Develop Reference

Convert Activity into Fragment

I made a navigation in my project, than I have activities, I would made menu from those activities into navigation. so I need to convert those activities into fragments.
This my first activity.java
public class ToDoList extends AppCompatActivity implements BatListener, OnItemClickListener, OnOutsideClickedListener {
private BatRecyclerView mRecyclerView;
private BatAdapter mAdapter;
private List<BatModel> mGoals;
private BatItemAnimator mAnimator;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.to_do_list);
// Navigator
FoldingTabBar tabBar = (FoldingTabBar) findViewById(R.id.folding_tab_bar);
tabBar.setOnFoldingItemClickListener(new FoldingTabBar.OnFoldingItemSelectedListener() {
#Override
public boolean onFoldingItemSelected(#NotNull MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_profile:
Intent intent0 = new Intent(ToDoList.this, Home.class);
startActivity(intent0);
break;
case R.id.menu_todo:
break;
case R.id.menu_schedule:
Intent intent1 = new Intent(ToDoList.this, TimeTable.class);
startActivity(intent1);
break;
case R.id.menu_settings:
break;
}
return false;
}
});
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("");
((TextView) findViewById(R.id.text_title)).setTypeface(TypefaceUtil.getAvenirTypeface(this));
mRecyclerView = (BatRecyclerView) findViewById(R.id.bat_recycler_view);
mAnimator = new BatItemAnimator();
mRecyclerView.getView().setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.getView().setAdapter(mAdapter = new BatAdapter(mGoals = new ArrayList<BatModel>() {{
}}, this, mAnimator).setOnItemClickListener(this).setOnOutsideClickListener(this));
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new BatCallback(this));
itemTouchHelper.attachToRecyclerView(mRecyclerView.getView());
mRecyclerView.getView().setItemAnimator(mAnimator);
mRecyclerView.setAddItemListener(this);
findViewById(R.id.root).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mRecyclerView.revertAnimation();
}
});
}
#Override
public void add(String string) {
mGoals.add(0, new Goal(string));
mAdapter.notify(AnimationType.ADD, 0);
}
#Override
public void delete(int position) {
mGoals.remove(position);
mAdapter.notify(AnimationType.REMOVE, position);
}
#Override
public void move(int from, int to) {
if (from >= 0 && to >= 0) {
mAnimator.setPosition(to);
BatModel model = mGoals.get(from);
mGoals.remove(model);
mGoals.add(to, model);
mAdapter.notify(AnimationType.MOVE, from, to);
if (from == 0 || to == 0) {
mRecyclerView.getView().scrollToPosition(Math.min(from, to));
}
}
}
#Override
public void onClick(BatModel item, int position) {
Toast.makeText(this, item.getText(), Toast.LENGTH_SHORT).show();
}
#Override
public void onOutsideClicked() {
mRecyclerView.revertAnimation();
}
}
I tried to use this code, from Mr Abhi instruction, I just edited a little bit for removing the toolbar, and some I solved.
This is my fragment.java
public class ToDoListFragment extends Fragment implements BatListener, OnItemClickListener, OnOutsideClickedListener {
private BatRecyclerView mRecyclerView;
private BatAdapter mAdapter;
private List<BatModel> mGoals;
private BatItemAnimator mAnimator;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.todo_list_fragment, null);
return root;
}
public void onViewCreated(View view, Bundle savedInstanceState) {
// you can add listener of elements here
/*Button mButton = (Button) view.findViewById(R.id.button);
mButton.setOnClickListener(this); */
((TextView) view.findViewById(R.id.tdl_date)).setTypeface(TypefaceUtil.getAvenirTypeface(getActivity()));
mRecyclerView = (BatRecyclerView) view.findViewById(R.id.tdl_bat_recyclerView);
mAnimator = new BatItemAnimator();
mRecyclerView.getView().setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.getView().setAdapter(mAdapter = new BatAdapter(mGoals = new ArrayList<BatModel>() {{
}}, this, mAnimator).setOnItemClickListener(this).setOnOutsideClickListener(this));
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new BatCallback(this));
itemTouchHelper.attachToRecyclerView(mRecyclerView.getView());
mRecyclerView.getView().setItemAnimator(mAnimator);
mRecyclerView.setAddItemListener(this);
view.findViewById(R.id.root).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mRecyclerView.revertAnimation();
}
});
}
#Override
public void add(String string) {
mGoals.add(0, new Goal(string));
mAdapter.notify(AnimationType.ADD, 0);
}
#Override
public void delete(int position) {
mGoals.remove(position);
mAdapter.notify(AnimationType.REMOVE, position);
}
#Override
public void move(int from, int to) {
if (from >= 0 && to >= 0) {
mAnimator.setPosition(to);
BatModel model = mGoals.get(from);
mGoals.remove(model);
mGoals.add(to, model);
mAdapter.notify(AnimationType.MOVE, from, to);
if (from == 0 || to == 0) {
mRecyclerView.getView().scrollToPosition(Math.min(from, to));
}
}
}
#Override
public void onClick(BatModel item, int position) {
Toast.makeText(getActivity(), item.getText(), Toast.LENGTH_SHORT).show();
}
#Override
public void onOutsideClicked() {
mRecyclerView.revertAnimation();
}
But it crushed when I started the app. the log showed that No view found for id 0x7f09004c (package:id/container) for fragment.
I hope you guys could help me as you teach me. Thanks for the second time.

To convert an Activity to a Fragment, you first have to extend Fragment. then you'll have to make some basic necessary changes in the code like:
1.onCreateView(LayoutInflater, ViewGroup, Bundle) instead of onCreate
2.findViewById() becomes getView().findViewById().
Your sample code:
public class ToDoList extends Fragment implements BatListener, OnItemClickListener, OnOutsideClickedListener {
private BatRecyclerView mRecyclerView;
private BatAdapter mAdapter;
private List<BatModel> mGoals;
private BatItemAnimator mAnimator;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View root = inflater.inflate(R.layout.todo_list_fragment, null);
return root;
}
public void onViewCreated(View view, Bundle savedInstanceState) {
// you can add listener of elements here
/*Button mButton = (Button) view.findViewById(R.id.button);
mButton.setOnClickListener(this); */
// Navigator
FoldingTabBar tabBar = (FoldingTabBar) view.findViewById(R.id.folding_tab_bar);
tabBar.setOnFoldingItemClickListener(new FoldingTabBar.OnFoldingItemSelectedListener() {
#Override
public boolean onFoldingItemSelected(#NotNull MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_profile:
Intent intent0 = new Intent(ToDoList.this, Home.class);
startActivity(intent0);
break;
case R.id.menu_todo:
break;
case R.id.menu_schedule:
Intent intent1 = new Intent(ToDoList.this, TimeTable.class);
startActivity(intent1);
break;
case R.id.menu_settings:
break;
}
return false;
}
});
((AppCompatActivity)getActivity()).setSupportActionBar(toolbar);
((TextView) view.findViewById(R.id.text_title)).setTypeface(TypefaceUtil.getAvenirTypeface(this));
mRecyclerView = (BatRecyclerView) view.findViewById(R.id.bat_recycler_view);
mAnimator = new BatItemAnimator();
mRecyclerView.getView().setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.getView().setAdapter(mAdapter = new BatAdapter(mGoals = new ArrayList<BatModel>() {{
}}, this, mAnimator).setOnItemClickListener(this).setOnOutsideClickListener(this));
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new BatCallback(this));
itemTouchHelper.attachToRecyclerView(mRecyclerView.getView());
mRecyclerView.getView().setItemAnimator(mAnimator);
mRecyclerView.setAddItemListener(this);
view.findViewById(R.id.root).setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mRecyclerView.revertAnimation();
}
});
}
#Override
public void add(String string) {
mGoals.add(0, new Goal(string));
mAdapter.notify(AnimationType.ADD, 0);
}
#Override
public void delete(int position) {
mGoals.remove(position);
mAdapter.notify(AnimationType.REMOVE, position);
}
#Override
public void move(int from, int to) {
if (from >= 0 && to >= 0) {
mAnimator.setPosition(to);
BatModel model = mGoals.get(from);
mGoals.remove(model);
mGoals.add(to, model);
mAdapter.notify(AnimationType.MOVE, from, to);
if (from == 0 || to == 0) {
mRecyclerView.getView().scrollToPosition(Math.min(from, to));
}
}
}
#Override
public void onClick(BatModel item, int position) {
Toast.makeText(this, item.getText(), Toast.LENGTH_SHORT).show();
}
#Override
public void onOutsideClicked() {
mRecyclerView.revertAnimation();
}
}
I haven't edited all code and further changes maybe required. Do the changes accordingly.

How to sort recyclerView, Bold item if unread and unbold if item opened?

I have 2 Activities in my application.
activityMain contain 3 Fragments
The third fragment is a conversations list. This is a recylerView where each Item leads to a specific chat.
activityConversation contains a Chat.
First, i would like to sort the conversations in the the recyclerView in order of "Last actives". The most recent active should be displayed on top of the list, the second last active on second postition etc...
Secondly, each Item of the recyclerView contains a Textview. For each item, I would like to display the last message posted in the related chat in this Texview.
Finally, i would like to display these Item textViews in Bold since the conversation has not been opened until the last chat update.
Has anyone an Idea to help me achieve that?
Here my Chat Activity:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_conversation);
getWindow().setBackgroundDrawableResource(R.drawable._background_black_lchatxxxhdpi) ;
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
LinearLayout leftNav = (LinearLayout)findViewById(R.id.conv_left_nav);
LinearLayout helperAdmin = (LinearLayout) getLayoutInflater().inflate(R.layout.list_participant_admin, leftNav, false);
leftNav.addView(helperAdmin);
final EditText input_post = (EditText)findViewById(R.id.input_post);
context = this;
input_post.addTextChangedListener(new TextWatcher() {
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
ImageButton btn_submit = (ImageButton)findViewById(R.id.btn_submit);
btn_submit.setEnabled(!TextUtils.isEmpty(s.toString().trim()));
}
#Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
Intent intent = getIntent();
if (intent.hasExtra("conversationId"))
conversationId = intent.getStringExtra("conversationId");
rpcHelper = new RPCHelper(context, this);
String unique_device_id = Settings.Secure.getString(this.getContentResolver(), Settings.Secure.ANDROID_ID);
Log.i("US", unique_device_id);
rpcHelper.loginOrRegister(unique_device_id, new AsyncResponseListener() {
#Override
public void onResponse(JSONArray response) throws JSONException {
refreshConversation();
}
#Override
public void onResponse() {
}
#Override
public void onResponse(Bitmap bm) {
}
#Override
public void onPreExecute() {
}
});
dbHelper = new DataBaseHelper(context, "us", null, Statics.DB_VERSION);
userInConv = dbHelper.dbReader.getUserInConversation(Integer.parseInt(conversationId));
storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
leftRecycler = (RecyclerView) helperAdmin.findViewById(R.id.conv_left_recycler);
//mRecyclerView.setHasFixedSize(true);
// use a linear layout manager
leftLayoutManager = new LinearLayoutManager(this);
leftRecycler.setLayoutManager(leftLayoutManager);
leftAdapter = new ConvLeftAdapter(userInConv, storageDir, Integer.parseInt(conversationId));
leftRecycler.setAdapter(leftAdapter);
helpersImg = new View[3];
helpers = new DataBaseReader.User[3];
photos = dbHelper.dbReader.getPhotosInConversation(Integer.parseInt(conversationId));
photoRecycler = (RecyclerView) findViewById(R.id.photo_recycler);
photoLayoutManager = new GridLayoutManager(this, Math.max(photos.length, 1));
photoRecycler.setLayoutManager(photoLayoutManager);
rightAdapter = new ConvRightAdapter(photos, storageDir, context);
photoRecycler.setAdapter(rightAdapter);
IntentFilter filter = new IntentFilter(Statics.ACTION_NEW_POST);
this.registerReceiver(new BroadcastReceiver() {
#Override
public void onReceive(Context ctx, Intent intent) {
Log.d("new", " message");
refreshConversation();
}
}, filter);
}
#Override
public void onNewIntent(Intent intent){
if (intent.hasExtra("conversationId"))
conversationId = intent.getStringExtra("conversationId");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_conversation, menu);
DataBaseReader.Conversation conversation = dbHelper.dbReader.getConversation(conversationId);
DataBaseReader.User owner = dbHelper.dbReader.getConversationOwner(conversationId);
final ImageView owner_img = (ImageView)findViewById(R.id.img_userprofilpic);
TextView owner_name = (TextView)findViewById(R.id.lbl_username_owner);
TextView owner_city = (TextView)findViewById(R.id.lbl_usercity_owner);
TextView conversation_question = (TextView)findViewById(R.id.question_text);
owner_name.setText(owner.name);
owner_city.setText(owner.city);
conversation_question.setText(conversation.question.text);
conversation_question.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
TextView text = (TextView)findViewById(R.id.question_text);
int maxLines = TextViewCompat.getMaxLines(text);
if (maxLines==2){
text.setMaxLines(Integer.MAX_VALUE);
}
else{
text.setMaxLines(2);
}
}
});
rpcHelper.getPhoto(storageDir + "/", owner.photo, new AsyncResponseListener() {
#Override
public void onResponse(JSONArray response) throws JSONException {
}
#Override
public void onResponse() {
}
#Override
public void onResponse(Bitmap bm) {
owner_img.setImageBitmap(bm);
}
#Override
public void onPreExecute() {
}
});
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(mToggle.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
public void refreshConversation(){
dbHelper.dbSyncer.syncPosts(rpcHelper.user_id, new AsyncResponseListener() {
#Override
public void onResponse(JSONArray response) throws JSONException {
DataBaseReader.Post[] posts = dbHelper.dbReader.getPosts(conversationId);
postsRecycler = (RecyclerView) findViewById(R.id.posts_recycler);
postsLayoutManager = new LinearLayoutManager(context);
postsRecycler.setLayoutManager(postsLayoutManager);
postsAdapter = new PostsAdapter(posts, storageDir, rpcHelper);
postsRecycler.setAdapter(postsAdapter);
postsRecycler.scrollToPosition(postsAdapter.getItemCount() - 1);
}
#Override
public void onResponse() {
}
#Override
public void onResponse(Bitmap bm) {
}
#Override
public void onPreExecute() {
}
});
/*
rpcHelper.getPosts(conversationId, new AsyncResponseListener(){
#Override
public void onResponse(JSONArray response) throws JSONException {
LinearLayout posts_root = (LinearLayout) findViewById(R.id.posts_root);
posts_root.removeAllViews();
for (int i = 0; i < response.length(); i++){
Log.d("Conv refresh", response.get(i) + "");
final JSONObject jConversation = (JSONObject) response.get(i);
LinearLayout post;
if (jConversation.getString("userId") == rpcHelper.user_id) {
post = (LinearLayout) getLayoutInflater().inflate(R.layout.item_chatpost_sent, posts_root, false);
}
else{
post = (LinearLayout) getLayoutInflater().inflate(R.layout.item_chatpost_received, posts_root, false);
((TextView)post.findViewById(R.id.post_name_)).setText(jConversation.getString("name"));
}
((TextView)post.findViewById(R.id.lbl_message_chat)).setText(jConversation.getString("text"));
posts_root.addView(post);
}
hideProcessDialog();
}
#Override
public void onResponse() {
}
#Override
public void onResponse(Bitmap bm) {
}
#Override
public void onPreExecute() {
}
});*/
}
public void onSubmit(View v){
final EditText input_post = (EditText)findViewById(R.id.input_post);
String post_text = input_post.getText().toString();
rpcHelper.post(conversationId, post_text, new AsyncResponseListener() {
#Override
public void onResponse(JSONArray response) throws JSONException {
refreshConversation();
input_post.setText("");
}
#Override
public void onResponse() {
}
#Override
public void onResponse(Bitmap bm) {
}
#Override
public void onPreExecute() {
}
});
}
Button no = (Button)alertDialog.findViewById(R.id.btn_cancel);
no.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
helpersImg[0] = null;
helpersImg[1] = null;
helpersImg[2] = null;
helpers[0] = null;
helpers[1] = null;
helpers[2] = null;
alertDialog.dismiss();
}
});
}
public void onSelectUser(View v){
View vi = snapHelper.findSnapView(participantsLayoutManager);
if (helpersImg[0] == vi || helpersImg[1] == vi || helpersImg[2] == vi)
return;
Log.i("get helper Id", ""+ participantsAdapter.selectedUserId);
ImageView photo = (ImageView) vi.findViewById(R.id.img_userprofilpic);
photo.setDrawingCacheEnabled(true);
Bitmap bmap = photo.getDrawingCache();
ImageView helperImage = null;
if (helpersImg[0] == null) {
helperImage = (ImageView) alertDialog.findViewById(R.id.reward_dialog_helper0);
helpersImg[0] = vi;
helperImage.setImageBitmap(bmap);
photo.setColorFilter(Color.rgb(123, 123, 123), android.graphics.PorterDuff.Mode.MULTIPLY);
helpers[0] = userInConv[participantsAdapter.selectedUserId];
}
else if (helpersImg[1] == null){
helperImage = (ImageView) alertDialog.findViewById(R.id.reward_dialog_helper1);
helpersImg[1] = vi;
helperImage.setImageBitmap(bmap);
photo.setColorFilter(Color.rgb(123, 123, 123), android.graphics.PorterDuff.Mode.MULTIPLY);
helpers[1] = userInConv[participantsAdapter.selectedUserId];
}
else if (helpersImg[2] == null){
helperImage = (ImageView) alertDialog.findViewById(R.id.reward_dialog_helper2);
helpersImg[2] = vi;
helperImage.setImageBitmap(bmap);
photo.setColorFilter(Color.rgb(123, 123, 123), android.graphics.PorterDuff.Mode.MULTIPLY);
helpers[1] = userInConv[participantsAdapter.selectedUserId];
}
else{
return;
}
}
/**private void showTipDialog(){
final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
LayoutInflater inflater = LayoutInflater.from(context);
final View dialogView = inflater.inflate(R.layout.dialog_add_tip, null);
final EditText value = (EditText) dialogView.findViewById(R.id.tip_value);
final SeekBar sb = (SeekBar) dialogView.findViewById(R.id.seekBar);
sb.setMax(50);
sb.setProgress(5);
sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean b) {
progress = (Math.round(progress/5 ))*5;
seekBar.setProgress(progress);
value.setText(String.valueOf(progress));
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
value.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// Convert text to integer. Do you already use editText.setInputType(InputType.TYPE_CLASS_NUMBER), don't you?
Integer enteredProgress = Integer.valueOf(s.toString());
sb.setProgress(enteredProgress);
}
#Override
public void afterTextChanged(Editable s) {}});
dialogBuilder.setView(dialogView);
alertDialog = dialogBuilder.create();
alertDialog.show();
Button ok = (Button)alertDialog.findViewById(R.id.btn_ok);
ok.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertDialog.dismiss();
}
});
Button no = (Button)alertDialog.findViewById(R.id.btn_no);
no.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
alertDialog.dismiss();
}
});
}*/
public void removeHelper(View v){
int index = 0;
if (v == alertDialog.findViewById(R.id.reward_dialog_helper0)){
index = 0;
}
else if (v == alertDialog.findViewById(R.id.reward_dialog_helper1)){
index = 1;
}
else if (v == alertDialog.findViewById(R.id.reward_dialog_helper2)){
index = 2;
}
if (helpersImg[index] == null){
return;
}
ImageView photo = (ImageView) helpersImg[index].findViewById(R.id.img_userprofilpic);
photo.setDrawingCacheEnabled(true);
photo.clearColorFilter();
helpersImg[index] = null;
helpers[index] = null;
ImageView imv = (ImageView)v;
imv.setImageResource(R.drawable.stroke_rounded_corners_white);
}
private void showProcessDialog(){
pd = new ProgressDialog(this);
pd.setTitle("Processing");
pd.setMessage("Please wait...");
pd.setCancelable(false);
pd.setIndeterminate(true);
pd.show();
}
private void hideProcessDialog(){
pd.hide();
}
#Override
public void onInternetConnectionLost() {
}
#Override
public void onInternetConnectionFound() {
}
public void onTakePicture(View v){
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, Statics.REQUEST_IMAGE_CAPTURE);
}
}
public void onTakePictureFromGallery(View v){
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent,
"Select Picture"), Statics.REQUEST_PROFILE_IMAGE_GALLERY);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Bitmap imageBitmap;
if ((requestCode == Statics.REQUEST_IMAGE_CAPTURE || requestCode == Statics.REQUEST_IMAGE_CAPTURE_0
|| requestCode == Statics.REQUEST_IMAGE_CAPTURE_1 || requestCode == Statics.REQUEST_IMAGE_CAPTURE_2) && resultCode == RESULT_OK && data != null) {
Bundle extras = data.getExtras();
if (extras == null){
return;
}
imageBitmap = (Bitmap) extras.get("data");
addPhoto(imageBitmap);
}
else if (requestCode == Statics.REQUEST_PROFILE_IMAGE_GALLERY && resultCode == RESULT_OK){
try {
imageBitmap = getBitmapFromUri(data.getData());
addPhoto(imageBitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void addPhoto(Bitmap image) {
DataBaseReader.Conversation c = dbHelper.dbReader.getConversation(conversationId);
String encodedImage = encodeBitmap(image);
rpcHelper.addPhotosToQuestion("" + c.question.id, encodedImage, null, null, new AsyncResponseListener() {
#Override
public void onResponse(JSONArray response) throws JSONException {
dbHelper.dbSyncer.sync(rpcHelper.user_id, new AsyncResponseListener() {
#Override
public void onResponse(JSONArray response) throws JSONException {
photos = dbHelper.dbReader.getPhotosInConversation(Integer.parseInt(conversationId));
photoRecycler = (RecyclerView) findViewById(R.id.photo_recycler);
photoLayoutManager = new GridLayoutManager(context, Math.max(photos.length, 1));
photoRecycler.setLayoutManager(photoLayoutManager);
rightAdapter = new ConvRightAdapter(photos, storageDir, context);
photoRecycler.setAdapter(rightAdapter);
}
#Override
public void onResponse() {
photos = dbHelper.dbReader.getPhotosInConversation(Integer.parseInt(conversationId));
photoRecycler = (RecyclerView) findViewById(R.id.photo_recycler);
photoLayoutManager = new GridLayoutManager(context, Math.max(photos.length, 1));
photoRecycler.setLayoutManager(photoLayoutManager);
rightAdapter = new ConvRightAdapter(photos, storageDir, context);
photoRecycler.setAdapter(rightAdapter);
}
#Override
public void onResponse(Bitmap bm) {
}
#Override
public void onPreExecute() {
}
});
}
#Override
public void onResponse() {
}
#Override
public void onResponse(Bitmap bm) {
}
#Override
public void onPreExecute() {
}
});
}
private String encodeBitmap(Bitmap bitmap){
try{
bitmap = Bitmap.createScaledBitmap(bitmap, Statics.BITMAP_WIDTH, Statics.BITMAP_HEIGHT, true);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 90, stream);
final byte[] imageInByte = stream.toByteArray();
return Base64.encodeToString(imageInByte, Base64.DEFAULT);
}
catch(Exception e){
return "";
}
}
private Bitmap getBitmapFromUri(Uri uri) throws IOException {
ParcelFileDescriptor parcelFileDescriptor =
getContentResolver().openFileDescriptor(uri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor);
parcelFileDescriptor.close();
return image;
}
}
This is my Fragment with conversations List:
public class ConversationFragment extends Fragment {
private View v;
private OnFragmentInteractionListener mListener;
public ConversationFragment() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* #return A new instance of fragment ConversationFragment.
*/
// TODO: Rename and change types and number of parameters
public static ConversationFragment newInstance() {
ConversationFragment fragment = new ConversationFragment();
Bundle args = new Bundle();
//args.putString(ARG_PARAM1, param1);
//args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
if (v == null) {
v = inflater.inflate(R.layout.fragment_conversation, container, false);
}
final SwipeRefreshLayout swipeRefresh = (SwipeRefreshLayout)v.findViewById(R.id.swiperefreshconv);
swipeRefresh.post(new Runnable() {
#Override
public void run() {
swipeRefresh.setRefreshing(true);
}
});
swipeRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
mListener.syncDb();
}
});
return v;
}
#Override
public void onStart(){
super.onStart();
mListener.refreshConversations();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
}
This is my Conversation Adapter:
public class ConversationsAdapter extends RecyclerView.Adapter {
private final File mStorageDir;
private final RPCHelper mRPCHelper;
private DataBaseReader.Conversation[] mDataset;
Context context;
// Provide a reference to the views for each data item
// Complex data items may need more than one view per item, and
// you provide access to all the views for a data item in a view holder
public static class ViewHolder extends RecyclerView.ViewHolder {
// each data item is just a string in this case
public View mView;
public ViewHolder(View v) {
super(v);
mView = v;
}
}
// Provide a suitable constructor (depends on the kind of dataset)
public ConversationsAdapter(DataBaseReader.Conversation[] myDataset, File storageDir) {
mDataset = myDataset;
mStorageDir = storageDir;
mRPCHelper = new RPCHelper();
}
// Create new views (invoked by the layout manager)
#Override
public ConversationsAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
// create a new view
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.item_conversations, parent, false);
ViewHolder vh = new ViewHolder(v);
context = parent.getContext();
return vh;
}
// Replace the contents of a view (invoked by the layout manager)
#Override
public void onBindViewHolder(ViewHolder holder, final int position) {
// - get element from your dataset at this position
// - replace the contents of the view with that element
Log.d("recy", "bind called");
TextView username = (TextView)holder.mView.findViewById(R.id.lbl_username);
final TextView message = (TextView)holder.mView.findViewById(R.id.question_text);
TextView date_and_time = (TextView)holder.mView.findViewById(R.id.lbl_date_and_time);
ImageView status_pending = (ImageView)holder.mView.findViewById(R.id.lbl_status_conversation_pending);
ImageView status_in = (ImageView)holder.mView.findViewById(R.id.lbl_status_conversation_in);
TextView keyword0 = (TextView)holder.mView.findViewById(R.id.post_keywords0);
TextView keyword1 = (TextView)holder.mView.findViewById(R.id.post_keywords1);
TextView keyword2 = (TextView)holder.mView.findViewById(R.id.post_keywords2);
ImageView userprofilpic = (ImageView)holder.mView.findViewById(R.id.img_userprofilpic);
LinearLayout answer_info = (LinearLayout) holder.mView.findViewById(R.id.answer_info);
Button delete_coversation = (Button) holder.mView.findViewById(R.id.btn_confirm_delete);
userprofilpic.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(context, UserProfileActivity.class);
i.putExtra("userId", mDataset[position].question.userId);
context.startActivity(i);
}
});
username.setText(mDataset[position].question.userName);
message.setText(mDataset[position].question.text);
keyword0.setText(mDataset[position].question.keywords[0]);
keyword1.setText(mDataset[position].question.keywords[1]);
keyword2.setText(mDataset[position].question.keywords[2]);
addImgToView(mDataset[position].question.photo, userprofilpic);
if (Integer.parseInt(mDataset[position].confirmed) == 1) {
status_pending.setEnabled(false);
status_pending.setVisibility(View.GONE);
status_in.setVisibility(View.VISIBLE);
answer_info.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
message.setTypeface(Typeface.DEFAULT);
message.onSaveInstanceState();
int convId = mDataset[position].id;
Intent i = new Intent(context, ConversationActivity.class);
i.putExtra("conversationId", "" + convId);
context.startActivity(i);
}
});
}
}
// Return the size of your dataset (invoked by the layout manager)
#Override
public int getItemCount() {
return mDataset.length;
}
private void addImgToView(final String uri, final ImageView v){
mRPCHelper.getPhoto(mStorageDir + "/", uri, new AsyncResponseListener() {
#Override
public void onResponse(JSONArray response) throws JSONException {
}
#Override
public void onResponse() {
}
#Override
public void onResponse(Bitmap bm) {
v.setImageBitmap(bm);
}
#Override
public void onPreExecute() {
}
});
}
}
Thank you in advance for your time.

maintain a flag in data level to know is it read or unread,based on that you can apply the styles.

There is two way to do this.
First you can ask to backend to write server side to query to handle last activity bases of timestamp .In this case you have to send your particular timestamp to server when you open particular conversation .
Other you can make local database ex-(sql database) and handle it in your own code by updating query when you reading or undreading conversation.

ViewPager does not redraw content on swipe back

Problem
I am new to android and i am using viewpager for the first time in my app and
i am suffering from very strange behavior in my app that is i am using viewpager with three fragments ( TrackFragment , AlbumFragment , ArtistFragment ) and when i swip page from TrackFragment to AlbumFragment and again come back to TrackFragment it becomes blank (but it was not at first time when i am at TrackFragment initially) and same thing happened when i jump to ArtistFragment or any other fragments from the tab layout (its become blank).
And in case when i am going to ArtistFragment from TrackFragment via AlbumFragments by swiping the pages it works correctly (that is contents are shown in pages).
Please suggest me a method to overcome the above problem or any other method to implement same thing.
Here is my code....
MainActivity
public class MainActivity extends AppCompatActivity {
private String[] mPlanetTitles={"Tracks","Album","Artist"};
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
SharedPreferences sharedPreferences;
Fragment [] fragments = {new TracksFragment(),new AlbumFragment(), new ArtistFragment()};
PagerAdapter pagerAdapter;
ViewPager viewPager;
public static ImageView im;
int pos= -1 ;
public static Context context;
MusicService musicService;
boolean mBound;
TabLayout tabLayout ;
public static Uri currentsonguri;
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPreferences = getSharedPreferences("lastplayed",Context.MODE_PRIVATE);
Intent i = new Intent(MainActivity.this,MusicService.class);
startService(i);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
mDrawerList.setAdapter(new NavigationDrawerAdapter(this));
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(position == 3)
{
Intent i = new Intent(MainActivity.this,PlaylistActivity.class);
startActivity(i);
}
if(position == 4)
{
Intent intent = new Intent();
intent.setAction("android.media.action.DISPLAY_AUDIO_EFFECT_CONTROL_PANEL");
if((intent.resolveActivity(getPackageManager()) != null)) {
startActivity(intent);
} else {
// No equalizer found :(
Toast.makeText(getBaseContext(),"No Equaliser Found",Toast.LENGTH_LONG).show();
}
}
}
});
tabLayout = (TabLayout) findViewById(R.id.tablayout);
viewPager = (ViewPager) findViewById(R.id.viewPager);
tabLayout.setTabTextColors(Color.DKGRAY,Color.WHITE);
tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);
context = getBaseContext();
pagerAdapter = new myfragment(getSupportFragmentManager());
im = (ImageView) findViewById(R.id.currentsong);
viewPager.setPageTransformer(true, new ZoomOutPageTransformer());
viewPager.setAdapter(pagerAdapter);
tabLayout.setupWithViewPager(viewPager,true);
SharedPreferences.Editor editor= sharedPreferences.edit();
if(sharedPreferences.getInt("count",0)==0)
{
editor.putInt("count",1);
}
else
{
int c= sharedPreferences.getInt("count",0);
Log.d("Uses count",c+"");
editor.putInt("count",c++);
editor.apply();
}
if(!sharedPreferences.getString("uri","").equals(""))
{
String s = sharedPreferences.getString("uri","");
Uri u = Uri.parse(s);
currentsonguri = u;
MediaMetadataRetriever data=new MediaMetadataRetriever();
data.setDataSource(getBaseContext(),u);
try {
byte[] b = data.getEmbeddedPicture();
Bitmap bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);
bitmap = getRoundedCornerBitmap(bitmap);
im.setImageBitmap(bitmap);
}
catch (Exception e)
{
e.printStackTrace();
}
try {
musicService.setsongbyuri(u,getBaseContext());
musicService.setMediaPlayer();
}
catch (Exception e)
{
e.printStackTrace();
}
}
else
{
}
editor.apply();
im.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MusicPlayerActivity.class);
intent.setData(currentsonguri);
intent.putExtra("flag",1);
startActivity(intent);
}
});
final Uri r= getIntent().getData();
if(r!=null) {
currentsonguri = r;
Intent intent = new Intent(MainActivity.this, MusicPlayerActivity.class);
intent.setData(r);
intent.putExtra("flag",0);
startActivity(intent);
}
}
public class myfragment extends FragmentPagerAdapter {
myfragment(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return fragments[position];
}
#Override
public int getCount() {
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
String s = "non";
switch (position)
{
case 0 : s= "Tracks" ;
break;
case 1: s= "Albums" ;
break;
case 2: s= "Artist" ;
break;
}
return s;
}
}
public void setview(byte [] b, int position,Uri uri)
{
currentsonguri = uri;
Log.d("position in set view",""+position);
Log.d("fail","i am here");
if(im!=null)
{
if(b!=null)
{
Bitmap bitmap = BitmapFactory.decodeByteArray(b, 0, b.length);
bitmap = getRoundedCornerBitmap(bitmap);
im.setImageBitmap(bitmap);
}
else {
songDetailloader loader = new songDetailloader(context);
String s = loader.albumartwithalbum(loader.songalbum(position));
Log.d("fail","fail to set small image");
if (s != null) {
im.setImageBitmap(BitmapFactory.decodeFile(s));
Log.d("fail","nowsetting set small image");
} else {
im.setImageResource(R.drawable.default_track_light);
Log.d("ic","ic_launcher setted");
}
}
}
else {
Log.d(""," im is null");
}
}
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = 100;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
private ServiceConnection serviceConnection = new ServiceConnection() {
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
MusicService.LocalBinder binder = (MusicService.LocalBinder) service;
musicService = binder.getService();
mBound =true;
}
#Override
public void onServiceDisconnected(ComponentName name) {
mBound =false;
}
};
#Override
protected void onDestroy() {
super.onDestroy();
Log.d("MainActivity","Get distoryed");
}
#Override
protected void onResume() {
super.onResume();
Intent i = new Intent(this,MusicService.class);
bindService(i, serviceConnection, Context.BIND_AUTO_CREATE);
}
#Override
protected void onStart() {
super.onStart();
}
#Override
protected void onStop() {
super.onStop();
unbindService(serviceConnection);
}}
Tracks Fragment
public class TracksFragment extends Fragment {
songDetailloader loader = new songDetailloader();
ArrayList<Songs> give = new ArrayList<>();
public int pos = -1;
MediaPlayer mp ;
MusicService musicService;
boolean mBound;
ImageView search;
ListViewAdapter listViewAdapter;
RelativeLayout editreltive;
ListView listView;
EditText editText;
TextView ch;
private Cursor cursor ;
int albumindex,dataindex,titleindex,durationindex,artistindex;
private final static String[] columns ={MediaStore.Audio.Media.DATA, MediaStore.Audio.Media.DURATION, MediaStore.Audio.Media.ALBUM, MediaStore.Audio.Media.ARTIST, MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.IS_MUSIC,MediaStore.Audio.Media.IS_RINGTONE,MediaStore.Audio.Media.ARTIST,MediaStore.Audio.Media.SIZE ,MediaStore.Audio.Media._ID};
private final String where = "is_music AND duration > 10000 AND _size <> '0' ";
private final String orderBy = MediaStore.Audio.Media.TITLE;
public TracksFragment() {
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("fragment created","created");
setRetainInstance(true);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable final ViewGroup container, #Nullable Bundle savedInstanceState)
{
View v =inflater.inflate(R.layout.listviewofsongs,container,false);
listView = (ListView) v.findViewById(R.id.listView);
allsongs();
intlistview();
new Thread(new Runnable() {
#Override
public void run() {
Intent i = new Intent(getActivity(),MusicService.class);
getActivity().bindService(i, serviceConnection, Context.BIND_AUTO_CREATE);
}
}).start();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
Log.d("Uri of ",""+give.get(position).getSonguri());
musicService.setplaylist(give,give.get(position).getPosition());
musicService.setMediaPlayer();
view.setSelected(true);
}
});
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
View v =LayoutInflater.from(getContext()).inflate(R.layout.select_dialog_layout,null);
builder.setView(v);
builder.setTitle(give.get(position).gettitle()+"\n "+give.get(position).getalbum());
builder.create();
final AlertDialog d=builder.show();
//seting click listner.....
TextView play = (TextView) v.findViewById(R.id.dialogplay);
TextView playnext = (TextView) v.findViewById(R.id.dialogplaynext);
TextView queue = (TextView) v.findViewById(R.id.dialogqueue);
TextView fav = (TextView) v.findViewById(R.id.dialogaddtofav);
TextView album = (TextView) v.findViewById(R.id.dialogalbum);
TextView artist = (TextView) v.findViewById(R.id.dialogartist);
TextView playlist = (TextView) v.findViewById(R.id.dialogaddtoplaylsit);
TextView share = (TextView) v.findViewById(R.id.dialogshare);
TextView delete = (TextView) v.findViewById(R.id.dialogdelete);
TextView properties = (TextView) v.findViewById(R.id.dialogproperties);
play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
File f= new File(give.get(position).getSonguri().getLastPathSegment());
Log.d("LENGTH IS",""+f.length());
musicService.setplaylist(give,position);
musicService.setMediaPlayer();
d.dismiss();
}
});
playnext.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d.dismiss();
}
});
queue.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d.dismiss();
musicService.insertinqueue(give.get(position));
}
});
fav.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d.dismiss();
DataBaseClass db = new DataBaseClass(getContext());
int i=db.insetintoliked(give.get(position));
if(i==1)
{
Toast.makeText(getContext(),"Added to Favorites",Toast.LENGTH_SHORT).show();
}
else
Toast.makeText(getContext(),"Already in Favorites",Toast.LENGTH_SHORT).show();
}
});
album.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d.dismiss();
Intent i = new Intent( getActivity() , AlbumDetail.class);
Bundle b= new Bundle();
b.putCharSequence("album",give.get(position).getalbum());
i.putExtras(b);
startActivity(i);
}
});
artist.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i=new Intent(getActivity(),ArtistActivity.class);
i.putExtra("artist",give.get(position).getartist());
startActivity(i);
d.dismiss();
}
});
playlist.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d.dismiss();
}
});
delete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder b = new AlertDialog.Builder(getContext());
b.setMessage("Audio '"+give.get(position).gettitle()+"' will be deleted permanently !");
b.setTitle("Delete ?");
b.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
d.dismiss();
}
});
b.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
File f= new File(give.get(position).getSonguri().getPath());
boolean b = f.delete();
Log.d("Is file exist",f.exists()+"");
Log.d("File Lenth",""+f.length());
Log.d("Return value",""+b);
loader.set(getContext());
loader.deleteSong(getContext(),give.get(position).getPosition());
give.remove(position); // give is Arraylist of Songs(datatype);
listViewAdapter.notifyDataSetChanged();
if(b)
{
Toast.makeText(getContext(),"Deleted",Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getContext(),"Fail to Delete",Toast.LENGTH_SHORT).show();
}
}
});
b.create().show();
d.dismiss();
}
});
share.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
d.dismiss();
Intent share = new Intent(Intent.ACTION_SEND);
share.setType("audio/*");
share.putExtra(Intent.EXTRA_STREAM, give.get(position).getSonguri());
startActivity(Intent.createChooser(share, "Share Audio"));
}
});
properties.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder b = new AlertDialog.Builder(getContext());
File f= new File(give.get(position).getSonguri().getPath());
long size = (f.length())/1024;
long mb= size/1024;
long kb= size%1024;
b.setMessage("Size:"+"\n"+"Size "+mb+"."+kb+" MB\n"+"Path:"+f.getAbsolutePath()+"\n");
b.setTitle(f.getName());
b.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
b.create().show();
d.dismiss();
}
});
return true;
}
});
return v;
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Log.d("fragment","instance saved");
}
#Override
public void onViewStateRestored(#Nullable Bundle savedInstanceState) {
super.onViewStateRestored(savedInstanceState);
Log.d("Fragment","Instance Restored");
}
public void intlistview()
{
listViewAdapter = new ListViewAdapter(getContext(),give);
listView.setAdapter(listViewAdapter);
}
#Override
public void onDestroy() {
super.onDestroy();
Log.d("Fragment","Destroyed");
getActivity().unbindService(serviceConnection);
}
private ServiceConnection serviceConnection = new ServiceConnection() {
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
MusicService.LocalBinder binder = (MusicService.LocalBinder) service;
musicService = binder.getService();
mBound =true;
}
#Override
public void onServiceDisconnected(ComponentName name) {
mBound =false;
}
};
public void allsongs()
{
cursor = getContext().getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, columns, where, null, orderBy);
dataindex = cursor.getColumnIndex(MediaStore.Audio.Media.DATA);
albumindex = cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM);
titleindex = cursor.getColumnIndex(MediaStore.Audio.Media.TITLE);
durationindex = cursor.getColumnIndex(MediaStore.Audio.Media.DURATION);
artistindex = cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST);
cursor.moveToFirst();
for(int i=0;i<cursor.getCount();i++)
{
Songs song = new Songs();
song.setalbum(cursor.getString(albumindex));
song.settitle(cursor.getString(titleindex));
song.setSonguri(Uri.parse(cursor.getString(dataindex)));
song.setartist(cursor.getString(artistindex));
song.setDuration(Long.decode(cursor.getString(durationindex)));
song.setPosition(cursor.getPosition());
this.give.add(song);
cursor.moveToNext();
}
cursor.close();
}}
Album Fragment
public class AlbumFragment extends Fragment {
songDetailloader songDetailloader = new songDetailloader();
public AlbumFragment() {
super();
}
GridView gridView;
AlbumAdapter a;
private static ArrayList<Bitmap> image = new ArrayList<>();
LinearLayout linearLayout;
Cursor cursor ;
ImageView album;
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
final View v =inflater.inflate(R.layout.albumgridview,container,false);
gridView = (GridView) v.findViewById(R.id.gridview);
album = (ImageView) v.findViewById(R.id.albumart);
/*Animation animation = AnimationUtils.loadAnimation(getContext(),R.anim.grid_layout_anim);
GridLayoutAnimationController controller = new GridLayoutAnimationController(animation,0.2f,0.2f);
gridView.setLayoutAnimation(controller);*/
final TextView albumname = (TextView) v.findViewById(R.id.albumname);
cursor = songDetailloader.getAlbumCursor(getContext());
if(image.size()==0)
new getbitmaps().execute();
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String s = songDetailloader.albumart(position);
Intent i = new Intent( getActivity() , AlbumDetail.class);
Bundle b= new Bundle();
b.putCharSequence("album",songDetailloader.album(position));
i.putExtras(b);
startActivity(i);
}
});
return v;
}
public class getbitmaps extends AsyncTask<Void,Void,Void>
{
Bitmap b;
public getbitmaps() {
super();
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... params) {
for(int i=0;i<cursor.getCount();i++)
{
cursor.moveToPosition(i);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize= 2;
b=BitmapFactory.decodeFile(cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM_ART)),options);
if(b==null)
{
b=BitmapFactory.decodeFile(cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM_ART)));
}
image.add(b);
}
cursor.close();
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
a =new AlbumAdapter(getContext(),image);
a.setCursor();
gridView.setAdapter(a);
new Thread(new Runnable() {
#Override
public void run() {
songDetailloader.set(getContext());
}
}).start();
}
}}
Artist Fragment
public class ArtistFragment extends Fragment {
ListView listView ;
ArrayList<Artists> aa = new ArrayList<>();
final String[] columns3 = {MediaStore.Audio.Artists._ID, MediaStore.Audio.Artists.ARTIST,MediaStore.Audio.Artists.NUMBER_OF_ALBUMS,MediaStore.Audio.Artists.NUMBER_OF_TRACKS};
final static String orderBy3 = MediaStore.Audio.Albums.ARTIST;
public Cursor cursor3;
public ArtistFragment() {
super();
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v= inflater.inflate(R.layout.listviewofsongs,container,false);
listView = (ListView) v.findViewById(R.id.listView);
new artist().execute();
return v;
}
public class artist extends AsyncTask<Void, Void ,Void>
{
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... params) {
allartist();
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
ArtistAdapter artistAdapter = new ArtistAdapter(getActivity().getBaseContext(),aa);
listView.setAdapter(artistAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent i= new Intent(getActivity(), ArtistActivity.class);
i.putExtra("artist", aa.get(position).getArtistname());
i.putExtra("noofsongs",aa.get(position).getNofosongs());
startActivity(i);
}
});
}
}
#Override
public void setInitialSavedState(SavedState state) {
super.setInitialSavedState(state);
}
#Override
public void onViewStateRestored(#Nullable Bundle savedInstanceState) {
super.onViewStateRestored(savedInstanceState);
}
#Override
public void onDestroy() {
super.onDestroy();
}
public void allartist()
{
cursor3 = getContext().getContentResolver().query(MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI, columns3, null, null, orderBy3);
cursor3.moveToFirst();
for(int i=0;i< cursor3.getCount() ;i++)
{
Artists art = new Artists();
art.setArtistname(cursor3.getString(cursor3.getColumnIndex(MediaStore.Audio.Artists.ARTIST)));
art.setNoalbums(Integer.parseInt(cursor3.getString(cursor3.getColumnIndex(MediaStore.Audio.Artists.NUMBER_OF_ALBUMS))));
art.setNofosongs(Integer.parseInt(cursor3.getString(cursor3.getColumnIndex(MediaStore.Audio.Artists.NUMBER_OF_TRACKS))));
this.aa.add(art);
cursor3.moveToNext();
}
cursor3.close();
}}

Maybe you can try to add this property to you viewpager, in the onCreate method of your MainActivity :
viewPager.setOffscreenPageLimit(fragments.size());
Update
Another thing you could try is:
In your myfragment override getItemPosition in this way:
#Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
And add this code in your onCreate of your MainActivity:
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
int previousState;
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
#Override
public void onPageSelected(int position) {
}
#Override
public void onPageScrollStateChanged(int state) {
if (previousState == ViewPager.SCROLL_STATE_SETTLING && state == ViewPager.SCROLL_STATE_IDLE) {
pagerAdapter.notifyDataSetChanged();
}
previousState = state;
}
});
The aim of this code is not to be efficient, but to try to understand your problem.
Hope this can help you

Recycler view is creating same view again

This is what's happening..
i have taken screenshot of recyclerview
the view is creating again n again. I want that the view is jst created once for single data.
Maybe something with data.size() in getItemCount()
Adapter
public class ChatAdapter extends RecyclerView.Adapter<ChatAdapter.MyChatViewHolder> {
private LayoutInflater layoutInflater;
public ClickListener mClickListener;
List<fireInfo> Data= Collections.EMPTY_LIST;
public Context context;
private String EmailPref;
public ChatAdapter(){
//KEEP it empty !!
}
public ChatAdapter(Context context, List<fireInfo> Data) {
layoutInflater = LayoutInflater.from(context);
this.Data=Data;
}
#Override
public MyChatViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = layoutInflater.inflate(R.layout.chat_view_list, parent, false);
MyChatViewHolder viewHolder = new MyChatViewHolder(view);
Log.e("pavan", "hey im called chatADAPTER");
context = parent.getContext();
ButterKnife.bind(parent);
return viewHolder;
}
#Override
public void onBindViewHolder(MyChatViewHolder holder, int position) {
fireInfo current=Data.get(position);
Log.e("pavan", "hey im called chatADAPTER" + current.Namee);
String keylocal = current.KeyCur;
Log.e("pavan", "Chat Adapter key" + current.KeyCur+position);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
prefs.getString("keylocal"+position,keylocal+position);
if (keylocal!=null){
prefs.edit().putString("keylocal"+position,keylocal+position ).commit();
}
holder.mName.setText(current.Namee);
holder.mStatus.setText(current.UserStatus);
Picasso.with(context).load(current.ImageUrl).transform(new CircleTransform()).into(holder.mImageProfile);
}
public void setClickListener(ClickListener clickListener) {
this.mClickListener = clickListener;
}
public interface ClickListener{
public void itemClicked(View view,int position);
}
#Override
public int getItemCount() {
Log.e("pavan", "Chat Adapter data sizeee " +Data.size());
return Data.size();
}
how to solve this issue. Thanks in advance.
Edit: Addition
public class ChatFragment extends Fragment implements ClickListener,SheetLayout.OnFabAnimationEndListener{
// TODO: Customize parameter argument names
private static final String ARG_COLUMN_COUNT = "column-count";
private static int i=0;
private static int j;
List<fireInfo> Data= Collections.EMPTY_LIST;
// TODO: Customize parameters
private int mColumnCount = 1;
private ChatAdapter adapter;
private OnListFragmentInteractionListener mListener;
//private static String[] name=new String[40];
public static List<String> name =new LinkedList<>(Collections.<String>emptySet());
public static List<String> image = new LinkedList<>(Collections.<String>emptySet());
public static List<String> status = new LinkedList<>(Collections.<String>emptySet());
public static List<String> key = new LinkedList<>(Collections.<String>emptySet());
public Button mAddbutton;
public FloatingActionButton fab1;
public FloatingActionButton fab2;
public SheetLayout mSheetLayout ;
private static final int REQUEST_CODE = 1;
/**
* Mandatory empty constructor for the fragment manager to instantiate the
* fragment (e.g. upon screen orientation changes).
*/
public ChatFragment() {
}
// TODO: Customize parameter initialization
#SuppressWarnings("unused")
public static ChatFragment newInstance(int columnCount) {
ChatFragment fragment = new ChatFragment();
Bundle args = new Bundle();
args.putInt(ARG_COLUMN_COUNT, columnCount);
fragment.setArguments(args);
return fragment;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mColumnCount = getArguments().getInt(ARG_COLUMN_COUNT);
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_item_chat, container, false);
fab1 = (FloatingActionButton)view. findViewById(R.id.fabchat);
fab2 = (FloatingActionButton) view.findViewById(R.id.fabchat2);
Log.e("pavan", "hey Chatfragment called");
// Set the adapter
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.Chatlist);
adapter=new ChatAdapter(getActivity(),getDataOther());
//if(getDataOther()==null){
Log.e("pavan", "data NULL " + getDataOther());//}
adapter.setClickListener(this);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
AlphaInAnimationAdapter alphaAdapter = new AlphaInAnimationAdapter(adapter);
alphaAdapter.setDuration(500);
alphaAdapter.setInterpolator(new OvershootInterpolator(.5f));
alphaAdapter.setFirstOnly(false);
recyclerView.setAdapter(new ScaleInAnimationAdapter(alphaAdapter));
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
prefs.edit().putBoolean("CallAdd", false).commit();
mSheetLayout=(SheetLayout)view.findViewById(R.id.bottom_sheet);
mSheetLayout.setFab(fab1);
mSheetLayout.setFabAnimationEndListener(this);
fab1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (fab1.getVisibility() == View.VISIBLE) {
mSheetLayout.expandFab();
fab1.setVisibility(View.GONE);
fab2.setVisibility(View.VISIBLE);
}
}
});
return view;
}
#Override
public void onFabAnimationEnd() {
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.chatFARG, new AddFriendsFragment(), "Login");
ft.commit();
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == REQUEST_CODE){
mSheetLayout.contractFab();
}
}
enum Type {
AlphaIn {
List<fireInfo> Data= Collections.EMPTY_LIST;
public AnimationAdapter get(Context context) {
ChatAdapter adapter = new ChatAdapter(context, Data);
return new AlphaInAnimationAdapter(adapter);
}
}; public abstract AnimationAdapter get(Context context);
}
public static List<fireInfo> getDataOther(){
List<fireInfo>data=new ArrayList<>();
final Firebase mFirebaseRef = new Firebase(constants.FIREBASE_URL+"rootssahaj/authGplus");
Query queryRef = mFirebaseRef.orderByKey();
queryRef.addChildEventListener(new ChildEventListener() {
#TargetApi(Build.VERSION_CODES.KITKAT)
#Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
Log.e("pavan", "Query FIREBASE in CHAT FRAGMENT" + dataSnapshot.getKey());
List<fireInfo>data=new ArrayList<>();
if (!Objects.equals(dataSnapshot.getKey(), "sahaj9917730102#gmail")) {
key.add(i,dataSnapshot.getKey());
Log.e("pavan", "Query FIREBASE keyy" + dataSnapshot.getKey());
Log.e("pavan", "Query FIREBASE" + dataSnapshot.getValue());
Map<String, String> map = dataSnapshot.getValue(Map.class);
name.add(i, map.get("userNAME"));
image.add(i, map.get("picurl"));
status.add(i, map.get("status"));
i++;
}
}
#TargetApi(Build.VERSION_CODES.KITKAT)
#Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
List<fireInfo>data=new ArrayList<>();
if (!Objects.equals(dataSnapshot.getKey(), "sahaj9917730102#gmail")) {
Log.e("pavan", "Query FIREBASE" + dataSnapshot.getValue());
Map<String, String> map = dataSnapshot.getValue(Map.class);
// name.set(i, map.get("userNAME"));
// image.set(i, map.get("picurl"));
// name.set(i, map.get("status"));
// i++;
}
}
#TargetApi(Build.VERSION_CODES.KITKAT)
#Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
List<fireInfo>data=new ArrayList<>();
if (!Objects.equals(dataSnapshot.getKey(), "sahaj9917730102#gmail")) {
Log.e("pavan", "Query FIREBASE" + dataSnapshot.getValue());
Map<String, String> map = dataSnapshot.getValue(Map.class);
//name.set(i, map.get("userNAME"));
// image.set(i, map.get("picurl"));
// name.set(i, map.get("status"));
// i++;
}
}
#Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
#Override
public void onCancelled(FirebaseError firebaseError) {
}
});
for(int k=1;k<i;k++){
fireInfo current=new fireInfo();
current.Namee=name.get(k);
current.ImageUrl=image.get(k);
current.UserStatus=status.get(k);
current.KeyCur=key.get(k);
data.add(current);}
return data;
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnListFragmentInteractionListener) {
mListener = (OnListFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnListFragmentInteractionListener");
}
}
#Override
public void onDetach() {
super.onDetach();
mListener = null;
}
#Override
public void itemClicked(View view, int position) {
}
public interface OnListFragmentInteractionListener {
// TODO: Update argument type and name
void onListFragmentInteraction();
}
}
Edit: solution
I got it corrected, actually "Lucius Hipan" was correct there was the problem with passing of data.. the data was passed again n again n tht' why recyclerView was doing so. THANKS!

fragment is not updating after i checked the button in the base adapter

hi friends i am new to the android development i am developing an app similar to flipkart. i am using the tab layout where there are 4tabs 1.home 2.menu 3.cart 4.settings
Each tab consists of list view where each one is having fragment in it,when i click the menu button and select an item that i want to order,after ordering it, it is not loading in the cart so i am not able to locate the item in the cart
MenuAdapter.Java
public class Second_adapter extends BaseAdapter {
Context context;
TextView basename, SubItemprice, itemdesc, SubItemdesc;
LayoutInflater inflater;
ImageView order;
private List<JSONParser> items;
String itembasename, itemde, subtmsub, subitempri;
SharedPreferences.Editor loginPrefsEditor;
public Second_adapter(Context context, List<JSONParser> items) {
this.context = context;
this.items = items;
}
#Override
public int getCount() {
return items.size();
}
#Override
public Object getItem(int i) {
return items.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (view == null)
view = inflater.inflate(R.layout.item_clicked, viewGroup, false);
basename = (TextView) view.findViewById(R.id.basename);
SubItemprice = (TextView) view.findViewById(R.id.SubItemprice);
itemdesc = (TextView) view.findViewById(R.id.itemdesc);
SubItemdesc = (TextView) view.findViewById(R.id.SubItemdesc);
order = (ImageView) view.findViewById(R.id.order);
final JSONParser setdata = items.get(i);
basename.setText(setdata.getBaseName());
itemdesc.setText(setdata.getItemdesc());
SubItemdesc.setText(setdata.getSubItemdesc());
SubItemprice.setText(setdata.getSubItemprice());
order.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
itembasename = setdata.getBaseName();
itemde = setdata.getItemdesc();
subtmsub = setdata.getSubItemdesc();
subitempri = setdata.getSubItemprice();
Session userloggedin=new Session(context);
if (userloggedin.isLoggedIn()){
addcart();
Cart cart=new Cart();
cart.cartdata();
Toast.makeText(context, "LoggedIn" +itembasename+itemde+subtmsub+subitempri, Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(context,"Please Login", Toast.LENGTH_SHORT).show();
}
}
});
return view;
}
private void addcart() {
SharedPreferences customerid=context.getSharedPreferences("loginPrefs",Context.MODE_PRIVATE);
String customid=customerid.getString("customerid","");
String addcarturl = "http://standardtakeaway.co.uk/json/cart_process.php?userid="+customid+"&Item="+itembasename+itemde+subtmsub+"&Itemcount=1&price="+subitempri;
Log.d("Cart",addcarturl);
JsonArrayRequest cartreq=new JsonArrayRequest(Request.Method.POST, addcarturl, (String) null, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
for (int i=0;i<response.length();i++){
try {
JSONObject cartobj=response.getJSONObject(i);
String count=cartobj.getString("count");
loginPrefsEditor.putString("Badge",count);
loginPrefsEditor.commit();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(context,""+error, Toast.LENGTH_SHORT).show();
}
});
AppController.getInstance().addToRequestQueue(cartreq);
}
}
Cart.Class
public class Cart extends Fragment {
Button check_out;
TextView subtotal;
ListView cartview;
CartAdapter cartAdapter;
List<JSONParser> cartitems;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View cartfrag = inflater.inflate(R.layout.cart, container, false);
subtotal = (TextView) cartfrag.findViewById(R.id.subtotal);
cartview = (ListView) cartfrag.findViewById(R.id.cartview);
cartitems = new ArrayList<JSONParser>();
cartAdapter = new CartAdapter(getActivity(), cartitems);
cartview.setAdapter(cartAdapter);
check_out = (Button) cartfrag.findViewById(R.id.check_out);
check_out.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent cart_check = new Intent(getActivity(), Check.class);
startActivity(cart_check);
}
});
Session cartlogged=new Session(getActivity());
if (cartlogged.isLoggedIn()){
cartdata();
}else {
Toast.makeText(getActivity(),"Not Logged", Toast.LENGTH_SHORT).show();
}
cartdata();
return cartfrag;
}
void cartdata() {
SharedPreferences customerid=getActivity().getSharedPreferences("loginPrefs", Context.MODE_PRIVATE);
String customid=customerid.getString("customerid","");
String carturl = "http://standardtakeaway.co.uk/json/view_cart.php?userid=" + customid;
Log.d("CartData", carturl);
JsonObjectRequest cartreq = new JsonObjectRequest(Request.Method.GET, carturl, (String) null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray objarray = response.getJSONArray("items");
for (int i = 0; i < objarray.length(); i++) {
JSONObject cartdataobj = objarray.getJSONObject(i);
JSONParser parserdata = new JSONParser();
parserdata.setCartquantity(cartdataobj.getString("qty"));
parserdata.setCartbase(cartdataobj.getString("BaseName"));
parserdata.setCartprice(cartdataobj.getString("price"));
cartitems.add(parserdata);
}
JSONObject subobj=response.getJSONObject("details");
String subtext=subobj.getString("subtotal");
subtotal.setText(subtext);
} catch (JSONException e) {
e.printStackTrace();
}
cartAdapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), "" + error, Toast.LENGTH_SHORT).show();
}
});
cartreq.setRetryPolicy(new DefaultRetryPolicy(6000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
AppController.getInstance().addToRequestQueue(cartreq);
}
public static Cart getInstance(String message) {
Cart cart = new Cart();
Bundle bundle = new Bundle();
bundle.putString("MSG", message);
cart.setArguments(bundle);
return cart;
}
TabLayout.java
public class TabAdapter extends FragmentStatePagerAdapter {
private Context mContext;
private List<Fragment> mFragments = new ArrayList<>();
private List<String> mFragmentTitles = new ArrayList<>();
private List<Integer> mFragmentIcons = new ArrayList<>();
public TabAdapter(Context context, FragmentManager fm) {
super(fm);
this.mContext = context;
}
public void addFragment(Fragment fragment, String title, int drawable) {
mFragments.add(fragment);
mFragmentTitles.add(title);
mFragmentIcons.add(drawable);
}
#Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
#Override
public int getCount() {
return mFragments.size();
}
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitles.get(position);
}
public View getTabView(int position) {
View tab = LayoutInflater.from(mContext).inflate(R.layout.customtab, null);
TextView tabText = (TextView) tab.findViewById(R.id.tabText);
ImageView tabImage = (ImageView) tab.findViewById(R.id.tabImage);
tabText.setText(mFragmentTitles.get(position));
tabImage.setBackgroundResource(mFragmentIcons.get(position));
if (position == 0) {
tab.setSelected(true);
}
return tab;
}
}
MainActivity.java
public class MainActivity extends BaseActivity implements OnFragmentInteractionListener {
#Bind(R.id.tabpager)
ViewPager mViewpager;
#Bind(R.id.tab_layout)
TabLayout mTabs;
private TabAdapter pageAdapter;
String home,menu,cart,account,more;
#Override
protected int getLayoutResource() {
return R.layout.activity_main;
}
#Override
protected void initVariables(Bundle savedInstanceState) {
home= getString(R.string.home);
menu = getString(R.string.menu);
cart = getString(R.string.cart);
account = getString(R.string.account);
more = getString(R.string.more);
}
#Override
protected void initData(Bundle savedInstanceState) {
setupViewPager(mViewpager);
setupTabLayout(mTabs);
}
public void setupViewPager(ViewPager viewPager) {
pageAdapter = new TabAdapter(getApplicationContext(), getSupportFragmentManager());
pageAdapter.addFragment(MainFragment.getInstance(home), home, R.drawable.home);
pageAdapter.addFragment(MenuItems.getInstance(menu), menu, R.drawable.menu);
pageAdapter.addFragment(Cart.getInstance(cart), cart, R.drawable.cart);
pageAdapter.addFragment(Account.getInstance(account), account, R.drawable.account);
pageAdapter.addFragment(More.getInstance(more), more, R.drawable.more);
viewPager.setAdapter(pageAdapter);
}
public void setupTabLayout(TabLayout tabLayout) {
tabLayout.setTabMode(TabLayout.MODE_FIXED);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
tabLayout.setupWithViewPager(mViewpager);
mViewpager.setOffscreenPageLimit(4);
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
tab.setCustomView(pageAdapter.getTabView(i));
}
tabLayout.requestFocus();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

You can fix this way by setting setOnPageChangeListener on viewPager:
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
#Override
public void onPageSelected(int index) {
// TODO Auto-generated method stub
if(index==3){
((Cart) mAdapter.getItem(index)).cartdata();
}
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
#Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
Your cartdata() must be public.