We Keep Coding

RecyclerView: No adapter attached; skipping layout when Im running

I'm new coder of android and trying to get list of images in my server and database(mysql) but I got error and I don't know what is causing it...
the error is 'E/RecyclerView: No adapter attached; skipping layout' and it happen when I'm running, anyone can help me??
public class LoadListFromServer extends AsyncTask<String, Void, String> {
private RecyclerView recyclerView;
private Context context;
private ArrayList<ImageGalleryItem> imageGalleryItems;
private boolean pattern;
public LoadListFromServer(RecyclerView recyclerView, Context context, boolean pattern) {
this.recyclerView = recyclerView;
this.context = context;
this.pattern = pattern;
}
public ArrayList<ImageGalleryItem> getImageGalleryItems() {
return imageGalleryItems;
}
#Override
protected String doInBackground(String... strings) {
URL url;
HttpURLConnection urlConnection = null;
try {
url = new URL(strings[0]);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestProperty("Content-type", "application/json");
int responseCode = urlConnection.getResponseCode();
if(responseCode == HttpURLConnection.HTTP_OK){
return readStream(urlConnection.getInputStream());
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(context,2);
recyclerView.setLayoutManager(layoutManager);
imageGalleryItems = prepareData(response);
MyAdapter adapter = new MyAdapter(context, imageGalleryItems);
recyclerView.setAdapter(adapter);
}
private String readStream(InputStream in) {
BufferedReader reader = null;
StringBuffer response = new StringBuffer();
try {
reader = new BufferedReader(new InputStreamReader(in, "UTF-8"), 8);
String line = "";
while ((line = reader.readLine()) != null) {
response.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return response.toString();
}
private ArrayList<ImageGalleryItem> prepareData(String response) {
ArrayList<ImageGalleryItem> result = null;
try {
JSONArray jsonArray = new JSONArray(response);
result = new ArrayList<>(jsonArray.length());
for (int i=0; i < jsonArray.length(); i++) {
try {
JSONObject oneObject = jsonArray.getJSONObject(i);
String id = oneObject.getString("id");
String name = oneObject.getString("name");
result.add(new ImageGalleryItem(name, Long.parseLong(id), pattern));
} catch (JSONException e) {
e.printStackTrace();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
if(result == null) {
return new ArrayList<>();
} else {
return result;
}
}
}
I wrote my adapter as MyAdapter.java:
class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private ArrayList<ImageGalleryItem> galleryList;
public MyAdapter(Context context, ArrayList<ImageGalleryItem> galleryList) {
this.galleryList = galleryList;
}
#Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.cell_layout, viewGroup, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(MyAdapter.ViewHolder viewHolder, int i) {
final ImageGalleryItem imageGalleryItem = galleryList.get(i);
viewHolder.title.setText(imageGalleryItem.getName());
viewHolder.img.setScaleType(ImageView.ScaleType.FIT_XY);
String imageFolderName;
final boolean isPattern = imageGalleryItem.isPattern();
if(isPattern) {
imageFolderName = viewHolder.img.getContext().getString(R.string.patterns_directory);
} else {
imageFolderName = viewHolder.img.getContext().getString(R.string.collections_directory);
}
LoadSVGFromServer loadSVGFromServer = new LoadSVGFromServer(viewHolder.img);
loadSVGFromServer.execute(viewHolder.img.getContext().getString(R.string.server_base_address)
+ imageFolderName
+ imageGalleryItem.getID() + ".svg");
viewHolder.img.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Activity activity = (Activity) v.getContext();
if(isPattern) {
Intent intent = new Intent(activity, ColoringActivity.class);
Bundle b = new Bundle();
b.putSerializable(activity.getString(R.string.CURRENT_COLLECTION_BUNDLE_KEY), imageGalleryItem);
intent.putExtras(b);
activity.startActivity(intent);
} else {
Intent intent = new Intent(activity, ShowPatternsActivity.class);
Bundle b = new Bundle();
b.putSerializable(activity.getString(R.string.CURRENT_COLLECTION_BUNDLE_KEY), imageGalleryItem);
intent.putExtras(b);
activity.startActivity(intent);
}
}
});
}
#Override
public int getItemCount() {
return galleryList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
private TextView title;
private ImageView img;
public ViewHolder(View view) {
super(view);
title = (TextView)view.findViewById(R.id.title);
img = (ImageView) view.findViewById(R.id.img);
}
}
}

You can setup your recyclerView and set items when data received.
activity code for setup recycler view:
public class MainActivity extends AppCompatActivity {
private MyAdapter mAdapter;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setupRecyclerView();
}
private void setupRecyclerView(){
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new GridLayoutManager(context,2);
recyclerView.setLayoutManager(layoutManager);
mAdapter = new MyAdapter(context);
recyclerView.setAdapter(mAdapter);
}
}
Pass adapter to async task:
public class LoadListFromServer extends AsyncTask<String, Void, String> {
private MyAdapter mAdapter;
private Context context;
private ArrayList<ImageGalleryItem> imageGalleryItems;
private boolean pattern;
public LoadListFromServer(MyAdapter adapter, Context context, boolean pattern) {
this.mAdapter = adapter;
this.context = context;
this.pattern = pattern;
}
public ArrayList<ImageGalleryItem> getImageGalleryItems() {
return imageGalleryItems;
}
#Override
protected String doInBackground(String... strings) {
URL url;
HttpURLConnection urlConnection = null;
try {
url = new URL(strings[0]);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestProperty("Content-type", "application/json");
int responseCode = urlConnection.getResponseCode();
if(responseCode == HttpURLConnection.HTTP_OK){
return readStream(urlConnection.getInputStream());
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
imageGalleryItems = prepareData(response);
mAdapter.setItems(imageGalleryItems);
}
private String readStream(InputStream in) {
BufferedReader reader = null;
StringBuffer response = new StringBuffer();
try {
reader = new BufferedReader(new InputStreamReader(in, "UTF-8"), 8);
String line = "";
while ((line = reader.readLine()) != null) {
response.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return response.toString();
}
private ArrayList<ImageGalleryItem> prepareData(String response) {
ArrayList<ImageGalleryItem> result = null;
try {
JSONArray jsonArray = new JSONArray(response);
result = new ArrayList<>(jsonArray.length());
for (int i=0; i < jsonArray.length(); i++) {
try {
JSONObject oneObject = jsonArray.getJSONObject(i);
String id = oneObject.getString("id");
String name = oneObject.getString("name");
result.add(new ImageGalleryItem(name, Long.parseLong(id), pattern));
} catch (JSONException e) {
e.printStackTrace();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
if(result == null) {
return new ArrayList<>();
} else {
return result;
}
}
}
Adapter with setItems method:
class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private ArrayList<ImageGalleryItem> galleryList;
public MyAdapter(Context context) {
}
#Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.cell_layout, viewGroup, false);
return new ViewHolder(view);
}
public void setItems(ArrayList<ImageGalleryItem> galleryList){
this.galleryList = galleryList;
notifyDataSetChanged();
}
#Override
public void onBindViewHolder(MyAdapter.ViewHolder viewHolder, int i) {
final ImageGalleryItem imageGalleryItem = galleryList.get(i);
viewHolder.title.setText(imageGalleryItem.getName());
viewHolder.img.setScaleType(ImageView.ScaleType.FIT_XY);
String imageFolderName;
final boolean isPattern = imageGalleryItem.isPattern();
if(isPattern) {
imageFolderName = viewHolder.img.getContext().getString(R.string.patterns_directory);
} else {
imageFolderName = viewHolder.img.getContext().getString(R.string.collections_directory);
}
LoadSVGFromServer loadSVGFromServer = new LoadSVGFromServer(viewHolder.img);
loadSVGFromServer.execute(viewHolder.img.getContext().getString(R.string.server_base_address)
+ imageFolderName
+ imageGalleryItem.getID() + ".svg");
viewHolder.img.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Activity activity = (Activity) v.getContext();
if(isPattern) {
Intent intent = new Intent(activity, ColoringActivity.class);
Bundle b = new Bundle();
b.putSerializable(activity.getString(R.string.CURRENT_COLLECTION_BUNDLE_KEY), imageGalleryItem);
intent.putExtras(b);
activity.startActivity(intent);
} else {
Intent intent = new Intent(activity, ShowPatternsActivity.class);
Bundle b = new Bundle();
b.putSerializable(activity.getString(R.string.CURRENT_COLLECTION_BUNDLE_KEY), imageGalleryItem);
intent.putExtras(b);
activity.startActivity(intent);
}
}
});
}
#Override
public int getItemCount() {
return galleryList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
private TextView title;
private ImageView img;
public ViewHolder(View view) {
super(view);
title = (TextView)view.findViewById(R.id.title);
img = (ImageView) view.findViewById(R.id.img);
}
}
}

Unable to fetch images in Grid view

Main Activity:
public class MainActivity extends AppCompatActivity {
// ImageView iv;
public static StringBuffer finalparsedData;
public static GridView myGrid;
private static final String TAG = MainActivity.class.getSimpleName();
ArrayList<String> values = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myGrid=(GridView)findViewById(R.id.grid_view);
Button btnHit = (Button) findViewById(R.id.btnHit);
btnHit.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
new JSONTask().execute("https://api.flickr.com/services/rest/?method=flickr.photos.getRecent&" +
"api_key=46e71c8d2b35ba8c9c333a462ec8aea7&per_page=3&format=json&nojsoncallback=10");
}
});
values = new ArrayList<>();
}
/*static boolean isAirplaneModeOn(Context context) {
ContentResolver contentResolver = context.getContentResolver();
return Settings.System.getInt(contentResolver, AIRPLANE_MODE_ON, 0) != 0;
}*/
public class JSONTask extends AsyncTask<String, Void, String> {
String photoid;
int farm;
String server;
String secret;
#Override
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
StringBuffer buffer = null;
JSONArray parentarray = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
//JSONObject initialObject = new JSONObject("photos");
JSONObject initialObject = parentObject.getJSONObject("photos");
parentarray = initialObject.getJSONArray("photo");
finalparsedData = new StringBuffer();
for (int i = 0; i < parentarray.length(); i++) {
JSONObject finalObject = parentarray.getJSONObject(i);
photoid = finalObject.optString("id");
farm = finalObject.optInt("farm");
server = finalObject.optString("server");
secret = finalObject.optString("secret");
finalparsedData.append("https://farm" + farm + ".staticflickr.com/" + server + "/" + photoid+ "_" + secret + ".jpg" +"\n\n");
values.add(String.valueOf((finalparsedData)));
}
return "done";
} catch (MalformedURLException e) {
e.printStackTrace();
return "error";
} catch (IOException e) {
e.printStackTrace();
return "error";
} catch (JSONException e) {
e.printStackTrace();
return "error";
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
return "done";
}
} catch (IOException e) {
e.printStackTrace();
return "error";
}
}
}
#Override
protected void onPostExecute(String result) {
switch (result){
case "done":
MyImageAdapter adapter = new MyImageAdapter(MainActivity.this, values);
myGrid.setAdapter((ListAdapter) adapter);
break;
}
}
}
}
MyAdapterClass:
public class MyImageAdapter extends BaseAdapter {
ArrayList<String> values;
Context mContext;
public MyImageAdapter(Context mContext, ArrayList<String> values) {
this.values = values;
this.mContext = mContext;
}
#Override
public int getCount() {
return values.size();
}
#Override
public Object getItem(int position) {
return position;
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
ViewHolder holder;
;
if (row == null){
LayoutInflater inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.grid,parent,false);
holder = new ViewHolder();
holder.imageView = (ImageView) row.findViewById(R.id.image_View);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
String image = values.get(position);
Picasso.with(mContext).load(image).into(holder.imageView);
return row;
}
public class ViewHolder {
ImageView imageView;
}
}
I got a problem during images loading in gridview, out of 10 images only 1 image is shown and rest of them showing "this images is no longer available"

Hahaha, silly mistake. Just replace your for loop inside JSONTask with this,
.
.
.
for (int i = 0; i < parentarray.length(); i++) {
JSONObject finalObject = parentarray.getJSONObject(i);
photoid = finalObject.optString("id");
farm = finalObject.optInt("farm");
server = finalObject.optString("server");
secret = finalObject.optString("secret");
String fullPath = "https://farm" + farm + ".staticflickr.com/" + server + "/" + photoid+ "_" + secret + ".jpg";
values.add(fullPath);
}
.
.
.
No need to use StringBuffer. You should use normal String variable. :)

Some Issue on sending data to next activity using onClickListner

i am trying to send Data (ID value) from one activity to other
but it wouldn't send correct data , i want it to send only ID Value of Clicked Item to next activity , here is my code
public class Order extends AppCompatActivity {
private ListView lvUsers;
private ProgressDialog dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sub);
dialog = new ProgressDialog(this);
dialog.setIndeterminate(true);
dialog.setCancelable(false);
dialog.setMessage("Loading, please wait.....");
lvUsers = (ListView) findViewById(R.id.lvUsers);
new JSONTask().execute("http://146.185.178.83/resttest/order");
}
public class JSONTask extends AsyncTask<String, String, List<OrderModel> > {
#Override
protected void onPreExecute(){
super.onPreExecute();
dialog.show();
}
#Override
protected List<OrderModel> doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line ="";
while ((line=reader.readLine()) !=null){
buffer.append(line);
}
String finalJson = buffer.toString();
JSONArray parentArray = new JSONArray(finalJson);
List<OrderModel> orderModelList = new ArrayList<>();
Gson gson = new Gson();
for (int i = 0; i < parentArray.length(); i++) {
JSONObject finalObject = parentArray.getJSONObject(i);
OrderModel orderModel = gson.fromJson(finalObject.toString(), OrderModel.class);
orderModelList.add(orderModel);
}
return orderModelList;
}catch (MalformedURLException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if(connection !=null) {
connection.disconnect();
}
try {
if (reader !=null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPostExecute(List<OrderModel> result) {
super.onPostExecute(result);
dialog.dismiss();
OrderAdapter adapter = new OrderAdapter(getApplicationContext(), R.layout.row_order, result);
lvUsers.setAdapter(adapter);
}
}
public class OrderAdapter extends ArrayAdapter {
public List<OrderModel> orderModelList;
private int resource;
private LayoutInflater inflater;
public OrderAdapter(Context context, int resource, List<OrderModel> objects) {
super(context, resource, objects);
orderModelList = objects;
this.resource = resource;
inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if(convertView == null){
holder = new ViewHolder();
convertView=inflater.inflate(resource, null);
holder.bOrderNo = (Button) convertView.findViewById(R.id.bOrderNo);
convertView.setTag(holder);
}else {
holder = (ViewHolder) convertView.getTag();
}
final int orderId = orderModelList.get(position).getId();
holder.bOrderNo.setText("Order No: " + orderModelList.get(position).getOrderId());
holder.bOrderNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(Order.this, OrderSelected.class);
intent.putExtra("parameter_name", orderId);
startActivity(intent);
}
});
return convertView;
}
class ViewHolder{
private Button bOrderNo;
}
}
}
The holder gets executed in loop i guess is why it wouldn't send right Id.
How do i get it to send only Id of the clicked orderId
you can check this link to see how json Response looks like http://146.185.178.83/resttest/order

You have a silly mistake in your code . I have edited single line in your code . I think you are getting same "orderId" every time instead of actual "orderId". Check this one . I hope your problem will resolve .
final int index = position;
holder.bOrderNo.setText("Order No: " + orderModelList.get(position).getOrderId());
holder.bOrderNo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(Order.this, OrderSelected.class);
intent.putExtra("parameter_name", orderModelList.get(index).getId());
startActivity(intent);
}
});

Please try
In place of
intent.putExtra("parameter_name", orderId);
Please put
intent.putExtra("parameter_name", orderModelList.get(position).getId());

How to display image from Json url in list view

I'm new in android. I have a problem about loading the image from Json Url to ListView. ListView works only without image.
This is my json url:
{
"infoBooks": [{
"user_name": "carlo",
"title": "Title: Il potere del cane\nAuthor\/s: Don Winslow",
"author": "",
"urlImage": "https:\/\/books.google.it\/books\/content?id=qiLanQEACAAJ&printsec=frontcover&img=1&zoom=1&source=gbs_api"
}, {
"user_name": "ff",
"title": "Title: Incontro con la storia. Con espansione online. Per la Scuola media\nAuthor\/s: Luisa Benucci",
"author": "",
"urlImage": "https:\/\/books.google.it\/books\/content?id=qTzFSgAACAAJ&printsec=frontcover&img=1&zoom=1&source=gbs_api"
}]
}
SearchBooks.java:
public class SearchBooks extends AppCompatActivity {
ListView mListView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_search_books);
String strUrl = "http://192.168.1.118:8888/webappdb/listViewBooks.php";
DownloadTask downloadTask = new DownloadTask();
downloadTask.execute(strUrl);
mListView = (ListView) findViewById(R.id.listView);
}
private String downloadUrl (String strUrl) throws IOException{
String data = "";
InputStream iStream = null;
try {
URL url = new URL(strUrl);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
iStream = urlConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(iStream));
StringBuffer sb = new StringBuffer();
String line = "";
while ((line = br.readLine()) != null) {
sb.append(line);
}
data = sb.toString();
br.close();
}catch (Exception e){
Log.d("Exception while downloading url", e.toString());
}finally {
iStream.close();
}
return data;
}
private class DownloadTask extends AsyncTask<String, Integer, String>{
String data = null;
#Override
protected String doInBackground(String... url) {
try {
data = downloadUrl(url[0]);
} catch (IOException e) {
Log.d("Background Task", e.toString());
}
return data;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
ListViewLoaderTask listViewLoaderTask = new ListViewLoaderTask();
listViewLoaderTask.execute(result);
}
}
private class ListViewLoaderTask extends AsyncTask<String, Void, SimpleAdapter>{
JSONObject jObject;
#Override
protected SimpleAdapter doInBackground(String... strJson) {
try {
jObject = new JSONObject(strJson[0]);
customAdapter customAdapter = new customAdapter();
customAdapter.parse(jObject);
} catch (JSONException e) {
Log.d("JSON Exception1", e.toString());
}
customAdapter customAdapter = new customAdapter();
List<HashMap<String, Object>> books = null;
try {
books = customAdapter.parse(jObject);
} catch (Exception e){
Log.d("Exception", e.toString());
}
String infoFrom[] = {"user_name", "details", "launcherImage"};
int infoTo[] = {R.id.user_name_search, R.id.bookDescriptionSearch, R.id.coverBookSearch};
SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), books, R.layout.row_list_books, infoFrom, infoTo);
return adapter;
}
#Override
protected void onPostExecute(SimpleAdapter adapter) {
mListView.setAdapter(adapter);
for (int i = 0; i < adapter.getCount(); i++){
HashMap<String, Object> hm = (HashMap<String, Object>) adapter.getItem(i);
String imgUrl = (String) hm.get("urlImage");
ImageLoaderTask imageLoaderTask = new ImageLoaderTask();
hm.put("urlImage", imgUrl);
hm.put("position", i);
imageLoaderTask.execute(hm);
}
}
}
private class ImageLoaderTask extends AsyncTask<HashMap<String, Object>, Void, HashMap<String, Object>>{
#Override
protected HashMap<String, Object> doInBackground(HashMap<String, Object>... hm) {
InputStream iStream = null;
String imgUrl = (String) hm[0].get("urlImage");
int position = (Integer) hm[0].get("position");
URL url;
try {
url = new URL(imgUrl);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.connect();
iStream = urlConnection.getInputStream();
File cacheDirectory = getBaseContext().getCacheDir();
File tmpFile = new File (cacheDirectory.getPath() + "/wpta_" + position + ".png");
FileOutputStream fOutputStream = new FileOutputStream(tmpFile);
Bitmap b = BitmapFactory.decodeStream(iStream);
b.compress(Bitmap.CompressFormat.PNG, 100, fOutputStream);
fOutputStream.flush();
fOutputStream.close();
HashMap<String, Object> hmBitmap = new HashMap<String, Object>();
hmBitmap.put("launcherImage", tmpFile.getPath());
hmBitmap.put("position", position);
return hmBitmap;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(HashMap<String, Object> result) {
String path = (String) result.get("launcherImage");
int position = (Integer) result.get("position");
SimpleAdapter simpleAdapter = (SimpleAdapter) mListView.getAdapter();
HashMap<String, Object> hm = (HashMap<String, Object>) simpleAdapter.getItem(position);
hm.put("launcherImage", path);
simpleAdapter.notifyDataSetChanged();
}
}
}
customAdapter.java :
public class customAdapter{
public List<HashMap<String, Object>> parse(JSONObject JObject) {
JSONArray infoBooks = null;
try {
infoBooks = JObject.getJSONArray("infoBooks");
} catch (JSONException e) {
e.printStackTrace();
}
return getBooks(infoBooks);
}
private List<HashMap<String, Object>> getBooks(JSONArray infoBooks){
int booksCount = infoBooks.length();
List<HashMap<String, Object>> bookList = new ArrayList<HashMap<String, Object>>();
HashMap<String, Object> book;
for(int i = 0; i < booksCount; i++) {
try {
book = getBook((JSONObject) infoBooks.get(i));
bookList.add(book);
} catch (JSONException e) {
e.printStackTrace();
}
}
return bookList;
}
private HashMap<String, Object> getBook(JSONObject jBook){
HashMap<String, Object> book = new HashMap<String, Object>();
String user_name = "";
String title = "";
String author = "";
String urlImage = "";
try {
user_name = jBook.getString("user_name");
title = jBook.getString("title");
author = jBook.getString("author");
urlImage = jBook.getString("urlImage");
String details = "Title: " + title + "\n" +
"Author/s: " + author;
book.put("user_name", user_name);
book.put("details", details);
book.put("launcherImage", R.mipmap.ic_launcher);
book.put("urlImage", urlImage);
} catch (JSONException e) {
e.printStackTrace();
}
return book;
}
}
logcat:
03-10 12:02:42.088 969-1029/? E/lights: write_led_info failed to open -1
03-10 12:02:42.088 969-1029/? E/lights: write_led_info failed to open -1
03-10 12:02:42.188 969-1065/? E/native: do suspend false
03-10 12:02:42.288 969-1065/? E/WifiStateMachine: WifiStateMachine CMD_START_SCAN source 10007 txSuccessRate=0,00 rxSuccessRate=0,13 targetRoamBSSID=any RSSI=-73
03-10 12:02:42.388 247-569/? E/qdutils: int qdutils::getHDMINode(): Failed to open fb node 2
03-10 12:02:42.388 247-569/? E/qdutils: int qdutils::getHDMINode(): Failed to find HDMI node
03-10 12:02:42.638 969-1104/? E/lights: write_int failed to open -1
03-10 12:02:42.718 969-969/? E/LocSvc_flp: I/===> int flp_inject_location(FlpLocation*) line 222
03-10 12:02:42.728 969-1336/? E/LocSvc_ApiV02: I/<--- void globalRespCb(locClientHandleType, uint32_t, locClientRespIndUnionType, void*) line 125 QMI_LOC_INJECT_POSITION_REQ_V02
03-10 12:02:42.738 969-1367/? E/LocSvc_ApiV02: I/<--- void globalRespCb(locClientHandleType, uint32_t, locClientRespIndUnionType, void*) line 125 QMI_LOC_INJECT_POSITION_REQ_V02
03-10 12:02:43.238 274-763/? E/FastThread: did not receive expected priority boost
03-10 12:02:44.138 969-1104/? E/lights: write_int failed to open -1
03-10 12:02:44.838 969-981/? E/PersonaManagerService: inState(): stateMachine is null !!
03-10 12:02:45.078 270-270/? E/SMD: DCD OFF
03-10 12:02:45.568 23494-23494/gamingproject.sellmybooks E/AndroidRuntime: FATAL EXCEPTION: main
Process: gamingproject.sellmybooks, PID: 23494
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.util.HashMap.get(java.lang.Object)' on a null object reference
at gamingproject.sellmybooks.SearchBooks$ImageLoaderTask.onPostExecute(SearchBooks.java:216)
at gamingproject.sellmybooks.SearchBooks$ImageLoaderTask.onPostExecute(SearchBooks.java:174)
at android.os.AsyncTask.finish(AsyncTask.java:632)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5536)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1397)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1192)
03-10 12:02:45.578 969-31049/? E/android.os.Debug: ro.product_ship = true
03-10 12:02:45.578 969-31049/? E/android.os.Debug: ro.debug_level = 0x4f4c
03-10 12:02:45.668 2326-31050/? E/SQLiteLog: (284) automatic index on crash_info_summary(package_name_touched)
03-10 12:02:45.728 2326-31050/? E/SQLiteLog: (284) automatic index on crash_info_summary(package_name_touched)
03-10 12:02:48.078 270-270/? E/SMD: DCD OFF
I don't understand the error.
Thanks in advance.

You can not load an image from a url directly.
You should convert it to drawable before load it in a imageview.
Take a look at this library to load images in Android.
http://square.github.io/picasso/

Why are you making the code so complex ? Keep it simple. I have a Demo code. Maybe it can help you. Just Create a Model Class Which you Require. Other things are the same.
public class MainActivity extends AppCompatActivity {
private Button btnHit;
private HttpURLConnection connection = null;
private URL url;
private BufferedReader reader = null;
private StringBuffer buffer;
private ListView lvMovies;
private ProgressDialog dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
dialog = new ProgressDialog(this);
dialog.setIndeterminate(true);
dialog.setCancelable(false);
dialog.setMessage("Loading !! Please wait..");
DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheOnDisk(true)
.build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
.defaultDisplayImageOptions(defaultOptions)
.build();
ImageLoader.getInstance().init(config);
lvMovies = (ListView) findViewById(R.id.lvMovies);
new JSONTask().execute("http://jsonparsing.parseapp.com/jsonData/moviesData.txt");
}
public class JSONTask extends AsyncTask<String, String, List<MovieModel>> {
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog.show();
}
#Override
protected List<MovieModel> doInBackground(String... params) {
try {
url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
JSONArray parentArray = parentObject.getJSONArray("movies");
List<MovieModel> movieModelList = new ArrayList<>();
Gson gson = new Gson();
for (int i = 0; i < parentArray.length(); i++) {
JSONObject finalObject = parentArray.getJSONObject(i);
MovieModel movieModel = gson.fromJson(finalObject.toString(), MovieModel.class);
movieModelList.add(movieModel);
}
return movieModelList;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPostExecute(List<MovieModel> result) {
super.onPostExecute(result);
dialog.dismiss();
MovieAdapter adapter = new MovieAdapter(getApplicationContext(), R.layout.row, result);
lvMovies.setAdapter(adapter);
// TODO Need to set Data on List
}
}
public class MovieAdapter extends ArrayAdapter {
private List<MovieModel> movieModelList;
private int resource;
private LayoutInflater inflater;
public MovieAdapter(Context context, int resource, List<MovieModel> objects) {
super(context, resource, objects);
movieModelList = objects;
this.resource = resource;
inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(resource, null);
holder.ivMovieIcon = (ImageView) convertView.findViewById(R.id.ivIcon);
holder.tvMovie = (TextView) convertView.findViewById(R.id.tvMovie);
holder.tvTagline = (TextView) convertView.findViewById(R.id.tvTagLine);
holder.tvYear = (TextView) convertView.findViewById(R.id.tvYear);
holder.tvDuration = (TextView) convertView.findViewById(R.id.tvDuration);
holder.tvDirector = (TextView) convertView.findViewById(R.id.tvDirector);
holder.rbMovieRating = (RatingBar) convertView.findViewById(R.id.rbMovie);
holder.tvCast = (TextView) convertView.findViewById(R.id.tvCast);
holder.tvStory = (TextView) convertView.findViewById(R.id.tvStory);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
final ProgressBar progressBar = (ProgressBar) convertView.findViewById(R.id.progressBar);
ImageLoader.getInstance().displayImage(movieModelList.get(position).getImage(), holder.ivMovieIcon, new ImageLoadingListener() {
#Override
public void onLoadingStarted(String imageUri, View view) {
progressBar.setVisibility(View.VISIBLE);
}
#Override
public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
progressBar.setVisibility(View.GONE);
}
#Override
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
progressBar.setVisibility(View.GONE);
}
#Override
public void onLoadingCancelled(String imageUri, View view) {
progressBar.setVisibility(View.GONE);
}
});
holder.tvMovie.setText(movieModelList.get(position).getMovie());
holder.tvTagline.setText(movieModelList.get(position).getTagline());
holder.tvYear.setText("Year : " + movieModelList.get(position).getYear());
holder.tvDuration.setText(movieModelList.get(position).getDuration());
holder.tvDirector.setText(movieModelList.get(position).getDirector());
// Rating Bar
holder.rbMovieRating.setRating(movieModelList.get(position).getRating() / 2);
Log.v("Rating is", "" + movieModelList.get(position).getRating() / 2);
StringBuffer stringBuffer = new StringBuffer();
for (MovieModel.Cast cast : movieModelList.get(position).getCastList()) {
stringBuffer.append(cast.getName() + ", ");
}
holder.tvCast.setText(stringBuffer);
holder.tvStory.setText(movieModelList.get(position).getStory());
return convertView;
}
class ViewHolder {
private ImageView ivMovieIcon;
private TextView tvMovie;
private TextView tvTagline;
private TextView tvYear;
private TextView tvDuration;
private TextView tvDirector;
private RatingBar rbMovieRating;
private TextView tvCast;
private TextView tvStory;
}
}
}

Try my Adapter code:
public class MyAdapter extends BaseAdapter implements OnClickListener {
Context con;
ArrayList<Model> mlist;
LayoutInflater inflater=null;
public MyAdapter(Context con,ArrayList<Model> list,SpinnerInterface sp)
{
this.con=con;
this.mlist=list;
inflater=(LayoutInflater)con.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// UNIVERSAL IMAGE LOADER SETUP
DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
.cacheOnDisc(true).cacheInMemory(true)
.imageScaleType(ImageScaleType.EXACTLY)
.displayer(new FadeInBitmapDisplayer(300)).build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(con)
.defaultDisplayImageOptions(defaultOptions)
.memoryCache(new WeakMemoryCache())
.discCacheSize(100 * 1024 * 1024).build();
ImageLoader.getInstance().init(config);
// END - UNIVERSAL IMAGE LOADER SETUP
}
#Override
public int getCount() {
// TODO Auto-generated method stub
return mlist.size();
}
#Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mlist.get(position);
}
#Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
#Override
public int getViewTypeCount() {
if (getCount() != 0)
return getCount();
return 1;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
model=mlist.get(position);
ViewHolder holder=null;
if(convertView==null){
convertView=inflater.inflate(R.layout.product_layour,parent,false);
holder=new ViewHolder();
holder.img1=(ImageView)convertView.findViewById(R.id.imageViewProductImage);
convertView.setTag(holder);
}else{ holder=(ViewHolder)convertView.getTag(); }
String img_url=model.getPhoto();
ImageLoader imageLoader = ImageLoader.getInstance();
DisplayImageOptions options = new DisplayImageOptions.Builder().cacheInMemory(true)
.cacheOnDisc(true).resetViewBeforeLoading(true)
.showImageForEmptyUri(R.drawable.productimg)
.showImageOnFail(R.drawable.productimg)
.showImageOnLoading(R.drawable.productimg).build();
//download and display image from url
imageLoader.displayImage(img_url,holder.img1, options);
return convertView;
}
private class ViewHolder{
public ImageView img1 ;
}
}
Hope it helps you

I am not able to get the gridview populated with textview in Android Fragment

i am not able to populate the imageview textview inside gridview using fragments.
It is showing blank intead of gridview populating in my project can please anyone see the code below and let me know what i have to change
And the populating the image and text is from the mysql database dynamically
public class StoreHomeFragment extends Fragment {
final ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.store_home, container, false);
final GridView gridView1 = (GridView)rootView.findViewById(R.id.store_home_gridview);
gridView1.setAdapter(new ImageAdapter(rootView.getContext(), MyArrList));
return rootView;
}
//Activity is created
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
String url = "http://192.168.1.132/Android/App/good.php"; //url where i am using select query and retrieving it from database
try {
JSONArray data = new JSONArray(getJSONUrl(url));
HashMap<String, String> map;
for(int i = 0; i < data.length(); i++){
JSONObject c = data.getJSONObject(i);//retrieving from db
map = new HashMap<String, String>();
map.put("name", c.getString("name"));
map.put("artist", c.getString("artist"));
map.put("price", c.getString("price"));
map.put("image", c.getString("image"));
MyArrList.add(map);
}
//gridView1.setAdapter(new ImageAdapter(this,MyArrList));
} catch (JSONException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
//I have used imageAdapter
class ImageAdapter extends BaseAdapter
{
private Context context;
public ImageView imageView;
private ArrayList<HashMap<String, String>> MyArr = new ArrayList<HashMap<String, String>>();
public ImageAdapter(Context c,ArrayList<HashMap<String, String>> list)
{
context = c;
MyArr = list;
}
public int getCount() {
return MyArr.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = inflater.inflate(R.layout.store_home_gridview_row, null);
}
TextView tv_title = (TextView) convertView.findViewById(R.id.textview_name);
tv_title.setText("Title:"+MyArr.get(position).get("name"));
TextView tv_artist = (TextView) convertView.findViewById(R.id.textview_artist);
tv_artist.setText("Artist:"+MyArr.get(position).get("artist"));
TextView tv_duration = (TextView) convertView.findViewById(R.id.textview_price);
tv_duration.setText("Price:"+MyArr.get(position).get("price"));
String abc = (MyArr.get(position).get("image"));
String abcd = "http://192.168.1.132/images/products/"+abc;
imageView = (ImageView) convertView.findViewById(R.id.imageView1);
try
{
URL url3 = null;
try {
url3 = new URL(abcd);
} catch (Exception e) {
e.printStackTrace();
}
Bitmap bmp = BitmapFactory.decodeStream(url3.openConnection().getInputStream()); //image is populated
imageView.setImageBitmap(bmp);
}
catch(Exception par)
{
imageView.setImageResource(android.R.drawable.ic_menu_report_image);
}
return convertView;
}
}
/*** Get JSON Code from URL ***/
public String getJSONUrl(String url) {
StringBuilder str = new StringBuilder();
HttpClient client = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
try
{
HttpResponse response = client.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
System.out.println ( "status Code : " + statusCode );
if (statusCode == 200)
{
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null)
{
str.append(line);
}
}
else
{
Log.e("Log", "Failed to download file..");
}
}
catch (ClientProtocolException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
System.out.println ( "str : " + str.toString() );
return str.toString();
}
}

Follow the steps Hope this helps you
1) Remove these lines from onCreateView() method
final GridView gridView1 = (GridView)rootView.findViewById(R.id.store_home_gridview);
gridView1.setAdapter(new ImageAdapter(rootView.getContext(), MyArrList));
2)Modify onActivityCreated() as follow
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
new AsyncTask<Void, Void, Void>() {
#Override
protected Void doInBackground(Void... params) {
String url = "http://192.168.1.132/Android/App/good.php";
try {
JSONArray data = new JSONArray(getJSONUrl(url));
HashMap<String, String> map;
for (int i = 0; i < data.length(); i++) {
JSONObject c = data.getJSONObject(i);
map = new HashMap<String, String>();
map.put("name", c.getString("name"));
map.put("artist", c.getString("artist"));
map.put("price", c.getString("price"));
map.put("image", c.getString("image"));
MyArrList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
final GridView gridView1 = (GridView) rootView.findViewById(R.id.store_home_gridview);
gridView1.setAdapter(new ImageAdapter(getActivity(), MyArrList));
}
}.execute();
}