废话不多说，先上效果图

下面来实现

1.第一步导入jar or so

去环信下载sdk导入到我们的项目中

导入完成之后我们区项目的build文件中，android括号的最下方加上以下代码

不然jar无法使用

sourceSets {

main {

jniLibs.srcDir 'libs'

}

}

导入完jar包，我们来配置清单中配置环信所需的权限和服务

将以上内容全部添加到配置清单中之后将图中“你的APPK”处替换成你环信应用的APPK，

另外使用之前不要忘记初始化环信SDk哦

EMOptions options = new EMOptions();

options.setAcceptInvitationAlways(false);

EMClient.getInstance().init(this, options);

EMClient.getInstance().setDebugMode(true);

到此，配置和前期工作就做完啦，接下来就是撸码了

2.完善基本功能

首先我们先来写一个登陆页面xml

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/activity_main" android:orientation="vertical"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.crackgmkey.chat.LoginActivity">

android:background="@drawable/log_bg" android:layout_marginTop="5dp"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/user_et" />

android:background="@drawable/log_bg"

android:layout_width="match_parent" android:layout_marginTop="5dp"

android:layout_height="wrap_content" android:id="@+id/pass_et"/>

android:layout_width="match_parent" android:padding="10dp"

android:layout_height="wrap_content">

android:id="@+id/bt_login" android:background="@drawable/dd_bg"

android:layout_width="0dp" android:text="登录"

android:layout_height="wrap_content" />

android:layout_width="2dp"

android:layout_height="match_parent"/>

android:id="@+id/bt_reg" android:background="@drawable/dd_bg"

android:layout_width="0dp" android:text="注册"

android:layout_height="wrap_content" />

登陆页面已经写好 下面来写代码

贴出LoginActivity的代码

package com.crackgmkey.chat;

import android.content.Intent;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

import com.hyphenate.EMCallBack;

import com.hyphenate.chat.EMClient;

import com.hyphenate.exceptions.HyphenateException;

import rx.Observable;

import rx.Subscriber;

import rx.android.schedulers.AndroidSchedulers;

import rx.functions.Action1;

import rx.schedulers.Schedulers;

public class LoginActivity extends AppCompatActivity implements View.OnClickListener {

private EditText etUser,etPass;//用户名和密码窗口

private Button btReg,btLogin;//登录注册

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.login);

init();

}

//初始化控件

private void init(){

getLoginExit();

etUser = (EditText) findViewById(R.id.user_et);

etPass = (EditText) findViewById(R.id.pass_et);

btReg = (Button) findViewById(R.id.bt_reg);

btLogin = (Button) findViewById(R.id.bt_login);

btReg.setOnClickListener(this);

btLogin.setOnClickListener(this);

}

@Override

public void onClick(View view) {

switch (view.getId()){

case R.id.bt_reg:

regUser();

break;

case R.id.bt_login:

login();

break;

}

}

/**

* 注册用户(同步需注意)

*/

private void regUser(){

Observable.create(new Observable.OnSubscribe() {

@Override

public void call(Subscriber super String> subscriber) {

try {

EMClient.getInstance().createAccount(etUser.getText().toString().trim(), etPass.getText().toString().trim());//同步方法

subscriber.onNext("注册成功");

} catch (HyphenateException e) {

e.printStackTrace();

subscriber.onNext("注册失败错误码："+e.getErrorCode());

}

}

}).subscribeOn(Schedulers.io())

.observeOn(AndroidSchedulers.mainThread())

.subscribe(new Action1() {

@Override

public void call(String s) {

Toast.makeText(LoginActivity.this, s, Toast.LENGTH_SHORT).show();

}

});

}

/**

* 登录用户(异步)

*/

private void login(){

final String userName = etUser.getText().toString().trim();

final String password = etPass.getText().toString().trim();

Observable.create(new Observable.OnSubscribe() {

@Override

public void call(final Subscriber super String> subscriber) {

EMClient.getInstance().login(userName,password,new EMCallBack() {//回调

@Override

public void onSuccess() {

EMClient.getInstance().groupManager().loadAllGroups();

EMClient.getInstance().chatManager().loadAllConversations();

startActivity(new Intent(LoginActivity.this,MainActivity.class));

subscriber.onNext("登录聊天服务器成功");

}

@Override

public void onProgress(int progress, String status) {

}

@Override

public void onError(int code, String message) {

subscriber.onNext("登录聊天服务器失败："+code);

}

});

}

}).subscribeOn(Schedulers.immediate())

.observeOn(AndroidSchedulers.mainThread())

.subscribe(new Action1() {

@Override

public void call(String s) {

Toast.makeText(LoginActivity.this, s, Toast.LENGTH_SHORT).show();

}

});

}

/**

* 退出登录

*/

private void getLoginExit(){

EMClient.getInstance().logout(true, new EMCallBack() {

@Override

public void onSuccess() {

// TODO Auto-generated method stub

}

@Override

public void onProgress(int progress, String status) {

// TODO Auto-generated method stub

}

@Override

public void onError(int code, String message) {

// TODO Auto-generated method stub

}

});

}

}

该页面包含了登陆和注册，在登录成功的时候会跳转到Mainactivity中，接下来我们来写Mainactivity的代码，首先我们先写好布局文件

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/activity_main"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.crackgmkey.chat.MainActivity">

android:layout_width="match_parent" android:hint="输入对方用户名" android:layout_marginTop="10dp"

android:layout_height="40dp" android:padding="10dp" android:layout_marginBottom="20dp"/>

android:layout_width="wrap_content" android:text="发起聊天" android:layout_marginLeft="40dp"

android:layout_height="wrap_content" android:background="@drawable/buttonbg" />

android:textColor="@android:color/white"

android:layout_width="wrap_content" android:text="退出登录" android:background="@drawable/buttonbg"

android:layout_height="wrap_content" android:layout_toRightOf="@+id/bt_startChat" />

效果图

很简单，就两个按钮和一个输入框，一个是发起聊天一个是退出登录，点击发起聊天的时候会跳转到一个新的聊天页面，我们来写代码

package com.crackgmkey.chat;

import android.content.Intent;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import com.hyphenate.EMCallBack;

import com.hyphenate.chat.EMClient;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private EditText etChatId;

private Button btStartChat,btExit;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

init();

}

/**

* 初始化组件

*/

private void init() {

etChatId = (EditText) findViewById(R.id.et_chatId);

btStartChat = (Button) findViewById(R.id.bt_startChat);

btExit = (Button) findViewById(R.id.bt_exit);

btStartChat.setOnClickListener(this);

btExit.setOnClickListener(this);

}

@Override

public void onClick(View view) {

switch (view.getId()){

case R.id.bt_exit:

getLoginExit();

break;

case R.id.bt_startChat:

Intent inetent = new Intent(this,UserChatActivity.class);

inetent.putExtra("userid",etChatId.getText().toString());

startActivity(inetent);

break;

}

}

/**

* 退出登录

*/

private void getLoginExit(){

EMClient.getInstance().logout(true, new EMCallBack() {

@Override

public void onSuccess() {

// TODO Auto-generated method stub

}

@Override

public void onProgress(int progress, String status) {

// TODO Auto-generated method stub

}

@Override

public void onError(int code, String message) {

// TODO Auto-generated method stub

}

});

}

}

可以看到代码也是比较简单，只有一个退出的方法和一个跳转的操作，接下来我们来看UserChatActivity的xml布局

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/activity_user_chat"

android:layout_width="match_parent" android:orientation="vertical"

android:layout_height="match_parent"

tools:context="com.crackgmkey.chat.UserChatActivity">

android:layout_width="match_parent" android:layout_above="@+id/messagelay"

android:layout_height="match_parent" />

android:layout_width="match_parent" android:orientation="horizontal"

android:layout_height="wrap_content">

android:layout_width="270dp" android:id="@+id/et_chatmessage"

android:layout_height="40dp" />

android:layout_width="wrap_content" android:layout_toRightOf="@+id/et_chatmessage"

android:layout_height="wrap_content" />

基本就是这个样子，我们来看代码

package com.crackgmkey.chat;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import com.hyphenate.EMMessageListener;

import com.hyphenate.chat.EMClient;

import com.hyphenate.chat.EMMessage;

import com.hyphenate.chat.EMTextMessageBody;

import java.util.List;

import rx.Observable;

import rx.functions.Action1;

public class UserChatActivity extends AppCompatActivity implements View.OnClickListener,EMMessageListener {

private TextView tvMessageData;

private EditText etChatmess;

private Button btSent;

private String userId;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_user_chat);

userId = getIntent().getExtras().getString("userid");

init();

EMClient.getInstance().chatManager().addMessageListener(this);

}

/**

* 初始化控件

*/

private void init() {

tvMessageData = (TextView) findViewById(R.id.tv_messagedata);

etChatmess = (EditText) findViewById(R.id.et_chatmessage);

btSent = (Button) findViewById(R.id.bt_sent);

btSent.setOnClickListener(this);

}

@Override

public void onClick(View view) {

switch (view.getId()){

case R.id.bt_sent:

sendMessage();

break;

}

}

/**

* 发送消息

*/

private void sendMessage(){

String messageStr = etChatmess.getText().toString();

EMMessage messagelay = EMMessage.createTxtSendMessage(messageStr,userId);

EMClient.getInstance().chatManager().sendMessage(messagelay);

etChatmess.setText("");

tvMessageData.append("我："+messageStr+"\n");

}

@Override

public void onMessageReceived(List messages) {

Observable.from(messages).subscribe(new Action1() {

@Override

public void call(EMMessage emMessage) {

EMTextMessageBody emtextmessage = (EMTextMessageBody) emMessage.getBody();

tvMessageData.append(emMessage.getFrom()+"："+emtextmessage.getMessage()+"\n");

}

});

}

@Override

public void onCmdMessageReceived(List messages) {

}

@Override

public void onMessageRead(List messages) {

}

@Override

public void onMessageDelivered(List messages) {

}

@Override

public void onMessageChanged(EMMessage message, Object change) {

}

@Override

protected void onDestroy() {

super.onDestroy();

EMClient.getInstance().chatManager().removeMessageListener(this);

}

}

接收消息的回调是onMessageReceived方法，返回的是一个List,到此基本功能就完成了，具体需求请查看环信官方文档

http://docs.easemob.com/im/200androidclientintegration/10androidsdkimport，写的非常靠谱

最后附上demo下载地址：https://download..net/download/crackgmkey/10644547