViewQuoteShare;
this.textViewQuoteId = textViewQuoteId;
}
public static ViewHolder create(RelativeLayout rootView) {
ImageView imageViewProfilePhoto = (ImageView) rootView.findViewById(R.id.imageViewProfilePhoto);
TextView textViewQuoteContent = (TextView) rootView.findViewById(R.id.textViewQuoteContent);
TextView textViewProfileName = (TextView) rootView.findViewById(R.id.textViewProfileName);
final TextView textViewQuoteLike = (TextView) rootView.findViewById(R.id.textViewQuoteLike);
TextView textViewQuoteCopy = (TextView) rootView.findViewById(R.id.textViewQuoteCopy);
TextView textViewQuoteShare = (TextView) rootView.findViewById(R.id.textViewQuoteShare);
final TextView textViewQuoteId = (TextView) rootView.findViewById(R.id.textViewQuoteId);
textViewQuoteLike.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new GetDataLike().execute(textViewQuoteId.getText().toString());
String currentLike = textViewQuoteLike.getText().toString();
currentLike = currentLike.replace("پسندیدم (","");;
currentLike = currentLike.replace(")","");;
int newLike = Integer.valueOf(currentLike.toString()) + 1;
textViewQuoteLike.setText("پسندیدم ("+newLike+")");
}
});
return new ViewHolder(rootView, imageViewProfilePhoto, textViewQuoteContent, textViewProfileName, textViewQuoteLike, textViewQuoteCopy, textViewQuoteShare, textViewQuoteId);
}
}
static class GetDataLike extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Nullable
#Override
protected String doInBackground(String... params) {
String quoteId = params[0];
JSONObject jsonObject = JSONParser.getDataFromWeb("http://example.com/api-service/v1/platform_quote_like/?platform=true&id="+quoteId);
try {
if (jsonObject != null) {
if(jsonObject.length() > 0) {
JSONArray array = jsonObject.getJSONArray(Keys.KEY_LIKE);
int lenArray = array.length();
if(lenArray > 0) {
for(int jIndex = 0; jIndex < lenArray; jIndex++) {
JSONObject innerObject = array.getJSONObject(jIndex);
String quote_like = innerObject.getString(Keys.KEY_QUOTE_LIKE);
return quote_like;
}
}
}
} else {
}
} catch (JSONException je) {
Log.i(JSONParser.TAG, "" + je.getLocalizedMessage());
}
return null;
}
#Override
protected void onPostExecute(String aVoid) {
super.onPostExecute(aVoid);
}
}
public class CircleTransform implements Transformation {
#Override
public Bitmap transform(Bitmap source) {
int size = Math.min(source.getWidth(), source.getHeight());
int x = (source.getWidth() - size) / 2;
int y = (source.getHeight() - size) / 2;
Bitmap squaredBitmap = Bitmap.createBitmap(source, x, y, size, size);
if (squaredBitmap != source) {
source.recycle();
}
Bitmap bitmap = Bitmap.createBitmap(size, size, source.getConfig());
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
BitmapShader shader = new BitmapShader(squaredBitmap,
BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
paint.setShader(shader);
paint.setAntiAlias(true);
float r = size / 2f;
canvas.drawCircle(r, r, r, paint);
squaredBitmap.recycle();
return bitmap;
}
#Override
public String key() {
return "circle";
}
}
}
HomeFragment.java
package com.example;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.widget.ContentLoadingProgressBar;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.example.adapter.QuoteArrayAdapter;
import com.example.model.QuoteDataModel;
import com.example.parser.JSONParser;
import com.example.utils.Keys;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class HomeFragment extends Fragment {
private ListView listView;
private ArrayList<QuoteDataModel> list;
private QuoteArrayAdapter adapter;
private TextView likeCurrent;
public HomeFragment() {
// Required empty public constructor
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_home, null);
return rootView;
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
/**
* Array List for Binding Data from JSON to this List
*/
list = new ArrayList<>();
adapter = new QuoteArrayAdapter(getActivity(), list);
/**
* Getting List and Setting List Adapter
*/
listView = (ListView) getActivity().findViewById(R.id.listView);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Snackbar.make(getActivity().findViewById(R.id.parentLayout), list.get(position).getProfileName() + " => " + list.get(position).getQuoteLike(), Snackbar.LENGTH_LONG).show();
}
});
/**
* Check internet connection
*/
if (!MainActivity.NetworkUtil.isOnline(getActivity().getApplicationContext())) {
Toast.makeText(getActivity(), "اتصال به اینترنت برقرار نیست",
Toast.LENGTH_LONG).show();
}
new GetDataHome().execute();
listView.setOnScrollListener(new AbsListView.OnScrollListener() {
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if(firstVisibleItem+visibleItemCount == totalItemCount && totalItemCount!=0)
{
new GetDataHome().execute();
}
}
});
/*
likeCurrent = (TextView) getActivity().findViewById(R.id.textViewQuoteLike);
likeCurrent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
likeCurrent.setText("Boiling Point K");
}
});*/
}
/**
* Creating Get Data Task for Getting Data From Web
*/
class GetDataHome extends AsyncTask<Void, Void, Void> {
ContentLoadingProgressBar progressBar;
#Override
protected void onPreExecute() {
super.onPreExecute();
/**
* Progress Bar for User Interaction
*/
progressBar = (ContentLoadingProgressBar) getActivity().findViewById(R.id.progress);
progressBar.show();
}
#Nullable
#Override
protected Void doInBackground(Void... params) {
/**
* Getting JSON Object from Web Using okHttp
*/
JSONObject jsonObject = JSONParser.getDataFromWeb("http://example.com/api-service/v1/platform_home/?platform=true");
try {
/**
* Check Whether Its NULL???
*/
if (jsonObject != null) {
/**
* Check Length...
*/
if(jsonObject.length() > 0) {
/**
* Getting Array named "Home" From MAIN Json Object
*/
JSONArray array = jsonObject.getJSONArray(Keys.KEY_HOME);
/**
* Check Length of Array...
*/
int lenArray = array.length();
if(lenArray > 0) {
for(int jIndex = 0; jIndex < lenArray; jIndex++) {
/**
* Creating Every time New Object
* and
* Adding into List
*/
QuoteDataModel model = new QuoteDataModel();
/**
* Getting Inner Object from contacts array...
* and
* From that We will get Name of that Contact
*
*/
JSONObject innerObject = array.getJSONObject(jIndex);
String profile_photo = innerObject.getString(Keys.KEY_PROFILE_PHOTO);
String profile_name = innerObject.getString(Keys.KEY_PROFILE_NAME);
String profile_link = innerObject.getString(Keys.KEY_PROFILE_LINK);
String quote_like = innerObject.getString(Keys.KEY_QUOTE_LIKE);
String quote_id = innerObject.getString(Keys.KEY_QUOTE_ID);
String quote_content = innerObject.getString(Keys.KEY_QUOTE_CONTENT);
String quote_category = innerObject.getString(Keys.KEY_QUOTE_CATEGORY);
/**
* Getting Object from Object "other"
*/
//JSONObject otherObject = innerObject.getJSONObject(Keys.KEY_NAME);
//String other = otherObject.getString(Keys.KEY_NAME_SUB);
model.setProfilePhoto(profile_photo);
model.setProfileName(profile_name);
model.setProfileLink(profile_link);
model.setQuoteLike(quote_like);
model.setQuoteId(quote_id);
model.setQuoteContent(quote_content);
model.setQuoteCategory(quote_category);
/**
* Adding data in List...
*/
list.add(model);
}
}
}
} else {
}
} catch (JSONException je) {
Log.i(JSONParser.TAG, "" + je.getLocalizedMessage());
}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
/**
* Progress Bar for User Interaction
*/
progressBar.hide();
/**
* Checking if List size if more than zero then
* Update ListView
*/
if(list.size() > 0) {
adapter.notifyDataSetChanged();
} else {
Snackbar.make(getActivity().findViewById(R.id.parentLayout), "مشکلی در اتصال به سرورهای سخنک رخ داده است!", Snackbar.LENGTH_LONG).show();
}
}
}
}
quote_row.xml
<?xml version="1.0" encoding="utf-8"?>
<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="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/imageViewProfilePhoto"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_margin="5dp"
android:layout_gravity="right"
android:layout_alignParentRight="true"
android:src="#drawable/empty_profile_photo" />
<LinearLayout
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_centerVertical="true"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/imageViewProfilePhoto">
<TextView
android:id="#+id/textViewQuoteContent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:textAppearance="?android:textAppearanceSmall"
android:textIsSelectable="true"
tools:text="Quote Content" />
<TextView
android:id="#+id/textViewProfileName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:textAppearance="?android:textAppearanceSmall"
android:textIsSelectable="true"
tools:text="Profile Name" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="right"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<TextView
android:id="#+id/textViewQuoteCopy"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:textAppearance="?android:textAppearanceSmall"
android:clickable="true"
tools:text="Copy" />
<TextView
android:id="#+id/textViewQuoteShare"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:textAppearance="?android:textAppearanceSmall"
tools:text="Share" />
<TextView
android:id="#+id/textViewQuoteLike"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
android:textAppearance="?android:textAppearanceSmall"
tools:text="Like" />
</LinearLayout>
</LinearLayout>
<TextView
android:text="TextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="#+id/textViewQuoteId"
android:visibility="invisible" />
</RelativeLayout>
fragment_home.xml
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:id="#+id/parentLayout"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.v4.widget.ContentLoadingProgressBar
android:id="#+id/progress"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="visible" />
<ListView app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:id="#+id/listView"
android:layout_width="fill_parent"
android:layout_height="match_parent" />
</RelativeLayout>

You just need a context, so:
Toast.makeText(rootView.getContext(), "Like is done.",
Toast.LENGTH_LONG).show();
But you need to make rootView final first:
public static ViewHolder create(final RelativeLayout rootView){...
^^

RecyclerView Issue

MainActivity.java
its my main java class
package com.example.shikhu.newpractice;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
Button button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(MainActivity.this,DisplayList.class));
}
});
}
}
DisplayList.java
package com.example.shikhu.newpractice;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class DisplayList extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dsiplay_list);
BackgroundTask backgroundTask = new BackgroundTask(DisplayList.this);
backgroundTask.execute();
}
}
BackgroundTask.java
package com.example.shikhu.newpractice;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
public class BackgroundTask extends AsyncTask<Void,Fruit,Void> {
String json_string = "http://192.168.1.18:8081/fruitinfo/get_fruit_details.php";
Context ctx;
Activity activity;
RecyclerView recyclerView;
RecyclerView.Adapter adapter;
RecyclerView.LayoutManager layoutManager;
ArrayList<Fruit> arrayList = new ArrayList<>();
public BackgroundTask(Context ctx)
{
this.ctx=ctx;
activity = (Activity)ctx;
}
#Override
protected void onPreExecute() {
recyclerView = (RecyclerView)activity.findViewById(R.id.recyclerview);
layoutManager = new LinearLayoutManager(ctx);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
adapter = new RecyclerAdapter(arrayList);
recyclerView.setAdapter(adapter);
}
#Override
protected Void doInBackground(Void... params) {
try{
URL url = new URL(json_string);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder stringBuilder = new StringBuilder();
String line;
while((line=bufferedReader.readLine())!=null)
{
stringBuilder.append(line + "\n");
}
httpURLConnection.disconnect();
String json_string = stringBuilder.toString().trim();
JSONObject jsonObject = new JSONObject(json_string);
JSONArray jsonArray = jsonObject.getJSONArray("server_response");
int count = 0;
while (count<jsonArray.length())
{
JSONObject JO = jsonArray.getJSONObject(count);
count++;
Fruit fruit = new Fruit(JO.getString("name"),JO.getInt("calories"),JO.getDouble("fat"));
publishProgress(fruit);
}
Log.d("JSON STRING",json_string);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onProgressUpdate(Fruit... values) {
arrayList.add(values[0]);
adapter.notifyDataSetChanged();
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
}
}
RecyclerAdapter.java
package com.example.shikhu.newpractice;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder> {
private static final int TYPE_HEAD = 0;
private static final int TYPE_LIST = 1;
ArrayList<Fruit> arrayList = new ArrayList<>();
public RecyclerAdapter(ArrayList<Fruit> arrayList)
{
this.arrayList =arrayList;
}
#Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_HEAD)
{
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.header_layout,parent,false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(view,viewType);
return recyclerViewHolder;
}
else if (viewType == TYPE_LIST)
{
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_layout,parent,false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(view,viewType);
return recyclerViewHolder;
}
return null;
}
#Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
if (holder.viewType == TYPE_LIST) {
Fruit fruit = arrayList.get(position);
holder.Name.setText(fruit.getName());
holder.Calories.setText(Integer.toString(fruit.getCalories()));
holder.Fat.setText(Double.toString(fruit.getFat()));
}
}
#Override
public int getItemCount() {
return arrayList.size();
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder
{
TextView Name,Calories,Fat;
int viewType;
public RecyclerViewHolder(View v,int viewType)
{
super(v);
if (viewType == TYPE_LIST) {
Name = (TextView) v.findViewById(R.id.name);
Calories = (TextView) v.findViewById(R.id.calories);
Fat = (TextView) v.findViewById(R.id.fat);
this.viewType = TYPE_LIST;
}else if (viewType == TYPE_HEAD)
{
this.viewType = TYPE_HEAD;
}
}
public int getItemViewType(int position)
{
if (position==0)
return TYPE_HEAD;
return TYPE_LIST;
}
}
}
Fruit.java
package com.example.shikhu.newpractice;
public class Fruit {
private String name;
private int calories;
private Double fat;
public Fruit(String name,int calories,Double fat)
{
this.setName(name);
this.setCalories(calories);
this.setFat(fat);
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name=name;
}
public int getCalories()
{
return calories;
}
public void setCalories(int calories)
{
this.calories=calories;
}
public Double getFat()
{
return fat;
}
public void setFat(Double fat)
{
this.fat=fat;
}
}
Row_layout.xml
<?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="75dp"
android:layout_marginRight="15dp"
android:layout_marginLeft="15dp"
android:weightSum="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:textStyle="bold"
android:textSize="20dp"
android:text="Name"
android:id="#+id/name"
android:layout_weight="0.39" />
<TextView
android:layout_width="79dp"
android:layout_height="match_parent"
android:text="Calorie"
android:gravity="center_vertical"
android:textSize="20dp"
android:textStyle="bold"
android:id="#+id/calories"
android:layout_marginLeft="40dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="Fat"
android:gravity="center_vertical"
android:textSize="20dp"
android:textStyle="bold"
android:id="#+id/fat"
android:layout_weight="0.15"
android:layout_marginLeft="60dp" />
</LinearLayout>
Header_layout.xml
<?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="65dp"
android:background="?attr/colorPrimary">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:textStyle="bold"
android:textSize="20dp"
android:text="Name"
android:id="#+id/name1"
android:layout_weight="0.20"
android:textColor="#ffffff"
android:layout_marginLeft="10dp" />
<TextView
android:layout_width="79dp"
android:layout_height="match_parent"
android:text="Calorie"
android:gravity="center_vertical"
android:textSize="20dp"
android:textStyle="bold"
android:id="#+id/calories1"
android:layout_marginLeft="10dp"
android:textColor="#ffffff"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="Fat"
android:gravity="center_vertical"
android:textSize="20dp"
android:textStyle="bold"
android:id="#+id/fat1"
android:layout_weight="0.15"
android:layout_marginLeft="60dp"
android:textColor="#ffffff"/>
</LinearLayout>
activity_display_list.xml
<?xml version="1.0" encoding="utf-8"?>
<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=".DisplayList">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/recyclerview"></android.support.v7.widget.RecyclerView>
</RelativeLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.shikhu.newpractice.MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Display List"
android:id="#+id/button"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
My Output
i dont know why it is showing text of textview rather the data fetched from database
enter image description here
PhpScript
<?php
$host = "localhost";
$user = "root";
$pass = "";
$db = "fruit";
$con = mysqli_connect($host,$user,$pass,$db);
$query= "select * from fruit_details;";
$result = mysqli_query($con,$query);
$response = array();
while($row = mysqli_fetch_array($result))
{
array_push($response,array('name'=>$row[0],'calories'=>$row[1],'fat'=>$row[2 ]));
}
mysqli_close($con);
echo json_encode(array('server_response'=>$response));
?>

Your Adapter always return TYPE_HEAD i think this is wrong.
#Override
public int getItemViewType(int position) {
if (position == 0) {
return TYPE_HEAD;
} else {
return TYPE_LIST;
}
}

BackgroundTask.Java
package com.example.shikhu.newpractice;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
public class BackgroundTask extends AsyncTask<Void,Fruit,Void> {
String json_string = "http://127.0.0.1:8081/fruitinfo/get_fruit_details.php";
Context ctx;
Activity activity;
RecyclerView recyclerView;
RecyclerView.Adapter adapter;
RecyclerView.LayoutManager layoutManager;
ArrayList<Fruit> arrayList = new ArrayList<>();
public BackgroundTask(Context ctx)
{
this.ctx=ctx;
activity = (Activity)ctx;
}
#Override
protected void onPreExecute() {
recyclerView = (RecyclerView)activity.findViewById(R.id.recyclerview);
layoutManager = new LinearLayoutManager(ctx);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setHasFixedSize(true);
adapter = new RecyclerAdapter(arrayList);
recyclerView.setAdapter(adapter);
}
#Override
protected Void doInBackground(Void... params) {
try{
URL url = new URL(json_string);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
StringBuilder stringBuilder = new StringBuilder();
String line;
while((line=bufferedReader.readLine())!=null)
{
stringBuilder.append(line + "\n");
}
httpURLConnection.disconnect();
String json_string = stringBuilder.toString().trim();
JSONObject jsonObject = new JSONObject(json_string);
JSONArray jsonArray = jsonObject.getJSONArray("server_response");
int count = 0;
while (count<jsonArray.length())
{
JSONObject JO = jsonArray.getJSONObject(count);
count++;
Fruit fruit = new Fruit(JO.getString("name"),JO.getInt("calorie"),JO.getDouble("fat"));
publishProgress(fruit);
}
Log.d("JSON STRING",json_string);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onProgressUpdate(Fruit... values) {
arrayList.add(values[0]);
adapter.notifyDataSetChanged();
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
}
}
RecyclerAdapter.java
package com.example.shikhu.newpractice;
import android.support.annotation.IdRes;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder> {
private static final int TYPE_HEAD = 0;
private static final int TYPE_LIST = 1;
ArrayList<Fruit> arrayList = new ArrayList<>();
public RecyclerAdapter(ArrayList<Fruit> arrayList)
{
this.arrayList =arrayList;
}
#Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if (viewType == TYPE_HEAD)
{
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.header_layout,parent,false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(view,viewType);
return recyclerViewHolder;
}
else if (viewType == TYPE_LIST)
{
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_layout,parent,false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(view,viewType);
return recyclerViewHolder;
}
return null;
}
#Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
if (holder.viewType == TYPE_LIST) {
Fruit fruit = arrayList.get(position-1);
holder.Name.setText(fruit.getName());
holder.Calories.setText(Integer.toString(fruit.getCalories()));
holder.Fat.setText(Double.toString(fruit.getFat()));
}
}
#Override
public int getItemCount() {
return arrayList.size()+1;
}
public static class RecyclerViewHolder extends RecyclerView.ViewHolder
{
TextView Name,Calories,Fat;
int viewType;
public RecyclerViewHolder(View v,int viewType)
{
super(v);
if (viewType == TYPE_LIST) {
Name = (TextView) v.findViewById(R.id.name);
Calories = (TextView) v.findViewById(R.id.calories);
Fat = (TextView) v.findViewById(R.id.fat);
this.viewType = TYPE_LIST;
}else if (viewType == TYPE_HEAD)
{
this.viewType = TYPE_HEAD;
}
}
}
#Override
public int getItemViewType(int position) {
if (position==0)
return TYPE_HEAD;
else
return TYPE_LIST;
}
}

I think you are not managing views for header in your view holder and from bind view holder it is everytime getting only header view in return; SO just debug your code and let me know that are you getting TYPE_LIST data view or not. Also make references for header view in View holder and set text to it also.

I found your problem.
Your method getItemViewType is inside your ViewHolder class. It needs to be moved to be inside your adapter class. Right now, since your adapter has no getItemViewType method, it assumes all view types are 0 (HEADER), and so nothing is being bound.
Move this method to your adapter class and all will work :)
Edit
Another option which should work for you is to stop using viewTypes all together. Since you're using the same viewHolder anyway, when you bind the view, instead of checking the viewType, check the position:
#Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_layout,parent,false);
RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(view, TYPE_LIST);
return recyclerViewHolder;
}
#Override
public void onBindViewHolder(RecyclerViewHolder holder, int position) {
if (position > 0) {
Fruit fruit = arrayList.get(position-1);
holder.Name.setText(fruit.getName());
holder.Calories.setText(Integer.toString(fruit.getCalories()));
holder.Fat.setText(Double.toString(fruit.getFat()));
} else {
holder.Name.setText("Name");
holder.Calories.setText("Calories");
holder.Fat.setText("Fat");
}
}
So now, all your view types will be of type list. This is fine, because the layout is basically identical, only the values of the TextViews changes. Instead of using viewType, simply use the position. If the position is 0, set the header fields, otherwise, use the Fruit data.
I know this is not the solution you wanted - I can't seem to find why the viewType implementation doesn't work, however, this solution should give you the result you wanted.
Hope this helps!

data is not visible in listview

I tried all possible cases but data is not showing in the list from database.my starting activity have list view which is to be empty in starting and when user fill the data and save it from another activity,ans press back button the data should be shown in the first activity which have list view.,but every time data is not show
MainActivty.java
package com.example.smscampaign;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
public class Campaign_Details extends Activity {
private Demo selectedAdapter;
private ArrayList<String> list;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_demostration);
TextView text1=(TextView) findViewById(R.id.text1);
TextView text2=(TextView) findViewById(R.id.text1);
DataBaseHandler info= new DataBaseHandler(this);
info.open();
String data=info.getData();
info.close();
String[] values= new String[]{ data };
//txt.setText(data);
// Button next=(Button) findViewById(R.id.next);
// Map<String, String[]> storage = new HashMap<String, String[]>();
// String[] tableItems = storage.get("ContactTable");
// next.setOnClickListener(this);
// final ListView listview = (ListView) findViewById(R.id.listview);
ListView listview1 = (ListView) findViewById(R.id.listview1);
// TextView emptyText = (TextView)findViewById(android.R.id.empty);
//listview.setEmptyView(findViewById(R.id.empty));
// TextView emptyText = (TextView)findViewById(android.R.id.empty);
// listview .setEmptyView(emptyText);
final ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < values.length; ++i) {
list.add(values[i]);
}
selectedAdapter = new Demo(this,values);
ListView listview = (ListView) findViewById(R.id.listview);
listview.setAdapter(selectedAdapter);
listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, final View view,
int position, long id) {
Intent n = new Intent(getApplicationContext(), SmsSend.class);
startActivity(n);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
getMenuInflater().inflate(R.menu.main2, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.nextPage:
Intent i = new Intent(this,SmsSend.class);
startActivity(i);
break;
}
return super.onOptionsItemSelected(item);
}
}
demo.java
package com.example.smscampaign;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class Demo extends ArrayAdapter{
private Campaign_Details list1;
// used to keep selected position in ListView
private int selectedPos = -1; // init value for not-selected
private Context context;
private String[] values;
public Demo(Context context, String[] values) {
super(context, R.layout.list);
this.context = context;
this.values = values;
}
public void setSelectedPosition(int pos){
selectedPos = pos;
// inform the view of this change
notifyDataSetChanged();
}
public int getSelectedPosition(){
return selectedPos;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
LayoutInflater vi = (LayoutInflater)this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.list, null);
// get text view
TextView label = (TextView)v.findViewById(R.id.data);
if (convertView == null) {
v = vi.inflate(R.layout.list, parent, false);
}
else
v = convertView;
TextView text1 = (TextView) v.findViewById(R.id.data);
text1.setText(values[position]);
return v;
}
}
activity_list_demonstration.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:stretchColumns="3" >
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textcolour"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:background="#drawable/green_circle" />
<TextView
android:id="#+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingLeft="10dp"
android:text="Active Campaign"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#4AE56B" />
<TextView
android:id="#+id/textnum1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginRight="130dp"
android:background="#drawable/green_badge"
android:gravity="center"
android:text=" 0 "
android:textColor="#color/white" />
</TableRow>
</TableLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="240dp"
android:orientation="vertical" >
<ListView
android:id="#+id/listview"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:stretchColumns="3" >
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textcolour"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:background="#drawable/grey_circle" />
<TextView
android:id="#+id/text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:text="Closed Campaign"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/textnum2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginRight="130dp"
android:background="#drawable/grey_badge"
android:gravity="center"
android:text=" 0 "
android:textColor="#color/white" />
</TableRow>
</TableLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="140dp"
android:orientation="vertical" >
<ListView
android:id="#+id/listview1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
list.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/data"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="text" >
</TextView>
</LinearLayout>
DatabaseHandler.java// databaseclass
package com.example.smscampaign;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
public class DataBaseHandler{
public static final String KEY_ROWID="_id";
public static final String KEY_NAME="person_name";
public static final String KEY_SCALE="scale_person";
private static final String DATABASE_NAME="Scaledb";
private static final String DATABASE_TABLE="peopleTable";
private static final int DATABASE_VERSION=1;
private DbHelper ourHepler;
private final Context ourContext;
private SQLiteDatabase ourDatabase;
public class DbHelper extends SQLiteOpenHelper{
public DbHelper(Context context) {
super(context,DATABASE_NAME,null,DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
#Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL( "CREATE TABLE " + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_NAME + " TEXT NOT NULL, " +
KEY_SCALE + " TEXT NOT NULL );"
);
}
#Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS" + DATABASE_TABLE);
onCreate(db);
}
}
public DataBaseHandler(Context c){
ourContext=c;
}
public DataBaseHandler open() throws SQLException{
ourHepler = new DbHelper(ourContext);
ourDatabase= ourHepler.getWritableDatabase();
return this;
}
public void close()
{
ourHepler.close();
}
public long entryCreate(String name, String scale) {
// TODO Auto-generated method stub
ContentValues cv=new ContentValues();
cv.put(KEY_NAME, name);
cv.put(KEY_SCALE, scale);
return ourDatabase.insert(DATABASE_TABLE, null, cv);
}
public String getData() {
// TODO Auto-generated method stub
String[] col= new String[]{KEY_ROWID,KEY_NAME,KEY_SCALE};
Cursor c= ourDatabase.query(DATABASE_TABLE, col, null, null, null, null, null);
String run="";
int iRow=c.getColumnIndex(KEY_ROWID);
int iName=c.getColumnIndex(KEY_NAME);
int iScale=c.getColumnIndex(KEY_SCALE);
for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){
run=run+c.getString(iRow)+ " " + c.getString(iName) + " " + c.getString(iScale) + "\n";
}
return run;
}
public String getScale(long l) {
// TODO Auto-generated method stub
String[] col= new String[]{KEY_ROWID,KEY_NAME,KEY_SCALE};
Cursor c= ourDatabase.query(DATABASE_TABLE, col,KEY_ROWID + "-" + l, null, null, null, null);
if(c != null){
c.moveToFirst();
String scale=c.getString(2);
return scale;
}
return null;
}
public String getName(long l) {
// TODO Auto-generated method stub
String[] col= new String[]{KEY_ROWID,KEY_NAME,KEY_SCALE};
Cursor c= ourDatabase.query(DATABASE_TABLE, col,KEY_ROWID + "-" + l, null, null, null, null);
if(c != null){
c.moveToFirst();
String name=c.getString(1);
return name;
}
return null;
}
public void updateEntry(long lt, String mName, String mScale) {
// TODO Auto-generated method stub
ContentValues cvUpdate=new ContentValues();
cvUpdate.put(KEY_NAME,mName);
cvUpdate.put(KEY_SCALE,mScale);
ourDatabase.update(DATABASE_TABLE, cvUpdate, KEY_ROWID + "-" + lt, null);
}
public void deleteEntry(long ltt) throws SQLException{
// TODO Auto-generated method stub
ourDatabase.delete(DATABASE_TABLE, KEY_ROWID + "=" + ltt,null);
}
}

You need to change at some places. You have declared your arraylist globally as a
private ArrayList<String> list;
after that again you have declared on onCreate() method
final ArrayList<String> list = new ArrayList<String>();
So replace that by
list = new ArrayList<String>();
Now in your all data is added in your list but in your adapter you have passed values string array. So you also need to change from
selectedAdapter = new Demo(this,values);
to
selectedAdapter = new Demo(this,list);

Change the getview method contents.
public static class ViewHolder{
public TextView text;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
ViewHolder holder;
if(convertView==null){
vi = inflater.inflate(R.layout.list, null);
holder = new ViewHolder();
holder.text = (TextView) vi.findViewById(R.id.data);
vi.setTag( holder );
}
else
holder=(ViewHolder)vi.getTag();
Also if you are not customizing layout[using only a textview] use the arrayadapter straightaway by choosing default layout.

in your ArrayAdapter you wrote
if (convertView == null) {
v = vi.inflate(R.layout.list, parent, false);
} else
v = convertView;
Remove the else statement. or rather remove the complete if-else statement. Also
TextView text1 = (TextView) v.findViewById(R.id.data); is extra you have already defined this specific TextView in label
EDIT
public Demo(Context context, String[] values) {
super(context, R.layout.list);
this.context = context;
this.values = values;
}
to
public Demo(Context context, String[] values) {
super(context, R.layout.list,values);
this.context = context;
this.values = values;
}

press back button the data should be shown in the first activity
You write your database loading code in onCreate() method which executes once in its life-cycle i.e when your application starts or when activity destroyed like in orientation changes.
So when you press back button the onCreate() has not called and the same will be continue with list.
Some suggessions:
its good if you write all database stuff in your onResume()
otherwise call finish() in your onPause() method of your main activity and again start it through intent in back pressed method of your second_activity..finish() kills the activity when you go to next one ..and again recreate when you come from the second through strtaActivity followed by its corresponding intent.
And also its better if you use StringTokenizer when you get data from database and put into String array.

How to convert JSONArray to ListView?

I have a code which does following -
Connect to a web service via HttpClient to PHP file
Returns a result from an SQL query
Returns format is a jArray (a JSONArray)
for(int i=0; i < jArray.length() ; i++) {
json_data = jArray.getJSONObject(i);
int id=json_data.getInt("id");
String name=json_data.getString("name");
Log.d(name,"Output");
}
When I look at the LogCat, I see all the "names" of the query, Each record is printed. I just need to plug these results into a ListView. How can I accomplish this ?
PS - I do not have a separate class for an ArrayAdapter. Could this be the reason ?

If you just want to display a list of textViews you don't need to override anything, you can just add all of the items into an arrayList and use an arrayAdapter.
Put a list view in your xml that is named android:list and then create your arrayAdapter with the textView you want to use.
After that all you have to do is call setListAdapter(mArrayAdapter) and it should populate your list.
ArrayList<String> items = new ArrayList<String>();
for(int i=0; i < jArray.length() ; i++) {
json_data = jArray.getJSONObject(i);
int id=json_data.getInt("id");
String name=json_data.getString("name");
items.add(name);
Log.d(name,"Output");
}
ArrayAdapter<String> mArrayAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_expandable_list_item_1, items));
setListAdapter(mArrayAdapter)
hope this helps!

I do not like to remap data while i already have them in a JSON array
so this is my code ... it is simple enough for me ....hope it helps
package ...;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class DataListFragment extends ListFragment{
JSONArray data;
public DataListFragment(){
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Log.i("mycode", "DataListFragment onActivityCreated");
data=((MainActivity)this.getActivity()).data;
Log.i("mycode", "data length "+data.toString());
setEmptyText("No Data Here");
final JSONArrayAdapter adapter = new JSONArrayAdapter(this.getActivity(),data);
setListAdapter(adapter);
// Start out with a progress indicator.
//setListShown(false);
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
// Insert desired behavior here.
Log.i("mycode", "Item clicked: " + id);
}
private class JSONArrayAdapter extends BaseAdapter {
JSONArray data;
Context context;
public JSONArrayAdapter(Context context,JSONArray data) {
super();
this.context=context;
this.data=data;
}
#Override
public int getCount() {
return data.length();
}
#Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
try {
return data.getJSONObject(arg0);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
public long getItemId(int arg0) {
return arg0;
}
#Override
public boolean hasStableIds(){
return true;
}
#Override
public boolean isEmpty(){
return data==null || data.length()==0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.single_item, parent, false);
TextView textView1 = (TextView) rowView.findViewById(R.id.firstLine);
TextView textView2 = (TextView) rowView.findViewById(R.id.secondLine);
//ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
try {
JSONObject jo = (JSONObject) data.get(position);
textView1.setText(jo.getString("category_title"));
textView2.setText(jo.getString("description"));
} catch (JSONException e) {
e.printStackTrace();
}
return rowView;
}
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip" >
<ImageView
android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentTop="true"
android:layout_marginRight="6dip"
android:contentDescription="icon"
android:src="#drawable/ic_launcher" />
<TextView
android:id="#+id/secondLine"
android:layout_width="fill_parent"
android:layout_height="26dip"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_toRightOf="#id/icon"
android:ellipsize="marquee"
android:singleLine="true"
android:textSize="12sp" />
<TextView
android:id="#+id/firstLine"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#id/secondLine"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_alignWithParentIfMissing="true"
android:layout_toRightOf="#id/icon"
android:gravity="center_vertical"
android:textSize="16sp" />
</RelativeLayout>

Inside your for loop where you are printing the names, you should be loading an array list containing the values you would like to insert to the list later.
Notice that the example uses the following:
ArrayList< HashMap < String, String > > mylist = new ArrayList < HashMap < String, String > > ();
And you have an integer and a string to add to the structure so you could simply turn that ID into a String and problem solved.
Afterwards you can use a list adapter without the need of creating a separate class:
ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.main, new String[] { "name", "id" }, new int[] { R.id.item_title, R.id.item_subtitle });
Where "name" and "id" will be the keys in your map for the name and id values returned by json and item_title, item_subtitle the views to "adapt" the text on.

Put the data into an Array and use ArrayAdapter to bind data to a list items.
See the article on:
http://www.josecgomez.com/2010/05/03/android-putting-custom-objects-in-listview/

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Android ListView not being populated by custom ParseQueryAdapter - java

Replace queryL.whereNotEqualTo("name", null); with queryL.whereExists("name");

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