Android 基于环信即时云的IM开发

来源：互联网发布：网络大专招生编辑：程序博客网时间：2024/05/16 14:17

假如我们想要快速实现一个即时通讯功能，最快捷的方法就是借助网络上的即时云服务。下面我们讲述一下如何利用环信实现一个IM功能。

首先下载环信的SDK，也就是几个库，把demo里面的HXSDKHelper.java，HXSDKModel.java,DefaultHXSDKModel.java，HXPreferenceUtils.java四个文件复制到新建的工程下。稍作修改。

首先在Application中实现初始化SDK

public static DemoHXSDKHelper hxSDKHelper = new DemoHXSDKHelper();    @Override    public void onCreate() {        super.onCreate();        applicationContext = this;        instance = this;               hxSDKHelper.onInit(applicationContext);    }

然后在Activity中登陆

        EMChatManager.getInstance().login("123456", "123456", new EMCallBack() {            @Override            public void onSuccess() {                runOnUiThread(new Runnable() {                                      @Override                    public void run() {                        // TODO Auto-generated method stub                        Toast.makeText(context, "登陆成功！", Toast.LENGTH_LONG).show();                    }                });            };            @Override            public void onProgress(int progress, String status) {            }            @Override            public void onError(final int code, final String message) {                runOnUiThread(new Runnable() {                    public void run() {                        Toast.makeText(getApplicationContext(), "登陆失败" + message, Toast.LENGTH_SHORT).show();                    }                });            }        });

调用函数进行信息的发送

String string = editText3.getText().toString();                EMMessage message = EMMessage.createSendMessage(EMMessage.Type.TXT);                                                String toNum = editText.getText().toString();                if (toNum.equals("1425193776689")) {                    message.setChatType(ChatType.GroupChat);                }                TextMessageBody txtBody = new TextMessageBody(string);                          message.addBody(txtBody);                               message.setReceipt(toNum);                              try {                    EMChatManager.getInstance().sendMessage(message);                } catch (EaseMobException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }

在接收信息时，只需要监听广播就可以

// 注册接收消息广播        receiver = new NewMessageBroadcastReceiver();        IntentFilter intentFilter = new IntentFilter(EMChatManager.getInstance().getNewMessageBroadcastAction());        intentFilter.setPriority(5);        registerReceiver(receiver, intentFilter);

    private class NewMessageBroadcastReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            // 记得把广播给终结掉            abortBroadcast();            String username = intent.getStringExtra("from");            String msgId    = intent.getStringExtra("msgid");            // 收到这个广播的时候，message已经在db和内存里了，可以通过id获取mesage对象            final EMMessage message = EMChatManager.getInstance().getMessage(msgId);            final TextMessageBody txtBody = (TextMessageBody)message.getBody();            Toast.makeText(getApplicationContext(), "text message from:" + message.getFrom() + " text:" + txtBody.getMessage() + " \n\r", Toast.LENGTH_LONG).show();            runOnUiThread(new Runnable() {                              @Override                public void run() {                                 editText2.setText("from:" + message.getFrom() + "\ntext:" + txtBody.getMessage() + " \n");                }            });               }    }

这样就可以进行收发。
由于环信的库比较大，编译完之后可执行文件有5M那么大。

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