com.android.volley.NoConnectionError：javax.net.ssl.SSLException：由4.4.4設備上的對等關閉的連接（適用於7.0.1）

Question

我遇到了使用抽排從Web服務向微調器獲取數據的問題。我的問題是同樣的事情在Android 7.0.1（模擬器）但在Android 4.4（真實設備）我能做什麼now.Please幫我。 我的代碼是這樣的

public class MainActivity extends AppCompatActivity implements Spinner.OnItemSelectedListener{ 

    //Declaring an Spinner 
    private Spinner spinner; 

    //An ArrayList for Spinner Items 
    private ArrayList<String> students; 

    //JSON Array 
    private JSONArray result; 
    private RequestQueue requestQueue; 

    //TextViews to display details 
    private TextView textViewName; 
    private TextView textViewCourse; 
    private TextView textViewSession; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     //Initializing the ArrayList 
     students = new ArrayList<String>(); 

     //Initializing Spinner 
     spinner = (Spinner) findViewById(R.id.spinner); 

     //Adding an Item Selected Listener to our Spinner 
     //As we have implemented the class Spinner.OnItemSelectedListener to this class iteself we are passing this to setOnItemSelectedListener 
     spinner.setOnItemSelectedListener(this); 

     //Initializing TextViews 


     //This method will fetch the data from the URL 
     getData(); 
    } 

    private void getData(){ 


     //Creating a request queue 

     JsonObjectRequest StringRequest = new JsonObjectRequest(Config.DATA_URL, null, 
       new Response.Listener<JSONObject>() { 
        @Override 
        public void onResponse(JSONObject response) { 
         if (response != null) { 
          JSONObject j = null; 
          try { 
           //Parsing the fetched Json String to JSON Object 
           j = response; 

           //Storing the Array of JSON String to our JSON Array 
           result = j.getJSONArray(Config.JSON_ARRAY); 

           //Calling method getStudents to get the students from the JSON Array 
           getStudents(result); 
          } catch (JSONException e) { 
           e.printStackTrace(); 
          } 
         } 
        } 
       }, 
       new Response.ErrorListener() { 
        @Override 
        public void onErrorResponse(VolleyError error) { 
         System.out.println("Volly error is this >>" + error); 



        } 

       }); 
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN 
       && Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) { 
      HttpStack stack = null; 
      try { 
       stack = new HurlStack(null, new TLSSocketFactory()); 
      } catch (KeyManagementException e) { 
       e.printStackTrace(); 
       Log.d("Your Wrapper Class", "Could not create new stack for TLS v1.2"); 
       stack = new HurlStack(); 
      } catch (NoSuchAlgorithmException e) { 
       e.printStackTrace(); 
       Log.d("Your Wrapper Class", "Could not create new stack for TLS v1.2"); 
       stack = new HurlStack(); 
      } 
      requestQueue = Volley.newRequestQueue(getApplicationContext(), stack); 
     } else { 
      requestQueue = Volley.newRequestQueue(getApplicationContext()); 
     } 

     requestQueue = Volley.newRequestQueue(this); 
     requestQueue.add(StringRequest); 
    } 


    private void getStudents(JSONArray j){ 
     //Traversing through all the items in the json array 
     for(int i=0;i<j.length();i++){ 
      try { 
       //Getting json object 
       JSONObject json = j.getJSONObject(i); 

       //Adding the name of the student to array list 
       students.add(json.getString(Config.TAG_USERNAME)); 
      } catch (JSONException e) { 
       e.printStackTrace(); 
      } 
     } 

     Log.e("student >>",students.toString()); 
     //Setting adapter to show the items in the spinner 
     spinner.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, students)); 
    } 

    //Method to get student name of a particular position 


    //this method will execute when we pic an item from the spinner 
    @Override 
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
     //Setting the values to textviews for a selected item 

    } 

    //When no item is selected this method would execute 
    @Override 
    public void onNothingSelected(AdapterView<?> parent) { 

    } 

} 

Answer 1

我有類似這樣的問題，即我的API調用，將在Android中的較新版本在舊的（21和起來，我認爲），但無法正常工作。這是由於較新版本的Android僅支持更新版本的SSL。

爲了克服這個問題，我們必須多一點設置初始化凌空請求隊列時：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN 
      && Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) { 
     HttpStack stack = null; 
     try { 
      stack = new HurlStack(null, new TLSSocketFactory()); 
     } catch (KeyManagementException e) { 
      e.printStackTrace(); 
      Log.d("Your Wrapper Class", "Could not create new stack for TLS v1.2"); 
      stack = new HurlStack(); 
     } catch (NoSuchAlgorithmException e) { 
      e.printStackTrace(); 
      Log.d("Your Wrapper Class", "Could not create new stack for TLS v1.2"); 
      stack = new HurlStack(); 
     } 
     requestQueue = Volley.newRequestQueue(context, stack); 
    } else { 
     requestQueue = Volley.newRequestQueue(context); 
    } 

TLSSocketFactory

public class TLSSocketFactory extends SSLSocketFactory { 

private SSLSocketFactory internalSSLSocketFactory; 

public TLSSocketFactory() throws KeyManagementException, NoSuchAlgorithmException { 
    SSLContext context = SSLContext.getInstance("TLS"); 
    context.init(null, null, null); 
    internalSSLSocketFactory = context.getSocketFactory(); 
} 

@Override 
public String[] getDefaultCipherSuites() { 
    return internalSSLSocketFactory.getDefaultCipherSuites(); 
} 

@Override 
public String[] getSupportedCipherSuites() { 
    return internalSSLSocketFactory.getSupportedCipherSuites(); 
} 

@Override 
public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException { 
    return enableTLSOnSocket(internalSSLSocketFactory.createSocket(s, host, port, autoClose)); 
} 

@Override 
public Socket createSocket(String host, int port) throws IOException, UnknownHostException { 
    return enableTLSOnSocket(internalSSLSocketFactory.createSocket(host, port)); 
} 

@Override 
public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException, UnknownHostException { 
    return enableTLSOnSocket(internalSSLSocketFactory.createSocket(host, port, localHost, localPort)); 
} 

@Override 
public Socket createSocket(InetAddress host, int port) throws IOException { 
    return enableTLSOnSocket(internalSSLSocketFactory.createSocket(host, port)); 
} 

@Override 
public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException { 
    return enableTLSOnSocket(internalSSLSocketFactory.createSocket(address, port, localAddress, localPort)); 
} 

private Socket enableTLSOnSocket(Socket socket) { 
    if(socket != null && (socket instanceof SSLSocket)) { 
     ((SSLSocket)socket).setEnabledProtocols(new String[] {"TLSv1.1", "TLSv1.2"}); 
    } 
    return socket; 
} 
} 

的TLSSocketFactory類添加到您的項目，它應該工作完美無瑕。