ChatAPP --- 好友聊天

一，简介在局域网内，使用IP的点对点通信，使用socket进行TCP/IP协议通信，并使用此协议进行文件传输，因为大家都在局域网内，不容易丢失通信包，所以不使用UDP协议。


二，原理
发送端：向另一台手机发送信息----并显示在屏幕上
接收端：接收另一台手机发过来的信息----并显示在屏幕上

三，布局
主布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/mainlayout"tools:context=".activitys.ChatActivity"><RelativeLayoutandroid:id="@+id/relate"android:layout_width="match_parent"android:layout_height="40dp"android:layout_margin="14dp"android:layout_alignParentBottom="true"><Buttonandroid:id="@+id/sendfile"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_centerVertical="true"android:text="@string/sendfile"/><Buttonandroid:id="@+id/send"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerVertical="true"android:layout_toLeftOf="@id/sendfile"android:text="@string/send"/><EditTextandroid:id="@+id/et"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_toLeftOf="@+id/send"android:layout_marginRight="5dp"/></RelativeLayout><android.support.v7.widget.RecyclerViewandroid:id="@+id/recycler_view"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_above="@+id/relate"android:layout_marginTop="25dp"android:layout_marginLeft="14dp"android:layout_marginRight="14dp"/></RelativeLayout>

ChatAdapter适配器布局
chat_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".activitys.ChatActivity"><RelativeLayoutandroid:id="@+id/relate_1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:visibility="gone"><ImageViewandroid:id="@+id/icon1"android:layout_width="50dp"android:layout_height="50dp"android:src="@mipmap/head"android:layout_centerVertical="true"/><ImageViewandroid:id="@+id/file_icon1"android:layout_width="100dp"android:layout_height="100dp"android:src="@mipmap/ic_launcher"android:layout_toRightOf="@+id/icon1"android:layout_marginLeft="10dp"/><TextViewandroid:id="@+id/tv1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginLeft="10dp"android:text="对方"android:textSize="15sp"android:layout_centerVertical="true"android:layout_toRightOf="@+id/icon1"android:visibility="gone"/></RelativeLayout><RelativeLayoutandroid:id="@+id/relate_2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_below="@+id/relate_1"android:visibility="gone"><ImageViewandroid:id="@+id/icon2"android:layout_width="50dp"android:layout_height="50dp"android:src="@mipmap/head"android:layout_alignParentRight="true"android:layout_centerVertical="true"/><ImageViewandroid:id="@+id/file_icon2"android:layout_width="100dp"android:layout_height="100dp"android:src="@mipmap/ic_launcher"android:layout_toLeftOf="@+id/icon2"android:layout_centerVertical="true"android:layout_marginRight="10dp"/><TextViewandroid:id="@+id/tv2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="自己"android:textSize="15sp"android:layout_toLeftOf="@+id/icon2"android:layout_centerVertical="true"android:layout_marginRight="10dp"android:visibility="gone"/></RelativeLayout></RelativeLayout>

发送端布局

/*** 发送聊天语句*/@OnClick(R.id.send)public void Send(){send_str = et.getText().toString().trim();if (!send_str.isEmpty()){Chat chat = new Chat();chat.setId(1);chat.setTalk(send_str);chat.setFiletype(getString(R.string.talk));chats.add(chat);chatAdapter.notifyDataSetChanged();//自动滑到最底端mRecycle.scrollToPosition(chatAdapter.getItemCount()-1);Thread thread = new Thread(){@Overridepublic void run() {super.run();try {sockets = new Socket(ip_diu,8000);outputStream = sockets.getOutputStream();byte[] buffer = TalkUtil.CreateJson(getString(R.string.talk) , send_str);outputStream.write(buffer);} catch (IOException e) {e.printStackTrace();}}};thread.start();}else {Toast.makeText(this,R.string.send_ok , Toast.LENGTH_SHORT).show();}}

接收端

  public class  MyReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {String msg = intent.getStringExtra("msg");String type;try {JSONObject jsonObject = new JSONObject(msg);type = jsonObject.getString(Constant.type_key);if (type.equals(getString(R.string.talk))){msg = jsonObject.getString(Constant.talk_key);Chat chat = new Chat();chat.setId(-1);chat.setTalk(msg);chat.setFiletype(type);chats.add(chat);chatAdapter.notifyDataSetChanged();}else if (type.equals(getString(R.string.file))){msg = jsonObject.getString(Constant.talk_key);Chat chat = new Chat();chat.setId(-1);chat.setTalk(msg);chat.setFiletype(type);chats.add(chat);chatAdapter.notifyDataSetChanged();}mRecycle.scrollToPosition(chatAdapter.getItemCount()-1);}catch (JSONException e){e.printStackTrace();}}}

适配器

package com.peng.linchat.adapter;import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;import com.peng.linchat.R;
import com.peng.linchat.bean.Chat;
import com.peng.linchat.util.StringUtil;import java.util.List;public class ChatAdapter  extends RecyclerView.Adapter<ChatAdapter.ViewHolder> {private Context mContext;private List<Chat> chats;/*** 构造函数，传入数据* @param mContext* @param friends*/public ChatAdapter(Context mContext, List<Chat> friends) {this.mContext = mContext;this.chats = friends;}/*** 设置holder*/static class ViewHolder extends RecyclerView.ViewHolder {public TextView ch_1 , ch_2 ;public ImageView icon_1 , icon_2 , file_icon_1 , file_icon_2;public RelativeLayout relativeLayout_1 , relativeLayout_2;public ViewHolder(View itemView) {super(itemView);ch_1 = (TextView) itemView.findViewById(R.id.tv1);ch_2 = (TextView) itemView.findViewById(R.id.tv2);icon_1 = (ImageView) itemView.findViewById(R.id.icon1);icon_2 = (ImageView) itemView.findViewById(R.id.icon2);file_icon_1 = (ImageView) itemView.findViewById(R.id.file_icon1);file_icon_2 = (ImageView) itemView.findViewById(R.id.file_icon2);relativeLayout_1 = (RelativeLayout) itemView.findViewById(R.id.relate_1);relativeLayout_2 = (RelativeLayout) itemView.findViewById(R.id.relate_2);}}@NonNull@Overridepublic ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.chat_item , null);ViewHolder viewHolder = new ViewHolder(view);return viewHolder;}/*** 更新对话框时的显示* @param holder* @param position*/@Overridepublic void onBindViewHolder(@NonNull ViewHolder holder, int position) {Chat chat = chats.get(position);if (chat.getId() == -1){holder.relativeLayout_1.setVisibility(View.VISIBLE);holder.relativeLayout_2.setVisibility(View.GONE);if (chat.getFiletype().equals(mContext.getString(R.string.talk))){holder.ch_1.setVisibility(View.VISIBLE);holder.ch_1.setText(chat.getTalk());holder.file_icon_1.setVisibility(View.GONE);}else{holder.ch_1.setVisibility(View.GONE);holder.file_icon_1.setVisibility(View.VISIBLE);String filename = chat.getTalk();holder.file_icon_1.setImageResource(StringUtil.geticonid(filename));}holder.icon_1.setImageDrawable(mContext.getResources().getDrawable((R.mipmap.head)));}else{holder.relativeLayout_1.setVisibility(View.GONE);holder.relativeLayout_2.setVisibility(View.VISIBLE);if (chat.getFiletype().equals(mContext.getString(R.string.talk))){holder.ch_2.setVisibility(View.VISIBLE);holder.ch_2.setText(chat.getTalk());holder.file_icon_2.setVisibility(View.GONE);}else{holder.ch_2.setVisibility(View.GONE);holder.file_icon_2.setVisibility(View.VISIBLE);String filename = chat.getTalk();holder.file_icon_2.setImageResource(StringUtil.geticonid(filename));}holder.icon_2.setImageDrawable(mContext.getResources().getDrawable((R.mipmap.head)));}}@Overridepublic int getItemCount() {return chats.size();}}