Dfyjkt

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;