Emoji Picker
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The Emoji Picker is a UI solution that offers a modern look and feel, up-to-date emoji, and ease of use. Users can browse and select emoji and their variants or choose from their recently-used emoji.

Figure 1. Emoji Picker

With this library, apps from a variety of sources can provide an inclusive and unified emoji experience to their users without developers having to build and maintain their own emoji picker from scratch.

Features

The Emoji Picker has the following features.

Up-to-date emoji

Newly-released emoji are selectively included in the Emoji Picker. The Emoji Picker library is compatible across multiple Android versions and devices.

Sticky variants

Long-press an emoji to display a menu of variants, such as different genders or skin tones. The variant you choose is saved in the Emoji Picker, and the last selected variant is used in the main panel.

With this feature, users can send their preferred emoji variants with one tap.

Recent emoji

The RecentEmojiProvider is responsible for providing emoji in the Recently Used category. The library has a default recent emoji provider that satisfies the most common use case:

All selected emoji are saved per-app in shared preferences.
The picker displays at most three rows of selected emoji, deduped, in reverse chronological order.

If this default behavior is sufficient, then you don't need to use setRecentEmojiProvider().

You might need to customize the provider behavior, however. Here are some common scenarios:

You want to store different selected emoji per user account.
You want to use data storage other than shared preferences.
You want to display recent emoji sorted by frequency.

You can then implement the RecentEmojiProvider interface and set it using setRecentEmojiProvider().

Direction selector

Starting with Emoji 15.1, the Emoji Picker supports bidirectional emoji. Users can tap on the bidirectional switcher to toggle between left- and right-facing versions of emoji.

Figure 4. Bidirectional emoji facing left.

Figure 5. Bidirectional emoji facing right.

Multi-person emoji selector

Users can touch and hold emoji couples to reveal multi-person emoji selections.

Figure 6. Touch and hold an emoji couple to reveal multi-person emoji selections.

Figure 7. Select a left-half emoji person.

Figure 8. Select a right-half emoji person.

When the user selects the left- or right-half emoji person of an emoji couple, the selector displays a preview on the bottom-right, as shown in figures 7 and 8. After selecting both halves of the emoji couple, users can select the preview to compose the custom emoji couple.

Compatibility with `EmojiCompat`

If enabled, an EmojiCompat instance is used in the Emoji Picker to render as many emoji as possible. The Emoji Picker doesn't require EmojiCompat, however.

Prerequisites

Your app must target Android 5.0 (API level 21) or higher.

Use the library

Import androidx.emoji2:emojipicker:$version in your app's build.gradle file.

dependencies {
    implementation "androidx.emoji2:emojipicker:$version"
}

Inflate the Emoji Picker view, and optionally set emojiGridRows and emojiGridColumns.

The default number of emojiGridColumns is 9.
Row count is calculated based on the parent view height and the value of emojiGridColumns.
Use a float value for emojiGridRows to indicate that the user can scroll for more emoji.

<androidx.emoji2.emojipicker.EmojiPickerView
    android:id="@+id/emoji_picker"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:emojiGridColumns="9" />

val emojiPickerView = EmojiPickerView(context).apply {
    emojiGridColumns = 15
    layoutParams = ViewGroup.LayoutParams(
        ViewGroup.LayoutParams.MATCH_PARENT,
        ViewGroup.LayoutParams.MATCH_PARENT
    )
}

findViewById<ViewGroup>(R.id.emoji_picker_layout).addView(emojiPickerView)

Use setOnEmojiPickedListener() to append the selected emoji to a view. For example, to append to an EditText, do the following:
```
emojiPickerView.setOnEmojiPickedListener {
    findViewById<EditText>(R.id.edit_text).append(it.emoji)
}
```
Optionally set RecentEmojiProvider, see sample app for an example implementation.

Optionally customize styles. Create your own style to override common theme attributes and apply the style to the EmojiPickerView. For example, overriding colorControlNormal changes the category icon color.

<style name="CustomStyle" >
    <item name="colorControlNormal">#FFC0CB</item>
</style>
<androidx.emoji2.emojipicker.EmojiPickerView
    android:id="@+id/emoji_picker"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:theme="@style/CustomStyle"
    app:emojiGridColumns="9" />

Sample App

The Emoji Picker sample app demonstrates basic use cases along with the following additional scenarios:

Layout recalculation when emojiGridRows or emojiGridColumns are reset.
An overridden recent emoji provider that sorts by frequency.
Additional style customization.

Emoji Picker Stay organized with collections Save and categorize content based on your preferences.