car-ui-lib/paintbooth/src/main/java/com/android/car/ui/paintbooth/widescreenime/WideScreenImeActivity.java - platform/packages/apps/Car/libs - Git at Google

 /*
  * Copyright (C) 2020 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.paintbooth.widescreenime;

 import static android.view.inputmethod.EditorInfo.IME_FLAG_NO_EXTRACT_UI;

 import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.ADD_DESC_TITLE_TO_CONTENT_AREA;
 import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.ADD_DESC_TO_CONTENT_AREA;
 import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.ADD_ERROR_DESC_TO_INPUT_AREA;
 import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.REQUEST_RENDER_CONTENT_AREA;
 import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.WIDE_SCREEN_ACTION;
 import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.WIDE_SCREEN_EXTRACTED_TEXT_ICON_RES_ID;

 import android.content.Context;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnFocusChangeListener;
 import android.view.ViewGroup;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.Switch;
 import android.widget.Toast;

 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.recyclerview.widget.RecyclerView;

 import com.android.car.ui.baselayout.Insets;
 import com.android.car.ui.baselayout.InsetsChangedListener;
 import com.android.car.ui.core.CarUi;
 import com.android.car.ui.imewidescreen.CarUiImeSearchListItem;
 import com.android.car.ui.paintbooth.R;
 import com.android.car.ui.recyclerview.CarUiContentListItem;
 import com.android.car.ui.recyclerview.CarUiRecyclerView;
 import com.android.car.ui.toolbar.MenuItem;
 import com.android.car.ui.toolbar.Toolbar;
 import com.android.car.ui.toolbar.Toolbar.State;
 import com.android.car.ui.toolbar.ToolbarController;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;

 /**
  * Activity that shows different scenarios for wide screen ime.
  */
 public class WideScreenImeActivity extends AppCompatActivity implements InsetsChangedListener {

     private static final String TAG = "WideScreenImeActivity";

     private final List<MenuItem> mMenuItems = new ArrayList<>();
     private final List<ListElement> mWidescreenItems = new ArrayList<>();

     private final ArrayList<String> mItemIdList = new ArrayList<>();
     private final ArrayList<String> mTitleList = new ArrayList<>();
     private final ArrayList<String> mSubTitleList = new ArrayList<>();
     private final ArrayList<Integer> mPrimaryImageResId = new ArrayList<>();
     private final ArrayList<String> mSecondaryItemId = new ArrayList<>();
     private final ArrayList<Integer> mSecondaryImageResId = new ArrayList<>();
     private final List<CarUiImeSearchListItem> mSearchItems = new ArrayList<>();

     private InputMethodManager mInputMethodManager;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.car_ui_recycler_view_activity);

         mInputMethodManager = (InputMethodManager)
                 getSystemService(Context.INPUT_METHOD_SERVICE);

         ToolbarController toolbar = CarUi.getToolbar(this);
         toolbar.setTitle(getTitle());
         toolbar.setState(Toolbar.State.SUBPAGE);
         toolbar.setLogo(R.drawable.ic_launcher);
         toolbar.registerOnBackListener(
                 () -> {
                     if (toolbar.getState() == Toolbar.State.SEARCH
                             || toolbar.getState() == Toolbar.State.EDIT) {
                         toolbar.setState(Toolbar.State.SUBPAGE);
                         return true;
                     }
                     return false;
                 });

         CarUiContentListItem.OnClickListener mainClickListener = i ->
                 Toast.makeText(this, "Item clicked! " + i.getTitle(), Toast.LENGTH_SHORT).show();
         CarUiContentListItem.OnClickListener secondaryClickListener = i ->
                 Toast.makeText(this, "Item's secondary action clicked!", Toast.LENGTH_SHORT).show();

         Drawable icon = getDrawable(R.drawable.ic_launcher);

         for (int i = 1; i <= 100; i++) {
             CarUiImeSearchListItem item = new CarUiImeSearchListItem(
                     CarUiContentListItem.Action.ICON);
             item.setTitle("Title " + i);
             item.setBody("Sub title " + i);
             item.setIcon(icon);
             item.setSupplementalIcon(icon, secondaryClickListener);
             item.setOnItemClickedListener(mainClickListener);

             mSearchItems.add(item);
         }

         AtomicBoolean showResultsInView = new AtomicBoolean(false);

         mMenuItems.add(MenuItem.builder(this)
                 .setToSearch()
                 .setOnClickListener(i -> {
                     toolbar.setState(State.SEARCH);
                     if (showResultsInView.get() && toolbar.canShowSearchResultsView()) {
                         LayoutInflater inflater = LayoutInflater.from(this);
                         View contentArea = inflater.inflate(R.layout.ime_wide_screen_dummy_view,
                                 null, true);
                         contentArea.findViewById(R.id.button_1).setOnClickListener(v ->
                                 Toast.makeText(this, "Button 1 clicked", Toast.LENGTH_SHORT).show()
                         );

                         contentArea.findViewById(R.id.button_2).setOnClickListener(v -> {
                                     Toast.makeText(this, "Clearing the view...",
                                             Toast.LENGTH_SHORT).show();
                                     toolbar.setSearchResultsView(null);
                                 }
                         );
                         toolbar.setSearchResultsView(contentArea);
                     } else if (toolbar.canShowSearchResultItems()) {
                         toolbar.setSearchResultsView(null);
                         toolbar.setSearchResultItems(mSearchItems);
                     }
                 })
                 .build());

         toolbar.setMenuItems(mMenuItems);

         mWidescreenItems.add(new ButtonElement("Show custom search view", v -> {
             Switch swtch = (Switch) v;
             showResultsInView.set(swtch.isChecked());
         }));

         mWidescreenItems.add(new EditTextElement("Default Input Edit Text field", null));
         mWidescreenItems.add(
                 new EditTextElement("Add Desc to content area", this::addDescToContentArea));
         mWidescreenItems.add(new EditTextElement("Hide the content area", this::hideContentArea));
         mWidescreenItems.add(new EditTextElement("Hide extraction view", this::hideExtractionView));

         for (int i = 0; i < 7; i++) {
             mItemIdList.add("itemId" + i);
             mTitleList.add("Title " + i);
             mSubTitleList.add("subtitle " + i);
             mPrimaryImageResId.add(R.drawable.ic_launcher);
             mSecondaryItemId.add("imageId" + i);
             mSecondaryImageResId.add(R.drawable.ic_launcher);
         }

         mWidescreenItems.add(
                 new EditTextElement("Add icon to extracted view", this::addIconToExtractedView));
         mWidescreenItems.add(new EditTextElement("Add error message to content area",
                 this::addErrorDescToContentArea));

         CarUiRecyclerView recyclerView = requireViewById(R.id.list);
         recyclerView.setAdapter(mAdapter);
     }

     private void addIconToExtractedView(View view, boolean hasFocus) {
         if (!hasFocus) {
             return;
         }

         Bundle bundle = new Bundle();
         bundle.putInt(WIDE_SCREEN_EXTRACTED_TEXT_ICON_RES_ID, R.drawable.car_ui_icon_edit);
         mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
     }

     private void addErrorDescToContentArea(View view, boolean hasFocus) {
         if (!hasFocus) {
             return;
         }

         Bundle bundle = new Bundle();
         bundle.putString(ADD_ERROR_DESC_TO_INPUT_AREA, "Some error message");
         bundle.putString(ADD_DESC_TITLE_TO_CONTENT_AREA, "Title");
         bundle.putString(ADD_DESC_TO_CONTENT_AREA, "Description provided by the application");
         mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
     }

     private void hideExtractionView(View view, boolean hasFocus) {
         if (!hasFocus) {
             return;
         }

         EditText editText = (EditText) view;
         editText.setImeOptions(IME_FLAG_NO_EXTRACT_UI);

         Bundle bundle = new Bundle();
         bundle.putBoolean(REQUEST_RENDER_CONTENT_AREA, false);
         mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
     }

     private void addDescToContentArea(View view, boolean hasFocus) {
         if (!hasFocus) {
             return;
         }

         Bundle bundle = new Bundle();
         bundle.putString(ADD_DESC_TITLE_TO_CONTENT_AREA, "Title");
         bundle.putString(ADD_DESC_TO_CONTENT_AREA, "Description provided by the application");
         mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
     }

     private void hideContentArea(View view, boolean hasFocus) {
         if (!hasFocus) {
             return;
         }

         Bundle bundle = new Bundle();
         bundle.putBoolean(REQUEST_RENDER_CONTENT_AREA, false);
         mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
     }


     private abstract static class ViewHolder extends RecyclerView.ViewHolder {

         ViewHolder(@NonNull View itemView) {
             super(itemView);
         }

         public abstract void bind(ListElement element);
     }

     private static class EditTextViewHolder extends ViewHolder {
         private final EditText mEditText;

         EditTextViewHolder(@NonNull View itemView) {
             super(itemView);
             mEditText = itemView.requireViewById(R.id.edit_text);
         }

         @Override
         public void bind(ListElement e) {
             if (!(e instanceof EditTextElement)) {
                 throw new IllegalArgumentException("Expected an EditTextElement");
             }
             EditTextElement element = (EditTextElement) e;
             mEditText.setText(element.getText());
             mEditText.setOnFocusChangeListener(element.getOnFocusChangeListener());
         }
     }

     private static class ButtonViewHolder extends ViewHolder {
         private final Switch mSwitch;

         ButtonViewHolder(@NonNull View itemView) {
             super(itemView);
             mSwitch = itemView.requireViewById(R.id.button);
         }

         @Override
         public void bind(ListElement e) {
             if (!(e instanceof ButtonElement)) {
                 throw new IllegalArgumentException("Expected an ButtonElement");
             }
             ButtonElement element = (ButtonElement) e;
             mSwitch.setText(element.getText());
             mSwitch.setOnClickListener(element.getOnClickListener());
             mSwitch.setChecked(false);
         }
     }

     private final RecyclerView.Adapter<ViewHolder> mAdapter =
             new RecyclerView.Adapter<ViewHolder>() {
                 @Override
                 public int getItemCount() {
                     return mWidescreenItems.size();
                 }

                 @Override
                 public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                     LayoutInflater inflater = LayoutInflater.from(parent.getContext());
                     if (viewType == ListElement.TYPE_EDIT_TEXT) {
                         return new EditTextViewHolder(
                                 inflater.inflate(R.layout.edit_text_list_item, parent, false));
                     } else if (viewType == ListElement.TYPE_BUTTON) {
                         return new ButtonViewHolder(
                                 inflater.inflate(R.layout.list_item_switch, parent, false));
                     } else {
                         throw new IllegalArgumentException("Unknown viewType: " + viewType);
                     }
                 }

                 @Override
                 public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
                     holder.bind(mWidescreenItems.get(position));
                 }

                 @Override
                 public int getItemViewType(int position) {
                     return mWidescreenItems.get(position).getType();
                 }
             };

     @Override
     public void onCarUiInsetsChanged(@NonNull Insets insets) {
         requireViewById(R.id.list)
                 .setPadding(0, insets.getTop(), 0, insets.getBottom());
         requireViewById(android.R.id.content)
                 .setPadding(insets.getLeft(), 0, insets.getRight(), 0);
     }

     private abstract static class ListElement {
         static final int TYPE_EDIT_TEXT = 0;
         static final int TYPE_BUTTON = 1;

         private final String mText;

         ListElement(String text) {
             mText = text;
         }

         String getText() {
             return mText;
         }

         abstract int getType();
     }

     private static class EditTextElement extends ListElement {
         private OnFocusChangeListener mListener;

         EditTextElement(String text, OnFocusChangeListener listener) {
             super(text);
             mListener = listener;
         }

         OnFocusChangeListener getOnFocusChangeListener() {
             return mListener;
         }

         @Override
         int getType() {
             return TYPE_EDIT_TEXT;
         }
     }

     private static class ButtonElement extends ListElement {
         private OnClickListener mOnClickListener;

         ButtonElement(String text, OnClickListener listener) {
             super(text);
             mOnClickListener = listener;
         }

         public OnClickListener getOnClickListener() {
             return mOnClickListener;
         }

         @Override
         int getType() {
             return TYPE_BUTTON;
         }
     }
 }
	/*
	* Copyright (C) 2020 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.paintbooth.widescreenime;

	import static android.view.inputmethod.EditorInfo.IME_FLAG_NO_EXTRACT_UI;

	import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.ADD_DESC_TITLE_TO_CONTENT_AREA;
	import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.ADD_DESC_TO_CONTENT_AREA;
	import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.ADD_ERROR_DESC_TO_INPUT_AREA;
	import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.REQUEST_RENDER_CONTENT_AREA;
	import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.WIDE_SCREEN_ACTION;
	import static com.android.car.ui.imewidescreen.CarUiImeWideScreenController.WIDE_SCREEN_EXTRACTED_TEXT_ICON_RES_ID;

	import android.content.Context;
	import android.graphics.drawable.Drawable;
	import android.os.Bundle;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.View.OnClickListener;
	import android.view.View.OnFocusChangeListener;
	import android.view.ViewGroup;
	import android.view.inputmethod.InputMethodManager;
	import android.widget.EditText;
	import android.widget.Switch;
	import android.widget.Toast;

	import androidx.annotation.NonNull;
	import androidx.appcompat.app.AppCompatActivity;
	import androidx.recyclerview.widget.RecyclerView;

	import com.android.car.ui.baselayout.Insets;
	import com.android.car.ui.baselayout.InsetsChangedListener;
	import com.android.car.ui.core.CarUi;
	import com.android.car.ui.imewidescreen.CarUiImeSearchListItem;
	import com.android.car.ui.paintbooth.R;
	import com.android.car.ui.recyclerview.CarUiContentListItem;
	import com.android.car.ui.recyclerview.CarUiRecyclerView;
	import com.android.car.ui.toolbar.MenuItem;
	import com.android.car.ui.toolbar.Toolbar;
	import com.android.car.ui.toolbar.Toolbar.State;
	import com.android.car.ui.toolbar.ToolbarController;

	import java.util.ArrayList;
	import java.util.List;
	import java.util.concurrent.atomic.AtomicBoolean;

	/**
	* Activity that shows different scenarios for wide screen ime.
	*/
	public class WideScreenImeActivity extends AppCompatActivity implements InsetsChangedListener {

	private static final String TAG = "WideScreenImeActivity";

	private final List<MenuItem> mMenuItems = new ArrayList<>();
	private final List<ListElement> mWidescreenItems = new ArrayList<>();

	private final ArrayList<String> mItemIdList = new ArrayList<>();
	private final ArrayList<String> mTitleList = new ArrayList<>();
	private final ArrayList<String> mSubTitleList = new ArrayList<>();
	private final ArrayList<Integer> mPrimaryImageResId = new ArrayList<>();
	private final ArrayList<String> mSecondaryItemId = new ArrayList<>();
	private final ArrayList<Integer> mSecondaryImageResId = new ArrayList<>();
	private final List<CarUiImeSearchListItem> mSearchItems = new ArrayList<>();

	private InputMethodManager mInputMethodManager;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.car_ui_recycler_view_activity);

	mInputMethodManager = (InputMethodManager)
	getSystemService(Context.INPUT_METHOD_SERVICE);

	ToolbarController toolbar = CarUi.getToolbar(this);
	toolbar.setTitle(getTitle());
	toolbar.setState(Toolbar.State.SUBPAGE);
	toolbar.setLogo(R.drawable.ic_launcher);
	toolbar.registerOnBackListener(
	() -> {
	if (toolbar.getState() == Toolbar.State.SEARCH
	\|\| toolbar.getState() == Toolbar.State.EDIT) {
	toolbar.setState(Toolbar.State.SUBPAGE);
	return true;
	}
	return false;
	});

	CarUiContentListItem.OnClickListener mainClickListener = i ->
	Toast.makeText(this, "Item clicked! " + i.getTitle(), Toast.LENGTH_SHORT).show();
	CarUiContentListItem.OnClickListener secondaryClickListener = i ->
	Toast.makeText(this, "Item's secondary action clicked!", Toast.LENGTH_SHORT).show();

	Drawable icon = getDrawable(R.drawable.ic_launcher);

	for (int i = 1; i <= 100; i++) {
	CarUiImeSearchListItem item = new CarUiImeSearchListItem(
	CarUiContentListItem.Action.ICON);
	item.setTitle("Title " + i);
	item.setBody("Sub title " + i);
	item.setIcon(icon);
	item.setSupplementalIcon(icon, secondaryClickListener);
	item.setOnItemClickedListener(mainClickListener);

	mSearchItems.add(item);
	}

	AtomicBoolean showResultsInView = new AtomicBoolean(false);

	mMenuItems.add(MenuItem.builder(this)
	.setToSearch()
	.setOnClickListener(i -> {
	toolbar.setState(State.SEARCH);
	if (showResultsInView.get() && toolbar.canShowSearchResultsView()) {
	LayoutInflater inflater = LayoutInflater.from(this);
	View contentArea = inflater.inflate(R.layout.ime_wide_screen_dummy_view,
	null, true);
	contentArea.findViewById(R.id.button_1).setOnClickListener(v ->
	Toast.makeText(this, "Button 1 clicked", Toast.LENGTH_SHORT).show()
	);

	contentArea.findViewById(R.id.button_2).setOnClickListener(v -> {
	Toast.makeText(this, "Clearing the view...",
	Toast.LENGTH_SHORT).show();
	toolbar.setSearchResultsView(null);
	}
	);
	toolbar.setSearchResultsView(contentArea);
	} else if (toolbar.canShowSearchResultItems()) {
	toolbar.setSearchResultsView(null);
	toolbar.setSearchResultItems(mSearchItems);
	}
	})
	.build());

	toolbar.setMenuItems(mMenuItems);

	mWidescreenItems.add(new ButtonElement("Show custom search view", v -> {
	Switch swtch = (Switch) v;
	showResultsInView.set(swtch.isChecked());
	}));

	mWidescreenItems.add(new EditTextElement("Default Input Edit Text field", null));
	mWidescreenItems.add(
	new EditTextElement("Add Desc to content area", this::addDescToContentArea));
	mWidescreenItems.add(new EditTextElement("Hide the content area", this::hideContentArea));
	mWidescreenItems.add(new EditTextElement("Hide extraction view", this::hideExtractionView));

	for (int i = 0; i < 7; i++) {
	mItemIdList.add("itemId" + i);
	mTitleList.add("Title " + i);
	mSubTitleList.add("subtitle " + i);
	mPrimaryImageResId.add(R.drawable.ic_launcher);
	mSecondaryItemId.add("imageId" + i);
	mSecondaryImageResId.add(R.drawable.ic_launcher);
	}

	mWidescreenItems.add(
	new EditTextElement("Add icon to extracted view", this::addIconToExtractedView));
	mWidescreenItems.add(new EditTextElement("Add error message to content area",
	this::addErrorDescToContentArea));

	CarUiRecyclerView recyclerView = requireViewById(R.id.list);
	recyclerView.setAdapter(mAdapter);
	}

	private void addIconToExtractedView(View view, boolean hasFocus) {
	if (!hasFocus) {
	return;
	}

	Bundle bundle = new Bundle();
	bundle.putInt(WIDE_SCREEN_EXTRACTED_TEXT_ICON_RES_ID, R.drawable.car_ui_icon_edit);
	mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
	}

	private void addErrorDescToContentArea(View view, boolean hasFocus) {
	if (!hasFocus) {
	return;
	}

	Bundle bundle = new Bundle();
	bundle.putString(ADD_ERROR_DESC_TO_INPUT_AREA, "Some error message");
	bundle.putString(ADD_DESC_TITLE_TO_CONTENT_AREA, "Title");
	bundle.putString(ADD_DESC_TO_CONTENT_AREA, "Description provided by the application");
	mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
	}

	private void hideExtractionView(View view, boolean hasFocus) {
	if (!hasFocus) {
	return;
	}

	EditText editText = (EditText) view;
	editText.setImeOptions(IME_FLAG_NO_EXTRACT_UI);

	Bundle bundle = new Bundle();
	bundle.putBoolean(REQUEST_RENDER_CONTENT_AREA, false);
	mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
	}

	private void addDescToContentArea(View view, boolean hasFocus) {
	if (!hasFocus) {
	return;
	}

	Bundle bundle = new Bundle();
	bundle.putString(ADD_DESC_TITLE_TO_CONTENT_AREA, "Title");
	bundle.putString(ADD_DESC_TO_CONTENT_AREA, "Description provided by the application");
	mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
	}

	private void hideContentArea(View view, boolean hasFocus) {
	if (!hasFocus) {
	return;
	}

	Bundle bundle = new Bundle();
	bundle.putBoolean(REQUEST_RENDER_CONTENT_AREA, false);
	mInputMethodManager.sendAppPrivateCommand(view, WIDE_SCREEN_ACTION, bundle);
	}


	private abstract static class ViewHolder extends RecyclerView.ViewHolder {

	ViewHolder(@NonNull View itemView) {
	super(itemView);
	}

	public abstract void bind(ListElement element);
	}

	private static class EditTextViewHolder extends ViewHolder {
	private final EditText mEditText;

	EditTextViewHolder(@NonNull View itemView) {
	super(itemView);
	mEditText = itemView.requireViewById(R.id.edit_text);
	}

	@Override
	public void bind(ListElement e) {
	if (!(e instanceof EditTextElement)) {
	throw new IllegalArgumentException("Expected an EditTextElement");
	}
	EditTextElement element = (EditTextElement) e;
	mEditText.setText(element.getText());
	mEditText.setOnFocusChangeListener(element.getOnFocusChangeListener());
	}
	}

	private static class ButtonViewHolder extends ViewHolder {
	private final Switch mSwitch;

	ButtonViewHolder(@NonNull View itemView) {
	super(itemView);
	mSwitch = itemView.requireViewById(R.id.button);
	}

	@Override
	public void bind(ListElement e) {
	if (!(e instanceof ButtonElement)) {
	throw new IllegalArgumentException("Expected an ButtonElement");
	}
	ButtonElement element = (ButtonElement) e;
	mSwitch.setText(element.getText());
	mSwitch.setOnClickListener(element.getOnClickListener());
	mSwitch.setChecked(false);
	}
	}

	private final RecyclerView.Adapter<ViewHolder> mAdapter =
	new RecyclerView.Adapter<ViewHolder>() {
	@Override
	public int getItemCount() {
	return mWidescreenItems.size();
	}

	@Override
	public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
	LayoutInflater inflater = LayoutInflater.from(parent.getContext());
	if (viewType == ListElement.TYPE_EDIT_TEXT) {
	return new EditTextViewHolder(
	inflater.inflate(R.layout.edit_text_list_item, parent, false));
	} else if (viewType == ListElement.TYPE_BUTTON) {
	return new ButtonViewHolder(
	inflater.inflate(R.layout.list_item_switch, parent, false));
	} else {
	throw new IllegalArgumentException("Unknown viewType: " + viewType);
	}
	}

	@Override
	public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
	holder.bind(mWidescreenItems.get(position));
	}

	@Override
	public int getItemViewType(int position) {
	return mWidescreenItems.get(position).getType();
	}
	};

	@Override
	public void onCarUiInsetsChanged(@NonNull Insets insets) {
	requireViewById(R.id.list)
	.setPadding(0, insets.getTop(), 0, insets.getBottom());
	requireViewById(android.R.id.content)
	.setPadding(insets.getLeft(), 0, insets.getRight(), 0);
	}

	private abstract static class ListElement {
	static final int TYPE_EDIT_TEXT = 0;
	static final int TYPE_BUTTON = 1;

	private final String mText;

	ListElement(String text) {
	mText = text;
	}

	String getText() {
	return mText;
	}

	abstract int getType();
	}

	private static class EditTextElement extends ListElement {
	private OnFocusChangeListener mListener;

	EditTextElement(String text, OnFocusChangeListener listener) {
	super(text);
	mListener = listener;
	}

	OnFocusChangeListener getOnFocusChangeListener() {
	return mListener;
	}

	@Override
	int getType() {
	return TYPE_EDIT_TEXT;
	}
	}

	private static class ButtonElement extends ListElement {
	private OnClickListener mOnClickListener;

	ButtonElement(String text, OnClickListener listener) {
	super(text);
	mOnClickListener = listener;
	}

	public OnClickListener getOnClickListener() {
	return mOnClickListener;
	}

	@Override
	int getType() {
	return TYPE_BUTTON;
	}
	}
	}