wearable/wear/WatchFace/Wearable/src/main/java/com/example/android/wearable/watchface/config/AnalogComplicationConfigRecyclerViewAdapter.java

/*
 * Copyright (C) 2017 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.example.android.wearable.watchface.config;

import static com.example.android.wearable.watchface.config.ColorSelectionActivity.EXTRA_SHARED_PREF;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.graphics.drawable.Drawable;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.support.wearable.complications.ComplicationHelperActivity;
import android.support.wearable.complications.ComplicationProviderInfo;
import android.support.wearable.complications.ProviderInfoRetriever;
import android.support.wearable.complications.ProviderInfoRetriever.OnProviderInfoReceivedCallback;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.Switch;
import android.widget.Toast;

import com.example.android.wearable.watchface.R;
import com.example.android.wearable.watchface.model.AnalogComplicationConfigData.BackgroundComplicationConfigItem;
import com.example.android.wearable.watchface.model.AnalogComplicationConfigData.ColorConfigItem;
import com.example.android.wearable.watchface.model.AnalogComplicationConfigData.ConfigItemType;
import com.example.android.wearable.watchface.model.AnalogComplicationConfigData.MoreOptionsConfigItem;
import com.example.android.wearable.watchface.model.AnalogComplicationConfigData.PreviewAndComplicationsConfigItem;
import com.example.android.wearable.watchface.model.AnalogComplicationConfigData.UnreadNotificationConfigItem;
import com.example.android.wearable.watchface.watchface.AnalogComplicationWatchFaceService;

import java.util.ArrayList;
import java.util.concurrent.Executors;

/**
 * Displays different layouts for configuring watch face's complications and appearance settings
 * (highlight color [second arm], background color, unread notifications, etc.).
 *
 * <p>All appearance settings are saved via {@link SharedPreferences}.
 *
 * <p>Layouts provided by this adapter are split into 5 main view types.
 *
 * <p>A watch face preview including complications. Allows user to tap on the complications to
 * change the complication data and see a live preview of the watch face.
 *
 * <p>Simple arrow to indicate there are more options below the fold.
 *
 * <p>Color configuration options for both highlight (seconds hand) and background color.
 *
 * <p>Toggle for unread notifications.
 *
 * <p>Background image complication configuration for changing background image of watch face.
 */
public class AnalogComplicationConfigRecyclerViewAdapter
        extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private static final String TAG = "CompConfigAdapter";

    /**
     * Used by associated watch face ({@link AnalogComplicationWatchFaceService}) to let this
     * adapter know which complication locations are supported, their ids, and supported
     * complication data types.
     */
    public enum ComplicationLocation {
        BACKGROUND,
        LEFT,
        RIGHT,
        TOP,
        BOTTOM
    }

    public static final int TYPE_PREVIEW_AND_COMPLICATIONS_CONFIG = 0;
    public static final int TYPE_MORE_OPTIONS = 1;
    public static final int TYPE_COLOR_CONFIG = 2;
    public static final int TYPE_UNREAD_NOTIFICATION_CONFIG = 3;
    public static final int TYPE_BACKGROUND_COMPLICATION_IMAGE_CONFIG = 4;

    // ComponentName associated with watch face service (service that renders watch face). Used
    // to retrieve complication information.
    private ComponentName mWatchFaceComponentName;

    private ArrayList<ConfigItemType> mSettingsDataSet;

    private Context mContext;

    SharedPreferences mSharedPref;

    // Selected complication id by user.
    private int mSelectedComplicationId;

    private int mBackgroundComplicationId;
    private int mLeftComplicationId;
    private int mRightComplicationId;

    // Required to retrieve complication data from watch face for preview.
    private ProviderInfoRetriever mProviderInfoRetriever;

    // Maintains reference view holder to dynamically update watch face preview. Used instead of
    // notifyItemChanged(int position) to avoid flicker and re-inflating the view.
    private PreviewAndComplicationsViewHolder mPreviewAndComplicationsViewHolder;

    public AnalogComplicationConfigRecyclerViewAdapter(
            Context context,
            Class watchFaceServiceClass,
            ArrayList<ConfigItemType> settingsDataSet) {

        mContext = context;
        mWatchFaceComponentName = new ComponentName(mContext, watchFaceServiceClass);
        mSettingsDataSet = settingsDataSet;

        // Default value is invalid (only changed when user taps to change complication).
        mSelectedComplicationId = -1;

        mBackgroundComplicationId =
                AnalogComplicationWatchFaceService.getComplicationId(
                        ComplicationLocation.BACKGROUND);

        mLeftComplicationId =
                AnalogComplicationWatchFaceService.getComplicationId(ComplicationLocation.LEFT);
        mRightComplicationId =
                AnalogComplicationWatchFaceService.getComplicationId(ComplicationLocation.RIGHT);

        mSharedPref =
                context.getSharedPreferences(
                        context.getString(R.string.analog_complication_preference_file_key),
                        Context.MODE_PRIVATE);

        // Initialization of code to retrieve active complication data for the watch face.
        mProviderInfoRetriever =
                new ProviderInfoRetriever(mContext, Executors.newCachedThreadPool());
        mProviderInfoRetriever.init();
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        Log.d(TAG, "onCreateViewHolder(): viewType: " + viewType);

        RecyclerView.ViewHolder viewHolder = null;

        switch (viewType) {
            case TYPE_PREVIEW_AND_COMPLICATIONS_CONFIG:
                // Need direct reference to watch face preview view holder to update watch face
                // preview based on selections from the user.
                mPreviewAndComplicationsViewHolder =
                        new PreviewAndComplicationsViewHolder(
                                LayoutInflater.from(parent.getContext())
                                        .inflate(
                                                R.layout.config_list_preview_and_complications_item,
                                                parent,
                                                false));
                viewHolder = mPreviewAndComplicationsViewHolder;
                break;

            case TYPE_MORE_OPTIONS:
                viewHolder =
                        new MoreOptionsViewHolder(
                                LayoutInflater.from(parent.getContext())
                                        .inflate(
                                                R.layout.config_list_more_options_item,
                                                parent,
                                                false));
                break;

            case TYPE_COLOR_CONFIG:
                viewHolder =
                        new ColorPickerViewHolder(
                                LayoutInflater.from(parent.getContext())
                                        .inflate(R.layout.config_list_color_item, parent, false));
                break;

            case TYPE_UNREAD_NOTIFICATION_CONFIG:
                viewHolder =
                        new UnreadNotificationViewHolder(
                                LayoutInflater.from(parent.getContext())
                                        .inflate(
                                                R.layout.config_list_unread_notif_item,
                                                parent,
                                                false));
                break;

            case TYPE_BACKGROUND_COMPLICATION_IMAGE_CONFIG:
                viewHolder =
                        new BackgroundComplicationViewHolder(
                                LayoutInflater.from(parent.getContext())
                                        .inflate(
                                                R.layout.config_list_background_complication_item,
                                                parent,
                                                false));
                break;
        }

        return viewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
        Log.d(TAG, "Element " + position + " set.");

        // Pulls all data required for creating the UX for the specific setting option.
        ConfigItemType configItemType = mSettingsDataSet.get(position);

        switch (viewHolder.getItemViewType()) {
            case TYPE_PREVIEW_AND_COMPLICATIONS_CONFIG:
                PreviewAndComplicationsViewHolder previewAndComplicationsViewHolder =
                        (PreviewAndComplicationsViewHolder) viewHolder;

                PreviewAndComplicationsConfigItem previewAndComplicationsConfigItem =
                        (PreviewAndComplicationsConfigItem) configItemType;

                int defaultComplicationResourceId =
                        previewAndComplicationsConfigItem.getDefaultComplicationResourceId();
                previewAndComplicationsViewHolder.setDefaultComplicationDrawable(
                        defaultComplicationResourceId);

                previewAndComplicationsViewHolder.initializesColorsAndComplications();
                break;

            case TYPE_MORE_OPTIONS:
                MoreOptionsViewHolder moreOptionsViewHolder = (MoreOptionsViewHolder) viewHolder;
                MoreOptionsConfigItem moreOptionsConfigItem =
                        (MoreOptionsConfigItem) configItemType;

                moreOptionsViewHolder.setIcon(moreOptionsConfigItem.getIconResourceId());
                break;

            case TYPE_COLOR_CONFIG:
                ColorPickerViewHolder colorPickerViewHolder = (ColorPickerViewHolder) viewHolder;
                ColorConfigItem colorConfigItem = (ColorConfigItem) configItemType;

                int iconResourceId = colorConfigItem.getIconResourceId();
                String name = colorConfigItem.getName();
                String sharedPrefString = colorConfigItem.getSharedPrefString();
                Class<ColorSelectionActivity> activity =
                        colorConfigItem.getActivityToChoosePreference();

                colorPickerViewHolder.setIcon(iconResourceId);
                colorPickerViewHolder.setName(name);
                colorPickerViewHolder.setSharedPrefString(sharedPrefString);
                colorPickerViewHolder.setLaunchActivityToSelectColor(activity);
                break;

            case TYPE_UNREAD_NOTIFICATION_CONFIG:
                UnreadNotificationViewHolder unreadViewHolder =
                        (UnreadNotificationViewHolder) viewHolder;

                UnreadNotificationConfigItem unreadConfigItem =
                        (UnreadNotificationConfigItem) configItemType;

                int unreadEnabledIconResourceId = unreadConfigItem.getIconEnabledResourceId();
                int unreadDisabledIconResourceId = unreadConfigItem.getIconDisabledResourceId();

                String unreadName = unreadConfigItem.getName();
                int unreadSharedPrefId = unreadConfigItem.getSharedPrefId();

                unreadViewHolder.setIcons(
                        unreadEnabledIconResourceId, unreadDisabledIconResourceId);
                unreadViewHolder.setName(unreadName);
                unreadViewHolder.setSharedPrefId(unreadSharedPrefId);
                break;

            case TYPE_BACKGROUND_COMPLICATION_IMAGE_CONFIG:
                BackgroundComplicationViewHolder backgroundComplicationViewHolder =
                        (BackgroundComplicationViewHolder) viewHolder;

                BackgroundComplicationConfigItem backgroundComplicationConfigItem =
                        (BackgroundComplicationConfigItem) configItemType;

                int backgroundIconResourceId = backgroundComplicationConfigItem.getIconResourceId();
                String backgroundName = backgroundComplicationConfigItem.getName();

                backgroundComplicationViewHolder.setIcon(backgroundIconResourceId);
                backgroundComplicationViewHolder.setName(backgroundName);
                break;
        }
    }

    @Override
    public int getItemViewType(int position) {
        ConfigItemType configItemType = mSettingsDataSet.get(position);
        return configItemType.getConfigType();
    }

    @Override
    public int getItemCount() {
        return mSettingsDataSet.size();
    }

    /** Updates the selected complication id saved earlier with the new information. */
    public void updateSelectedComplication(ComplicationProviderInfo complicationProviderInfo) {

        Log.d(TAG, "updateSelectedComplication: " + mPreviewAndComplicationsViewHolder);

        // Checks if view is inflated and complication id is valid.
        if (mPreviewAndComplicationsViewHolder != null && mSelectedComplicationId >= 0) {
            mPreviewAndComplicationsViewHolder.updateComplicationViews(
                    mSelectedComplicationId, complicationProviderInfo);
        }
    }

    @Override
    public void onDetachedFromRecyclerView(RecyclerView recyclerView) {
        super.onDetachedFromRecyclerView(recyclerView);
        // Required to release retriever for active complication data on detach.
        mProviderInfoRetriever.release();
    }

    public void updatePreviewColors() {
        Log.d(TAG, "updatePreviewColors(): " + mPreviewAndComplicationsViewHolder);

        if (mPreviewAndComplicationsViewHolder != null) {
            mPreviewAndComplicationsViewHolder.updateWatchFaceColors();
        }
    }

    /**
     * Displays watch face preview along with complication locations. Allows user to tap on the
     * complication they want to change and preview updates dynamically.
     */
    public class PreviewAndComplicationsViewHolder extends RecyclerView.ViewHolder
            implements OnClickListener {

        private View mWatchFaceArmsAndTicksView;
        private View mWatchFaceHighlightPreviewView;
        private ImageView mWatchFaceBackgroundPreviewImageView;

        private ImageView mLeftComplicationBackground;
        private ImageView mRightComplicationBackground;

        private ImageButton mLeftComplication;
        private ImageButton mRightComplication;

        private Drawable mDefaultComplicationDrawable;

        private boolean mBackgroundComplicationEnabled;

        public PreviewAndComplicationsViewHolder(final View view) {
            super(view);

            mWatchFaceBackgroundPreviewImageView =
                    (ImageView) view.findViewById(R.id.watch_face_background);
            mWatchFaceArmsAndTicksView = view.findViewById(R.id.watch_face_arms_and_ticks);

            // In our case, just the second arm.
            mWatchFaceHighlightPreviewView = view.findViewById(R.id.watch_face_highlight);

            // Sets up left complication preview.
            mLeftComplicationBackground =
                    (ImageView) view.findViewById(R.id.left_complication_background);
            mLeftComplication = (ImageButton) view.findViewById(R.id.left_complication);
            mLeftComplication.setOnClickListener(this);

            // Sets up right complication preview.
            mRightComplicationBackground =
                    (ImageView) view.findViewById(R.id.right_complication_background);
            mRightComplication = (ImageButton) view.findViewById(R.id.right_complication);
            mRightComplication.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            if (view.equals(mLeftComplication)) {
                Log.d(TAG, "Left Complication click()");

                Activity currentActivity = (Activity) view.getContext();
                launchComplicationHelperActivity(currentActivity, ComplicationLocation.LEFT);

            } else if (view.equals(mRightComplication)) {
                Log.d(TAG, "Right Complication click()");

                Activity currentActivity = (Activity) view.getContext();
                launchComplicationHelperActivity(currentActivity, ComplicationLocation.RIGHT);
            }
        }

        public void updateWatchFaceColors() {

            // Only update background colors for preview if background complications are disabled.
            if (!mBackgroundComplicationEnabled) {
                // Updates background color.
                String backgroundSharedPrefString =
                        mContext.getString(R.string.saved_background_color);
                int currentBackgroundColor =
                        mSharedPref.getInt(backgroundSharedPrefString, Color.BLACK);

                PorterDuffColorFilter backgroundColorFilter =
                        new PorterDuffColorFilter(currentBackgroundColor, PorterDuff.Mode.SRC_ATOP);

                mWatchFaceBackgroundPreviewImageView
                        .getBackground()
                        .setColorFilter(backgroundColorFilter);

            } else {
                // Inform user that they need to disable background image for color to work.
                CharSequence text = "Selected image overrides background color.";
                int duration = Toast.LENGTH_SHORT;
                Toast toast = Toast.makeText(mContext, text, duration);
                toast.setGravity(Gravity.CENTER, 0, 0);
                toast.show();
            }

            // Updates highlight color (just second arm).
            String highlightSharedPrefString = mContext.getString(R.string.saved_marker_color);
            int currentHighlightColor = mSharedPref.getInt(highlightSharedPrefString, Color.RED);

            PorterDuffColorFilter highlightColorFilter =
                    new PorterDuffColorFilter(currentHighlightColor, PorterDuff.Mode.SRC_ATOP);

            mWatchFaceHighlightPreviewView.getBackground().setColorFilter(highlightColorFilter);
        }

        // Verifies the watch face supports the complication location, then launches the helper
        // class, so user can choose their complication data provider.
        private void launchComplicationHelperActivity(
                Activity currentActivity, ComplicationLocation complicationLocation) {

            mSelectedComplicationId =
                    AnalogComplicationWatchFaceService.getComplicationId(complicationLocation);

            mBackgroundComplicationEnabled = false;

            if (mSelectedComplicationId >= 0) {

                int[] supportedTypes =
                        AnalogComplicationWatchFaceService.getSupportedComplicationTypes(
                                complicationLocation);

                ComponentName watchFace =
                        new ComponentName(
                                currentActivity, AnalogComplicationWatchFaceService.class);

                currentActivity.startActivityForResult(
                        ComplicationHelperActivity.createProviderChooserHelperIntent(
                                currentActivity,
                                watchFace,
                                mSelectedComplicationId,
                                supportedTypes),
                        AnalogComplicationConfigActivity.COMPLICATION_CONFIG_REQUEST_CODE);

            } else {
                Log.d(TAG, "Complication not supported by watch face.");
            }
        }

        public void setDefaultComplicationDrawable(int resourceId) {
            Context context = mWatchFaceArmsAndTicksView.getContext();
            mDefaultComplicationDrawable = context.getDrawable(resourceId);

            mLeftComplication.setImageDrawable(mDefaultComplicationDrawable);
            mLeftComplicationBackground.setVisibility(View.INVISIBLE);

            mRightComplication.setImageDrawable(mDefaultComplicationDrawable);
            mRightComplicationBackground.setVisibility(View.INVISIBLE);
        }

        public void updateComplicationViews(
                int watchFaceComplicationId, ComplicationProviderInfo complicationProviderInfo) {
            Log.d(TAG, "updateComplicationViews(): id: " + watchFaceComplicationId);
            Log.d(TAG, "\tinfo: " + complicationProviderInfo);

            if (watchFaceComplicationId == mBackgroundComplicationId) {
                if (complicationProviderInfo != null) {
                    mBackgroundComplicationEnabled = true;

                    // Since we can't get the background complication image outside of the
                    // watch face, we set the icon for that provider instead with a gray background.
                    PorterDuffColorFilter backgroundColorFilter =
                            new PorterDuffColorFilter(Color.GRAY, PorterDuff.Mode.SRC_ATOP);

                    mWatchFaceBackgroundPreviewImageView
                            .getBackground()
                            .setColorFilter(backgroundColorFilter);
                    mWatchFaceBackgroundPreviewImageView.setImageIcon(
                            complicationProviderInfo.providerIcon);

                } else {
                    mBackgroundComplicationEnabled = false;

                    // Clears icon for background if it was present before.
                    mWatchFaceBackgroundPreviewImageView.setImageResource(
                            android.R.color.transparent);
                    String backgroundSharedPrefString =
                            mContext.getString(R.string.saved_background_color);
                    int currentBackgroundColor =
                            mSharedPref.getInt(backgroundSharedPrefString, Color.BLACK);

                    PorterDuffColorFilter backgroundColorFilter =
                            new PorterDuffColorFilter(
                                    currentBackgroundColor, PorterDuff.Mode.SRC_ATOP);

                    mWatchFaceBackgroundPreviewImageView
                            .getBackground()
                            .setColorFilter(backgroundColorFilter);
                }

            } else if (watchFaceComplicationId == mLeftComplicationId) {
                updateComplicationView(complicationProviderInfo, mLeftComplication,
                    mLeftComplicationBackground);

            } else if (watchFaceComplicationId == mRightComplicationId) {
                updateComplicationView(complicationProviderInfo, mRightComplication,
                    mRightComplicationBackground);
            }
        }

        private void updateComplicationView(ComplicationProviderInfo complicationProviderInfo,
            ImageButton button, ImageView background) {
            if (complicationProviderInfo != null) {
                button.setImageIcon(complicationProviderInfo.providerIcon);
                button.setContentDescription(
                    mContext.getString(R.string.edit_complication,
                        complicationProviderInfo.appName + " " +
                            complicationProviderInfo.providerName));
                background.setVisibility(View.VISIBLE);
            } else {
                button.setImageDrawable(mDefaultComplicationDrawable);
                button.setContentDescription(mContext.getString(R.string.add_complication));
                background.setVisibility(View.INVISIBLE);
            }
        }

        public void initializesColorsAndComplications() {

            // Initializes highlight color (just second arm and part of complications).
            String highlightSharedPrefString = mContext.getString(R.string.saved_marker_color);
            int currentHighlightColor = mSharedPref.getInt(highlightSharedPrefString, Color.RED);

            PorterDuffColorFilter highlightColorFilter =
                    new PorterDuffColorFilter(currentHighlightColor, PorterDuff.Mode.SRC_ATOP);

            mWatchFaceHighlightPreviewView.getBackground().setColorFilter(highlightColorFilter);

            // Initializes background color to gray (updates to color or complication icon based
            // on whether the background complication is live or not.
            PorterDuffColorFilter backgroundColorFilter =
                    new PorterDuffColorFilter(Color.GRAY, PorterDuff.Mode.SRC_ATOP);

            mWatchFaceBackgroundPreviewImageView
                    .getBackground()
                    .setColorFilter(backgroundColorFilter);

            final int[] complicationIds = AnalogComplicationWatchFaceService.getComplicationIds();

            mProviderInfoRetriever.retrieveProviderInfo(
                    new OnProviderInfoReceivedCallback() {
                        @Override
                        public void onProviderInfoReceived(
                                int watchFaceComplicationId,
                                @Nullable ComplicationProviderInfo complicationProviderInfo) {

                            Log.d(TAG, "onProviderInfoReceived: " + complicationProviderInfo);

                            updateComplicationViews(
                                    watchFaceComplicationId, complicationProviderInfo);
                        }
                    },
                    mWatchFaceComponentName,
                    complicationIds);
        }
    }

    /** Displays icon to indicate there are more options below the fold. */
    public class MoreOptionsViewHolder extends RecyclerView.ViewHolder {

        private ImageView mMoreOptionsImageView;

        public MoreOptionsViewHolder(View view) {
            super(view);
            mMoreOptionsImageView = (ImageView) view.findViewById(R.id.more_options_image_view);
        }

        public void setIcon(int resourceId) {
            Context context = mMoreOptionsImageView.getContext();
            mMoreOptionsImageView.setImageDrawable(context.getDrawable(resourceId));
        }
    }

    /**
     * Displays color options for the an item on the watch face. These could include marker color,
     * background color, etc.
     */
    public class ColorPickerViewHolder extends RecyclerView.ViewHolder implements OnClickListener {

        private Button mAppearanceButton;

        private String mSharedPrefResourceString;

        private Class<ColorSelectionActivity> mLaunchActivityToSelectColor;

        public ColorPickerViewHolder(View view) {
            super(view);

            mAppearanceButton = (Button) view.findViewById(R.id.color_picker_button);
            view.setOnClickListener(this);
        }

        public void setName(String name) {
            mAppearanceButton.setText(name);
        }

        public void setIcon(int resourceId) {
            Context context = mAppearanceButton.getContext();
            mAppearanceButton.setCompoundDrawablesWithIntrinsicBounds(
                    context.getDrawable(resourceId), null, null, null);
        }

        public void setSharedPrefString(String sharedPrefString) {
            mSharedPrefResourceString = sharedPrefString;
        }

        public void setLaunchActivityToSelectColor(Class<ColorSelectionActivity> activity) {
            mLaunchActivityToSelectColor = activity;
        }

        @Override
        public void onClick(View view) {
            int position = getAdapterPosition();
            Log.d(TAG, "Complication onClick() position: " + position);

            if (mLaunchActivityToSelectColor != null) {
                Intent launchIntent = new Intent(view.getContext(), mLaunchActivityToSelectColor);

                // Pass shared preference name to save color value to.
                launchIntent.putExtra(EXTRA_SHARED_PREF, mSharedPrefResourceString);

                Activity activity = (Activity) view.getContext();
                activity.startActivityForResult(
                        launchIntent,
                        AnalogComplicationConfigActivity.UPDATE_COLORS_CONFIG_REQUEST_CODE);
            }
        }
    }

    /**
     * Displays switch to indicate whether or not icon appears for unread notifications. User can
     * toggle on/off.
     */
    public class UnreadNotificationViewHolder extends RecyclerView.ViewHolder
            implements OnClickListener {

        private Switch mUnreadNotificationSwitch;

        private int mEnabledIconResourceId;
        private int mDisabledIconResourceId;

        private int mSharedPrefResourceId;

        public UnreadNotificationViewHolder(View view) {
            super(view);

            mUnreadNotificationSwitch = (Switch) view.findViewById(R.id.unread_notification_switch);
            view.setOnClickListener(this);
        }

        public void setName(String name) {
            mUnreadNotificationSwitch.setText(name);
        }

        public void setIcons(int enabledIconResourceId, int disabledIconResourceId) {

            mEnabledIconResourceId = enabledIconResourceId;
            mDisabledIconResourceId = disabledIconResourceId;

            Context context = mUnreadNotificationSwitch.getContext();

            // Set default to enabled.
            mUnreadNotificationSwitch.setCompoundDrawablesWithIntrinsicBounds(
                    context.getDrawable(mEnabledIconResourceId), null, null, null);
        }

        public void setSharedPrefId(int sharedPrefId) {
            mSharedPrefResourceId = sharedPrefId;

            if (mUnreadNotificationSwitch != null) {

                Context context = mUnreadNotificationSwitch.getContext();
                String sharedPreferenceString = context.getString(mSharedPrefResourceId);
                Boolean currentState = mSharedPref.getBoolean(sharedPreferenceString, true);

                updateIcon(context, currentState);
            }
        }

        private void updateIcon(Context context, Boolean currentState) {
            int currentIconResourceId;

            if (currentState) {
                currentIconResourceId = mEnabledIconResourceId;
            } else {
                currentIconResourceId = mDisabledIconResourceId;
            }

            mUnreadNotificationSwitch.setChecked(currentState);
            mUnreadNotificationSwitch.setCompoundDrawablesWithIntrinsicBounds(
                    context.getDrawable(currentIconResourceId), null, null, null);
        }

        @Override
        public void onClick(View view) {
            int position = getAdapterPosition();
            Log.d(TAG, "Complication onClick() position: " + position);

            Context context = view.getContext();
            String sharedPreferenceString = context.getString(mSharedPrefResourceId);

            // Since user clicked on a switch, new state should be opposite of current state.
            Boolean newState = !mSharedPref.getBoolean(sharedPreferenceString, true);

            SharedPreferences.Editor editor = mSharedPref.edit();
            editor.putBoolean(sharedPreferenceString, newState);
            editor.apply();

            updateIcon(context, newState);
        }
    }

    /** Displays button to trigger background image complication selector. */
    public class BackgroundComplicationViewHolder extends RecyclerView.ViewHolder
            implements OnClickListener {

        private Button mBackgroundComplicationButton;

        public BackgroundComplicationViewHolder(View view) {
            super(view);

            mBackgroundComplicationButton =
                    (Button) view.findViewById(R.id.background_complication_button);
            view.setOnClickListener(this);
        }

        public void setName(String name) {
            mBackgroundComplicationButton.setText(name);
        }

        public void setIcon(int resourceId) {
            Context context = mBackgroundComplicationButton.getContext();
            mBackgroundComplicationButton.setCompoundDrawablesWithIntrinsicBounds(
                    context.getDrawable(resourceId), null, null, null);
        }

        @Override
        public void onClick(View view) {
            int position = getAdapterPosition();
            Log.d(TAG, "Background Complication onClick() position: " + position);

            Activity currentActivity = (Activity) view.getContext();

            mSelectedComplicationId =
                    AnalogComplicationWatchFaceService.getComplicationId(
                            ComplicationLocation.BACKGROUND);

            if (mSelectedComplicationId >= 0) {

                int[] supportedTypes =
                        AnalogComplicationWatchFaceService.getSupportedComplicationTypes(
                                ComplicationLocation.BACKGROUND);

                ComponentName watchFace =
                        new ComponentName(
                                currentActivity, AnalogComplicationWatchFaceService.class);

                currentActivity.startActivityForResult(
                        ComplicationHelperActivity.createProviderChooserHelperIntent(
                                currentActivity,
                                watchFace,
                                mSelectedComplicationId,
                                supportedTypes),
                        AnalogComplicationConfigActivity.COMPLICATION_CONFIG_REQUEST_CODE);

            } else {
                Log.d(TAG, "Complication not supported by watch face.");
            }
        }
    }
}