Load all items in android RecyclerView at once
I'm too tired for searched this question in two day's , but i got false answer , I implement RecyclerView and it worked well, but my RecycleView have many items like photo's and video's like Instagram . it mean my adapter will invoke onBindViewHolder for all items to start download and loading image's and video's . but RecycleView just invoked onBindViewHolder for each item's when item is visible (scroll show it) . it's impossible ? if not how instagram can do that . pay attention : i don't want to using database for save image's and video's
@Override
public void onBindViewHolder(RecyclerView.ViewHolder h, int position) {
Log.e("position",position+" ");
thread t = new Thread(new Runnable(){
public void run(){
Bitmap bitmap = downloadPhoto();//it mean photo downloaded and converted to Bitmap
runOnUiThread(new Runnable(){
holder.imageView.setImageBitmap(bitmap);
));
}
});
t.start();
}
android android-recyclerview asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
add a comment |
I'm too tired for searched this question in two day's , but i got false answer , I implement RecyclerView and it worked well, but my RecycleView have many items like photo's and video's like Instagram . it mean my adapter will invoke onBindViewHolder for all items to start download and loading image's and video's . but RecycleView just invoked onBindViewHolder for each item's when item is visible (scroll show it) . it's impossible ? if not how instagram can do that . pay attention : i don't want to using database for save image's and video's
@Override
public void onBindViewHolder(RecyclerView.ViewHolder h, int position) {
Log.e("position",position+" ");
thread t = new Thread(new Runnable(){
public void run(){
Bitmap bitmap = downloadPhoto();//it mean photo downloaded and converted to Bitmap
runOnUiThread(new Runnable(){
holder.imageView.setImageBitmap(bitmap);
));
}
});
t.start();
}
asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
Use Glide. bumptech.github.io/glide/int/recyclerview.html
– Sourav Bagchi
Nov 14 '17 at 15:42
Post your implementation ofonBindViewHolderand whatever method/AsyncTask/whatever you are using to load media. I need to see exactly how you are loading the images and videos before I can help you.
– Leo Aso
Nov 14 '17 at 15:47
@Leo thank's for your help . question edited
– b4hr4m
Nov 14 '17 at 15:55
DoesdownloadPhototake any arguments? Like a URL?
– Leo Aso
Nov 14 '17 at 15:58
yeah . downloadPhoto() is downloded any photo from internet (url) . in fact i got delay in download photo's
– b4hr4m
Nov 14 '17 at 15:59
add a comment |
I'm too tired for searched this question in two day's , but i got false answer , I implement RecyclerView and it worked well, but my RecycleView have many items like photo's and video's like Instagram . it mean my adapter will invoke onBindViewHolder for all items to start download and loading image's and video's . but RecycleView just invoked onBindViewHolder for each item's when item is visible (scroll show it) . it's impossible ? if not how instagram can do that . pay attention : i don't want to using database for save image's and video's
@Override
public void onBindViewHolder(RecyclerView.ViewHolder h, int position) {
Log.e("position",position+" ");
thread t = new Thread(new Runnable(){
public void run(){
Bitmap bitmap = downloadPhoto();//it mean photo downloaded and converted to Bitmap
runOnUiThread(new Runnable(){
holder.imageView.setImageBitmap(bitmap);
));
}
});
t.start();
}
asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
I'm too tired for searched this question in two day's , but i got false answer , I implement RecyclerView and it worked well, but my RecycleView have many items like photo's and video's like Instagram . it mean my adapter will invoke onBindViewHolder for all items to start download and loading image's and video's . but RecycleView just invoked onBindViewHolder for each item's when item is visible (scroll show it) . it's impossible ? if not how instagram can do that . pay attention : i don't want to using database for save image's and video's
@Override
public void onBindViewHolder(RecyclerView.ViewHolder h, int position) {
Log.e("position",position+" ");
thread t = new Thread(new Runnable(){
public void run(){
Bitmap bitmap = downloadPhoto();//it mean photo downloaded and converted to Bitmap
runOnUiThread(new Runnable(){
holder.imageView.setImageBitmap(bitmap);
));
}
});
t.start();
}
asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
edited Nov 14 '17 at 16:01
b4hr4m
asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
asked Nov 14 '17 at 15:38
b4hr4mb4hr4m
276520
276520
Use Glide. bumptech.github.io/glide/int/recyclerview.html
– Sourav Bagchi
Nov 14 '17 at 15:42
Post your implementation ofonBindViewHolderand whatever method/AsyncTask/whatever you are using to load media. I need to see exactly how you are loading the images and videos before I can help you.
– Leo Aso
Nov 14 '17 at 15:47
@Leo thank's for your help . question edited
– b4hr4m
Nov 14 '17 at 15:55
DoesdownloadPhototake any arguments? Like a URL?
– Leo Aso
Nov 14 '17 at 15:58
yeah . downloadPhoto() is downloded any photo from internet (url) . in fact i got delay in download photo's
– b4hr4m
Nov 14 '17 at 15:59
add a comment |
Use Glide. bumptech.github.io/glide/int/recyclerview.html
– Sourav Bagchi
Nov 14 '17 at 15:42
Post your implementation ofonBindViewHolderand whatever method/AsyncTask/whatever you are using to load media. I need to see exactly how you are loading the images and videos before I can help you.
– Leo Aso
Nov 14 '17 at 15:47
@Leo thank's for your help . question edited
– b4hr4m
Nov 14 '17 at 15:55
DoesdownloadPhototake any arguments? Like a URL?
– Leo Aso
Nov 14 '17 at 15:58
yeah . downloadPhoto() is downloded any photo from internet (url) . in fact i got delay in download photo's
– b4hr4m
Nov 14 '17 at 15:59
Use Glide. bumptech.github.io/glide/int/recyclerview.html
– Sourav Bagchi
Nov 14 '17 at 15:42
Use Glide. bumptech.github.io/glide/int/recyclerview.html
– Sourav Bagchi
Nov 14 '17 at 15:42
Post your implementation of
onBindViewHolder and whatever method/AsyncTask/whatever you are using to load media. I need to see exactly how you are loading the images and videos before I can help you.– Leo Aso
Nov 14 '17 at 15:47
Post your implementation of
onBindViewHolder and whatever method/AsyncTask/whatever you are using to load media. I need to see exactly how you are loading the images and videos before I can help you.– Leo Aso
Nov 14 '17 at 15:47
@Leo thank's for your help . question edited
– b4hr4m
Nov 14 '17 at 15:55
@Leo thank's for your help . question edited
– b4hr4m
Nov 14 '17 at 15:55
Does
downloadPhoto take any arguments? Like a URL?– Leo Aso
Nov 14 '17 at 15:58
Does
downloadPhoto take any arguments? Like a URL?– Leo Aso
Nov 14 '17 at 15:58
yeah . downloadPhoto() is downloded any photo from internet (url) . in fact i got delay in download photo's
– b4hr4m
Nov 14 '17 at 15:59
yeah . downloadPhoto() is downloded any photo from internet (url) . in fact i got delay in download photo's
– b4hr4m
Nov 14 '17 at 15:59
add a comment |
2 Answers
2
active
oldest
votes
As you describe, you only want to load photos when the item is visible. In fact RecyclerView adapter will only invoke onBindViewHolder when the item appears(visible) so you can start download photos then update UI when photo ready for you. And you now do not load all item's photo at once, you just load when you need.
ps: If the item's photo url is known, you can use Glide or Picasso library.
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
yeah i know this . it mean it's not possible to invoke onBindViewHolde for all items (visible or invisible) at once ?
– b4hr4m
Nov 14 '17 at 16:06
You can load at once but it should be avoided because bitmap costs many memory.
– CoXier
Nov 14 '17 at 16:07
i know this warning . can you tell me how can load all at once ?
– b4hr4m
Nov 14 '17 at 16:08
1
Are you sure to load all photos to memory?If so, you can load all photos when construct the adapter.
– CoXier
Nov 14 '17 at 16:10
it mean we can not invoke onBind for invisible item's . thank you :)
– b4hr4m
Nov 14 '17 at 16:11
add a comment |
Although I wouldn't recommend you to use this "solution", since it destroys the original purpose of using a RecyclerView, it is possible to let the RecyclerView invoke onBindViewHolder for every item at once. For it to work, just set the RecyclerView inside a NestedScrollView.
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
As you describe, you only want to load photos when the item is visible. In fact RecyclerView adapter will only invoke onBindViewHolder when the item appears(visible) so you can start download photos then update UI when photo ready for you. And you now do not load all item's photo at once, you just load when you need.
ps: If the item's photo url is known, you can use Glide or Picasso library.
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
yeah i know this . it mean it's not possible to invoke onBindViewHolde for all items (visible or invisible) at once ?
– b4hr4m
Nov 14 '17 at 16:06
You can load at once but it should be avoided because bitmap costs many memory.
– CoXier
Nov 14 '17 at 16:07
i know this warning . can you tell me how can load all at once ?
– b4hr4m
Nov 14 '17 at 16:08
1
Are you sure to load all photos to memory?If so, you can load all photos when construct the adapter.
– CoXier
Nov 14 '17 at 16:10
it mean we can not invoke onBind for invisible item's . thank you :)
– b4hr4m
Nov 14 '17 at 16:11
add a comment |
As you describe, you only want to load photos when the item is visible. In fact RecyclerView adapter will only invoke onBindViewHolder when the item appears(visible) so you can start download photos then update UI when photo ready for you. And you now do not load all item's photo at once, you just load when you need.
ps: If the item's photo url is known, you can use Glide or Picasso library.
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
yeah i know this . it mean it's not possible to invoke onBindViewHolde for all items (visible or invisible) at once ?
– b4hr4m
Nov 14 '17 at 16:06
You can load at once but it should be avoided because bitmap costs many memory.
– CoXier
Nov 14 '17 at 16:07
i know this warning . can you tell me how can load all at once ?
– b4hr4m
Nov 14 '17 at 16:08
1
Are you sure to load all photos to memory?If so, you can load all photos when construct the adapter.
– CoXier
Nov 14 '17 at 16:10
it mean we can not invoke onBind for invisible item's . thank you :)
– b4hr4m
Nov 14 '17 at 16:11
add a comment |
As you describe, you only want to load photos when the item is visible. In fact RecyclerView adapter will only invoke onBindViewHolder when the item appears(visible) so you can start download photos then update UI when photo ready for you. And you now do not load all item's photo at once, you just load when you need.
ps: If the item's photo url is known, you can use Glide or Picasso library.
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
As you describe, you only want to load photos when the item is visible. In fact RecyclerView adapter will only invoke onBindViewHolder when the item appears(visible) so you can start download photos then update UI when photo ready for you. And you now do not load all item's photo at once, you just load when you need.
ps: If the item's photo url is known, you can use Glide or Picasso library.
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
edited Nov 14 '17 at 16:06
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
answered Nov 14 '17 at 16:03
CoXierCoXier
6771629
6771629
yeah i know this . it mean it's not possible to invoke onBindViewHolde for all items (visible or invisible) at once ?
– b4hr4m
Nov 14 '17 at 16:06
You can load at once but it should be avoided because bitmap costs many memory.
– CoXier
Nov 14 '17 at 16:07
i know this warning . can you tell me how can load all at once ?
– b4hr4m
Nov 14 '17 at 16:08
1
Are you sure to load all photos to memory?If so, you can load all photos when construct the adapter.
– CoXier
Nov 14 '17 at 16:10
it mean we can not invoke onBind for invisible item's . thank you :)
– b4hr4m
Nov 14 '17 at 16:11
add a comment |
yeah i know this . it mean it's not possible to invoke onBindViewHolde for all items (visible or invisible) at once ?
– b4hr4m
Nov 14 '17 at 16:06
You can load at once but it should be avoided because bitmap costs many memory.
– CoXier
Nov 14 '17 at 16:07
i know this warning . can you tell me how can load all at once ?
– b4hr4m
Nov 14 '17 at 16:08
1
Are you sure to load all photos to memory?If so, you can load all photos when construct the adapter.
– CoXier
Nov 14 '17 at 16:10
it mean we can not invoke onBind for invisible item's . thank you :)
– b4hr4m
Nov 14 '17 at 16:11
yeah i know this . it mean it's not possible to invoke onBindViewHolde for all items (visible or invisible) at once ?
– b4hr4m
Nov 14 '17 at 16:06
yeah i know this . it mean it's not possible to invoke onBindViewHolde for all items (visible or invisible) at once ?
– b4hr4m
Nov 14 '17 at 16:06
You can load at once but it should be avoided because bitmap costs many memory.
– CoXier
Nov 14 '17 at 16:07
You can load at once but it should be avoided because bitmap costs many memory.
– CoXier
Nov 14 '17 at 16:07
i know this warning . can you tell me how can load all at once ?
– b4hr4m
Nov 14 '17 at 16:08
i know this warning . can you tell me how can load all at once ?
– b4hr4m
Nov 14 '17 at 16:08
1
1
Are you sure to load all photos to memory?If so, you can load all photos when construct the adapter.
– CoXier
Nov 14 '17 at 16:10
Are you sure to load all photos to memory?If so, you can load all photos when construct the adapter.
– CoXier
Nov 14 '17 at 16:10
it mean we can not invoke onBind for invisible item's . thank you :)
– b4hr4m
Nov 14 '17 at 16:11
it mean we can not invoke onBind for invisible item's . thank you :)
– b4hr4m
Nov 14 '17 at 16:11
add a comment |
Although I wouldn't recommend you to use this "solution", since it destroys the original purpose of using a RecyclerView, it is possible to let the RecyclerView invoke onBindViewHolder for every item at once. For it to work, just set the RecyclerView inside a NestedScrollView.
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
add a comment |
Although I wouldn't recommend you to use this "solution", since it destroys the original purpose of using a RecyclerView, it is possible to let the RecyclerView invoke onBindViewHolder for every item at once. For it to work, just set the RecyclerView inside a NestedScrollView.
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
add a comment |
Although I wouldn't recommend you to use this "solution", since it destroys the original purpose of using a RecyclerView, it is possible to let the RecyclerView invoke onBindViewHolder for every item at once. For it to work, just set the RecyclerView inside a NestedScrollView.
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
Although I wouldn't recommend you to use this "solution", since it destroys the original purpose of using a RecyclerView, it is possible to let the RecyclerView invoke onBindViewHolder for every item at once. For it to work, just set the RecyclerView inside a NestedScrollView.
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
answered Nov 21 '18 at 16:59
Philipp PoropatPhilipp Poropat
11
11
add a comment |
add a comment |
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Use Glide. bumptech.github.io/glide/int/recyclerview.html
– Sourav Bagchi
Nov 14 '17 at 15:42
Post your implementation of
onBindViewHolderand whatever method/AsyncTask/whatever you are using to load media. I need to see exactly how you are loading the images and videos before I can help you.– Leo Aso
Nov 14 '17 at 15:47
@Leo thank's for your help . question edited
– b4hr4m
Nov 14 '17 at 15:55
Does
downloadPhototake any arguments? Like a URL?– Leo Aso
Nov 14 '17 at 15:58
yeah . downloadPhoto() is downloded any photo from internet (url) . in fact i got delay in download photo's
– b4hr4m
Nov 14 '17 at 15:59