com/android/internal/widget/MessagingLayout.java - platform/prebuilts/fullsdk/sources/android-28 - Git at Google

 /*
  * 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.android.internal.widget;

 import android.annotation.AttrRes;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.StyleRes;
 import android.app.Notification;
 import android.app.Person;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Rect;
 import android.graphics.drawable.Icon;
 import android.os.Bundle;
 import android.os.Parcelable;
 import android.text.TextUtils;
 import android.util.ArrayMap;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
 import android.view.RemotableViewMethod;
 import android.view.ViewTreeObserver;
 import android.view.animation.Interpolator;
 import android.view.animation.PathInterpolator;
 import android.widget.FrameLayout;
 import android.widget.RemoteViews;
 import android.widget.TextView;

 import com.android.internal.R;
 import com.android.internal.graphics.ColorUtils;
 import com.android.internal.util.NotificationColorUtil;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.Consumer;

 /**
  * A custom-built layout for the Notification.MessagingStyle allows dynamic addition and removal
  * messages and adapts the layout accordingly.
  */
 @RemoteViews.RemoteView
 public class MessagingLayout extends FrameLayout {

     private static final float COLOR_SHIFT_AMOUNT = 60;
     private static final Consumer<MessagingMessage> REMOVE_MESSAGE
             = MessagingMessage::removeMessage;
     public static final Interpolator LINEAR_OUT_SLOW_IN = new PathInterpolator(0f, 0f, 0.2f, 1f);
     public static final Interpolator FAST_OUT_LINEAR_IN = new PathInterpolator(0.4f, 0f, 1f, 1f);
     public static final Interpolator FAST_OUT_SLOW_IN = new PathInterpolator(0.4f, 0f, 0.2f, 1f);
     public static final OnLayoutChangeListener MESSAGING_PROPERTY_ANIMATOR
             = new MessagingPropertyAnimator();
     private List<MessagingMessage> mMessages = new ArrayList<>();
     private List<MessagingMessage> mHistoricMessages = new ArrayList<>();
     private MessagingLinearLayout mMessagingLinearLayout;
     private boolean mShowHistoricMessages;
     private ArrayList<MessagingGroup> mGroups = new ArrayList<>();
     private TextView mTitleView;
     private int mLayoutColor;
     private int mAvatarSize;
     private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
     private Paint mTextPaint = new Paint();
     private CharSequence mConversationTitle;
     private Icon mLargeIcon;
     private boolean mIsOneToOne;
     private ArrayList<MessagingGroup> mAddedGroups = new ArrayList<>();
     private Person mUser;
     private CharSequence mNameReplacement;
     private boolean mDisplayImagesAtEnd;

     public MessagingLayout(@NonNull Context context) {
         super(context);
     }

     public MessagingLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
         super(context, attrs);
     }

     public MessagingLayout(@NonNull Context context, @Nullable AttributeSet attrs,
             @AttrRes int defStyleAttr) {
         super(context, attrs, defStyleAttr);
     }

     public MessagingLayout(@NonNull Context context, @Nullable AttributeSet attrs,
             @AttrRes int defStyleAttr, @StyleRes int defStyleRes) {
         super(context, attrs, defStyleAttr, defStyleRes);
     }

     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
         mMessagingLinearLayout = findViewById(R.id.notification_messaging);
         mMessagingLinearLayout.setMessagingLayout(this);
         // We still want to clip, but only on the top, since views can temporarily out of bounds
         // during transitions.
         DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
         Rect rect = new Rect(0, 0, displayMetrics.widthPixels, displayMetrics.heightPixels);
         mMessagingLinearLayout.setClipBounds(rect);
         mTitleView = findViewById(R.id.title);
         mAvatarSize = getResources().getDimensionPixelSize(R.dimen.messaging_avatar_size);
         mTextPaint.setTextAlign(Paint.Align.CENTER);
         mTextPaint.setAntiAlias(true);
     }

     @RemotableViewMethod
     public void setLargeIcon(Icon icon) {
         mLargeIcon = icon;
     }

     @RemotableViewMethod
     public void setNameReplacement(CharSequence nameReplacement) {
         mNameReplacement = nameReplacement;
     }

     @RemotableViewMethod
     public void setDisplayImagesAtEnd(boolean atEnd) {
         mDisplayImagesAtEnd = atEnd;
     }

     @RemotableViewMethod
     public void setData(Bundle extras) {
         Parcelable[] messages = extras.getParcelableArray(Notification.EXTRA_MESSAGES);
         List<Notification.MessagingStyle.Message> newMessages
                 = Notification.MessagingStyle.Message.getMessagesFromBundleArray(messages);
         Parcelable[] histMessages = extras.getParcelableArray(Notification.EXTRA_HISTORIC_MESSAGES);
         List<Notification.MessagingStyle.Message> newHistoricMessages
                 = Notification.MessagingStyle.Message.getMessagesFromBundleArray(histMessages);
         setUser(extras.getParcelable(Notification.EXTRA_MESSAGING_PERSON));
         mConversationTitle = null;
         TextView headerText = findViewById(R.id.header_text);
         if (headerText != null) {
             mConversationTitle = headerText.getText();
         }
         addRemoteInputHistoryToMessages(newMessages,
                 extras.getCharSequenceArray(Notification.EXTRA_REMOTE_INPUT_HISTORY));
         bind(newMessages, newHistoricMessages);
     }

     private void addRemoteInputHistoryToMessages(
             List<Notification.MessagingStyle.Message> newMessages,
             CharSequence[] remoteInputHistory) {
         if (remoteInputHistory == null || remoteInputHistory.length == 0) {
             return;
         }
         for (int i = remoteInputHistory.length - 1; i >= 0; i--) {
             CharSequence message = remoteInputHistory[i];
             newMessages.add(new Notification.MessagingStyle.Message(
                     message, 0, (Person) null));
         }
     }

     private void bind(List<Notification.MessagingStyle.Message> newMessages,
             List<Notification.MessagingStyle.Message> newHistoricMessages) {

         List<MessagingMessage> historicMessages = createMessages(newHistoricMessages,
                 true /* isHistoric */);
         List<MessagingMessage> messages = createMessages(newMessages, false /* isHistoric */);
         addMessagesToGroups(historicMessages, messages);

         // Let's remove the remaining messages
         mMessages.forEach(REMOVE_MESSAGE);
         mHistoricMessages.forEach(REMOVE_MESSAGE);

         mMessages = messages;
         mHistoricMessages = historicMessages;

         updateHistoricMessageVisibility();
         updateTitleAndNamesDisplay();
     }

     private void updateTitleAndNamesDisplay() {
         ArrayMap<CharSequence, String> uniqueNames = new ArrayMap<>();
         ArrayMap<Character, CharSequence> uniqueCharacters = new ArrayMap<>();
         for (int i = 0; i < mGroups.size(); i++) {
             MessagingGroup group = mGroups.get(i);
             CharSequence senderName = group.getSenderName();
             if (!group.needsGeneratedAvatar() || TextUtils.isEmpty(senderName)) {
                 continue;
             }
             if (!uniqueNames.containsKey(senderName)) {
                 char c = senderName.charAt(0);
                 if (uniqueCharacters.containsKey(c)) {
                     // this character was already used, lets make it more unique. We first need to
                     // resolve the existing character if it exists
                     CharSequence existingName = uniqueCharacters.get(c);
                     if (existingName != null) {
                         uniqueNames.put(existingName, findNameSplit((String) existingName));
                         uniqueCharacters.put(c, null);
                     }
                     uniqueNames.put(senderName, findNameSplit((String) senderName));
                 } else {
                     uniqueNames.put(senderName, Character.toString(c));
                     uniqueCharacters.put(c, senderName);
                 }
             }
         }

         // Now that we have the correct symbols, let's look what we have cached
         ArrayMap<CharSequence, Icon> cachedAvatars = new ArrayMap<>();
         for (int i = 0; i < mGroups.size(); i++) {
             // Let's now set the avatars
             MessagingGroup group = mGroups.get(i);
             boolean isOwnMessage = group.getSender() == mUser;
             CharSequence senderName = group.getSenderName();
             if (!group.needsGeneratedAvatar() || TextUtils.isEmpty(senderName)
                     || (mIsOneToOne && mLargeIcon != null && !isOwnMessage)) {
                 continue;
             }
             String symbol = uniqueNames.get(senderName);
             Icon cachedIcon = group.getAvatarSymbolIfMatching(senderName,
                     symbol, mLayoutColor);
             if (cachedIcon != null) {
                 cachedAvatars.put(senderName, cachedIcon);
             }
         }

         for (int i = 0; i < mGroups.size(); i++) {
             // Let's now set the avatars
             MessagingGroup group = mGroups.get(i);
             CharSequence senderName = group.getSenderName();
             if (!group.needsGeneratedAvatar() || TextUtils.isEmpty(senderName)) {
                 continue;
             }
             if (mIsOneToOne && mLargeIcon != null && group.getSender() != mUser) {
                 group.setAvatar(mLargeIcon);
             } else {
                 Icon cachedIcon = cachedAvatars.get(senderName);
                 if (cachedIcon == null) {
                     cachedIcon = createAvatarSymbol(senderName, uniqueNames.get(senderName),
                             mLayoutColor);
                     cachedAvatars.put(senderName, cachedIcon);
                 }
                 group.setCreatedAvatar(cachedIcon, senderName, uniqueNames.get(senderName),
                         mLayoutColor);
             }
         }
     }

     public Icon createAvatarSymbol(CharSequence senderName, String symbol, int layoutColor) {
         Bitmap bitmap = Bitmap.createBitmap(mAvatarSize, mAvatarSize, Bitmap.Config.ARGB_8888);
         Canvas canvas = new Canvas(bitmap);
         float radius = mAvatarSize / 2.0f;
         int color = findColor(senderName, layoutColor);
         mPaint.setColor(color);
         canvas.drawCircle(radius, radius, radius, mPaint);
         boolean needDarkText  = ColorUtils.calculateLuminance(color) > 0.5f;
         mTextPaint.setColor(needDarkText ? Color.BLACK : Color.WHITE);
         mTextPaint.setTextSize(symbol.length() == 1 ? mAvatarSize * 0.5f : mAvatarSize * 0.3f);
         int yPos = (int) (radius - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)) ;
         canvas.drawText(symbol, radius, yPos, mTextPaint);
         return Icon.createWithBitmap(bitmap);
     }

     private int findColor(CharSequence senderName, int layoutColor) {
         double luminance = NotificationColorUtil.calculateLuminance(layoutColor);
         float shift = Math.abs(senderName.hashCode()) % 5 / 4.0f - 0.5f;

         // we need to offset the range if the luminance is too close to the borders
         shift += Math.max(COLOR_SHIFT_AMOUNT / 2.0f / 100 - luminance, 0);
         shift -= Math.max(COLOR_SHIFT_AMOUNT / 2.0f / 100 - (1.0f - luminance), 0);
         return NotificationColorUtil.getShiftedColor(layoutColor,
                 (int) (shift * COLOR_SHIFT_AMOUNT));
     }

     private String findNameSplit(String existingName) {
         String[] split = existingName.split(" ");
         if (split.length > 1) {
             return Character.toString(split[0].charAt(0))
                     + Character.toString(split[1].charAt(0));
         }
         return existingName.substring(0, 1);
     }

     @RemotableViewMethod
     public void setLayoutColor(int color) {
         mLayoutColor = color;
     }

     @RemotableViewMethod
     public void setIsOneToOne(boolean oneToOne) {
         mIsOneToOne = oneToOne;
     }

     public void setUser(Person user) {
         mUser = user;
         if (mUser.getIcon() == null) {
             Icon userIcon = Icon.createWithResource(getContext(),
                     com.android.internal.R.drawable.messaging_user);
             userIcon.setTint(mLayoutColor);
             mUser = mUser.toBuilder().setIcon(userIcon).build();
         }
     }

     private void addMessagesToGroups(List<MessagingMessage> historicMessages,
             List<MessagingMessage> messages) {
         // Let's first find our groups!
         List<List<MessagingMessage>> groups = new ArrayList<>();
         List<Person> senders = new ArrayList<>();

         // Lets first find the groups
         findGroups(historicMessages, messages, groups, senders);

         // Let's now create the views and reorder them accordingly
         createGroupViews(groups, senders);
     }

     private void createGroupViews(List<List<MessagingMessage>> groups,
             List<Person> senders) {
         mGroups.clear();
         for (int groupIndex = 0; groupIndex < groups.size(); groupIndex++) {
             List<MessagingMessage> group = groups.get(groupIndex);
             MessagingGroup newGroup = null;
             // we'll just take the first group that exists or create one there is none
             for (int messageIndex = group.size() - 1; messageIndex >= 0; messageIndex--) {
                 MessagingMessage message = group.get(messageIndex);
                 newGroup = message.getGroup();
                 if (newGroup != null) {
                     break;
                 }
             }
             if (newGroup == null) {
                 newGroup = MessagingGroup.createGroup(mMessagingLinearLayout);
                 mAddedGroups.add(newGroup);
             }
             newGroup.setDisplayImagesAtEnd(mDisplayImagesAtEnd);
             newGroup.setLayoutColor(mLayoutColor);
             Person sender = senders.get(groupIndex);
             CharSequence nameOverride = null;
             if (sender != mUser && mNameReplacement != null) {
                 nameOverride = mNameReplacement;
             }
             newGroup.setSender(sender, nameOverride);
             mGroups.add(newGroup);

             if (mMessagingLinearLayout.indexOfChild(newGroup) != groupIndex) {
                 mMessagingLinearLayout.removeView(newGroup);
                 mMessagingLinearLayout.addView(newGroup, groupIndex);
             }
             newGroup.setMessages(group);
         }
     }

     private void findGroups(List<MessagingMessage> historicMessages,
             List<MessagingMessage> messages, List<List<MessagingMessage>> groups,
             List<Person> senders) {
         CharSequence currentSenderKey = null;
         List<MessagingMessage> currentGroup = null;
         int histSize = historicMessages.size();
         for (int i = 0; i < histSize + messages.size(); i++) {
             MessagingMessage message;
             if (i < histSize) {
                 message = historicMessages.get(i);
             } else {
                 message = messages.get(i - histSize);
             }
             boolean isNewGroup = currentGroup == null;
             Person sender = message.getMessage().getSenderPerson();
             CharSequence key = sender == null ? null
                     : sender.getKey() == null ? sender.getName() : sender.getKey();
             isNewGroup |= !TextUtils.equals(key, currentSenderKey);
             if (isNewGroup) {
                 currentGroup = new ArrayList<>();
                 groups.add(currentGroup);
                 if (sender == null) {
                     sender = mUser;
                 }
                 senders.add(sender);
                 currentSenderKey = key;
             }
             currentGroup.add(message);
         }
     }

     /**
      * Creates new messages, reusing existing ones if they are available.
      *
      * @param newMessages the messages to parse.
      */
     private List<MessagingMessage> createMessages(
             List<Notification.MessagingStyle.Message> newMessages, boolean historic) {
         List<MessagingMessage> result = new ArrayList<>();;
         for (int i = 0; i < newMessages.size(); i++) {
             Notification.MessagingStyle.Message m = newMessages.get(i);
             MessagingMessage message = findAndRemoveMatchingMessage(m);
             if (message == null) {
                 message = MessagingMessage.createMessage(this, m);
             }
             message.setIsHistoric(historic);
             result.add(message);
         }
         return result;
     }

     private MessagingMessage findAndRemoveMatchingMessage(Notification.MessagingStyle.Message m) {
         for (int i = 0; i < mMessages.size(); i++) {
             MessagingMessage existing = mMessages.get(i);
             if (existing.sameAs(m)) {
                 mMessages.remove(i);
                 return existing;
             }
         }
         for (int i = 0; i < mHistoricMessages.size(); i++) {
             MessagingMessage existing = mHistoricMessages.get(i);
             if (existing.sameAs(m)) {
                 mHistoricMessages.remove(i);
                 return existing;
             }
         }
         return null;
     }

     public void showHistoricMessages(boolean show) {
         mShowHistoricMessages = show;
         updateHistoricMessageVisibility();
     }

     private void updateHistoricMessageVisibility() {
         for (int i = 0; i < mHistoricMessages.size(); i++) {
             MessagingMessage existing = mHistoricMessages.get(i);
             existing.setVisibility(mShowHistoricMessages ? VISIBLE : GONE);
         }
     }

     @Override
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
         super.onLayout(changed, left, top, right, bottom);
         if (!mAddedGroups.isEmpty()) {
             getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
                 @Override
                 public boolean onPreDraw() {
                     for (MessagingGroup group : mAddedGroups) {
                         if (!group.isShown()) {
                             continue;
                         }
                         MessagingPropertyAnimator.fadeIn(group.getAvatar());
                         MessagingPropertyAnimator.fadeIn(group.getSenderView());
                         MessagingPropertyAnimator.startLocalTranslationFrom(group,
                                 group.getHeight(), LINEAR_OUT_SLOW_IN);
                     }
                     mAddedGroups.clear();
                     getViewTreeObserver().removeOnPreDrawListener(this);
                     return true;
                 }
             });
         }
     }

     public MessagingLinearLayout getMessagingLinearLayout() {
         return mMessagingLinearLayout;
     }

     public ArrayList<MessagingGroup> getMessagingGroups() {
         return mGroups;
     }
 }
	/*
	* 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.android.internal.widget;

	import android.annotation.AttrRes;
	import android.annotation.NonNull;
	import android.annotation.Nullable;
	import android.annotation.StyleRes;
	import android.app.Notification;
	import android.app.Person;
	import android.content.Context;
	import android.graphics.Bitmap;
	import android.graphics.Canvas;
	import android.graphics.Color;
	import android.graphics.Paint;
	import android.graphics.Rect;
	import android.graphics.drawable.Icon;
	import android.os.Bundle;
	import android.os.Parcelable;
	import android.text.TextUtils;
	import android.util.ArrayMap;
	import android.util.AttributeSet;
	import android.util.DisplayMetrics;
	import android.view.RemotableViewMethod;
	import android.view.ViewTreeObserver;
	import android.view.animation.Interpolator;
	import android.view.animation.PathInterpolator;
	import android.widget.FrameLayout;
	import android.widget.RemoteViews;
	import android.widget.TextView;

	import com.android.internal.R;
	import com.android.internal.graphics.ColorUtils;
	import com.android.internal.util.NotificationColorUtil;

	import java.util.ArrayList;
	import java.util.List;
	import java.util.function.Consumer;

	/**
	* A custom-built layout for the Notification.MessagingStyle allows dynamic addition and removal
	* messages and adapts the layout accordingly.
	*/
	@RemoteViews.RemoteView
	public class MessagingLayout extends FrameLayout {

	private static final float COLOR_SHIFT_AMOUNT = 60;
	private static final Consumer<MessagingMessage> REMOVE_MESSAGE
	= MessagingMessage::removeMessage;
	public static final Interpolator LINEAR_OUT_SLOW_IN = new PathInterpolator(0f, 0f, 0.2f, 1f);
	public static final Interpolator FAST_OUT_LINEAR_IN = new PathInterpolator(0.4f, 0f, 1f, 1f);
	public static final Interpolator FAST_OUT_SLOW_IN = new PathInterpolator(0.4f, 0f, 0.2f, 1f);
	public static final OnLayoutChangeListener MESSAGING_PROPERTY_ANIMATOR
	= new MessagingPropertyAnimator();
	private List<MessagingMessage> mMessages = new ArrayList<>();
	private List<MessagingMessage> mHistoricMessages = new ArrayList<>();
	private MessagingLinearLayout mMessagingLinearLayout;
	private boolean mShowHistoricMessages;
	private ArrayList<MessagingGroup> mGroups = new ArrayList<>();
	private TextView mTitleView;
	private int mLayoutColor;
	private int mAvatarSize;
	private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
	private Paint mTextPaint = new Paint();
	private CharSequence mConversationTitle;
	private Icon mLargeIcon;
	private boolean mIsOneToOne;
	private ArrayList<MessagingGroup> mAddedGroups = new ArrayList<>();
	private Person mUser;
	private CharSequence mNameReplacement;
	private boolean mDisplayImagesAtEnd;

	public MessagingLayout(@NonNull Context context) {
	super(context);
	}

	public MessagingLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
	super(context, attrs);
	}

	public MessagingLayout(@NonNull Context context, @Nullable AttributeSet attrs,
	@AttrRes int defStyleAttr) {
	super(context, attrs, defStyleAttr);
	}

	public MessagingLayout(@NonNull Context context, @Nullable AttributeSet attrs,
	@AttrRes int defStyleAttr, @StyleRes int defStyleRes) {
	super(context, attrs, defStyleAttr, defStyleRes);
	}

	@Override
	protected void onFinishInflate() {
	super.onFinishInflate();
	mMessagingLinearLayout = findViewById(R.id.notification_messaging);
	mMessagingLinearLayout.setMessagingLayout(this);
	// We still want to clip, but only on the top, since views can temporarily out of bounds
	// during transitions.
	DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
	Rect rect = new Rect(0, 0, displayMetrics.widthPixels, displayMetrics.heightPixels);
	mMessagingLinearLayout.setClipBounds(rect);
	mTitleView = findViewById(R.id.title);
	mAvatarSize = getResources().getDimensionPixelSize(R.dimen.messaging_avatar_size);
	mTextPaint.setTextAlign(Paint.Align.CENTER);
	mTextPaint.setAntiAlias(true);
	}

	@RemotableViewMethod
	public void setLargeIcon(Icon icon) {
	mLargeIcon = icon;
	}

	@RemotableViewMethod
	public void setNameReplacement(CharSequence nameReplacement) {
	mNameReplacement = nameReplacement;
	}

	@RemotableViewMethod
	public void setDisplayImagesAtEnd(boolean atEnd) {
	mDisplayImagesAtEnd = atEnd;
	}

	@RemotableViewMethod
	public void setData(Bundle extras) {
	Parcelable[] messages = extras.getParcelableArray(Notification.EXTRA_MESSAGES);
	List<Notification.MessagingStyle.Message> newMessages
	= Notification.MessagingStyle.Message.getMessagesFromBundleArray(messages);
	Parcelable[] histMessages = extras.getParcelableArray(Notification.EXTRA_HISTORIC_MESSAGES);
	List<Notification.MessagingStyle.Message> newHistoricMessages
	= Notification.MessagingStyle.Message.getMessagesFromBundleArray(histMessages);
	setUser(extras.getParcelable(Notification.EXTRA_MESSAGING_PERSON));
	mConversationTitle = null;
	TextView headerText = findViewById(R.id.header_text);
	if (headerText != null) {
	mConversationTitle = headerText.getText();
	}
	addRemoteInputHistoryToMessages(newMessages,
	extras.getCharSequenceArray(Notification.EXTRA_REMOTE_INPUT_HISTORY));
	bind(newMessages, newHistoricMessages);
	}

	private void addRemoteInputHistoryToMessages(
	List<Notification.MessagingStyle.Message> newMessages,
	CharSequence[] remoteInputHistory) {
	if (remoteInputHistory == null \|\| remoteInputHistory.length == 0) {
	return;
	}
	for (int i = remoteInputHistory.length - 1; i >= 0; i--) {
	CharSequence message = remoteInputHistory[i];
	newMessages.add(new Notification.MessagingStyle.Message(
	message, 0, (Person) null));
	}
	}

	private void bind(List<Notification.MessagingStyle.Message> newMessages,
	List<Notification.MessagingStyle.Message> newHistoricMessages) {

	List<MessagingMessage> historicMessages = createMessages(newHistoricMessages,
	true /* isHistoric */);
	List<MessagingMessage> messages = createMessages(newMessages, false /* isHistoric */);
	addMessagesToGroups(historicMessages, messages);

	// Let's remove the remaining messages
	mMessages.forEach(REMOVE_MESSAGE);
	mHistoricMessages.forEach(REMOVE_MESSAGE);

	mMessages = messages;
	mHistoricMessages = historicMessages;

	updateHistoricMessageVisibility();
	updateTitleAndNamesDisplay();
	}

	private void updateTitleAndNamesDisplay() {
	ArrayMap<CharSequence, String> uniqueNames = new ArrayMap<>();
	ArrayMap<Character, CharSequence> uniqueCharacters = new ArrayMap<>();
	for (int i = 0; i < mGroups.size(); i++) {
	MessagingGroup group = mGroups.get(i);
	CharSequence senderName = group.getSenderName();
	if (!group.needsGeneratedAvatar() \|\| TextUtils.isEmpty(senderName)) {
	continue;
	}
	if (!uniqueNames.containsKey(senderName)) {
	char c = senderName.charAt(0);
	if (uniqueCharacters.containsKey(c)) {
	// this character was already used, lets make it more unique. We first need to
	// resolve the existing character if it exists
	CharSequence existingName = uniqueCharacters.get(c);
	if (existingName != null) {
	uniqueNames.put(existingName, findNameSplit((String) existingName));
	uniqueCharacters.put(c, null);
	}
	uniqueNames.put(senderName, findNameSplit((String) senderName));
	} else {
	uniqueNames.put(senderName, Character.toString(c));
	uniqueCharacters.put(c, senderName);
	}
	}
	}

	// Now that we have the correct symbols, let's look what we have cached
	ArrayMap<CharSequence, Icon> cachedAvatars = new ArrayMap<>();
	for (int i = 0; i < mGroups.size(); i++) {
	// Let's now set the avatars
	MessagingGroup group = mGroups.get(i);
	boolean isOwnMessage = group.getSender() == mUser;
	CharSequence senderName = group.getSenderName();
	if (!group.needsGeneratedAvatar() \|\| TextUtils.isEmpty(senderName)
	\|\| (mIsOneToOne && mLargeIcon != null && !isOwnMessage)) {
	continue;
	}
	String symbol = uniqueNames.get(senderName);
	Icon cachedIcon = group.getAvatarSymbolIfMatching(senderName,
	symbol, mLayoutColor);
	if (cachedIcon != null) {
	cachedAvatars.put(senderName, cachedIcon);
	}
	}

	for (int i = 0; i < mGroups.size(); i++) {
	// Let's now set the avatars
	MessagingGroup group = mGroups.get(i);
	CharSequence senderName = group.getSenderName();
	if (!group.needsGeneratedAvatar() \|\| TextUtils.isEmpty(senderName)) {
	continue;
	}
	if (mIsOneToOne && mLargeIcon != null && group.getSender() != mUser) {
	group.setAvatar(mLargeIcon);
	} else {
	Icon cachedIcon = cachedAvatars.get(senderName);
	if (cachedIcon == null) {
	cachedIcon = createAvatarSymbol(senderName, uniqueNames.get(senderName),
	mLayoutColor);
	cachedAvatars.put(senderName, cachedIcon);
	}
	group.setCreatedAvatar(cachedIcon, senderName, uniqueNames.get(senderName),
	mLayoutColor);
	}
	}
	}

	public Icon createAvatarSymbol(CharSequence senderName, String symbol, int layoutColor) {
	Bitmap bitmap = Bitmap.createBitmap(mAvatarSize, mAvatarSize, Bitmap.Config.ARGB_8888);
	Canvas canvas = new Canvas(bitmap);
	float radius = mAvatarSize / 2.0f;
	int color = findColor(senderName, layoutColor);
	mPaint.setColor(color);
	canvas.drawCircle(radius, radius, radius, mPaint);
	boolean needDarkText = ColorUtils.calculateLuminance(color) > 0.5f;
	mTextPaint.setColor(needDarkText ? Color.BLACK : Color.WHITE);
	mTextPaint.setTextSize(symbol.length() == 1 ? mAvatarSize * 0.5f : mAvatarSize * 0.3f);
	int yPos = (int) (radius - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)) ;
	canvas.drawText(symbol, radius, yPos, mTextPaint);
	return Icon.createWithBitmap(bitmap);
	}

	private int findColor(CharSequence senderName, int layoutColor) {
	double luminance = NotificationColorUtil.calculateLuminance(layoutColor);
	float shift = Math.abs(senderName.hashCode()) % 5 / 4.0f - 0.5f;

	// we need to offset the range if the luminance is too close to the borders
	shift += Math.max(COLOR_SHIFT_AMOUNT / 2.0f / 100 - luminance, 0);
	shift -= Math.max(COLOR_SHIFT_AMOUNT / 2.0f / 100 - (1.0f - luminance), 0);
	return NotificationColorUtil.getShiftedColor(layoutColor,
	(int) (shift * COLOR_SHIFT_AMOUNT));
	}

	private String findNameSplit(String existingName) {
	String[] split = existingName.split(" ");
	if (split.length > 1) {
	return Character.toString(split[0].charAt(0))
	+ Character.toString(split[1].charAt(0));
	}
	return existingName.substring(0, 1);
	}

	@RemotableViewMethod
	public void setLayoutColor(int color) {
	mLayoutColor = color;
	}

	@RemotableViewMethod
	public void setIsOneToOne(boolean oneToOne) {
	mIsOneToOne = oneToOne;
	}

	public void setUser(Person user) {
	mUser = user;
	if (mUser.getIcon() == null) {
	Icon userIcon = Icon.createWithResource(getContext(),
	com.android.internal.R.drawable.messaging_user);
	userIcon.setTint(mLayoutColor);
	mUser = mUser.toBuilder().setIcon(userIcon).build();
	}
	}

	private void addMessagesToGroups(List<MessagingMessage> historicMessages,
	List<MessagingMessage> messages) {
	// Let's first find our groups!
	List<List<MessagingMessage>> groups = new ArrayList<>();
	List<Person> senders = new ArrayList<>();

	// Lets first find the groups
	findGroups(historicMessages, messages, groups, senders);

	// Let's now create the views and reorder them accordingly
	createGroupViews(groups, senders);
	}

	private void createGroupViews(List<List<MessagingMessage>> groups,
	List<Person> senders) {
	mGroups.clear();
	for (int groupIndex = 0; groupIndex < groups.size(); groupIndex++) {
	List<MessagingMessage> group = groups.get(groupIndex);
	MessagingGroup newGroup = null;
	// we'll just take the first group that exists or create one there is none
	for (int messageIndex = group.size() - 1; messageIndex >= 0; messageIndex--) {
	MessagingMessage message = group.get(messageIndex);
	newGroup = message.getGroup();
	if (newGroup != null) {
	break;
	}
	}
	if (newGroup == null) {
	newGroup = MessagingGroup.createGroup(mMessagingLinearLayout);
	mAddedGroups.add(newGroup);
	}
	newGroup.setDisplayImagesAtEnd(mDisplayImagesAtEnd);
	newGroup.setLayoutColor(mLayoutColor);
	Person sender = senders.get(groupIndex);
	CharSequence nameOverride = null;
	if (sender != mUser && mNameReplacement != null) {
	nameOverride = mNameReplacement;
	}
	newGroup.setSender(sender, nameOverride);
	mGroups.add(newGroup);

	if (mMessagingLinearLayout.indexOfChild(newGroup) != groupIndex) {
	mMessagingLinearLayout.removeView(newGroup);
	mMessagingLinearLayout.addView(newGroup, groupIndex);
	}
	newGroup.setMessages(group);
	}
	}

	private void findGroups(List<MessagingMessage> historicMessages,
	List<MessagingMessage> messages, List<List<MessagingMessage>> groups,
	List<Person> senders) {
	CharSequence currentSenderKey = null;
	List<MessagingMessage> currentGroup = null;
	int histSize = historicMessages.size();
	for (int i = 0; i < histSize + messages.size(); i++) {
	MessagingMessage message;
	if (i < histSize) {
	message = historicMessages.get(i);
	} else {
	message = messages.get(i - histSize);
	}
	boolean isNewGroup = currentGroup == null;
	Person sender = message.getMessage().getSenderPerson();
	CharSequence key = sender == null ? null
	: sender.getKey() == null ? sender.getName() : sender.getKey();
	isNewGroup \|= !TextUtils.equals(key, currentSenderKey);
	if (isNewGroup) {
	currentGroup = new ArrayList<>();
	groups.add(currentGroup);
	if (sender == null) {
	sender = mUser;
	}
	senders.add(sender);
	currentSenderKey = key;
	}
	currentGroup.add(message);
	}
	}

	/**
	* Creates new messages, reusing existing ones if they are available.
	*
	* @param newMessages the messages to parse.
	*/
	private List<MessagingMessage> createMessages(
	List<Notification.MessagingStyle.Message> newMessages, boolean historic) {
	List<MessagingMessage> result = new ArrayList<>();;
	for (int i = 0; i < newMessages.size(); i++) {
	Notification.MessagingStyle.Message m = newMessages.get(i);
	MessagingMessage message = findAndRemoveMatchingMessage(m);
	if (message == null) {
	message = MessagingMessage.createMessage(this, m);
	}
	message.setIsHistoric(historic);
	result.add(message);
	}
	return result;
	}

	private MessagingMessage findAndRemoveMatchingMessage(Notification.MessagingStyle.Message m) {
	for (int i = 0; i < mMessages.size(); i++) {
	MessagingMessage existing = mMessages.get(i);
	if (existing.sameAs(m)) {
	mMessages.remove(i);
	return existing;
	}
	}
	for (int i = 0; i < mHistoricMessages.size(); i++) {
	MessagingMessage existing = mHistoricMessages.get(i);
	if (existing.sameAs(m)) {
	mHistoricMessages.remove(i);
	return existing;
	}
	}
	return null;
	}

	public void showHistoricMessages(boolean show) {
	mShowHistoricMessages = show;
	updateHistoricMessageVisibility();
	}

	private void updateHistoricMessageVisibility() {
	for (int i = 0; i < mHistoricMessages.size(); i++) {
	MessagingMessage existing = mHistoricMessages.get(i);
	existing.setVisibility(mShowHistoricMessages ? VISIBLE : GONE);
	}
	}

	@Override
	protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
	super.onLayout(changed, left, top, right, bottom);
	if (!mAddedGroups.isEmpty()) {
	getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
	@Override
	public boolean onPreDraw() {
	for (MessagingGroup group : mAddedGroups) {
	if (!group.isShown()) {
	continue;
	}
	MessagingPropertyAnimator.fadeIn(group.getAvatar());
	MessagingPropertyAnimator.fadeIn(group.getSenderView());
	MessagingPropertyAnimator.startLocalTranslationFrom(group,
	group.getHeight(), LINEAR_OUT_SLOW_IN);
	}
	mAddedGroups.clear();
	getViewTreeObserver().removeOnPreDrawListener(this);
	return true;
	}
	});
	}
	}

	public MessagingLinearLayout getMessagingLinearLayout() {
	return mMessagingLinearLayout;
	}

	public ArrayList<MessagingGroup> getMessagingGroups() {
	return mGroups;
	}
	}