Shuffle ArrayList

I have two RecyclerView and one ArrayList called collections, I'm trying to shuffling this ArrayList and get 12 items of it.

@Override

protected void onPostExecute(List<CollectionsModel> collections) {

    super.onPostExecute(collections);

    if (isAdded() && getActivity() != null) {

        setAdapterForRecyclerView(collections);

         setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

    }

}

Shuffle Method :

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    java.util.Collections.shuffle(collectionsModelList);

    return collectionsModelList;

}

Adapter Method for RecyclerView 1 :

private void setAdapterForRecyclerViewBestCollections(List<CollectionsModel> collectionHelper) {

    for (int i = 0; i < 12; i++) {

        arrayListCollections.add(collectionHelper.get(i));

    }

    /*rest of code*/

}

Adapter Method for RecyclerView 2 :

private void setAdapterForRecyclerView(final List<CollectionsModel> wlls) {

    if (myAdapter == null) {

        myAdapter = new MyAdapterCollection(wlls, getActivity(), new RecyclerViewClickListener() {

            @Override

            public void onClick(View view, Wallpaper wallpaper) {



            }



            @Override

            public void onClick(View view, CollectionsModel collectionsModel) {



            }

        }, R.layout.collection_item);

        recyclerView.setAdapter(myAdapter);

    } else {

        int position = myAdapter.getItemCount();

        myAdapter.getItems().addAll(wlls);

        myAdapter.notifyItemRangeInserted(position, position);

    }

}

My Issue :

When I run the app, I see RecyclerView 1 and RecyclerView 2 both of them randomized (With same order).

What I want :

I want to see random items order in RecyclerView 1 and normal order RecyclerView 2

edited Nov 19 '18 at 19:20

ETO

1,976422

asked Nov 19 '18 at 18:46

pic

204212

add a comment |

I have two RecyclerView and one ArrayList called collections, I'm trying to shuffling this ArrayList and get 12 items of it.

@Override

protected void onPostExecute(List<CollectionsModel> collections) {

    super.onPostExecute(collections);

    if (isAdded() && getActivity() != null) {

        setAdapterForRecyclerView(collections);

         setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

    }

}

Shuffle Method :

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    java.util.Collections.shuffle(collectionsModelList);

    return collectionsModelList;

}

Adapter Method for RecyclerView 1 :

private void setAdapterForRecyclerViewBestCollections(List<CollectionsModel> collectionHelper) {

    for (int i = 0; i < 12; i++) {

        arrayListCollections.add(collectionHelper.get(i));

    }

    /*rest of code*/

}

Adapter Method for RecyclerView 2 :

private void setAdapterForRecyclerView(final List<CollectionsModel> wlls) {

    if (myAdapter == null) {

        myAdapter = new MyAdapterCollection(wlls, getActivity(), new RecyclerViewClickListener() {

            @Override

            public void onClick(View view, Wallpaper wallpaper) {



            }



            @Override

            public void onClick(View view, CollectionsModel collectionsModel) {



            }

        }, R.layout.collection_item);

        recyclerView.setAdapter(myAdapter);

    } else {

        int position = myAdapter.getItemCount();

        myAdapter.getItems().addAll(wlls);

        myAdapter.notifyItemRangeInserted(position, position);

    }

}

My Issue :

When I run the app, I see RecyclerView 1 and RecyclerView 2 both of them randomized (With same order).

What I want :

I want to see random items order in RecyclerView 1 and normal order RecyclerView 2

edited Nov 19 '18 at 19:20

ETO

1,976422

asked Nov 19 '18 at 18:46

pic

204212

add a comment |

I have two RecyclerView and one ArrayList called collections, I'm trying to shuffling this ArrayList and get 12 items of it.

@Override

protected void onPostExecute(List<CollectionsModel> collections) {

    super.onPostExecute(collections);

    if (isAdded() && getActivity() != null) {

        setAdapterForRecyclerView(collections);

         setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

    }

}

Shuffle Method :

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    java.util.Collections.shuffle(collectionsModelList);

    return collectionsModelList;

}

Adapter Method for RecyclerView 1 :

private void setAdapterForRecyclerViewBestCollections(List<CollectionsModel> collectionHelper) {

    for (int i = 0; i < 12; i++) {

        arrayListCollections.add(collectionHelper.get(i));

    }

    /*rest of code*/

}

Adapter Method for RecyclerView 2 :

private void setAdapterForRecyclerView(final List<CollectionsModel> wlls) {

    if (myAdapter == null) {

        myAdapter = new MyAdapterCollection(wlls, getActivity(), new RecyclerViewClickListener() {

            @Override

            public void onClick(View view, Wallpaper wallpaper) {



            }



            @Override

            public void onClick(View view, CollectionsModel collectionsModel) {



            }

        }, R.layout.collection_item);

        recyclerView.setAdapter(myAdapter);

    } else {

        int position = myAdapter.getItemCount();

        myAdapter.getItems().addAll(wlls);

        myAdapter.notifyItemRangeInserted(position, position);

    }

}

My Issue :

When I run the app, I see RecyclerView 1 and RecyclerView 2 both of them randomized (With same order).

What I want :

I want to see random items order in RecyclerView 1 and normal order RecyclerView 2

edited Nov 19 '18 at 19:20

ETO

1,976422

asked Nov 19 '18 at 18:46

pic

204212

I have two RecyclerView and one ArrayList called collections, I'm trying to shuffling this ArrayList and get 12 items of it.

@Override

protected void onPostExecute(List<CollectionsModel> collections) {

    super.onPostExecute(collections);

    if (isAdded() && getActivity() != null) {

        setAdapterForRecyclerView(collections);

         setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

    }

}

Shuffle Method :

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    java.util.Collections.shuffle(collectionsModelList);

    return collectionsModelList;

}

Adapter Method for RecyclerView 1 :

private void setAdapterForRecyclerViewBestCollections(List<CollectionsModel> collectionHelper) {

    for (int i = 0; i < 12; i++) {

        arrayListCollections.add(collectionHelper.get(i));

    }

    /*rest of code*/

}

Adapter Method for RecyclerView 2 :

private void setAdapterForRecyclerView(final List<CollectionsModel> wlls) {

    if (myAdapter == null) {

        myAdapter = new MyAdapterCollection(wlls, getActivity(), new RecyclerViewClickListener() {

            @Override

            public void onClick(View view, Wallpaper wallpaper) {



            }



            @Override

            public void onClick(View view, CollectionsModel collectionsModel) {



            }

        }, R.layout.collection_item);

        recyclerView.setAdapter(myAdapter);

    } else {

        int position = myAdapter.getItemCount();

        myAdapter.getItems().addAll(wlls);

        myAdapter.notifyItemRangeInserted(position, position);

    }

}

My Issue :

When I run the app, I see RecyclerView 1 and RecyclerView 2 both of them randomized (With same order).

What I want :

I want to see random items order in RecyclerView 1 and normal order RecyclerView 2

java android collections android-recyclerview shuffle

edited Nov 19 '18 at 19:20

ETO

1,976422

asked Nov 19 '18 at 18:46

pic

204212

edited Nov 19 '18 at 19:20

ETO

1,976422

asked Nov 19 '18 at 18:46

pic

204212

edited Nov 19 '18 at 19:20

ETO

1,976422

edited Nov 19 '18 at 19:20

ETO

1,976422

edited Nov 19 '18 at 19:20

ETO

1,976422

asked Nov 19 '18 at 18:46

pic

204212

asked Nov 19 '18 at 18:46

pic

204212

asked Nov 19 '18 at 18:46

pic

204212

add a comment |

1 Answer
1

active

oldest

votes

First you are passing list object to setAdapterForRecyclerView(collections);

After that you are passing same list object to setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

And then shuffling the object (in both the methods you are using same object and shuffle will reflects to both RecyclerView1 and RecyclerView2

Create new List object and return that after shuffling, so that you will see two different order in RecyclerView1 and RecyclerView2

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    List<CollectionsModel> shuff = new ArrayList<>(collectionsModelList);

    java.util.Collections.shuffle(shuff);

    return shuff;

}

edited Nov 20 '18 at 4:22

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

First you are passing list object to setAdapterForRecyclerView(collections);

After that you are passing same list object to setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

And then shuffling the object (in both the methods you are using same object and shuffle will reflects to both RecyclerView1 and RecyclerView2

Create new List object and return that after shuffling, so that you will see two different order in RecyclerView1 and RecyclerView2

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    List<CollectionsModel> shuff = new ArrayList<>(collectionsModelList);

    java.util.Collections.shuffle(shuff);

    return shuff;

}

edited Nov 20 '18 at 4:22

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

add a comment |

First you are passing list object to setAdapterForRecyclerView(collections);

After that you are passing same list object to setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

And then shuffling the object (in both the methods you are using same object and shuffle will reflects to both RecyclerView1 and RecyclerView2

Create new List object and return that after shuffling, so that you will see two different order in RecyclerView1 and RecyclerView2

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    List<CollectionsModel> shuff = new ArrayList<>(collectionsModelList);

    java.util.Collections.shuffle(shuff);

    return shuff;

}

edited Nov 20 '18 at 4:22

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

add a comment |

First you are passing list object to setAdapterForRecyclerView(collections);

After that you are passing same list object to setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

And then shuffling the object (in both the methods you are using same object and shuffle will reflects to both RecyclerView1 and RecyclerView2

Create new List object and return that after shuffling, so that you will see two different order in RecyclerView1 and RecyclerView2

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    List<CollectionsModel> shuff = new ArrayList<>(collectionsModelList);

    java.util.Collections.shuffle(shuff);

    return shuff;

}

edited Nov 20 '18 at 4:22

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

First you are passing list object to setAdapterForRecyclerView(collections);

After that you are passing same list object to setAdapterForRecyclerViewBestCollections(shuffleCollection(collections));

And then shuffling the object (in both the methods you are using same object and shuffle will reflects to both RecyclerView1 and RecyclerView2

Create new List object and return that after shuffling, so that you will see two different order in RecyclerView1 and RecyclerView2

public List<CollectionsModel> shuffleCollection(List<CollectionsModel> collectionsModelList) {

    List<CollectionsModel> shuff = new ArrayList<>(collectionsModelList);

    java.util.Collections.shuffle(shuff);

    return shuff;

}

edited Nov 20 '18 at 4:22

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

edited Nov 20 '18 at 4:22

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

answered Nov 19 '18 at 18:51

Deadpool

4,4692326

add a comment |

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