为什么我得到“权限被拒绝”错误？

问题描述：

我正在制作一个Android应用程序，它必须从JSON对象中读取一些值。因此，要获得JSON对象和读它，我用下面的方法：为什么我得到“权限被拒绝”错误？

private void _init() { 
    _rates = new HashMap<String, String>(); 

    URLConnection jsonURL = null; 
    InputStream in = null; 
    String jRatesStream = null; 

    try { 
     jsonURL = new URL(jRatesURL).openConnection(); 
     jsonURL.connect(); // ERROR OCCURING HERE 
     in = jsonURL.getInputStream(); 
     jRatesStream = _convertStreamToString(in); 

    } catch(Exception e) { 
     Log.v("ERROR", "ERROR WHILE READING URL", e); 

    } finally { 
     try { 
      in.close(); 
     } catch (Exception e) { 
     } 
    } 

    try { 
     JSONObject jObject = new JSONObject(jRatesStream); 
     JSONObject jRates = jObject.getJSONObject("rates"); 

     Iterator<String> iterator = jRates.keys(); 
     while(iterator.hasNext()) { 
      String key = iterator.next(); 
      _rates.put(key, String.valueOf(jRates.getDouble(key))); 
     } 

    } catch (Exception e) { 
    } 

}

而且jRatesURL字符串是这样的：

private static final String jRatesURL = "http://openexchangerates.org/latest.json";

但在执行此方法时，我收到拒绝“权限“错误：

ERROR WHILE READING URL 
java.net.SocketException: Permission denied 
    at org.apache.harmony.luni.platform.OSNetworkSystem.createStreamSocketImpl(Native Method) 
    at org.apache.harmony.luni.platform.OSNetworkSystem.createStreamSocket(OSNetworkSystem.java:186) 
    at org.apache.harmony.luni.net.PlainSocketImpl.create(PlainSocketImpl.java:265) 
    at java.net.Socket.checkClosedAndCreate(Socket.java:873) 
    at java.net.Socket.connect(Socket.java:1020) 
    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnection.<init>(HttpConnection.java:62) 
    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpConnectionPool.get(HttpConnectionPool.java:88) 
    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getHTTPConnection(HttpURLConnectionImpl.java:927) 
    at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:909) 
    at com.testing.exchangerates.Rates._init(Rates.java:45) 
    at com.testing.exchangerates.Rates.<init>(Rates.java:27) 
    at com.testing.exchangerates.HomeActivity.onCreate(HomeActivity.java:27) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
    at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
    at android.os.Handler.dispatchMessage(Handler.java:99) 
    at android.os.Looper.loop(Looper.java:123) 
    at android.app.ActivityThread.main(ActivityThread.java:4627) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:521) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
    at dalvik.system.NativeStart.main(Native Method)

那么，这个错误的原因是什么？连接到JSON链接时我做错了什么？

任何帮助非常感谢。谢谢！

检查所有所需的权限您Manifest.xml文件是有或没有。 – anddev 2012-02-23 05:07:49

是的，这是问题！谢谢.. – Roshnal 2012-02-23 05:25:11

答

从here

String INTERNET Allows applications to open network sockets.

使用该权限在您的清单

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

非常感谢您的回答！这是错误的原因..没想到这是一个小问题:) – Roshnal 2012-02-23 05:26:55

答

你给了许可

<uses-permission android:name="android.permission.INTERNET" />

在清单

？

是的，这是问题！谢谢，但我选择其他答案是正确的，因为他先回答，并有更多信息..但是，不过谢谢！ – Roshnal 2012-02-23 05:25:52

为什么我得到“权限被拒绝”错误？

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