android - 通过 Web 服务将 ArrayList 从 Android 应用程序发送到远程数据库

Question

我有一个包含特定值的“String”类型的 ArrayList。我想使用 Web 服务将此 ArrayList 发送到远程数据库。我打算使用 JSON 来插入相同的内容，但我遇到了一些困难，想知道如何去做。

这是我目前的代码:

我的 ArrayList 是这样定义的。它的目的是存储复选框值

      ArrayList<String> items2 = new ArrayList<String>();

            for (int i = 0; i < arr2.length; i++) 
            {
                if (checkedabsent.get(i)) 
                {
                    items2.add(arr2[i]); //arr2 is a String array containing all values
                    System.out.println(items2);
                }
            }

            Log.d("", "items:");
            for (String string : items2)
            {
                Log.d("", string);
                System.out.println(items2);
            }

这就是我觉得困难的地方! JSON代码

   HttpPost httppost = new HttpPost("http://10.0.2.2/enterdata/Service1.asmx");
   HttpClient client = new DefaultHttpClient(httpParams);

    try
            {
            String result;
            JSONObject obj = new JSONObject();
           // how do I put the array list over here ??           

            int TIMEOUT_MILLISEC = 10000;  // = 10 seconds
            HttpParams httpParams = new BasicHttpParams();
            HttpConnectionParams.setConnectionTimeout(httpParams, TIMEOUT_MILLISEC);
            HttpConnectionParams.setSoTimeout(httpParams, TIMEOUT_MILLISEC);

            httppost.setHeader("Content-Type", "application/json");
            httppost.setHeader("Accept","application/json");

            // Execute HTTP Post Request
            HttpResponse httpResponse = client.execute(httppost);
            HttpEntity httpEntity = httpResponse.getEntity();


            if (httpEntity != null) 
            {
                InputStream is = httpEntity.getContent();
                result = is.toString();
                Log.i("Result is ", "Result: " + result);
                if(result.equalsIgnoreCase("success"))
                {
                    startActivity(new Intent(Mark.this,nextscreen.class));
                }
            }

            }

Answer 1

要转换为 JSON 数组，您将使用以下内容

ArrayList<String> list = new ArrayList<String>();
list.add("Item 1");
list.add("Item 2");
JSONArray jsArray = new JSONArray(list);

然后像described here一样传递jsArray .

抱歉，如果我误解了你的问题。

更新，所以:

  ArrayList<String> items2 = new ArrayList<String>();

        for (int i = 0; i < arr2.length; i++) 
        {
            if (checkedabsent.get(i)) 
            {
                items2.add(arr2[i]); //arr2 is a String array containing all values
                System.out.println(items2);
            }
        }

        Log.d("", "items:");
        for (String string : items2)
        {
            Log.d("", string);
            System.out.println(items2);
        }

        HttpPost httppost = new HttpPost("http://10.0.2.2/enterdata/Service1.asmx");
        HttpClient client = new DefaultHttpClient(httpParams);

        try
        {
            String result;
            //JSONObject obj = new JSONObject();
            JSONArray jsArray = new JSONArray(items2);

            int TIMEOUT_MILLISEC = 10000;  // = 10 seconds
            HttpParams httpParams = new BasicHttpParams();

...