Develop Reference

Clear ListView if response is a empty array?

I have two spinners the first one for month and the second for years.I am trying to call a method send_date() if on Item Selected is called for any of the 2 spinners.
So I have two problems:- 1)send_date() gets called twice the first
time it gets the correct data as expected but the 2nd time it returns
a empty array. 2)When I select another month or year the old data does
not get removed that is the list does not refresh.
The following is my code for on Item Selected :-
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
int i = spinYear.getSelectedItemPosition();
selected_year = years.get(i);
Log.d("Selection Year",selected_year);
tv_year.setText(selected_year);
try {
send_date();
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
And for the month spinner:-
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
int j = spinMonths.getSelectedItemPosition();
selected_month = Months[j];
Date date = null;
try {
date = new SimpleDateFormat("MMMM").parse(selected_month);
} catch (ParseException e) {
e.printStackTrace();
}
Calendar cal = Calendar.getInstance();
cal.setTime(date);
tv_month.setText(String.valueOf(cal.get(Calendar.MONTH)+1));
Log.d("Selection Month",selected_month);
try {
send_date();
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
On response I call the following method for populating the list view with data:-
public void showBS(String response)
{
ParseBS_all pb = new ParseBS_all(response);
pb.parseBS();
bl = new BS_allList(getActivity(),ParseBS_all.doc_no,ParseBS_all.balance,ParseBS_all.total,ParseBS_all.vat,ParseBS_all.profit);
lv_bsall.setAdapter(bl);
}
This is the code for the send_date method:-
//This method is used to send month and year
private void send_date() throws JSONException {
final String year = tv_year.getText().toString();
final String month = tv_month.getText().toString();
StringRequest stringRequest = new StringRequest(Request.Method.POST, SEND_DATE,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//display.setText("This is the Response : " + response);
String resp = response.toString().trim();
if (resp.equals("Nothing to display"))
{
Toast.makeText(getContext(), "Nothing to Display", Toast.LENGTH_SHORT).show();
// bl.clear();
lv_bsall.setAdapter(bl);
bl.notifyDataSetChanged();
}else
{
Toast.makeText(getContext(), "Response" + response, Toast.LENGTH_LONG).show();
Log.d("RESPONSE for date", response.toString().trim());
showBS(response);
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}) {
#Override
protected Map<String, String> getParams() throws AuthFailureError {
GlobalClass gvar = (GlobalClass) getActivity().getApplicationContext();
String dbname = gvar.getDbname();
Map<String, String> params = new HashMap<>();
params.put(KEY_DBNAME, dbname);
params.put(KEY_MONTH, month);
params.put(KEY_YEAR,year);
return params;
}
};
RequestQueue requestQ = Volley.newRequestQueue(getContext());
requestQ.add(stringRequest);
}
Adapter code for list view.
public class BS_allList extends ArrayAdapter<String>
{
private String[] doc_no;
private String[] balance;
private String[] total;
private String[] vat;
private String[] profit;
private Activity context;
public BS_allList(Activity context, String[] doc_no, String[]balance, String[] total, String[] vat, String[] profit)
{
super(context, R.layout.bs_list_all, doc_no);
this.context =context;
this.doc_no= doc_no;
this.balance = balance;
this.total = total;
this.vat=vat;
this.profit = profit;
}
#Override
public View getView(int position, View listViewItem, ViewGroup parent)
{
if (null == listViewItem)
{
LayoutInflater inflater = context.getLayoutInflater();
listViewItem = inflater.inflate(R.layout.bs_list_all, null, true);
}
TextView tv_docNo = (TextView) listViewItem.findViewById(R.id.tvdoc_no);
TextView tv_balance = (TextView) listViewItem.findViewById(R.id.tv_balance);
TextView tv_tot = (TextView) listViewItem.findViewById(R.id.tv_total);
TextView tv_vat = (TextView) listViewItem.findViewById(R.id.tv_vat);
TextView tv_pf = (TextView) listViewItem.findViewById(R.id.tv_profit);
tv_docNo.setText(doc_no[position]);
tv_balance.setText(balance[position]);
tv_tot.setText(total[position]);
tv_vat.setText(vat[position]);
tv_pf.setText(profit[position]);
return listViewItem;
}
}
Also note that I have set the spinner to point to the current month and year so the first time it works properly.
I am new to programming so any help or suggestion is appreciated.Thank you.

Hi #AndroidNewBee,
As per our discussion made following changes in your code and you will get proper output and it will resolve your issues.
if (resp.equals("Nothing to display"))
{
Toast.makeText(getContext(), "Nothing to Display", Toast.LENGTH_SHORT).show();
bl = new BS_allList(getActivity(),{""},{""},{""},{""},{""});
lv_bsall.setAdapter(bl);
}
And second is check validation as below,
try {
if((selected_year != null & selected_year.length > 0 ) & (tv_month.getText().toString() != null & tv_month.getText().toString().length > 0))
{
send_date();
}
} catch (JSONException e) {
e.printStackTrace();
}

First you shouldn't be using so many String[], instead wrap them in a class
Class BSDataModel{
private String doc_no;
private String balance;
private String total;
private String vat;
private String profit;
//getters and setters
}
Now the reponse result should be added as in ,it returns List<BSDataModel>
List<BSDataModel> reponseList = new ArrayList<>();
//for example adding single response
for(int i=0;i<jsonArrayResponse.length();i++){
BSDataModel singleResponse = new BSDataModel();
singleResponse.setDocNo(jsonArrayResponse.get(i).getString("doc_no"));
singleResponse.setBalace(jsonArrayResponse.get(i).getString("balance"));
//etc..finall add that single response to responseList
reponseList.add(singleResponse);
}
BS_allList.java
public class BS_allList extends ArrayAdapter<BSDataModel>
{
private List<BSDataModel> bsList;
private Activity context;
public BS_allList(Activity context,List<BSDataModel> bsList)
{
super(context, R.layout.bs_list_all, bsList);
this.context =context;
this.bsList = bsList;
}
#Override
public View getView(int position, View listViewItem, ViewGroup parent)
{
if (null == listViewItem)
{
LayoutInflater inflater = context.getLayoutInflater();
listViewItem = inflater.inflate(R.layout.bs_list_all, null, true);
}
TextView tv_docNo = (TextView) listViewItem.findViewById(R.id.tvdoc_no);
TextView tv_balance = (TextView) listViewItem.findViewById(R.id.tv_balance);
TextView tv_tot = (TextView) listViewItem.findViewById(R.id.tv_total);
TextView tv_vat = (TextView) listViewItem.findViewById(R.id.tv_vat);
TextView tv_pf = (TextView) listViewItem.findViewById(R.id.tv_profit);
BSDataModel bsData = bsList.get(position);
tv_docNo.setText(bsData.getDoc());
tv_balance.setText(bsData.getBalance());
tv_tot.setText(bsData.getTot());
tv_vat.setText(bsData.getVat());
tv_pf.setText(bsData.getPF());
return listViewItem;
}
}
Now in your class
BS_allList bl = new BS_allList(getActivity(),responseList);//which you got above
After receiving new Response
// remove old data
responseList.clear(); // list items in the sense list of array used to populate listview
if(newresponseArray.size() > 0){
for(int i=0;i<newjsonArrayResponse.length();i++){
BSDataModel singleResponse = new BSDataModel();
singleResponse.setDocNo(newjsonArrayResponse.get(i).getString("doc_no"));
singleResponse.setBalace(newjsonArrayResponse.get(i).getString("balance"));
//etc..finall add that single response to responseList
reponseList.add(singleResponse);
}
}
//refresh listview
bl.notifyDataSetChanged();

Try this way,
1. adapter.clear();
2. Add/Remove your list Items.
3. listview.setAdapter(adapter);
4. adapter.notifyDatasetChanged();
this procedure should work.

sent parameter to adapter in same class android

I have public class StudioDetail (main class) and in StudioDetail I generate private class SendfeedbackKelas like this :
private class SendfeedbackKelas extends AsyncTask<String, Void, String> {
private static final String LOG_TAG = "CariKelas";
Bundle extras = getIntent().getExtras();
final String token= extras.getString("TOKEN");
final String idstudio= extras.getString("STUDIO_ID");
#Override
protected String doInBackground(String... params) {
String date = params[0];
Utils.log("params 1:" + date);
// do above Server call here
kelasstudioList = new ArrayList<KelasStudioModel>();
String responseString = null;
final String url_kelas_studio = Constant.URI_BASE_STUDIO + idstudio + "/class" + "?date=" + date + "&token=" + token;
Utils.log("url kelas studio:"+ url_kelas_studio);
try
{
runOnUiThread(new Runnable() {
public void run() {
new JSONAsyncTask().execute(url_kelas_studio);
ListView listview = (ListView) findViewById(R.id.listView1);
adapter = new ClassSAdapter(context, R.layout.jadwalstudio_info, kelasstudioList);
listview.setAdapter(adapter);
}
});
}
catch (Exception e)
{
/*Toast.makeText(context,
"user not registered", Toast.LENGTH_SHORT).show();*/
Log.e(LOG_TAG, String.format("Error during login: %s", e.getMessage()));
}
return "processing";
}
protected void onPostExecute(Boolean result) {
//dialog.cancel();
}
}
that called ClassSAdapter like this :
private class ClassSAdapter extends ArrayAdapter<KelasStudioModel> {
final Context context = getContext();
ArrayList<KelasStudioModel> kelasstudioList;
LayoutInflater vi;
int Resource;
ViewHolder holder;
public ClassSAdapter(Context context, int resource, ArrayList<KelasStudioModel> objects) {
super(context, resource, objects);
vi = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Resource = resource;
kelasstudioList = objects;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View.OnClickListener listener1 = new View.OnClickListener() {
#Override
public void onClick(View v) {
int position = (int)v.getTag();
// do stuff based on position or kelasList.get(position)
// you can call mActivity.startActivity() if you need
final Dialog dialog = new Dialog(context);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.setContentView(R.layout.dialog_popup_pesan_kelas);
closedialog = (ImageView) dialog.findViewById(R.id.closeDialog);
// if button is clicked, close the custom dialog
closedialog.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
/*studio_name.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context, StudioDetail.class);
startActivity(intent);
}
});*/
dialog.show();
}
};
View.OnClickListener listener2 = new View.OnClickListener() {
#Override
public void onClick(View v) {
int position = (int)v.getTag();
// do stuff based on position or kelasList.get(position)
// you can call mActivity.startActivity() if you need
final Dialog dialog = new Dialog(context);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.setContentView(R.layout.dialog_popup_pelatih);
/*final String url_studio_image = Constant.URI_FRONTEND + "vendor_trainer/20150821052441-tanda-tanya.jpg";
Utils.log("url_studio_image: " + url_studio_image);
new DownloadImageTask((ImageView) dialog.findViewById(R.id.class_image_pelatih)).execute(url_studio_image);*/
closedialog = (ImageView) dialog.findViewById(R.id.closeDialog);
// if button is clicked, close the custom dialog
closedialog.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
};
// convert view = design
View v = convertView;
if (v == null) {
holder = new ViewHolder();
v = vi.inflate(Resource, null);
holder.kelas = (TextView) v.findViewById(R.id.kelas);
holder.waktu = (TextView) v.findViewById(R.id.waktu);
holder.pelatih = (TextView) v.findViewById(R.id.pelatih);
// set OnClickListeners
holder.kelas.setOnClickListener(listener1);
holder.pelatih.setOnClickListener(listener2);
v.setTag(holder);
} else {
holder = (ViewHolder) v.getTag();
}
//holder.imageview.setImageResource(R.drawable.promo_1);
holder.kelas.setText(kelasstudioList.get(position).getKelas());
holder.waktu.setText(kelasstudioList.get(position).getWaktu());
holder.pelatih.setText(kelasstudioList.get(position).getPelatih());
// set tags
holder.kelas.setTag(position);
holder.waktu.setTag(position);
holder.pelatih.setTag(position);
return v;
}
private class ViewHolder {
public TextView kelas;
public TextView waktu;
public TextView pelatih;
}
}
I want to sent some parameter like this from class JSONAsyncTask to private class ClassSAdapter on View.OnClickListener listener1 and View.OnClickListener listener2 :
final String startdate=object.getString("startdate");
final String masterclass_name=Html.fromHtml((String) object.getString("masterclass_name")).toString();
final String enddate=object.getString("enddate");
final String trainer_name=Html.fromHtml((String) object.getString("trainer_name")).toString();
How to sent that parameter?
As information here is JSONAsynTask class:
class JSONAsyncTask extends AsyncTask<String, Void, Boolean> {
ProgressDialog dialog;
private static final String TAG_CLASSES = "classes";
#Override
protected void onPreExecute() {
super.onPreExecute();
dialog = new ProgressDialog(context);
dialog.setMessage("Loading, please wait");
dialog.setTitle("Connecting server");
dialog.show();
dialog.setCancelable(false);
}
#Override
protected Boolean doInBackground(String... urls) {
try {
HttpGet httppost = new HttpGet(urls[0]);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(httppost);
// StatusLine stat = response.getStatusLine();
int status = response.getStatusLine().getStatusCode();
if (status == 200) {
HttpEntity entity = response.getEntity();
String responseAsText = EntityUtils.toString(entity);
Utils.log("daftar isi classes: " + responseAsText);
JSONObject jsonObj = new JSONObject(responseAsText);
// Getting JSON Array node
JSONArray classes = jsonObj.getJSONArray(TAG_CLASSES);
for(int i=0;i<classes.length();i++){
//HashMap<String, String> promo = new HashMap<String, String>();
JSONObject object = classes.getJSONObject(i);
final String startdate=object.getString("startdate");
final String masterclass_name=Html.fromHtml((String) object.getString("masterclass_name")).toString();
final String enddate=object.getString("enddate");
final String trainer_name=Html.fromHtml((String) object.getString("trainer_name")).toString();
KelasStudioModel actor = new KelasStudioModel();
String starttime = parseDateToHis((String) object.getString("startdate")).toString();
String endtime = parseDateToHis((String) object.getString("enddate")).toString();
actor.setKelas(Html.fromHtml((String) object.getString("masterclass_name")).toString());
actor.setWaktu(starttime + "-" + endtime);
actor.setPelatih(object.getString("trainer_name"));
kelasstudioList.add(actor);
}
return true;
}
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return false;
}
protected void onPostExecute(Boolean result) {
dialog.cancel();
adapter.notifyDataSetChanged();
if(result == false){
Toast.makeText(context, "Unable to fetch data from server", Toast.LENGTH_LONG).show();
}else{
}
}
}
listener 1 and listener 2 called different dialog.

FragmentPagerAdapter dynamic tabs and page count

My application pulls data from a web service that generates different sections for each user. Then I am going to use these sections to create tabs using FragmentPagerAdapter.
I have used an Async task to pull data from the web service. However the overridden methods such as getCount() and getPageTitle() in the FragmentPagerAdapter executed prior to my asynctask and completes its job. How can I prevent this and generate dynamic number of tabs and their title name based on the data fetched from the web service?
In other words how can I create dynamic number of tabs and titles based on the data fetch from the web service
My Code for FragmentPagerAdapter as below. As you can see I have hard coded the amount of tabs as well as their title names.
public class SectionsPagerAdapter extends FragmentPagerAdapter{
private boolean proceedStatus = false;
private String requestURL = "xxxxxxxxxxxxxxxxxxxxxxxx";
//list of fragments need to be added dynamically
public final ArrayList<Fragment> screens = new ArrayList<Fragment>();
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new SectionFragment();
Bundle args = new Bundle();
args.putInt(SectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
return 2;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return "Camera".toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
case 3:
return "SECTION 4";
}
return null;
}
//setting the section title
private void setSectionTitle(){
}
//count the number of sections
private int countNumberofSections(){
int numberOfSection = 0;
return numberOfSection;
}
}
Then I have my Fragment code as below which has the the caller to the Async Task
public static class SectionFragment extends Fragment implements OnTaskCompleted {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private Slider adapter;
private ViewPager viewPager;
public static final String ARG_SECTION_NUMBER = "section_number";
Button thumbUpBut;
Button thumbDownBut;
Button captureButton;
ImageView genImage;
TextView genCaption;
private Camera mCamera;
private CameraPreview mPreview;
private static File mediaFile;
private ProgressDialog progress;
private static String imageSaveLocation;
private static String file_name_without_extension;
private ImageView imageView;
private Button uploadButton;
private Button cancelButton;
private Collection<Place> places = null;
private Collection<Happenings> events = null;
private Collection<General> general = null;
private ArrayList<String> sections;
public int getNumberOfPages(){
return sections.size();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_dummy,container, false);
TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
FeedRequest task = new FeedRequest(this);
task.execute("xxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
captureButton = (Button) rootView.findViewById(R.id.button_capture);
captureButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
takePhoto();
}
});
thumbUpBut = (Button) rootView.findViewById(R.id.thumbUp);
thumbUpBut.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Log.v("thumbPress", "thumbPressUp");
thumb("up");
}
});
thumbDownBut = (Button) rootView.findViewById(R.id.thumbDown);
thumbDownBut.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Log.v("thumbPress", "thumbPressDown");
thumb("down");
}
});
//allocating the activity one to the camera
if(getArguments().getInt(ARG_SECTION_NUMBER) == 1){
mCamera = getCameraInstance();
mPreview = new CameraPreview(this.getActivity(), mCamera);
FrameLayout preview = (FrameLayout)rootView.findViewById(R.id.camera_preview);
preview.addView(mPreview);
//hide buttons
thumbDownBut.setVisibility(rootView.INVISIBLE);
thumbUpBut.setVisibility(rootView.INVISIBLE);
}else{
thumbDownBut.setVisibility(rootView.VISIBLE);
thumbUpBut.setVisibility(rootView.VISIBLE);
captureButton.setVisibility(rootView.INVISIBLE);
}
viewPager = (ViewPager) rootView.findViewById(R.id.pager);
return rootView;
}
//take photo function
private void takePhoto() {
//get coordinates of the location
UserLocation userLocation = new UserLocation();
userLocation.getUserLocation(getActivity());
coordinates[0] = userLocation.longitude;
coordinates[1] = userLocation.latitude;
PictureCallback pictureCB = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera cam) {
new SavePhotoAndMetadata().execute(data);
cam.startPreview();
}
};
mCamera.takePicture(null, null, pictureCB);
}
//get camera instance
private Camera getCameraInstance() {
Camera camera = null;
try {
camera = Camera.open();
} catch (Exception e) {
// cannot get camera or does not exist
}
return camera;
}
//get the media out
private static File getOutputMediaFile() {
File mediaStorageDir = new File(Environment.getExternalStorageDirectory() + "/Android/data/asia.ceynet.realsnap/temp_img");
if (!mediaStorageDir.exists()) {
if (!mediaStorageDir.mkdirs()) {
Log.d("MyCameraApp", "failed to create directory");
return null;
}
}
// Create a media file name
String timeStamp = (DateFormat.format("dd-MM-yyyy hh:mm:ss", new java.util.Date()).toString());
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + timeStamp + ".jpg");
file_name_without_extension = "IMG_" + timeStamp;
imageSaveLocation = mediaFile.toString();
return mediaFile;
}
//saving the image and metadata together
class SavePhotoAndMetadata extends AsyncTask<byte[], String, String> {
#Override
protected String doInBackground(byte[]... data) {
File picFile = getOutputMediaFile();
if (picFile == null) {
return null;
}
byte[] photoData = data[0];
try {
//save the image
FileOutputStream fos = new FileOutputStream(picFile);
fos.write(photoData);
fos.close();
} catch (FileNotFoundException e) {
e.getStackTrace();
} catch (IOException e) {
e.getStackTrace();
}
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
progress = new ProgressDialog(getActivity());
progress.setMessage("Saving Picture..Please wait...");
progress.show();
}
#Override
protected void onPostExecute(String s) {
progress.dismiss();
imagePreviewDialog();
}
}
//save image metadata in async task
class SaveMetadataTask extends AsyncTask<Void, String, Void> {
#Override
protected Void doInBackground(Void... params) {
serializeDeserialize.serializeData("This is for testing", file_name_without_extension, Double.toString(coordinates[0]), Double.toString(coordinates[1]), deviceId, deviceEmail);
return null;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected void onPostExecute(Void v) {
}
}
//image preview dialog and its functionality
private void imagePreviewDialog(){
//setting the bitmap
Bitmap bmp = BitmapFactory.decodeFile(mediaFile.toString());
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Image Preview");
builder.setCancelable(false);
LayoutInflater inflater = getActivity().getLayoutInflater();
ViewGroup vg = (ViewGroup)inflater.inflate(R.layout.sanp_preview_layout, null);
ImageView image = (ImageView) vg.findViewById(R.id.imageView);
image.setImageBitmap(rotateBitmap(bmp));
builder.setView(vg);
//buttons
builder.setPositiveButton("Upload",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
if(checkInternetConnection.haveNetworkConnection(sContext)){
//upload the image
uploadImage();
//save image metadata
new SaveMetadataTask().execute();
}else{
Toast.makeText(sContext, "Error! No internet connection detected. Image will be uploaded on an active internet connection", Toast.LENGTH_LONG).show();
new SaveMetadataTask().execute();
}
}
});
builder.setNegativeButton("Discard",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
discardImage(mediaFile.toString());
dialog.dismiss();
}
});
builder.show();
}
private Bitmap rotateBitmap(Bitmap image){
int width=image.getHeight();
int height=image.getWidth();
Bitmap srcBitmap=Bitmap.createBitmap(width, height, image.getConfig());
for (int y=width-1;y>=0;y--)
for(int x=0;x<height;x++)
srcBitmap.setPixel(width-y-1, x,image.getPixel(x, y));
return srcBitmap;
}
//device email
private String getDeviceEmail(){
AccountManager accountManager = AccountManager.get(sContext);
Account[] account = accountManager.getAccountsByType("com.google");
//device email
for(Account accLoop : account){
deviceEmail = accLoop.name;
}
return deviceEmail;
}
//upload image to the server
private void uploadImage(){
//save metadata
//call upload service
Intent intent = new Intent(sContext, HttpUploader.class);
Bundle loc = new Bundle();
loc.putDoubleArray("ss", coordinates);
intent.putExtra("url", PHOTO_UPLOAD);
intent.putExtra("paths", mediaFile.toString());
intent.putExtra("deviceid", deviceId);
intent.putExtra("deviceemail", getDeviceEmail());
intent.putExtra("posttext", "This is for testing");
intent.putExtra("filename", file_name_without_extension);
intent.putExtra("geo", loc);
sContext.startService(intent);
Toast.makeText(getActivity(), "Your image is being uploaded", Toast.LENGTH_LONG).show();
}
//discard image when the discard button is pressed
private void discardImage(String imagePath){
File file = new File(imagePath);
try{
file.delete();
}catch(Exception e){
Log.e("IMAGE_DELETION_ERROR", e.toString());
}
}
#Override
public void onTaskCompleted(boolean status, String message) {
// TODO Auto-generated method stub
Log.e("onTaskCompleted", "success" + status);
if (message == "tumb UP success") {
thumbUpBut.setSelected(true);
thumbDownBut.setSelected(false);
Log.e("tumb", "tumb");
} else if (message == "tumb DOWN success") {
thumbDownBut.setSelected(true);
thumbUpBut.setSelected(false);
Log.e("tumb", "tumb");
}
}
//listener for fetching main objects
#Override
public void onFeedCompleted(ArrayList<Posts> postArray, Multimap<String, Object> multiMap) {
// TODO Auto-generated method stub
numberOfPages = postArray.size();
adapter = new Slider(getActivity(), postArray, getContext());
viewPager.setAdapter(adapter);
// displaying selected image first
viewPager.setCurrentItem(postArray.size());
//saving the keyset
Set<String> keys = multiMap.keySet();
sections = new ArrayList<String>();
//sorting the categories and creating the category list
for(String key:keys){
//getting category list
if(!sections.contains(keys)){
sections.add(key);
}
//sorting categories
if(key.equals("Place")){
places.add((Place) multiMap.get(key));
}else if(key.equals("Events")){
events.add((Happenings) multiMap.get(key));
}else if(key.equals("General")){
general.add((General) multiMap.get(key));
}
}
}
//adding the pages to the adaptor dynamically
public void addPagesDynamically(){
}
}
//create the parent directory
private void createParentDiectory(){
File dir = new File(Environment.getExternalStorageDirectory() + "/Android/data/asia.ceynet.realsnap");
if(!(dir.exists() && dir.isDirectory())) {
dir.mkdirs();
}
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.action_post:
openPost();
return true;
case R.id.action_settings:
// openSettings();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void openPost() {
/*
Intent i = new Intent(getApplicationContext(), PhotoActivity.class);
startActivity(i);
*/
}
public static void thumb(String type) {
SectionFragment d = new SectionFragment();
PostThumb task = new PostThumb(type, d);
task.execute("xxxxxxxxxxxxxxxxxxxxxxxxxxxx");
}
//broadcast receiver for picture upload
public class MyWebRequestReceiver extends BroadcastReceiver {
public static final String PROCESS_RESPONSE = "asia.ceynet.intent.action.PROCESS_RESPONSE";
#Override
public void onReceive(Context context, Intent intent) {
//String responseString = intent.getStringExtra(HttpUploader.RESPONSE_STRING);
String reponseMessage = intent.getStringExtra(HttpUploader.RESPONSE_MESSAGE);
String responseStatus = intent.getStringExtra(HttpUploader.RESPONSE_STATUS);
String file_to_be_deleted = intent.getStringExtra(HttpUploader.FILE_NAME_WITHOUT_EXTENSION);
Toast.makeText(getApplicationContext(), reponseMessage + " - " + file_to_be_deleted + ".jpg", Toast.LENGTH_LONG).show();
//if uploaded successfully delete or image and metadata
if(responseStatus.equals("true")){
File temp_image_dir = new File(Environment.getExternalStorageDirectory() + "/Android/data/asia.ceynet.realsnap/temp_img/" + file_to_be_deleted + ".jpg");
File metadata_file = new File(Environment.getExternalStorageDirectory() + "/Android/data/asia.ceynet.realsnap/temp_img/" + file_to_be_deleted + ".ser");
try{
temp_image_dir.delete();
metadata_file.delete();
}catch(Exception e){
Log.e("IMAGE_DELETION_ERROR", e.toString());
}
}
}
}

When you finnish pulling the async data, provide the adapter with the new data and call .notifyDataSetChanged() on that adapter instance and the framework will update the pages and count by itself.
If you wish a more detailed explanation post your FragmentPagerAdapter implementation.

First of all, let me apologize if I'm not making myself clear enough because this is one of my first participation(s) here. But I'll be always here to answer queries related to this answer and clear any confusions arose by my statements.
Since you're using fragments, so I'm assuming you must have included your fragments inside an activity (lets say MainActivity.java).
What you need, can be done inside that activity containing fragment.
Here is the example code of onCreate method inside the MainActivity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fragmentManager = getSupportFragmentManager();
//Instance of viewpager included inside activity_main.xml
viewPager = (ViewPager) findViewById(R.id.vpMain);
SectionsPagerAdapter adapter = new SectionsPagerAdapter (fragmentManager);
//Adding some fragments right from the beginning, you could ignore it if not needed.
addFragments();
//This `OnPageChangeListener` will do the trick for you.
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
//Show the title of fragment
Toast.makeText(MainActivity.this, adapter.screens.get(position), Toast.LENGTH_SHORT).show();
//If fragment being loaded is later than the first one,
// then add one more fragment after the last fragment to the adapter.
// integer currentPosition is declared as a field, outside onCreate method and initially set to 0.
if(position>currentPosition){
currentPosition+=1;
adapter.addFragment(new SectionFragment(), "Fragment"+String.valueOf(position+3));
adapter.notifyDataSetChanged();
}else{
currentPosition--;
}
}
#Override
public void onPageScrollStateChanged(int state) {
}
});
} // onCreate ends here.
Create this method inside your MainActivity (just to add 3 fragments to give your application a head-start.
private void addFragments(){
adapter.addFragment(new SectionFragment());
adapter.addFragment(new SectionFragment());
adapter.addFragment(new SectionFragment());
}
Then modify your SectionsPagerAdapter's getItem and getCount methods as below:
public class SectionsPagerAdapter extends FragmentPagerAdapter{
private boolean proceedStatus = false;
private String requestURL = "xxxxxxxxxxxxxxxxxxxxxxxx";
//list of fragments need to be added dynamically
public final ArrayList<Fragment> screens = new ArrayList<Fragment>();
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return screens.get(position);
}
#Override
public int getCount() {
return screens.size();
}
//This method will dynamically add a fragment each time it is called.
public void addFragment(Fragment fragment) {
screens.add(fragment);
}
Now, no work related to "adding new fragment to the list" needs to be done inside your SectionFragment class.

ListView Doesn't display anymore than 8 ImageViews

I am decoding jpeg images from a server request I get using json. I display them with a custom ListView Adapter along with a little text.
The images display correctly for the first 8 ImageViews in the ListView, however, after that it will no longer display the image (it will display the text). For example, if I have a total of 10 images, the last two images will not show in the ListView, but if I delete the first 2 images, the last two will show, so there is no concern about retrieving the actual images.
On my main activity (NotesActivity) I have a button that goes to another activity which does an asyntask, and in that async task in the onPostExecute, it returns back to the main activity where it should show the updated list (and it does, unless there are more than 8 images).
I don't know where to begin, any suggestions?
My Activity that contains the ListView
public class NotesActivity extends Activity implements OnClickListener {
String key = "NOTES";
String key2 = "UPDATE_NOTES";
Gson gson = new Gson();
// Notes myNotes = new Notes();
NotesList myNotes = new NotesList();
String bId;
String res = null;
EditText notes;
Button save;
private Button createNote;
private int position;
private String type;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.notes_layout);
createNote = (Button) findViewById(R.id.notes_layout_btn_createNote);
Bundle bundle = this.getIntent().getExtras();
position = bundle.getInt("position");
type = bundle.getString("type");
//
if (type.equals("LISTINGS")) {
Listings it = ListingsFragment.myListings.getListings().get(
position);
bId = it.getBID();
notes = (EditText) findViewById(R.id.notes);
}
//
if (type.equals("SHARED")) {
Listings it = SharedFragment.myShared.getListings().get(position);
bId = it.getBID();
notes = (EditText) findViewById(R.id.notes);
}
GetNotes getNotes = new GetNotes();
try {
NotesList copy = new NotesList();
getNotes.execute(key, bId).get();
for (int j = 0; j < myNotes.getNotes().size(); j++) {
Notes note = myNotes.getNotes().get(j);
System.out.println("Removed value: " + note.getIsRemoved());
if (note.getIsRemoved() == null) {
copy.getNotes().add(note);
}
}
NotesAdapter adapter = new NotesAdapter(this, R.layout.note_row,
copy.getNotes());
ListView lv = (ListView) findViewById(R.id.notes_layout_lv_notesList);
lv.setAdapter(adapter);
} catch (Exception e) {
}
createNote.setOnClickListener(this);
}
private class GetNotes extends AsyncTask<String, String, NotesList> {
#Override
protected NotesList doInBackground(String... things) {
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("key", things[0]));
postParameters.add(new BasicNameValuePair("bId", things[1]));
// String valid = "1";
String response = null;
try {
response = CustomHttpClient.executeHttpPost(
"http://propclip.dev/mobile.php", postParameters);
res = response.toString();
// System.out.println("This is the response " + res);
// res = res.trim();
// res= res.replaceAll("\\s+","");
// error.setText(res);
// System.out.println(res);
myNotes = gson.fromJson(res, NotesList.class);
// System.out.println(res);
} catch (Exception e) {
res = e.toString();
}
return myNotes;
}
#Override
protected void onPostExecute(NotesList res) {
}
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.notes_layout_btn_createNote:
ProfileDataSource datasource = new ProfileDataSource(this);
datasource.open();
PropClipGlobal pcg = datasource.getUserIdenity();
Intent intent = new Intent(this, NewNoteActivity.class);
intent.putExtra("bId", bId);
intent.putExtra("uId", pcg.getUID());
intent.putExtra("username", pcg.getEm());
intent.putExtra("position", position);
intent.putExtra("type", type);
startActivity(intent);
}
}
}
My custom adapter
public class NotesAdapter extends ArrayAdapter<Notes> {
List<Notes> notes;
Context context;
public NotesAdapter(Context context, int resource, List<Notes> notes) {
super(context, resource, notes);
this.notes = notes;
this.context = context;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi;
vi = LayoutInflater.from(getContext());
v = vi.inflate(R.layout.note_row, null);
}
Notes note = notes.get(position);
ImageView icon = (ImageView) v.findViewById(R.id.note_row_icon);
TextView name = (TextView) v.findViewById(R.id.note_row_name);
TextView message = (TextView) v.findViewById(R.id.note_row_message);
TextView date = (TextView) v.findViewById(R.id.note_row_date);
String input = note.getNoteDate();
SimpleDateFormat inputDf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat outputDf = new SimpleDateFormat("dd, yyyy");
SimpleDateFormat monthFormat = new SimpleDateFormat("MM");
Date myDate = null;
try {
myDate = inputDf.parse(input);
} catch (ParseException e) {
e.printStackTrace();
}
String month = monthFormat.format(myDate);
date.setText(getMonth(Integer.parseInt(month)) + " "
+ outputDf.format(myDate));
message.setText(note.getNote());
name.setText(note.getFirstName() + " " + note.getLastName());
// System.out.println(p.getFileData());
byte[] imageAsBytes = Base64.decode(note.getFileData().getBytes(),
position);
icon.setImageBitmap(BitmapFactory.decodeByteArray(imageAsBytes, 0,
imageAsBytes.length));
System.out.println(note.getFileData());
return v;
}
public String getMonth(int month) {
return new DateFormatSymbols().getMonths()[month - 1];
}
}
Activity which eventually goes to the main activity (NotesActivity)
public class NewNoteActivity extends Activity implements OnClickListener {
private String uId;
private String bId;
private String username;
private String response;
private String key = "UPDATE_NOTES";
private Button submit;
private EditText note;
private int position;
private String type;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_new_note);
submit = (Button) findViewById(R.id.activity_new_note_btn_submit);
note = (EditText) findViewById(R.id.activity_new_note_et_note);
Intent intent = getIntent();
bId = intent.getStringExtra("bId");
uId = intent.getStringExtra("uId");
username = intent.getStringExtra("username");
position = intent.getIntExtra("position", 0);
type = intent.getStringExtra("type");
submit.setOnClickListener(this);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.new_note, menu);
return true;
}
private class UpdateNotes extends AsyncTask<String, String, String> {
#Override
protected String doInBackground(String... values) {
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("key", values[0]));
postParameters.add(new BasicNameValuePair("bId", values[1]));
postParameters.add(new BasicNameValuePair("uId", values[2]));
postParameters.add(new BasicNameValuePair("username", values[3]));
postParameters.add(new BasicNameValuePair("note", values[4]));
String response = null;
try {
response = CustomHttpClient.executeHttpPost(
"http://propclip.dev/mobile.php", postParameters);
response = response.toString();
} catch (Exception e) {
response = e.toString();
}
return null;
}
#Override
protected void onPostExecute(String response) {
Intent intent = new Intent(getApplicationContext(),
NotesActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("position", position);
intent.putExtra("type", type);
startActivity(intent);
Toast toast = Toast.makeText(getApplicationContext(),"Added note!", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}
}
#Override
public void onClick(View v) {
String noteMessage = note.getText().toString();
UpdateNotes updateNotes = new UpdateNotes();
updateNotes.execute(key, bId, uId, username, noteMessage);
}
}

Fragment Tabs not Appearing

In my program i am showing multilevel Listview, but whenever i am calling another Activity then Fragment Tabs are not appearing.
I am using this great tutorial: http://www.androidbegin.com/tutorial/android-actionbarsherlock-viewpager-tabs-tutorial/
See below Images, 1st Level ListView:
2nd Level ListView:
ListCategoryFragment.xml:-
public class ListCategoryFragment extends SherlockFragment implements OnItemClickListener {
ListView lview3;
ListCategoryAdapter adapter;
private ArrayList<Object> itemList;
private ItemBean bean;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragmenttab1.xml
View view = inflater.inflate(R.layout.fragment_category_tab, container, false);
prepareArrayList();
lview3 = (ListView) view.findViewById(R.id.listView1);
adapter = new ListCategoryAdapter(getActivity(), itemList);
lview3.setAdapter(adapter);
lview3.setOnItemClickListener(this);
return view;
}
private static final int categoryFirst = 0;
private static final int categorySecond = 1;
private static final int categoryThird = 2;
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
// Set up different intents based on the item clicked:
switch (position)
{
case categoryFirst:
Intent intent1 = new Intent(getActivity(), ListItemActivity.class);
intent1.putExtra("category", "Category - 1");
startActivity(intent1);
break;
case categorySecond:
Intent intent2 = new Intent(getActivity(), ListItemActivity.class);
intent2.putExtra("category", "Category - 2");
startActivity(intent2);
break;
case categoryThird:
Intent intent3 = new Intent(getActivity(), ListItemActivity.class);
intent3.putExtra("category", "Category - 3");
startActivity(intent3);
break;
default:
break;
}
}
public void prepareArrayList()
{
itemList = new ArrayList<Object>();
AddObjectToList("Category - 1");
AddObjectToList("Category - 2");
AddObjectToList("Category - 3");
}
// Add one item into the Array List
public void AddObjectToList(String title)
{
bean = new ItemBean();
bean.setTitle(title);
itemList.add(bean);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
setUserVisibleHint(true);
}
}
ListItemActivity.java:-
public class ListItemActivity extends SherlockFragmentActivity {
static String URL = "http://www.site.url/tone.json";
static String KEY_CATEGORY = "item";
static final String KEY_TITLE = "title";
ListView list;
ListItemAdapter adapter;
/** Called when the activity is first created. */
#SuppressWarnings("deprecation")
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
getActionBar().setDisplayHomeAsUpEnabled(true);
setContentView(R.layout.activity_item_list);
final ArrayList<HashMap<String, String>> itemsList = new ArrayList<HashMap<String, String>>();
list = (ListView) findViewById(R.id.listView1);
adapter = new ListItemAdapter(this, itemsList);
list.setAdapter(adapter);
Bundle bdl = getIntent().getExtras();
KEY_CATEGORY = bdl.getString("category");
if (isNetworkAvailable()) {
new MyAsyncTask().execute();
} else {
AlertDialog alertDialog = new AlertDialog.Builder(ListItemActivity.this).create();
alertDialog.setMessage("The Internet connection appears to be offline.");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
private Intent getDefaultShareIntent(){
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, "SUBJECT");
intent.putExtra(Intent.EXTRA_TEXT, "TEXT");
startActivity(Intent.createChooser(intent, "Share via"));
return intent;
}
/** The event listener for the Up navigation selection */
#Override
public boolean onOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
switch(item.getItemId())
{
case android.R.id.home:
finish();
break;
case R.id.menu_item_share:
getDefaultShareIntent();
break;
}
return true;
}
private boolean isNetworkAvailable() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
return (info != null);
}
class MyAsyncTask extends
AsyncTask<String, Integer, ArrayList<HashMap<String, String>>> {
private ProgressDialog progressDialog = new ProgressDialog(
ListItemActivity.this);
#Override
protected void onPreExecute() {
progressDialog.setMessage("Loading, Please wait.....");
progressDialog.show();
}
final ArrayList<HashMap<String, String>> itemsList = new ArrayList<HashMap<String, String>>();
#Override
protected ArrayList<HashMap<String, String>> doInBackground(
String... params) {
HttpClient client = new DefaultHttpClient();
// Perform a GET request for a JSON list
HttpUriRequest request = new HttpGet(URL);
// Get the response that sends back
HttpResponse response = null;
try {
response = client.execute(request);
} catch (ClientProtocolException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Convert this response into a readable string
String jsonString = null;
try {
jsonString = StreamUtils.convertToString(response.getEntity()
.getContent());
} catch (IllegalStateException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Create a JSON object that we can use from the String
JSONObject json = null;
try {
json = new JSONObject(jsonString);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
JSONArray jsonArray = json.getJSONArray(KEY_CATEGORY);
for (int i = 0; i < jsonArray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsonObject = jsonArray.getJSONObject(i);
map.put("id", String.valueOf(i));
map.put(KEY_TITLE, jsonObject.getString(KEY_TITLE));
itemsList.add(map);
}
return itemsList;
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
return null;
}
#Override
protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
list = (ListView) findViewById(R.id.listView1);
adapter = new ListItemAdapter(ListItemActivity.this, itemsList);
list.setAdapter(adapter);
TextView lblTitle = (TextView) findViewById(R.id.text);
lblTitle.setText(KEY_CATEGORY);
this.progressDialog.dismiss();
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
HashMap<String, String> map = itemsList.get(position);
Intent in = new Intent(ListItemActivity.this, ListItemDetailActivity.class);
in.putExtra(KEY_TITLE, map.get(KEY_TITLE));
startActivity(in);
}
});
}
}
}

This is the normal behavior because you are moving from the Fragment Activity to a normal Activity. But only your first activity has the tabs.
The correct way of doing this is to remove the intents and the new activities. Instead it should be replaced with fragments itself.
For example, in the list item click, stop calling the Intent to the new fragment activity, and replace it calling a fragment itself.
There will be only one Activity and that will be the one which is holding the tabs and all others should be fragments. You just need to replace the fragments from within the same activity.