118 lines
3.5 KiB
Java
118 lines
3.5 KiB
Java
package org.mercury_im.messenger.ui.chat;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.TextView;
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import androidx.annotation.NonNull;
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import androidx.recyclerview.widget.RecyclerView;
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import org.mercury_im.messenger.R;
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import org.mercury_im.messenger.persistence.model.MessageModel;
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import java.util.ArrayList;
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import java.util.List;
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public class ChatRecyclerViewAdapter extends RecyclerView.Adapter<ChatRecyclerViewAdapter.ChatItemViewHolder> {
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private List<MessageModel> messages = new ArrayList<>();
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public ChatRecyclerViewAdapter() {
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}
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public void updateMessages(List<MessageModel> messages) {
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this.messages.clear();
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this.messages.addAll(messages);
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notifyDataSetChanged();
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}
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@NonNull
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@Override
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public ChatItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
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return new ChatItemViewHolder(LayoutInflater.from(parent.getContext()).inflate(viewType, parent, false));
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}
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@Override
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public void onBindViewHolder(@NonNull ChatItemViewHolder holder, int position) {
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MessageModel message = messages.get(position);
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MessageBackgroundDrawable background = getBackgroundDrawable(position);
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if (message.isIncoming()) {
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holder.body.setBackgroundResource(background.getIn());
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} else {
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holder.body.setBackgroundResource(background.getOut());
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}
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holder.body.setText(message.getBody());
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holder.body.requestLayout();
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}
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@Override
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public int getItemViewType(int position) {
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if (messages.get(position).isIncoming()) {
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return R.layout.view_message_text_in;
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} else {
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return R.layout.view_message_text_out;
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}
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}
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@Override
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public int getItemCount() {
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return messages.size();
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}
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public class ChatItemViewHolder extends RecyclerView.ViewHolder {
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private TextView body;
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public ChatItemViewHolder(@NonNull View itemView) {
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super(itemView);
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body = itemView.findViewById(R.id.msg_body);
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}
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}
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enum MessageBackgroundDrawable {
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FIRST(R.drawable.bg_msg_in_first, R.drawable.bg_msg_out_first),
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MID(R.drawable.bg_msg_in_mid, R.drawable.bg_msg_out_mid),
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LAST(R.drawable.bg_msg_in_last, R.drawable.bg_msg_out_last),
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SINGLE(R.drawable.bg_msg_single, R.drawable.bg_msg_single),
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;
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private final int in, out;
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MessageBackgroundDrawable(int in, int out) {
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this.in = in;
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this.out = out;
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}
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public int getIn() {
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return in;
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}
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public int getOut() {
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return out;
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}
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}
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public MessageBackgroundDrawable getBackgroundDrawable(int pos) {
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MessageModel m = messages.get(pos);
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MessageModel b = pos != 0 ? messages.get(pos - 1) : null;
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MessageModel a = pos != messages.size() - 1 ? messages.get(pos + 1) : null;
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if (b == null || b.isIncoming() != m.isIncoming()) {
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if (a == null || a.isIncoming() != m.isIncoming()) {
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return MessageBackgroundDrawable.SINGLE;
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} else {
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return MessageBackgroundDrawable.FIRST;
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}
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} else {
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if (a == null || a.isIncoming() != m.isIncoming()) {
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return MessageBackgroundDrawable.LAST;
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} else {
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return MessageBackgroundDrawable.MID;
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}
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}
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}
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}
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