我有一个片段，它会使Recyclerview膨胀并使用适配器填充它。现在布局有一个Checkbox项目。我没有在onBindViewHolder的Adapter中处理Checkbox Item click事件，而是想在实现setOnCheckedChangeListener的Fragment类中处理它。
是否可以将选中的更改事件委托给Fragment？
这是代码 -
填充Cardview的适配器类
public class CardTypesAdapter extends RecyclerView.Adapter<CardTypesAdapter.ViewHolder> {
private int[] arrCardID;
private String[] arrCardType;
private String[] arrCardSummary;
private Listener listener;
ArrayList<String> selectedStrings = new ArrayList<String>();
public static interface Listener {
public void onClick(int position);
}
public static class ViewHolder extends RecyclerView.ViewHolder {
private CardView cv;
public ViewHolder(CardView v) {
super(v);
cv = v;
}
}
public CardTypesAdapter(int[] arrCardID, String[] arrCardType, String[] arrCardSummary) {
this.arrCardID = arrCardID;
this.arrCardType = arrCardType;
this.arrCardSummary = arrCardSummary;
}
public void setListener(Listener listener) {
this.listener = listener;
}
@Override
public CardTypesAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
CardView cv = (CardView) LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_types, parent, false);
return new ViewHolder(cv);
}
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
//Log.d("position in bindview", ""+ position);
CardView cv = holder.cv;
final CheckBox chbCardSelect = (CheckBox) cv.findViewById(R.id.chbCardSelect);
chbCardSelect.setId(arrCardID[position]);
chbCardSelect.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
selectedStrings.add("" + chbCardSelect.getId());
} else {
selectedStrings.remove("" + chbCardSelect.getId());
}
Log.d("Selected Id" , ""+chbCardSelect.getId());
}
});
chbCardSelect.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//onCheckedChanged(buttonView, isChecked);
if (isChecked) {
selectedStrings.add("" + chbCardSelect.getId());
} else {
selectedStrings.remove("" + chbCardSelect.getId());
}
Log.d("Selected Id" , ""+chbCardSelect.getId());
}
});
TextView txtCardName = (TextView) cv.findViewById(R.id.txtCardName);
txtCardName.setText(arrCardType[position]);
TextView txtCardSummary = (TextView) cv.findViewById(R.id.txtCardSummary);
txtCardSummary.setText(arrCardSummary[position]);
cv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("in ClickListener", "i am clicked");
if (listener != null) {
Log.d("in ClickListener", "i am clicked");
listener.onClick(position);
}
}
});
}
@Override
public int getItemCount() {
return arrCardType.length;
}
}
DialogFragment Class，我计划收到Checkbox Click事件
public class CardsTypeFragment extends DialogFragment implements View.OnClickListener{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragment_card_types, container, false);
//Recyclerview code
final RecyclerView cardtypeRecycler = (RecyclerView) view.findViewById(R.id.cards_types_recycler);
Button btnApplyFilter=(Button) view.findViewById(R.id.btnApplyFilter);
btnApplyFilter.setOnClickListener(this);
int[] arrCardID=new int[clsCardTypes.arrCardTypes.length];
String[] arrCardType = new String[clsCardTypes.arrCardTypes.length];
String[] arrCardSummary = new String[clsCardTypes.arrCardTypes.length];
for (int i = 0; i < arrCardType.length; i++) {
arrCardID[i] = clsCardTypes.arrCardTypes[i].getIntCardID();
arrCardType[i] = clsCardTypes.arrCardTypes[i].getStrCardType();
arrCardSummary[i] = clsCardTypes.arrCardTypes[i].getStrCardSummary();
}
CardTypesAdapter adapter = new CardTypesAdapter(arrCardID, arrCardType, arrCardSummary);
cardtypeRecycler.setAdapter(adapter);
LinearLayoutManager layoutManager = new LinearLayoutManager(this.getActivity(), LinearLayoutManager.VERTICAL,false);
cardtypeRecycler.setLayoutManager(layoutManager);
adapter.setListener(new CardTypesAdapter.Listener() {
public void onClick(int position) {
Log.d("in ClickListener", "i am clicked");
}
});
return view;
}
@Override
public void onClick(View view){
if(view.getId()==R.id.btnApplyFilter){
Intent i=new Intent()
.putExtra("name", "Amit Pandey")
.putExtra("age", "36");
getTargetFragment().onActivityResult(getTargetRequestCode(), Activity.RESULT_OK, i);//getActivity().getIntent()
dismiss();
}
}
}
答案 0 :(得分：0)
Fragment和Activity之间有很多沟通的例子。但Adapters和Fragment之间很少。
我在适配器中声明了一个接口 -
app.controller('otherController', ['$scope', 'breadcrumb', function($scope, breadcrumb) {
// update company
breadcrumb.setCompany('StackExchange');
// update the scope data in the view?
}]);
在我的片段类中实现它 -
public interface FragmentCommunicator{
public void passDataToFragment(String someValue);
}
将其传递给适配器 -
public class CardsTypeFragment extends DialogFragment implements View.OnClickListener, CardTypesAdapter.FragmentCommunicator
在适配器内 -
CardTypesAdapter adapter = new CardTypesAdapter(arrCardID, arrCardType, arrCardSummary, this);
和onCheckedChangeListener
public CardTypesAdapter(int[] arrCardID, String[] arrCardType, String[] arrCardSummary, FragmentCommunicator fragmentCommunicator) {
this.arrCardID = arrCardID;
this.arrCardType = arrCardType;
this.arrCardSummary = arrCardSummary;
this.fragmentCommunicator=fragmentCommunicator;
}