将Javascript语句放在android上的Javascript接口方法调用之前时未执行

在android上调用javascript接口方法之前，我试图使用jquery更改按钮的文本。但是这个语句没有被执行。这是代码

$("#send_btn").click(function() {
    if(sendto_number_flag == 1 && sendto_msg_flag ==1 ) {
        $(this).html("Sending...");
        //above statement gets executed after the Java.sendSMS gets executed.
        //I have tried with other statements like .addClass() .hide(), nothing works

        var output = Java.sendSMS($("#sendto_number").val(), $("#sendto_msg").val());
        //above statement executes fine and returns valid data
        if(output == "true") {
            $(this).html("Sent Successfully");
        }
        else if(output == "Network Error"){
            $(this).html("Check Connection and Retry");
        }
        else {
            $(this).html("Check Details and Retry");
        }
    }
});

HTML标记

<button type="button" class="button button_red" id="send_btn" value="Send">Send</button>

发送

尝试为

java.sendSMS

呼叫添加一些延迟。像这样的

   $("#send_btn").click(function() {
    if(sendto_number_flag == 1 && sendto_msg_flag ==1 ) {
    $(this).html("Sending...");
    //above statement gets executed after the Java.sendSMS gets executed.
    //I have tried with other statements like .addClass() .hide(), nothing works

    var Variables = {};
    Variables.$obj = $(this);
    Variables.ResizeTimer = setTimeout(
     function(){
    var output = Java.sendSMS($("#sendto_number").val(), $("#sendto_msg").val());
    //above statement executes fine and returns valid data
    if(output == "true") {
        $(Variables.$obj).html("Sent Successfully");
    }
    else if(output == "Network Error"){
        $(Variables.$obj).html("Check Connection and Retry");
    }
    else {
        $(Variables.$obj).html("Check Details and Retry");
     }    
    },1000);
   }
 });

---

您何时注册单击处理程序？该按钮是否已在HTML中，还是稍后将动态添加？如果没有，请尝试（'click'，function（）{…}）上的

$（“#send_btn”）这很有效，谢谢！尽管我在前面使用jquery.delay（）进行了测试。