Android截取请求字符串返回空onResponse

哎哟，哎哟，哎哟|

为什么为空

服务器端已修复

所有方法都是固定的

为什么为空？类似的代码是workd，但此代码不是workd。所有

日志

都正常

在帧集对话框中：

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.player_artists_dialog, container, false);

    getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
    getDialog().setCancelable(true);

    model = this.getArguments().getParcelable("model");

    progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);
    listView = (ListView) rootView.findViewById(R.id.listView);

    listView.setVisibility(View.INVISIBLE);
    progressBar.setVisibility(View.VISIBLE);

    StringRequest request = new StringRequest(Request.Method.POST,
            ".. url ..",

            new Response.Listener<String>() {

                @Override
                public void onResponse(String response) {

                    Toast.makeText(getContext(), response, Toast.LENGTH_LONG).show(); // show null

                }
            },

            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError ex) {
                }
            }) {

        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String, String> params = new HashMap<>();
            params.put("a", String.valueOf(model.getTr()));
            params.put("b", String.valueOf(model.getCat()));
            return params;
        }

    };

    RequestQueue queue = VolleySingleton.getInstance().getRequestQueue();
    queue.add(request);

    return rootView;
}

为什么NULL？？？？？

用于将自签名SSL证书导入Android 4.1上的Volley+
Use to import self-signed SSL certificate to Volley on Android 4.1+
It will make volley to Trust all SSL certificates
I hope it will work.

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.player_artists_dialog, container, false);

    getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
    getDialog().setCancelable(true);

    model = this.getArguments().getParcelable("model");

    progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);
    listView = (ListView) rootView.findViewById(R.id.listView);

    listView.setVisibility(View.INVISIBLE);
    progressBar.setVisibility(View.VISIBLE);

        //use trustAllCertificates here.
   trustAllCertificates();


    StringRequest request = new StringRequest(Request.Method.POST,
            ".. url ..",

            new Response.Listener<String>() {

                @Override
                public void onResponse(String response) {

                    Toast.makeText(getContext(), response, Toast.LENGTH_LONG).show(); // show null

                }
            },

            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError ex) {
                }
            }) {

        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String, String> params = new HashMap<>();
            params.put("a", String.valueOf(model.getTr()));
            params.put("b", String.valueOf(model.getCat()));
            return params;
        }

    };

    RequestQueue queue = VolleySingleton.getInstance().getRequestQueue();
    queue.add(request);

    return rootView;
}
 private void trustAllCertificates() {
        try {
            TrustManager[] trustAllCerts = new TrustManager[] {
                    new X509TrustManager() {
                        public X509Certificate[] getAcceptedIssuers() {
                            X509Certificate[] myTrustedAnchors = new X509Certificate[0];
                            return myTrustedAnchors;
                        }

                        @Override
                        public void checkClientTrusted(X509Certificate[] certs, String authType) {}

                        @Override
                        public void checkServerTrusted(X509Certificate[] certs, String authType) {}
                    }
            };

            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, trustAllCerts, new SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
            HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String arg0, SSLSession arg1) {
                    return true;
                }
            });
        } catch (Exception e) {
        }
    }

信任所有SSL证书将导致截击
我希望它能起作用。
@可空
@凌驾
创建视图时的公共视图（LayoutFlater充气机、@Nullable ViewGroup容器、@Nullable Bundle savedInstanceState）{
ViewGroup rootView=（ViewGroup）充气器。充气（R.layout.player\u artists\u对话框，容器，false）；
getDialog（）.getWindow（）.setBackgroundDrawable（新的ColorDrawable（android.graphics.Color.TRANSPARENT））；
getDialog（）.setCancelable（true）；
model=this.getArguments（）.getParcelable（“模型”）；
progressBar=（progressBar）rootView.findviewbyd（R.id.progressBar）；
listView=（listView）rootView.findViewById（R.id.listView）；
setVisibility（View.INVISIBLE）；
progressBar.setVisibility（View.VISIBLE）；
//在此处使用trustAllCertificates。
信任证书（）；
StringRequest=新的StringRequest（request.Method.POST，
“.url…”，
新的Response.Listener（）{
@凌驾
公共void onResponse（字符串响应）{
Toast.makeText（getContext（），response，Toast.LENGTH_LONG）.show（）；//show null
}
},
新的Response.ErrorListener（）{
@凌驾
公共响应（截击错误）{
}
}) {
@凌驾
受保护的映射getParams（）引发AuthFailureError{
Map params=新的HashMap（）；
put（“a”，String.valueOf（model.getter（））；
params.put（“b”，String.valueOf（model.getCat（））；
返回参数；
}
};
RequestQueue queue=VolleySingleton.getInstance（）.getRequestQueue（）；
添加（请求）；
返回rootView；
}
私有无效trustAllCertificates（）{
试一试{
TrustManager[]trustAllCerts=新的TrustManager[]{
新X509TrustManager（）{
公共X509证书[]getAcceptedIssuers（）{
X509Certificate[]myTrustedAnchors=新的X509Certificate[0]；
返回myTrustedAnchors；
}
@凌驾
public void checkClientTrusted（X509Certificate[]证书，字符串authType）{}
@凌驾
public void checkServerTrusted（X509Certificate[]证书，字符串authType）{}
}
};
SSLContext sc=SSLContext.getInstance（“SSL”）；
sc.init（null，trustAllCerts，new SecureRandom（））；
HttpsURLConnection.setDefaultSSLSocketFactory（sc.getSocketFactory（））；
HttpsURLConnection.setDefaultHostnameVerifier（新的HostnameVerifier（）{
@凌驾
公共布尔验证（字符串arg0，SSLSession arg1）{
返回true；
}
});
}捕获（例外e）{
}
}

用于将自签名SSL证书导入Android 4.1上的Volley+
信任所有SSL证书将导致截击
我希望它能起作用。
@可空
@凌驾
创建视图时的公共视图（LayoutFlater充气机、@Nullable ViewGroup容器、@Nullable Bundle savedInstanceState）{
ViewGroup rootView=（ViewGroup）充气器。充气（R.layout.player\u artists\u对话框，容器，false）；
getDialog（）.getWindow（）.setBackgroundDrawable（新的ColorDrawable（android.graphics.Color.TRANSPARENT））；
getDialog（）.setCancelable（true）；
model=this.getArguments（）.getParcelable（“模型”）；
progressBar=（progressBar）rootView.findviewbyd（R.id.progressBar）；
listView=（listView）rootView.findViewById（R.id.listView）；
setVisibility（View.INVISIBLE）；
progressBar.setVisibility（View.VISIBLE）；
//在此处使用trustAllCertificates。
信任证书（）；
StringRequest=新的StringRequest（request.Method.POST，
“.url…”，
新的Response.Listener（）{
@凌驾
公共void onResponse（字符串响应）{
Toast.makeText（getContext（），response，Toast.LENGTH_LONG）.show（）；//show null
}
},
新的Response.ErrorListener（）{
@凌驾
公共响应（截击错误）{
}
}) {
@凌驾
受保护的映射getParams（）引发AuthFailureError{
Map params=新的HashMap（）；
put（“a”，String.valueOf（model.getter（））；
params.put（“b”，String.valueOf（model.getCat（））；
返回参数；
}
};
RequestQueue queue=VolleySingleton.getInstance（）.getRequestQueue（）；
添加（请求）；
返回rootView；
}
私有无效trustAllCertificates（）{
试一试{
TrustManager[]trustAllCerts=新的TrustManager[]{
新X509TrustManager（）{
公共X509证书[]getAcceptedIssuers（）{
X509Certificate[]myTrustedAnchors=新的X509Certificate[0]；
返回myTrustedAnchors；
}
@凌驾
public void checkClientTrusted（X509Certificate[]证书，字符串authType）{}
@凌驾
public void checkServerTrusted（X509Certificate[]证书，字符串authType）{}
}
};
SSLContext sc=SSLContext.getInstance（“SSL”）；
sc.init（null，trustAllCerts，new SecureRandom（））；
HttpsURLConnection.setDefaultSSLSocketFactory（sc.getSo
String.valueOf(model.getTr()); // 104 is true
String.valueOf(model.getCat()); // 1 is true

Use to import self-signed SSL certificate to Volley on Android 4.1+
It will make volley to Trust all SSL certificates
I hope it will work.

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

    ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.player_artists_dialog, container, false);

    getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
    getDialog().setCancelable(true);

    model = this.getArguments().getParcelable("model");

    progressBar = (ProgressBar) rootView.findViewById(R.id.progressBar);
    listView = (ListView) rootView.findViewById(R.id.listView);

    listView.setVisibility(View.INVISIBLE);
    progressBar.setVisibility(View.VISIBLE);

        //use trustAllCertificates here.
   trustAllCertificates();


    StringRequest request = new StringRequest(Request.Method.POST,
            ".. url ..",

            new Response.Listener<String>() {

                @Override
                public void onResponse(String response) {

                    Toast.makeText(getContext(), response, Toast.LENGTH_LONG).show(); // show null

                }
            },

            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError ex) {
                }
            }) {

        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String, String> params = new HashMap<>();
            params.put("a", String.valueOf(model.getTr()));
            params.put("b", String.valueOf(model.getCat()));
            return params;
        }

    };

    RequestQueue queue = VolleySingleton.getInstance().getRequestQueue();
    queue.add(request);

    return rootView;
}
 private void trustAllCertificates() {
        try {
            TrustManager[] trustAllCerts = new TrustManager[] {
                    new X509TrustManager() {
                        public X509Certificate[] getAcceptedIssuers() {
                            X509Certificate[] myTrustedAnchors = new X509Certificate[0];
                            return myTrustedAnchors;
                        }

                        @Override
                        public void checkClientTrusted(X509Certificate[] certs, String authType) {}

                        @Override
                        public void checkServerTrusted(X509Certificate[] certs, String authType) {}
                    }
            };

            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, trustAllCerts, new SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
            HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String arg0, SSLSession arg1) {
                    return true;
                }
            });
        } catch (Exception e) {
        }
    }

use this
String crappyPrefix = "null";

if(result.startsWith(crappyPrefix)){
    result = result.substring(crappyPrefix.length(), result.length());
}
JSONObject jo = new JSONObject(result);