可能重复：    JSON解析

我解析一个JSON文件（有效期）。它的工作原理在Android 4.0 - 4.0.4，但不是在旧的Andr​​oid版本。 这是我的清单中的一部分：

I am parsing a JSON file (Which is valid). It works on Android 4.0 - 4.0.4 but not on older Android versions. This is a part of my Manifest:

<uses-sdk
    android:minSdkVersion="7"
    android:targetSdkVersion="14" />

这是我解析code：

And this is my parsing code:

public JSONObject getJSONFromUrl(String url) {
    try {
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        is = httpEntity.getContent();

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "UTF-8"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        json = sb.toString();
    } catch (Exception e) {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }

    try {
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    return jObj;

}

和上了年纪的设备，我得到了以下错误消息（但正如我说的不是新的Andr​​oid设备）：

And on the older devices I get the following error message (But as I said not on new Android devices):

org.json.JSONException：java.lang.String类型的值不能转换为JSONObject的

org.json.JSONException: Value of type java.lang.String cannot be converted to JSONObject

我完全不知道为什么它在Android 4，但不能在旧设备的工作。

I have absolutely no idea why it does work on Android 4 but not on older devices.

从这里 找到JSON的

Find the Json from here

推荐答案

这是可能的的JSONObject 解析器已经取得了新的Andr​​oid版本较为宽松。您收到此错误信息出现是由于半信半疑法律JSON，特别是在接收端：

It is possible that the JSONObject parser has been made more lenient in newer Android releases. The error message you are getting appears to be due to dubiously-legal JSON, particularly on the receiving side:

我会建议你写你下载的JSON到一个文件，并将其与原来的比较一下，看是否有与下载逻辑有问题。

I would suggest that you write your downloaded JSON out to a file and compare it with your original to see if there is a problem with the download logic.

更新

我无法重现你的问题。加载一个JSON关闭外部存储工作完全正常在Android 4.0.3，2.3.3，2.2和2.1，使用下面的活动。（注：我是懒惰和硬连接的路径外部存储）：

I cannot reproduce your problem. Loading that JSON off of external storage works perfectly fine on Android 4.0.3., 2.3.3, 2.2, and 2.1, using the following activity (note: I was lazy and hard-wired in the path to external storage):

package com.commonsware.jsontest;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import org.json.JSONException;
import org.json.JSONObject;

public class JSONTestActivity extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    try {
      BufferedReader in=
          new BufferedReader(new FileReader("/mnt/sdcard/test.json"));
      String str;
      StringBuilder buf=new StringBuilder();

      while ((str=in.readLine()) != null) {
        buf.append(str);
        buf.append("\n");
      }

      in.close();
      JSONObject json=new JSONObject(buf.toString());

      ((TextView)findViewById(R.id.stuff)).setText(json.toString());
    }
    catch (IOException e) {
      Log.e(getClass().getSimpleName(), "Exception loading file", e);
    }
    catch (JSONException e) {
      Log.e(getClass().getSimpleName(), "Exception parsing file", e);
    }
  }
}