fedilab-Android-App/app/src/common/java/app/fedilab/android/imageeditor/StickerBSFragment.java

package app.fedilab.android.imageeditor;

import android.annotation.SuppressLint;
import android.app.Dialog;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.google.android.material.bottomsheet.BottomSheetBehavior;
import com.google.android.material.bottomsheet.BottomSheetDialogFragment;

import org.jetbrains.annotations.NotNull;

import app.fedilab.android.R;

public class StickerBSFragment extends BottomSheetDialogFragment {

    private StickerListener mStickerListener;
    private BottomSheetBehavior.BottomSheetCallback mBottomSheetBehaviorCallback = new BottomSheetBehavior.BottomSheetCallback() {

        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_HIDDEN) {
                dismiss();
            }

        }

        @Override
        public void onSlide(@NonNull View bottomSheet, float slideOffset) {
        }
    };

    public StickerBSFragment() {
        // Required empty public constructor
    }

    public void setStickerListener(StickerListener stickerListener) {
        mStickerListener = stickerListener;
    }

    @SuppressLint("RestrictedApi")
    @Override
    public void setupDialog(@NotNull Dialog dialog, int style) {
        super.setupDialog(dialog, style);
        View contentView = View.inflate(getContext(), R.layout.fragment_bottom_sticker_emoji_dialog, null);
        dialog.setContentView(contentView);
        CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) ((View) contentView.getParent()).getLayoutParams();
        CoordinatorLayout.Behavior behavior = params.getBehavior();

        if (behavior instanceof BottomSheetBehavior) {
            ((BottomSheetBehavior) behavior).setBottomSheetCallback(mBottomSheetBehaviorCallback);
        }
        ((View) contentView.getParent()).setBackgroundColor(getResources().getColor(android.R.color.transparent));
        RecyclerView rvEmoji = contentView.findViewById(R.id.rvEmoji);

        GridLayoutManager gridLayoutManager = new GridLayoutManager(getActivity(), 3);
        rvEmoji.setLayoutManager(gridLayoutManager);
        StickerAdapter stickerAdapter = new StickerAdapter();
        rvEmoji.setAdapter(stickerAdapter);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

    }

    @SuppressWarnings("unused")
    private String convertEmoji(String emoji) {
        String returnedEmoji = "";
        try {
            int convertEmojiToInt = Integer.parseInt(emoji.substring(2), 16);
            returnedEmoji = getEmojiByUnicode(convertEmojiToInt);
        } catch (NumberFormatException e) {
            returnedEmoji = "";
        }
        return returnedEmoji;
    }

    private String getEmojiByUnicode(int unicode) {
        return new String(Character.toChars(unicode));
    }

    public interface StickerListener {
        void onStickerClick(Bitmap bitmap);
    }

    public class StickerAdapter extends RecyclerView.Adapter<StickerAdapter.ViewHolder> {

        int[] stickerList = new int[]{
                R.drawable.bubble1,
                R.drawable.cat1,
                R.drawable.cat2,
                R.drawable.cat3,
                R.drawable.cat4,
                R.drawable.cat5,
                R.drawable.dog1,
                R.drawable.dog2,
                R.drawable.flower1,
                R.drawable.flower2,
                R.drawable.sun,
                R.drawable.tux1,

        };

        @NotNull
        @Override
        public ViewHolder onCreateViewHolder(@NotNull ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_sticker, parent, false);
            return new ViewHolder(view);
        }

        @Override
        public void onBindViewHolder(@NotNull ViewHolder holder, int position) {
            holder.imgSticker.setImageResource(stickerList[position]);
        }

        @Override
        public int getItemCount() {
            return stickerList.length;
        }

        class ViewHolder extends RecyclerView.ViewHolder {
            ImageView imgSticker;

            ViewHolder(View itemView) {
                super(itemView);
                imgSticker = itemView.findViewById(R.id.imgSticker);

                itemView.setOnClickListener(v -> {
                    if (mStickerListener != null) {
                        mStickerListener.onStickerClick(
                                BitmapFactory.decodeResource(getResources(),
                                        stickerList[getLayoutPosition()]));
                    }
                    dismiss();
                });
            }
        }
    }
}