Emoji colors look faded. Emoji颜色发灰的解决办法

EmojiTextView.java

import android.content.Context;
import android.text.InputFilter;
import android.util.AttributeSet;

import androidx.annotation.Nullable;
import androidx.appcompat.widget.AppCompatTextView;
import androidx.emoji.widget.EmojiTextViewHelper;

/**
 * 变更构建器里 init 方法的调用顺序
 * 不这么搞下，颜色发灰！看官方的截图就能明白。
 * @see https://github.com/googlesamples/android-EmojiCompat/blob/master/screenshots/1-main.png
 * @see androidx.emoji.widget.EmojiTextView
 * Created by clxy on 2017/12/01.
 */
public class EmojiTextView extends AppCompatTextView {
    private EmojiTextViewHelper mEmojiTextViewHelper;
    /**
     * Prevent calling {@link #init()} multiple times in case super() constructors
     * call other constructors.
     */
    private boolean mInitialized;

    public EmojiTextView(Context context) {
        // super(context);
        // init();
        this(context, null);
    }

    public EmojiTextView(Context context, @Nullable AttributeSet attrs) {
        // super(context, attrs);
        // init();
        this(context, attrs, 0);
    }

    public EmojiTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        if (!mInitialized) {
            mInitialized = true;
            getEmojiTextViewHelper().updateTransformationMethod();
        }
    }

    @Override
    public void setFilters(InputFilter[] filters) {
        super.setFilters(getEmojiTextViewHelper().getFilters(filters));
    }

    @Override
    public void setAllCaps(boolean allCaps) {
        super.setAllCaps(allCaps);
        getEmojiTextViewHelper().setAllCaps(allCaps);
    }

    private EmojiTextViewHelper getEmojiTextViewHelper() {
        if (mEmojiTextViewHelper == null) {
            mEmojiTextViewHelper = new EmojiTextViewHelper(this);
        }
        return mEmojiTextViewHelper;
    }
}