| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.car.ui.preference; |
| |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.RadioButton; |
| |
| import androidx.recyclerview.widget.RecyclerView; |
| |
| import com.android.car.ui.R; |
| |
| import java.util.List; |
| |
| /** |
| * The adapter for the recyclerview containing radio buttons as the items. |
| */ |
| public class CarUiRecyclerViewRadioButtonAdapter extends |
| RecyclerView.Adapter<CarUiRecyclerViewRadioButtonAdapter.ViewHolder> { |
| |
| /** |
| * Callback that will be issued after any radio button is clicked. |
| */ |
| public interface OnRadioButtonClickedListener { |
| /** |
| * Will be called when radio button is clicked. |
| * |
| * @param position of the radio button. |
| */ |
| void onClick(int position); |
| } |
| |
| private OnRadioButtonClickedListener mOnRadioButtonClickedListener; |
| |
| private final List<String> mList; |
| private int mSelectedPosition = -1; |
| |
| public CarUiRecyclerViewRadioButtonAdapter(List<String> list, int position) { |
| mList = list; |
| mSelectedPosition = position; |
| } |
| |
| @Override |
| public CarUiRecyclerViewRadioButtonAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, |
| int viewType) { |
| View view = LayoutInflater.from(parent.getContext()) |
| .inflate(R.layout.car_ui_radio_button_item, parent, false); |
| return new CarUiRecyclerViewRadioButtonAdapter.ViewHolder(view); |
| } |
| |
| @Override |
| public void onBindViewHolder(CarUiRecyclerViewRadioButtonAdapter.ViewHolder holder, |
| int position) { |
| String entry = mList.get(position); |
| //since only one radio button is allowed to be selected, |
| // this condition un-checks previous selections |
| holder.mRadioButton.setChecked(mSelectedPosition == position); |
| holder.mRadioButton.setText(entry); |
| } |
| |
| @Override |
| public int getItemCount() { |
| return mList.size(); |
| } |
| |
| /** Registers a new {@link OnRadioButtonClickedListener} listener. */ |
| public void registerListener(OnRadioButtonClickedListener listener) { |
| mOnRadioButtonClickedListener = listener; |
| } |
| |
| /** Unregisters a {@link OnRadioButtonClickedListener} listener\. */ |
| public void unregisterOnBackListener(OnRadioButtonClickedListener listener) { |
| mOnRadioButtonClickedListener = null; |
| } |
| |
| /** The viewholder class for recyclerview containing radio buttons. */ |
| public class ViewHolder extends RecyclerView.ViewHolder { |
| |
| public RadioButton mRadioButton; |
| |
| public ViewHolder(View view) { |
| super(view); |
| mRadioButton = (RadioButton) view.findViewById(R.id.radio_button); |
| |
| mRadioButton.setOnClickListener(v -> { |
| mSelectedPosition = getAdapterPosition(); |
| notifyDataSetChanged(); |
| if (mOnRadioButtonClickedListener != null) { |
| mOnRadioButtonClickedListener.onClick(mSelectedPosition); |
| } |
| }); |
| } |
| } |
| } |