How To Pass Or Send Data From Recyclerview Adapter To Fragment

How to pass data from recyclerview adapter to fragment and what i have to write the code in fragment to receive data.I have already check the links in this website but unfortunatel

Solution 1:

You can pass data by attaching a callback into your adapter:

Create an interface:

interfaceOnTextClickListener {
    voidonTextClick(ExampleItem data);
}

Delegate the callback:

classExampleAdapterextendsRecyclerView.Adapter<ExampleAdapter.ExampleViewHolder> {

    List<ExampleItem> items;
    OnTextClickListener listener;

    ExampleAdapter(List<ExampleItem> items, OnTextClickListener listener) {
        this.items = items;
        this.listener = listener;
    }

    @OverridepublicvoidonBindViewHolder(ExampleViewHolder viewHolder, int position) {
        viewHolder.textView.setOnClickListener(newView.OnClickListener() {
            @OverridepublicvoidonClick(View v) {
                // Say you want to pass an ExampleItem back to the fragment...ExampleItemdata= items.get(position);
                listener.onTextClick(data);
            }
        });
    }
}

Implement the fragment with the interface:

classYourFragmentextendsFragmentimplementsOnTextClickListener {

    publiconViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        recyclerView.setAdapter(newExampleAdapter(this));
    }

    voidonTextClick(ExampleItem data) {
        // Now you can do however you want with the data here...Toast.makeText(getActivity(), "Got: " + data, Toast.LENGTH_SHORT).show()
    }
}

Solution 2:

You have two options;

Using SharedPreferences:

ContextmyContext= exampleViewHolder.itemView.getContext()

SharedPreferences.Editoreditor= getSharedPreferences("DeviceToken", MODE_PRIVATE).edit();
editor.putString("YourKeyNameHere", currentItem.getmText()); // or add toString() after if needed
editor.apply();

_{To get:}

SharedPreferencesprefs= getSharedPreferences("DeviceToken", MODE_PRIVATE);
StringdeviceToken= prefs.getString("YourKeyNameHere", null); // get it here

Using Intent: (If you want to start the another Activity when you pass the data)

Intent intent = new Intent(myContext , SignoutActivity.class);
intent.putExtra("EXTRA_TEXT", currentItem.getmText());
startActivity(intent); // if needed, add myContext before starting myContext.startActivity...

_{To get:}

StringextraText= getIntent().getStringExtra("EXTRA_TEXT");

Solution 3:

You have "ClickListener" in fragment.

for example.

@OverridepublicvoidonResume(){
    super.onResume();
    ((ExampleAdapter) mAdapter).onItemClick(newRecyclerViewItemClick() {
        @OverridepublicvoidonItemClick(int position, View v) {
            //to do. ArrayList<> data.get(position).getYourItem();
        }
    });
}

And you must create interface RecyclerViewItemClick.java

publicinterfaceRecyclerViewItemClick {
    publicvoidonItemClick(int position, View v);
}

Last. ExampleAdapter.java add

publicvoidonItemClick(RecyclerViewItemClick mclick){
   this.myClickListener = mclick;
}

ExampleViewHolder method add in

@Override
public void onClick(View v) {
    myClickListener.onItemClick(getAdapterPosition(), v);
    notifyDataSetChanged();
}

I hope you solve this problem. Thank.

Solution 4:

Have a IDataCollector interface. Implement her in the Fragment, pass the Fragment reference as a constructor parameter, and use it inside the adapter

publicinterface IDataCollector {
    voidsetText(String text);
    voidsetAnything(Object anything);
}

// FragmentpublicclassFragmentimplements IDataCollector {

    privatevoidinitView() {
        // Add this as a parameterExampleAdapter adapter = newExampleAdapter(... , this);
    }

    @OverridepublicvoidsetText(String text){
        this.textField = text;
    }

    @OverridepublicvoidsetText(Object anything){
        this.anything = anything;
    }
}

// Adapter code// Constructor, parameters ommitedpublicExampleAdapter(...., IDataCollector dataCollector) {
    this.dataCollector = dataCollector;
}

@OverridepublicvoidonBindViewHolder(@NonNull ExampleViewHolder exampleViewHolder, int i) {
    final ExampleItem currentItem=mExampleList.get(i);
    exampleViewHolder.mTextView.setText(currentItem.getmText());
    exampleViewHolder.mTextView.setOnClickListener(newView.OnClickListener() {
        @OverridepublicvoidonClick(View v) {
            dataCollector.setText(((TextView)v.findViewById(R.id.label1)).getText());
            ....
        }
    });
}

Solution 5:

Through Interface you can solve this 1. create an Interface in adapter , add required methods 2. call those methods in adapter wherever required 3. implement the interface in fragment or activity, pass a context to the adapter