com.android.volley.NoConnectionError：javax.net.ssl.SSLException：4.4.4デバイスのピアによって接続が閉じられました（7.0.1で動作）

Question

Webサービスからボレーを使用してスピナーにデータを取得する際に問題が発生しました私の問題は同じことがAndroid 7.0.1（エミュレータ）で動作していますが、ではありません。Android 4.4（実デバイス）私は今何ができるのですか？私を助けてください。 私のコードは私のAPIコールは、Androidの新しいバージョン（21とアップと思う）ではなく、古いものに働くだろうことにより、私はこれと同様の問題を持っていたこの

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

です。これは、Androidの新しいバージョンでのみサポートされているSSLの新しいバージョンが原因です。

バレーボール要求キューを初期化する際のビットに我々が持っているこの問題を克服するために多くの設定：

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; 
} 
} 

プロジェクトにTLSSocketFactoryクラスを追加し、それが必要完璧に動作します。