即时聊天APP(六) - 消息的接收以及EventBus使用

通常我们在接收消息的时候会有声音和震动的提示,因此我也加了代码达到这样的效果,这就要用到EventBus了,当然这里我也用到了自定义的广播,所以首先在Mainfests文件中加入以下代码:

<receiver
android:name=".MylocalMessage"
android:process=":bmobpush" >
<intent-filter>
    <!-- 接收自定义广播的action -->
    <action android:name="cn.edu.sau.action.MESSAGE" />
</intent-filter>
</receiver>  

然后再写一个MessageEvent的Bean类对事件进行封装(这里只用到一个String类型的变量):

public class MessageEvent {
public final String message;
public MessageEvent(String message) {
    this.message = message;
}
}  

接下来我们在ImMessageHandler中接收到消息,并调用EventBus的post方法发送事件:

public class ImMessageHandler extends BmobIMMessageHandler{
/**
 * 接收在线消息
 * @param messageEvent
 */
@Override
public void onMessageReceive(MessageEvent messageEvent) {
    super.onMessageReceive(messageEvent);
    final Msg msg = new Msg(messageEvent.getMessage().getContent(), Msg.TYPE_RECEIVED);
    msg.setSender(MyUser.getUni());
    msg.setReceiver(messageEvent.getFromUserInfo().getUserId());
    int len = msg.getContent().length();
    // 过滤字符串
    String str="=[cn.bmob.newim.event.Message Event@";
    String str1="=[cn.bmob.newim.event.MessageEvent@";
    String str2 = msg.getContent().trim();
    int bl = str2.indexOf(str);
    int bo = str2.indexOf(str1);
    if(bl!=-1 || bo!=-1){
    }else{
        if(!msg.getReceiver().equals(Tips.Receiver))
            if(len > 10){
                String show = msg.getContent().substring(0,8);
                //使用EventBus发送通知,主Activity中处理事件
                EventBus.getDefault().post(new cn.edu.sau.joker.MessageEvent(msg.getReceiver()+":"+show+"......"));
            }else {
                EventBus.getDefault().post(new cn.edu.sau.joker.MessageEvent(msg.getReceiver()+":"+msg.getContent()));
            }
            //聊天界面添加消息
            Main.add(msg);
    }
}
/**
 * 接收离线消息,本程序不做处理
 * @param offlineMessageEvent
 */
@Override
public void onOfflineReceive(OfflineMessageEvent offlineMessageEvent) {
    super.onOfflineReceive(offlineMessageEvent);
}
}  

之前我在MainActivity中写了onMessageEvent方法(方法名字随便写,但是在方法前面要加@Subscribe注解,并且指定线程模型),用来接收事件并进行处理(发送广播):

//发送广播
@Subscribe(threadMode = ThreadMode.MAIN)
public void onMessageEvent(cn.edu.sau.joker.MessageEvent event) {
    Intent intent = new Intent("cn.edu.sau.action.MESSAGE");
    intent.putExtra("msg",event.message);
    sendBroadcast(intent);
}  

然后我们在MylocalMessage(为什么我要起这么个类名,请参考Mainfests中的代码)中接收广播,并发送一个通知,指定铃声和震动事件:

public class MylocalMessage extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    // 收到广播时,发送一个通知
    String content = intent.getStringExtra("msg");
    NotificationManager manager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);
    Notification notify = new Notification.Builder(context)
            .setSmallIcon(R.drawable.icon)
            .setContentTitle("您收到一条消息")
            .setContentText(content)
            .build();
    Uri uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
    notify.sound = uri;
    long[] vibrates = { 0, 200, 200, 200 };
    notify.vibrate = vibrates;
    manager.notify(1, notify);
}
}  

整个项目大致就是这样,欢迎大家的评论和指正(虽然我也听不进去),最后放源码APK .##

posted @ 2019-01-28 21:51  干翻苍穹  阅读(871)  评论(0编辑  收藏  举报