國際慣例，先上效果圖

Github代碼地址

環(huán)信SDK開發(fā)文檔

部分代碼

Application中初始化：

        var options = EMOptions()
        // 默認(rèn)添加好友時，是不需要驗證的，改成需要驗證
        options.acceptInvitationAlways = false
        // 是否自動將消息附件上傳到環(huán)信服務(wù)器，默認(rèn)為True是使用環(huán)信服務(wù)器上傳下載，如果設(shè)為 false，需要開發(fā)者自己處理附件消息的上傳和下載
        options.autoTransferMessageAttachments = true
        // 是否自動下載附件類消息的縮略圖等，默認(rèn)為 true 這里和上邊這個參數(shù)相關(guān)聯(lián)
        options.setAutoDownloadThumbnail(true)
        //初始化
        EMClient.getInstance().init(applicationContext, options)
        //在做打包混淆時，關(guān)閉debug模式，避免消耗不必要的資源
        EMClient.getInstance().setDebugMode(true)

鏈接狀態(tài)監(jiān)聽listener ：

open class ConnectionListener : EMConnectionListener {

    override fun onConnected() {
        Log.i("minfo", "賬號連接成功")
    }

    override fun onDisconnected(errorCode: Int) {
        when(errorCode) {
            EMError.USER_REMOVED ->
                Log.i("minfo", "用戶已被刪除")
            EMError.USER_LOGIN_ANOTHER_DEVICE ->
                Log.i("minfo", "異地登錄被擠掉")

        }
    }

}

賬號注冊：

        //注意：這里的注冊有個坑，必須要在子線程中才可以，否則會拋出異常
        Thread {
            kotlin.run {
                //注冊賬號,注冊失敗會拋出HyphenateException: Registration failed.
                //比如重復(fù)注冊，比如在子線程中注冊
                try {
                    EMClient.getInstance().createAccount(userId, psd)  //同步方法
                } catch (e: Exception) {
                    Log.i("minfo", "賬號已存在")
                }

                runOnUiThread {
                    //賬號登錄
                    login()
                }
            }
        }.start()

登錄：

        EMClient.getInstance().login(userId, userPsd, object: EMCallBack {
            override fun onSuccess() {
                Log.i("minfo", "登錄聊天服務(wù)器成功")
                startActivity(Intent(this@LoginActivity, MainActivity::class.java))
            }

            override fun onProgress(progress: Int, status: String?) {

            }

            override fun onError(code: Int, error: String?) {
                Log.i("minfo", "登錄聊天服務(wù)器失敗")
            }

        })

退出登錄：

        EMClient.getInstance().logout(true, object: EMCallBack {
            override fun onSuccess() {
                Log.i("minfo", "退出登錄成功")
            }

            override fun onProgress(progress: Int, status: String?) {

            }

            override fun onError(code: Int, error: String?) {
                Log.i("minfo", "退出登錄失敗")
            }

        })

EaseUI 使用指南

EaseUI 是一個 UI 庫，封裝了 IM 功能常用的控件、fragment 等等，旨在幫助開發(fā)者快速集成環(huán)信 SDK。

- 會話列表頁面：EaseConversationListFragment

conversationListFragment = new EaseConversationListFragment();
conversationListFragment.setConversationListItemClickListener(new EaseConversationListItemClickListener() {
            
    @Override
    public void onListItemClicked(EMConversation conversation) {
        startActivity(new Intent(MainActivity.this, ChatActivity.class).putExtra(EaseConstant.EXTRA_USER_ID, conversation.getUserName()));
    }
});

- 聯(lián)系人列表EaseContactListFragment

contactListFragment= new EaseContactListFragment();
//需要設(shè)置聯(lián)系人列表才能啟動fragment
contactListFragment.setContactsMap(getContacts());
//設(shè)置item點擊事件
contactListFragment.setContactListItemClickListener(new EaseContactListItemClickListener() {
            
            @Override
            public void onListItemClicked(EaseUser user) {
                startActivity(new Intent(MainActivity.this, ChatActivity.class).putExtra(EaseConstant.EXTRA_USER_ID, user.getUsername()));
            }
        });

- 聊天頁面：EaseChatFragment

        val chatFragment = EaseChatFragment()
        val args = Bundle()
        args.putInt(EaseConstant.EXTRA_CHAT_TYPE, EaseConstant.CHATTYPE_SINGLE)
        args.putString(EaseConstant.EXTRA_USER_ID, userId)
        chatFragment.arguments = args
        supportFragmentManager.beginTransaction().add(R.id.flChat, chatFragment).commit()