Nrthugu

I am trying to set an image of the button dynamically when the button is pressed. i am not able to do it as the page in view pager is not getting updated automatically. here is the code below. In the instantiateitem method i am trying to set an image based on click. It works for first time then i have to go back again and come back to get the updated view. I need to update it instantly. Please Help out

    public class ShowDetailsActivity extends AppCompatActivity {

        private List<Quote> modelList;

        private ViewPagerAdapter viewPagerAdapter;

        private ViewPager viewPager;

        private MyDataBase db;

        private Cursor quotes;

        ImageButton imgshare;

        TextView head;

        private static final String TAG = "ShowDetailsActivity";

        @Override

        protected void onCreate(Bundle savedInstanceState) {



            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_showdetails);

            head = findViewById(R.id.head);

            viewPager = findViewById(R.id.viewpager);

            modelList = new ArrayList<>();

            String category="";

            ArrayList<String> ar = new ArrayList<String>();

            ArrayList<String> ar_id = new ArrayList<String>();

            ArrayList<String> ar_category = new ArrayList<String>();

            ArrayList<String> ar_bookmark = new ArrayList<String>();

            db = new MyDataBase(this);

            if(getIntent().getExtras()!=null){

                category =getIntent().getExtras().getString("category");

                switch (category){

                    case "romance":

                        quotes = db.getQuotes("romance");

                        head.setText("Romantic");

                        break;

                    case "breakup":

                        quotes = db.getQuotes("breakup");

                        head.setText("Break Up");

                        break;

                    case "favorite":

                        quotes = db.allBookmarks();

                        head.setText("Bookmarks");

                        break;

                }

            }





            if(quotes!=null && quotes.moveToFirst()){

                do{



                    ar_id.add(quotes.getString(0));

                    ar.add(quotes.getString(1));

                    ar_bookmark.add(quotes.getString(2));

                    ar_category.add(quotes.getString(3));

                }while(quotes.moveToNext());

            }



            for (int i = 0 ; i < ar.size() ; i++)

            {

                Quote quote = new Quote();

                quote.setQuote(ar.get(i));

                quote.setCategory(ar_category.get(i));

                quote.setId(Integer.parseInt(ar_id.get(i)));

                quote.setBookmark(Integer.parseInt(ar_bookmark.get(i)));

                modelList.add(quote);

            }

            viewPagerAdapter = new ViewPagerAdapter(modelList,this);

            viewPagerAdapter.notifyDataSetChanged();

            viewPager.setAdapter(viewPagerAdapter);



            if(getIntent().getIntExtra("id",0) != -1)

            {



               Bundle extras = getIntent().getExtras();

               int pos = getIntent().getIntExtra("id",0);

                Log.d(TAG, "pos"+pos);

               viewPager.setCurrentItem(pos,true);

            }



        }

    }







public class ViewPagerAdapter extends PagerAdapter {



    private List<Quote> quotesList;

    private Context context;

    private static final String TAG = "ViewPagerAdapter";

    ImageButton imgshare,imgcopy,imgencshare,imgbookmark;

    private MyDataBase db;



    public ViewPagerAdapter(List<Quote> quotesList, Context context) {

        this.quotesList = quotesList;

        this.context = context;

    }





    @Override

    public int getCount() {

        return quotesList.size();

    }



    @Override

    public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {

        return view == (RelativeLayout) o;

    }



    @Override

    public Object instantiateItem(ViewGroup container, final int position) {

        Log.d(TAG, "saiinstantiateItem: ");

        LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);



        View view = layoutInflater.inflate(R.layout.viewpager_contents, container, false);

        //container is a viewgroup.





        TextView quotes = view.findViewById(R.id.quotes);

        quotes.setText(quotesList.get(position).getQuote());

        final String send = quotesList.get(position).getQuote();

        db = new MyDataBase(context);



        imgshare = (ImageButton) view.findViewById(R.id.btn_share);

        imgcopy= (ImageButton) view.findViewById(R.id.btn_copy_quote);

        imgencshare= (ImageButton) view.findViewById(R.id.btn_encrypt_and_share);

        imgbookmark = (ImageButton) view.findViewById(R.id.btn_favorite);



//        quotesList.get(position)



        Log.d(TAG, "instantiateItemQuote: "+quotesList.get(position).getBookmark());

        if(quotesList.get(position).getBookmark() == 1){

            Log.d(TAG, "instantiateItem: "+quotesList.get(position).getBookmark());

            imgbookmark.setImageResource(R.drawable.ic_favorite_red_24dp);

        }



        imgbookmark.setOnClickListener(new View.OnClickListener(){

            @Override

            public void onClick(View view) {

//                Log.d(TAG, "clicky"+quotesList.get(position).getId());

//                Log.d(TAG, "clickycat"+quotesList.get(position).getCategory());

                Log.d(TAG, "clickycat"+quotesList.get(position).getBookmark());

                if(quotesList.get(position).getBookmark() == 1) {

                 db.removeBookmark(quotesList.get(position).getCategory(),quotesList.get(position).getId());

                    imgbookmark.setImageResource(R.drawable.ic_favorite_black_24dp);

                    Toast.makeText(context, "Bookmark removed",

                            Toast.LENGTH_SHORT).show();



                }

                else {



                    db.addBookmark(quotesList.get(position).getCategory(), quotesList.get(position).getId());

                    imgbookmark.setImageResource(R.drawable.ic_favorite_red_24dp);

                    Toast.makeText(context, "Bookmarked",

                            Toast.LENGTH_SHORT).show();



            }









            }

        });



        imgencshare.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                String password = "password";

                try {

                    String encryptedMsg = AESCrypt.encrypt(password, send);

                    Intent sendIntent = new Intent();

                    sendIntent.setAction(Intent.ACTION_SEND);

                    sendIntent.putExtra(Intent.EXTRA_TEXT, encryptedMsg);

                    sendIntent.setType("text/plain");

                    view.getContext().startActivity(Intent.createChooser(sendIntent,"choose app"));



                } catch (GeneralSecurityException e) {

                    //handle error

                }

            }

        });

        imgcopy.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                String copytext;

                copytext = send;



                ClipboardManager clipboard = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);

                ClipData clip = ClipData.newPlainText(null, send);

                if (clipboard == null) return;

                clipboard.setPrimaryClip(clip);

                Toast.makeText(context, "Text Copied",

                        Toast.LENGTH_SHORT).show();

            }

        });





        imgshare.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Intent sendIntent = new Intent();

                sendIntent.setAction(Intent.ACTION_SEND);

                sendIntent.putExtra(Intent.EXTRA_TEXT, send);

                sendIntent.setType("text/plain");

                view.getContext().startActivity(Intent.createChooser(sendIntent,"choose app"));

            }

        });

        container.addView(view);

        return view;

    }



    @Override

    public void destroyItem(ViewGroup container, int position, Object object) {

        container.removeView((View) object);

    }



    public int getItemPosition(Object object) {

        return POSITION_NONE;

    }



}