/** * Sends a Message containing only the what value. */ public final boolean sendEmptyMessage(int what) { return sendEmptyMessageDelayed(what, 0); }
/** * Pushes a message onto the end of the message queue after all pending messages * before the current time. It will be received in {@link #handleMessage}, * in the thread attached to this handler. */ public final boolean sendMessage(Message msg) { return sendMessageDelayed(msg, 0); }
sendEmptyMessage()只能放int型数据,而sendMessage可以放其他的数据。