MainActivity.java

package com.simple2;

import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.Spannable;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;

import com.sj.emoji.DefEmoticons;
import com.sj.emoji.EmojiBean;
import com.sj.emoji.EmojiDisplay;
import com.sj.emoji.EmojiSpan;

import java.util.ArrayList;
import java.util.Collections;
import java.util.regex.Matcher;

import sj.keyboard.XhsEmoticonsKeyBoard;
import sj.keyboard.adpater.EmoticonsAdapter;
import sj.keyboard.adpater.PageSetAdapter;
import sj.keyboard.data.EmoticonPageEntity;
import sj.keyboard.data.EmoticonPageSetEntity;
import sj.keyboard.interfaces.EmoticonClickListener;
import sj.keyboard.interfaces.EmoticonDisplayListener;
import sj.keyboard.interfaces.EmoticonFilter;
import sj.keyboard.interfaces.PageViewInstantiateListener;
import sj.keyboard.utils.EmoticonsKeyboardUtils;
import sj.keyboard.widget.EmoticonPageView;

public class MainActivity extends AppCompatActivity {

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

        final XhsEmoticonsKeyBoard ek_bar = (XhsEmoticonsKeyBoard) findViewById(R.id.ek_bar);

        // source data
        ArrayList<EmojiBean> emojiArray = new ArrayList<>();
        Collections.addAll(emojiArray, DefEmoticons.getDefEmojiArray());

        // emoticon click
        final EmoticonClickListener emoticonClickListener = new EmoticonClickListener() {
            @Override
            public void onEmoticonClick(Object o, int actionType, boolean isDelBtn) {
                if (isDelBtn) {
                    int action = KeyEvent.ACTION_DOWN;
                    int code = KeyEvent.KEYCODE_DEL;
                    KeyEvent event = new KeyEvent(action, code);
                    ek_bar.getEtChat().onKeyDown(KeyEvent.KEYCODE_DEL, event);
                } else {
                    if (o == null) {
                        return;
                    }
                    String content = null;
                    if (o instanceof EmojiBean) {
                        content = ((EmojiBean) o).emoji;
                    }
                    int index = ek_bar.getEtChat().getSelectionStart();
                    Editable editable = ek_bar.getEtChat().getText();
                    editable.insert(index, content);
                }
            }
        };

        // emoticon instantiate
        final EmoticonDisplayListener emoticonDisplayListener = new EmoticonDisplayListener() {
            @Override
            public void onBindView(int i, ViewGroup viewGroup, EmoticonsAdapter.ViewHolder viewHolder, Object object, final boolean isDelBtn) {
                final EmojiBean emojiBean = (EmojiBean) object;
                if (emojiBean == null && !isDelBtn) {
                    return;
                }

                viewHolder.ly_root.setBackgroundResource(com.keyboard.view.R.drawable.bg_emoticon);

                if (isDelBtn) {
                    viewHolder.iv_emoticon.setImageResource(R.mipmap.icon_del);
                } else {
                    viewHolder.iv_emoticon.setImageResource(emojiBean.icon);
                }

                viewHolder.rootView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        emoticonClickListener.onEmoticonClick(emojiBean, 0, isDelBtn);
                    }
                });
            }
        };

        //  page instantiate
        PageViewInstantiateListener pageViewInstantiateListener = new PageViewInstantiateListener<EmoticonPageEntity>() {
            @Override
            public View instantiateItem(ViewGroup viewGroup, int i, EmoticonPageEntity pageEntity) {
                if (pageEntity.getRootView() == null) {
                    EmoticonPageView pageView = new EmoticonPageView(viewGroup.getContext());
                    pageView.setNumColumns(pageEntity.getRow());
                    pageEntity.setRootView(pageView);
                    try {
                        EmoticonsAdapter adapter = new EmoticonsAdapter(viewGroup.getContext(), pageEntity, null);
                        // emoticon instantiate
                        adapter.setOnDisPlayListener(emoticonDisplayListener);
                        pageView.getEmoticonsGridView().setAdapter(adapter);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                return pageEntity.getRootView();
            }
        };

        // build
        EmoticonPageSetEntity xhsPageSetEntity
                = new EmoticonPageSetEntity.Builder()
                .setLine(3)
                .setRow(7)
                .setEmoticonList(emojiArray)
                .setIPageViewInstantiateItem(pageViewInstantiateListener)
                .setShowDelBtn(EmoticonPageEntity.DelBtnStatus.LAST)
                .setIconUri(R.mipmap.ic_launcher)
                .build();

        PageSetAdapter pageSetAdapter = new PageSetAdapter();
        pageSetAdapter.add(xhsPageSetEntity);
        ek_bar.setAdapter(pageSetAdapter);


        class EmojiFilter extends EmoticonFilter {

            private int emojiSize = -1;

            @Override
            public void filter(EditText editText, CharSequence text, int start, int lengthBefore, int lengthAfter) {
                emojiSize = emojiSize == -1 ? EmoticonsKeyboardUtils.getFontHeight(editText) : emojiSize;
                clearSpan(editText.getText(), start, text.toString().length());
                Matcher m = EmojiDisplay.getMatcher(text.toString().substring(start, text.toString().length()));
                if (m != null) {
                    while (m.find()) {
                        String emojiHex = Integer.toHexString(Character.codePointAt(m.group(), 0));
                        Drawable drawable = getDrawable(editText.getContext(), EmojiDisplay.HEAD_NAME + emojiHex);
                        if(drawable != null) {
                            int itemHeight;
                            int itemWidth;
                            if(emojiSize == EmojiDisplay.WRAP_DRAWABLE) {
                                itemHeight = drawable.getIntrinsicHeight();
                                itemWidth = drawable.getIntrinsicWidth();
                            } else {
                                itemHeight = emojiSize;
                                itemWidth = emojiSize;
                            }

                            drawable.setBounds(0, 0, itemHeight, itemWidth);
                            EmojiSpan imageSpan = new EmojiSpan(drawable);
                            editText.getText().setSpan(imageSpan, start + m.start(), start + m.end(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
                        }
                    }
                }
            }

            private void clearSpan(Spannable spannable, int start, int end) {
                if (start == end) {
                    return;
                }
                EmojiSpan[] oldSpans = spannable.getSpans(start, end, EmojiSpan.class);
                for (int i = 0; i < oldSpans.length; i++) {
                    spannable.removeSpan(oldSpans[i]);
                }
            }
        }
        // add a filter
        ek_bar.getEtChat().addEmoticonFilter(new EmojiFilter());
    }
}