空对象转换为字符串

空对象转换为字符串

本文介绍了空对象转换为字符串的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我已经写了一个机器人程序加载值从Web服务为tablerow。但价值来自空,所以我需要做转换成字符串。可有一个人告诉我的方法去做。

 尝试{

    SoapObject请求= service.getRequest();
    SoapSerializationEnvelope信封= service.getEnvelope(要求);
    SoapObject响应= service.getResponse(信封);
    Log.i(服务大师,response.toString());
    诠释计数= response.getPropertyCount();
    的for(int i = 0; I<计数;我++){
        SoapObject结果=(SoapObject)response.getProperty(ⅰ);
        DeleteuserDetails deleteuserDetails =新DeleteuserDetails();
        deleteuserDetails.setUserId(result.getPropertyAsString(4));
        deleteuserDetails.setUserName(result.getPropertyAsString(2));
        deleteuserDetails.setUserRole(result.getPropertyAsString(3));
        deleteuserDetails.setCreatedDate(result.getPropertyAsString(1));
        deleteuserDetails.setCreatedBy(result.getPropertyAsString(0));
        userdetail.add(deleteuserDetails);
    }
 

现在 deleteuserDetails.setCreatedBy(result.getPropertyAsString(0)); 会从web服务的空值,所以我需要将其转换成字符串

LogCat中:

  12-20 18:48:52.608:W / System.err的(2174):显示java.lang.NullPointerException
12-20 18:48:52.608:W / System.err的(2174):在org.ksoap2.serialization.SoapObject.getPropertyAsString(SoapObject.java:165)
12-20 18:48:52.608:W / System.err的(2174):在com.mvss.admin.Deleteuser $ deteUserIdLoad.doInBackground(Deleteuser.java:81)
12-20 18:48:52.608:W / System.err的(2174):在com.mvss.admin.Deleteuser $ deteUserIdLoad.doInBackground(Deleteuser.java:1)
12-20 18:48:52.608:W / System.err的(2174):在android.os.AsyncTask $ 2.call(AsyncTask.java:185)
12-20 18:48:52.608:W / System.err的(2174):在java.util.concurrent.FutureTask中$ Sync.innerRun(FutureTask.java:305)
12-20 18:48:52.608:W / System.err的(2174):在java.util.concurrent.FutureTask.run(FutureTask.java:137)
12-20 18:48:52.608:W / System.err的(2174):在java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
12-20 18:48:52.608:W / System.err的(2174):在java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:561)
12-20 18:48:52.608:W / System.err的(2174):在java.lang.Thread.run(Thread.java:1096)
 

解决方案

使用此,

 尝试{
    deleteuserDetails.setCreatedBy(result.getPropertyAsString(0)的ToString());
}
赶上(例外五){
    deleteuserDetails.setCreatedBy(空);
}
 

I have written an android program to load values to tablerow from web service. But a value comes null so I need do convert it into string. Can some one tell me the method to do it.

try{

    SoapObject request = service.getRequest();
    SoapSerializationEnvelope envelope = service.getEnvelope(request);
    SoapObject response = service.getResponse(envelope);
    Log.i("Service Master", response.toString());
    int count = response.getPropertyCount();
    for (int i = 0; i < count; i++) {
        SoapObject result = (SoapObject) response.getProperty(i);
        DeleteuserDetails deleteuserDetails=new DeleteuserDetails();
        deleteuserDetails.setUserId(result.getPropertyAsString(4));
        deleteuserDetails.setUserName(result.getPropertyAsString(2));
        deleteuserDetails.setUserRole(result.getPropertyAsString(3));
        deleteuserDetails.setCreatedDate(result.getPropertyAsString(1));
        deleteuserDetails.setCreatedBy(result.getPropertyAsString(0));
        userdetail.add(deleteuserDetails);
    }

Now deleteuserDetails.setCreatedBy(result.getPropertyAsString(0)); gets null value from webservice, so I need to convert it into string "null".

LogCat:

12-20 18:48:52.608: W/System.err(2174): java.lang.NullPointerException
12-20 18:48:52.608: W/System.err(2174):     at org.ksoap2.serialization.SoapObject.getPropertyAsString(SoapObject.java:165)
12-20 18:48:52.608: W/System.err(2174):     at com.mvss.admin.Deleteuser$deteUserIdLoad.doInBackground(Deleteuser.java:81)
12-20 18:48:52.608: W/System.err(2174):     at com.mvss.admin.Deleteuser$deteUserIdLoad.doInBackground(Deleteuser.java:1)
12-20 18:48:52.608: W/System.err(2174):     at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
12-20 18:48:52.608: W/System.err(2174):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
12-20 18:48:52.608: W/System.err(2174):     at java.lang.Thread.run(Thread.java:1096)
解决方案

Use this,

try {
    deleteuserDetails.setCreatedBy(result.getPropertyAsString(0).toString());
}
catch(Exception e) {
    deleteuserDetails.setCreatedBy("null");
}

这篇关于空对象转换为字符串的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-29 01:45