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嗯，我有一個應用程序管理聯繫人，我用2 RecyclerView顯示未選中和選定的聯繫人。用戶可以選擇和取消選擇聯繫人。通知*方法不更新RecyclerView的視圖
這裏是我的情況：
我有這兩個RecyclerView，一個用於管理選定的聯繫人和其他用於managin未選擇聯繫人。當用戶從未被選擇的列表中選擇一個聯繫人時，該聯繫人將從該列表中刪除並插入到所選列表中。如果用戶從所選列表中選擇一個聯繫人，只會將聯繫人從所選列表中刪除並插入未選中列表中，同樣的情況也會發生。我有一個自定義的RadioButton已實施，並且在onCheckedChanged事件中，我選擇或取消選擇時將適當的適配器中的聯繫人刪除。
我有選擇的列表（SelectedContactsAdapter），另一個未選擇列表（UnselectedContactsAdapter）一個適配器。我使用新的SortedList集合來管理適配器的數據，並在SortedList的回調中通知適配器所做的更改併發送回調消息來更新其他適配器。
例如，如果用戶選擇在未選擇列表中的聯繫人，在onCheckedChanged事件我之前保存的接觸從適配器中（我這樣做是因爲我需要它傳遞給回調，因此可以插入另一個適配器中），然後從適配器中刪除該聯繫人。這觸發SortedList的onRemoved方法，在那裏我呼叫notifyItemRemoved(position)（position指示被刪除的聯繫人的位置）以及將該聯繫人插入到選定列表中的回調。
由於某些原因，通知*方法不會更新RecyclerView視圖。我試過notifyDataSetChanged，它可以工作，但它不適合我，因爲我需要更新快速，幾乎是瞬間的。
我有2 RecyclerView的發起與FastScroll setNestedScrollingEnabled(false)。以防萬一......
這裏是我的代碼：
public abstract class FilterableContactsAdapter extends RecyclerView.Adapter<FilterableContactsAdapter.ContactViewHolder>
implements Filterable {
//... Some variables like the filter
protected Contact mLastContactTouched;
protected SortedList<Contact> mFilteredContacts;
protected ContactCallback mContactCallback;
protected boolean mPropagate;
public FilterableContactsAdapter() {
mPropagate = true;
mFilteredContacts = new SortedList<>(Contact.class, new SortedList.Callback<Contact>() {
@Override
public int compare(Contact o1, Contact o2) {
return o1.getName().compareToIgnoreCase(o2.getName());
}
@Override
public void onChanged(int position, int count) {
notifyItemChanged(position);
if(mContactCallback != null && mPropagate) mContactCallback.onContactChanged(mLastContactTouched, position);
}
@Override
public boolean areContentsTheSame(Contact oldItem, Contact newItem) {
boolean sameIds = (oldItem.getId() == newItem.getId());
boolean sameNames = oldItem.getName().equals(newItem.getName());
boolean samePhoneNumbers = oldItem.getNormalizedPhoneNumber().equals(newItem.getNormalizedPhoneNumber());
if(sameIds && sameNames && samePhoneNumbers) return true;
else return false;
}
@Override
public boolean areItemsTheSame(Contact item1, Contact item2) {
return item1.getId() == item2.getId();
}
@Override
public void onInserted(int position, int count) {
notifyItemInserted(position);
/*if(FilterableContactsAdapter.this instanceof SelectedContactsAdapter) notifyDataSetChanged();
else notifyItemInserted(position);*/
if(mContactCallback != null && mPropagate) mContactCallback.onContactInserted(mLastContactTouched, position);
}
@Override
public void onRemoved(int position, int count) {
notifyItemRemoved(position);
/*if(FilterableContactsAdapter.this instanceof SelectedContactsAdapter) notifyDataSetChanged();
else notifyItemRemoved(position);*/
if(mContactCallback != null && mPropagate) mContactCallback.onContactRemoved(mLastContactTouched, position);
}
@Override
public void onMoved(int fromPosition, int toPosition) {
notifyItemMoved(fromPosition, toPosition);
if(mContactCallback != null && mPropagate) mContactCallback.onContactMoved(mLastContactTouched, fromPosition, toPosition);
}
});
}
public void add(Contact contact) {
mFilteredContacts.add(contact);
}
public void remove(Contact contact) {
mFilteredContacts.remove(contact);
}
//... Some other methods like onCreateViewHolder, the ContactViewHolder declaration and the filter implementation
}
public interface ContactCallback {
void onContactInserted(Contact contact, int adapterPosition);
void onContactRemoved(Contact contact, int adapterPosition);
void onContactMoved(Contact contact, int from, int to);
void onContactChanged(Contact contact, int adapterPosition);
}
public class SelectedContactsAdapter extends FilterableContactsAdapter {
@Override
public void onBindViewHolder(final ContactViewHolder holder, final int position) {
final Contact contact = mFilteredContacts.get(position);
if(contact != null) {
holder.parentLayout.setVisibility(View.VISIBLE);
holder.nameTV.setText(contact.getName());
holder.phoneNumberTV.setText(contact.getNormalizedPhoneNumber());
holder.selectCB.setSafeCheck(true, SafeCheckBox.IGNORE);
holder.selectCB.setOnSafeCheckedListener(new SafeCheckBox.OnSafeCheckedListener() {
@Override
public void onAlwaysCalledListener(CompoundButton buttonView, boolean isChecked) {
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
contact.setSelected(isChecked);
mLastContactTouched = contact;
remove(contact);
}
});
} else {
holder.parentLayout.setVisibility(View.GONE);
}
}
}
public class UnselectedContactsAdapter extends FilterableContactsAdapter {
@Override
public void onBindViewHolder(final ContactViewHolder holder, final int position) {
final Contact contact = mFilteredContacts.get(position);
if(!contact.isSelected()) {
holder.parentLayout.setVisibility(View.VISIBLE);
holder.nameTV.setText(contact.getName());
holder.phoneNumberTV.setText(contact.getNormalizedPhoneNumber());
holder.selectCB.setSafeCheck(false, SafeCheckBox.IGNORE);
holder.selectCB.setOnSafeCheckedListener(new SafeCheckBox.OnSafeCheckedListener() {
@Override
public void onAlwaysCalledListener(CompoundButton buttonView, boolean isChecked) {
}
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
contact.setSelected(isChecked);
mLastContactTouched = contact;
remove(contact);
}
});
} else {
holder.parentLayout.setVisibility(View.GONE);
}
}
}
public class ContactsActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// init the views and setup the searchbar
setupMultiContactsPicker();
}
//... Some other stuff like an OnClick implementation and
//other utility methods that only manage visibility of some
//components of the UI like 2 TextViews and a ProgressBar
private void setupMultiContactsPicker() {
final Filter.FilterListener filterListener = new Filter.FilterListener() {
@Override
public void onFilterComplete(int count) {
progressBar.setVisibility(View.GONE);
updateLayout();
}
};
unselectedContactsAdapter = new UnselectedContactsAdapter();
unselectedContactsAdapter.setContactCallback(new ContactCallback() {
@Override
public void onContactInserted(Contact contact, int adapterPosition) {
selectedContactsAdapter.setPropagate(false);
if(selectedContactsAdapter.getItemCount() > 0) selectedContactsAdapter.remove(contact);
selectedContactsAdapter.setPropagate(true);
updateLayout();
}
@Override
public void onContactRemoved(Contact contact, int adapterPosition) {
selectedContactsAdapter.setPropagate(false);
selectedContactsAdapter.add(contact);
selectedContactsAdapter.setPropagate(true);
updateLayout();
}
@Override
public void onContactMoved(Contact contact, int from, int to) {
}
@Override
public void onContactChanged(Contact contact, int adapterPosition) {
}
});
unselectedContacsRV.setVisibility(View.VISIBLE);
LinearLayoutManager uLayoutManager = new LinearLayoutManager(ContactsActivity.this, LinearLayoutManager.VERTICAL, false);
unselectedContacsRV.setLayoutManager(uLayoutManager);
unselectedContacsRV.setAdapter(unselectedContactsAdapter);
unselectedContacsRV.setHasFixedSize(true);
// Initisialize the adapter with the correct contacts (ContactsFilter.UNSELECTED)
unselectedContactsAdapter.getFilter().filter(FilterableContactsAdapter.ContactsFilter.UNSELECTED, new Filter.FilterListener() {
@Override
public void onFilterComplete(int count) {
onLoadFinish(); //This method call updateLayout(); when the 2 filters finish to load data into the adapters.
}
});
selectedContactsAdapter = new SelectedContactsAdapter();
selectedContactsAdapter.setContactCallback(new ContactCallback() {
@Override
public void onContactInserted(Contact contact, int adapterPosition) {
unselectedContactsAdapter.setPropagate(false);
if(unselectedContactsAdapter.getItemCount() > 0) unselectedContactsAdapter.remove(contact);
unselectedContactsAdapter.setPropagate(true);
updateLayout(); // This method show or hide some TextViews that I use as section titles, nothing more
}
@Override
public void onContactRemoved(Contact contact, int adapterPosition) {
unselectedContactsAdapter.setPropagate(false);
unselectedContactsAdapter.add(contact);
unselectedContactsAdapter.setPropagate(true);
updateLayout(); // This method show or hide some TextViews that I use as section titles, nothing more
}
@Override
public void onContactMoved(Contact contact, int from, int to) {
}
@Override
public void onContactChanged(Contact contact, int adapterPosition) {
}
});
LinearLayoutManager sLayoutManager = new LinearLayoutManager(ContactsActivity.this, LinearLayoutManager.VERTICAL, false);
selectedContacsRV.setLayoutManager(sLayoutManager);
selectedContacsRV.setAdapter(selectedContactsAdapter);
selectedContacsRV.setHasFixedSize(true);
// Initisialize the adapter with the correct contacts (ContactsFilter.SELECTED)
selectedContactsAdapter.getFilter().filter(FilterableContactsAdapter.ContactsFilter.SELECTED, new Filter.FilterListener() {
@Override
public void onFilterComplete(int count) {
onLoadFinish();
}
});
}
}
下面是我在說什麼的一些照片：我在這裏選擇
一個聯繫人：
我有兩個觸點選擇在這裏（「祖母通」和「阿黛拉薩帕塔」）：
而在這裏，在左邊，我都未被選擇我的第一個項目（聯繫人「Abuela」）。右邊是所有聯繫人列表中取消選擇：
