Lazy Loading no funciona correctamente

Estoy mostrando una lista de contactos en una revista de reciclaje. Estoy mostrando imágenes de perfil de contacto, primero estoy cargando estas imágenes desde el servidor y luego almacenar estas imágenes en una memoria externa.

Luego Carga de las imágenes desde el almacenamiento externo. Puedo ver las imágenes cargadas, pero como me desplazo puedo ver algunas imágenes durante un segundo o dos, entonces desaparecen y puedo ver el icono de la imagen por defecto.

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public class ContactAdapter extends RecyclerView.Adapter<ContactAdapter.ContactHolder> { private List<Contact> contactList; File myDir1; private Activity mContext; private Boolean fileExists; private File file; private static final int MY_PERMISSIONS_REQUEST_CALL= 20; public ContactAdapter(Activity context, List<Contact> contactList) { this.contactList = contactList; this.mContext = context; } @Override public ContactHolder onCreateViewHolder(ViewGroup viewGroup, int i) { View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_layout,null); ContactHolder mh = new ContactHolder(v); return mh; } @Override public void onBindViewHolder(final ContactHolder contactHolder, int i) { final Contact contact = contactList.get(i); // Log.e("Imagename",""+"http://xesoftwares.co.in/contactsapi/profile_images/85368a5bbd6cffba8a3aa202a80563a2.jpg");//+feedItem.getThumbnail()); Target target = new Target() { @Override public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) { // your code here ... bitmap = Bitmap.createScaledBitmap(bitmap,(int)(bitmap.getWidth()*0.8), (int)(bitmap.getHeight()*0.8), true); contactHolder.thumbnail.setImageBitmap(bitmap); Log.e("ProfileImage", contact.getmProfileImage()); SaveImages(bitmap, contact.getmProfileImage()); } @Override public void onBitmapFailed(Drawable errorDrawable) { contactHolder.thumbnail.setImageDrawable(errorDrawable); // do error handling as required } @Override public void onPrepareLoad(Drawable placeHolderDrawable) { contactHolder.thumbnail.setImageDrawable(placeHolderDrawable); } }; contactHolder.thumbnail.setTag(target); String url = ServiceUrl.getBaseUrl() + ServiceUrl.getImageUserUrl() + contact.getmProfileImage(); Log.e("url",url); if(contact.getmProfileImage().equals("")) { file = new File(""); fileExists = file.exists(); contactHolder.thumbnail.setImageDrawable(ContextCompat.getDrawable(mContext, R.drawable.ic_account_circle_black_48dp)); } else { file = new File(Environment.getExternalStorageDirectory() + "/ContactProfileImages/" + contact.getmProfileImage()); fileExists = file.exists(); } if(fileExists) { Log.e("fileExists",file.getAbsolutePath()); BitmapFactory.Options bmOptions = new BitmapFactory.Options(); Bitmap bitmap = BitmapFactory.decodeFile(file.getPath(), bmOptions); contactHolder.thumbnail.setImageBitmap(bitmap); } else { Log.e("Picasso",file.getAbsolutePath()); Picasso.with(mContext).load(url) .error(R.drawable.ic_account_circle_black_24dp) .placeholder(R.drawable.ic_account_circle_black_24dp) .into(target); } contactHolder.title.setText(contact.getmUserName()); //feedListRowHolder.genre.setText(Html.fromHtml(feedItem.getGenre())); } @Override public int getItemCount() { return (null != contactList ? contactList.size() : 0); } public void SaveImages(Bitmap bitmap,String profileName) { try { String root = Environment.getExternalStorageDirectory().getPath(); File myDir = new File(root +"/ContactProfileImages"); if (!myDir.exists()) { myDir.mkdirs(); } // String name = new Date().toString();= String name = profileName; File myDir1 = new File(myDir, name); if(!myDir1.exists()) { FileOutputStream out = new FileOutputStream(myDir1); bitmap.compress(Bitmap.CompressFormat.PNG,100,out); out.flush(); out.close(); } } catch(Exception e){ // some action } //myDir1= imageFilePath1.getprofile(); } public class ContactHolder extends RecyclerView.ViewHolder implements View.OnClickListener { protected CircleImageView thumbnail; protected TextView title; public ContactHolder(View view) { super(view); this.thumbnail = (CircleImageView) view.findViewById(R.id.thumbnail); this.title = (TextView) view.findViewById(R.id.title); view.setOnClickListener(this); } @Override public void onClick(View v) { final Contact contact = contactList.get(getAdapterPosition()); final Dialog dialog = new Dialog(mContext); dialog.setCanceledOnTouchOutside(true); dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); dialog.setContentView(R.layout.custom); final Window window = dialog.getWindow(); WindowManager.LayoutParams wlp =window.getAttributes(); wlp.gravity = Gravity.CENTER_HORIZONTAL|Gravity.TOP; wlp.y=320; window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT)); window.setAttributes(wlp); // set the custom dialog components - text, image and button TextView txtusername = (TextView) dialog.findViewById(R.id.txtusername); TextView txtmobile = (TextView) dialog.findViewById(R.id.txtmobile); TextView txtemail = (TextView) dialog.findViewById(R.id.txtemail); txtusername.setText(contact.getmUserName()); txtemail.setText(contact.getmEmailId()); txtmobile.setText(contact.getmMobileNo()); SquareImageView image = (SquareImageView) dialog.findViewById(R.id.image); ImageView image1 = (ImageView) dialog.findViewById(R.id.image1); ImageView image2 = (ImageView) dialog.findViewById(R.id.image2); ImageView image3 = (ImageView) dialog.findViewById(R.id.image3); if(contact.getmProfileImage().equals("")) { image.setImageDrawable(ContextCompat.getDrawable(mContext,R.drawable.profile_icon)); } else { File file = new File(Environment.getExternalStorageDirectory() + "/ContactProfileImages/" + contact.getmProfileImage()); BitmapFactory.Options bmOptions = new BitmapFactory.Options(); Bitmap bitmap = BitmapFactory.decodeFile(file.getPath(), bmOptions); image.setImageBitmap(bitmap); } image1.setImageResource(R.drawable.ic_call_black_24dp); image2.setImageResource(R.drawable.ic_textsms_black_24dp); image3.setImageResource(R.drawable.ic_email_black_24dp); image2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Uri sms_uri = Uri.parse("smsto:" + contact.getmMobileNo()); Intent sms_intent = new Intent(Intent.ACTION_SENDTO, sms_uri); mContext.startActivity(sms_intent); dialog.dismiss(); } }); image1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:" + contact.getmMobileNo())); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); mContext.startActivity(intent); dialog.dismiss(); } }); image3.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent email = new Intent(Intent.ACTION_SEND); email.putExtra(Intent.EXTRA_EMAIL, new String[]{contact.getmEmailId()}); email.setType("message/rfc822"); mContext.startActivity(Intent.createChooser(email, "Choose an Email client :")); } }); Button dialogButton = (Button) dialog.findViewById(R.id.dialogButtonOK); // if button is clicked, view all information custom dialog dialogButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { ((MainActivity)mContext).finish(); Intent intent = new Intent(mContext,DetailViewActivity.class); intent.putExtra("contact",contact); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK); intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION); mContext.startActivity(intent); dialog.dismiss(); } }); dialog.show(); } } } 

EDIT: Busqué el mismo problema con la biblioteca picasso, cuando cargamos imágenes desde el servidor, por esto conseguí la solución de SO como:

  recyclerView.setHasFixedSize(true); recyclerView.setItemViewCacheSize(20); recyclerView.setDrawingCacheEnabled(true); recyclerView.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH); 

Y esto funcionó cuando estoy cargando las imágenes desde el servidor, pero cuando estoy cargando las imágenes desde el almacenamiento externo todavía el problema existe.

¿Puede alguien ayudar con esto, por favor? Gracias..

 @Override public void onBindViewHolder(final ContactHolder contactHolder, int i) { final Contact contact = contactList.get(i); // Log.e("Imagename",""+"http://xesoftwares.co.in/contactsapi/profile_images/85368a5bbd6cffba8a3aa202a80563a2.jpg");//+feedItem.getThumbnail()); String url = ServiceUrl.getBaseUrl() + ServiceUrl.getImageUserUrl() + contact.getmProfileImage(); Log.e("url",url); if(contact.getmProfileImage().equals("")) { file = new File(""); fileExists = file.exists(); contactHolder.thumbnail.setImageDrawable(ContextCompat.getDrawable(mContext, R.drawable.ic_account_circle_black_48dp)); } else { file = new File(Environment.getExternalStorageDirectory() + "/ContactProfileImages/" + contact.getmProfileImage()); fileExists = file.exists(); } Log.e("Picasso",file.getAbsolutePath()); Picasso.with(mContext).load(url) .error(R.drawable.ic_account_circle_black_24dp) .placeholder(R.drawable.ic_account_circle_black_24dp) .into(contactHolder.thumbnail); contactHolder.title.setText(contact.getmUserName()); //feedListRowHolder.genre.setText(Html.fromHtml(feedItem.getGenre())); } 

  final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024); // Use 1/8th of the available memory for this memory cache. final int cacheSize = maxMemory / 8; Picasso.Builder builder = new Picasso.Builder(getApplicationContext()); builder.memoryCache(new LruCache(cacheSize)); Picasso built = builder.build(); built.setIndicatorsEnabled(true);// it will show indicator where it downloaded from built.setLoggingEnabled(false); Picasso.setSingletonInstance(built); 

  Picasso.with(mContext).load(url) .error(R.drawable.on_error) .placeholder(R.drawable.place_holder) //.resize(custom_width,custom_height) put custom_height to 0 if you want to maintain aspect ratio .into(your_view); 

 @Override public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) { // your code here ... Contact c = contactList.get(contactHolder.getAdapterPosition()); bitmap = Bitmap.createScaledBitmap(bitmap,(int)(bitmap.getWidth()*0.8), (int)(bitmap.getHeight()*0.8), true); contactHolder.thumbnail.setImageBitmap(bitmap); Log.e("ProfileImage", c.getmProfileImage()); SaveImages(bitmap, c.getmProfileImage()); } 

  private void startCropImage() { Intent intent = new Intent(this, CropImage.class); intent.putExtra(CropImage.IMAGE_PATH, mFileTemp.getPath()); intent.putExtra(CropImage.SCALE, true); intent.putExtra(CropImage.ASPECT_X, 0); //3 for aspect ratio intent.putExtra(CropImage.ASPECT_Y, 0); //2 for aspect ratio startActivityForResult(intent, REQUEST_CODE_CROP_IMAGE); }