Android仿写微信聊天界面，用代码实现

非常感谢您的提问，以下是实现 Android仿写微信聊天界面的代码：

1. 首先，我们需要在布局文件中添加一个 RecyclerView，用于显示聊天记录：

<androidx.recyclerview.widget.RecyclerView
android:id="@+id/chat_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:scrollbars="vertical"
app:layoutManager="LinearLayoutManager"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent" />

2. 然后，我们需要创建一个 ChatAdapter 类，用于管理聊天记录的显示：

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

private List<ChatMessage> mChatMessages;

public ChatAdapter(List<ChatMessage> chatMessages) {
mChatMessages = chatMessages;
}

@Override
public int getItemViewType(int position) {
ChatMessage chatMessage = mChatMessages.get(position);
return chatMessage.getType();
}

@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if (viewType == ChatMessage.TYPE_SEND) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_chat_send, parent, false);
return new SendViewHolder(view);
} else {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_chat_receive, parent, false);
return new ReceiveViewHolder(view);
}
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
ChatMessage chatMessage = mChatMessages.get(position);
if (holder instanceof SendViewHolder) {
((SendViewHolder) holder).mSendContentTextView.setText(chatMessage.getContent());
} else {
((ReceiveViewHolder) holder).mReceiveContentTextView.setText(chatMessage.getContent());
}
}

@Override
public int getItemCount() {
return mChatMessages.size();
}

static class SendViewHolder extends RecyclerView.ViewHolder {

TextView mSendContentTextView;

SendViewHolder(@NonNull View itemView) {
super(itemView);
mSendContentTextView = itemView.findViewById(R.id.tv_send_content);
}
}

static class ReceiveViewHolder extends RecyclerView.ViewHolder {

TextView mReceiveContentTextView;

ReceiveViewHolder(@NonNull View itemView) {
super(itemView);
mReceiveContentTextView = itemView.findViewById(R.id.tv_receive_content);
}
}
}

3. 接下来，我们需要创建一个 ChatMessage 类，用于存储聊天记录的信息：

public class ChatMessage {

public static final int TYPE_SEND = 0;
public static final int TYPE_RECEIVE = 1;

private int mType;
private String mContent;

public ChatMessage(int type, String content) {
mType = type;
mContent = content;
}

public int getType() {
return mType;
}

public String getContent() {
return mContent;
}
}

4. 最后，我们需要在 Activity 中初始化 RecyclerView 和 ChatAdapter，并添加聊天记录：

public class ChatActivity extends AppCompatActivity {

private RecyclerView mChatRecyclerView;
private ChatAdapter mChatAdapter;
private List<ChatMessage> mChatMessages = new ArrayList<>();

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

mChatRecyclerView = findViewById(R.id.chat_recycler_view);
mChatAdapter = new ChatAdapter(mChatMessages);
mChatRecyclerView.setAdapter(mChatAdapter);

// 添加聊天记录
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_RECEIVE, "你好，我是小明。"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_SEND, "你好，我是小红。"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_RECEIVE, "很高兴认识你。"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_SEND, "我也很高兴认识你。"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_RECEIVE, "你喜欢什么样的音乐？"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_SEND, "我喜欢流行音乐。"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_RECEIVE, "我也喜欢流行音乐。"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_SEND, "我们有共同的爱好。"));
mChatMessages.add(new ChatMessage(ChatMessage.TYPE_RECEIVE, "是的，我们可以一起听歌。"));

// 刷新聊天记录
mChatAdapter.notifyDataSetChanged();
}
}

希望这份代码能够帮助到您，如果您有任何问题，请随时联系我。