Question

发送消息

ExecutorService executorService = threadPoolExecuter.getThreadPoolExecutor();
executorService.shutdownNow();

接收消息

private void sendMessage() {
    final String messageText = messageArea.getText().toString();
    if (TextUtils.isEmpty(messageText)) {
        Toast.makeText(getApplicationContext(), "Can't Send Blank Message", Toast.LENGTH_SHORT).show();
    } else {
        String message_sender_ref = "Messages/" + MessageSenderId + "/" + MessageRecieverId;
        String message_reciver_ref = "Messages/" + MessageRecieverId + "/" + MessageSenderId;

        Map messageTextBody = new HashMap<>();
        messageTextBody.put("Message", messageText);
        messageTextBody.put("Seen", false);
        messageTextBody.put("Type", "Text");
        messageTextBody.put("Time", ServerValue.TIMESTAMP);
        messageTextBody.put("From", MessageSenderId);

        DatabaseReference user_message_key;
        user_message_key = mDatabaseReference.child("Messages").child(MessageSenderId).child(MessageRecieverId);
        message_push_id = user_message_key.push().getKey();


        final Map messageBodyDetails = new HashMap();
        messageBodyDetails.put(message_sender_ref + "/" + message_push_id, messageTextBody);
        messageBodyDetails.put(message_reciver_ref + "/" + message_push_id, messageTextBody);

        messageArea.setText("");

我想检查对方是否已收到我的消息。我不是在谈论可见功能。只是收到的功能，如whatsapp doubletick。无法接收的2种可能性将是应用程序卸载或没有互联网。那么，如何检测对方是否收到了我的消息？ Firebase或Java中是否有方法或实现该方法的方法？

检查用户的互联网连接

0 个答案: