Java 为测试目的将JSON对象响应传递给TextView时出错_Java_Php_Android_Postman_Jsonobjectrequest

Java 为测试目的将JSON对象响应传递给TextView时出错

java php android postman

Java 为测试目的将JSON对象响应传递给TextView时出错,java,php,android,postman,jsonobjectrequest,Java,Php,Android,Postman,Jsonobjectrequest,我看到了其他的帖子，但是没有用，我仍然有错误，为什么我一直有这个错误。我一直在尝试将JSONObject响应传递给TextView，以检查它是否真的包含对象，然后再尝试将其传递给一些表。从错误来看，分支没有任何价值？为什么？我认为我的JSON Obj与我的postman结果相匹配这是我的错误： 2019-11-10 09:21:51.577 14371-14371/com.example.sample1myapp W/System.err: org.json.JSONException: No

我看到了其他的帖子，但是没有用，我仍然有错误，为什么我一直有这个错误。我一直在尝试将JSONObject响应传递给TextView，以检查它是否真的包含对象，然后再尝试将其传递给一些表。从错误来看，分支没有任何价值？为什么？我认为我的JSON Obj与我的postman结果相匹配

这是我的错误：

2019-11-10 09:21:51.577 14371-14371/com.example.sample1myapp W/System.err: org.json.JSONException: No value for Branches
2019-11-10 09:21:51.577 14371-14371/com.example.sample1myapp W/System.err:     at org.json.JSONObject.get(JSONObject.java:399)
2019-11-10 09:21:51.577 14371-14371/com.example.sample1myapp W/System.err:     at org.json.JSONObject.getJSONArray(JSONObject.java:594)
2019-11-10 09:21:51.577 14371-14371/com.example.sample1myapp W/System.err:     at com.example.sample1myapp.main.Functions.dash_branch.branch$1.onResponse(branch.java:100)
2019-11-10 09:21:51.577 14371-14371/com.example.sample1myapp W/System.err:     at com.example.sample1myapp.main.Functions.dash_branch.branch$1.onResponse(branch.java:96)
2019-11-10 09:21:51.577 14371-14371/com.example.sample1myapp W/System.err:     at com.android.volley.toolbox.JsonRequest.deliverResponse(JsonRequest.java:90)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:102)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at android.os.Handler.handleCallback(Handler.java:883)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:100)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at android.os.Looper.loop(Looper.java:214)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:7356)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
2019-11-10 09:21:51.578 14371-14371/com.example.sample1myapp E/response: {"error":true,"message":"Error Occured 102"}

此问题的主要代码：

public class branch extends AppCompatActivity {

    //getting the current sysID use in protected params
    private static final String KEY_SYS_ID = "sys_id";
    private int sys_Id = SharedPrefManager.getInstance(this).getUserid();

    //View Branch
    private static final String KEY_VB_ID = "branchid";
    private static final String KEY_VB_USER = "username";
    private static final String KEY_VB_PASSWORD = "password";
    private static final String KEY_VB_NAME = "branchname";
    private static final String KEY_VB_SYSID = "sys_id";
    private static final String KEY_VB_CREATED = "created";
    private static final String KEY_VB_UT = "user_type";

    private String url = "http://192.168.1.2/sample1/v1/viewBranches.php";

    private TextView testdata;
    private NestedScrollView nestedScrollView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_branch);
        if (!SharedPrefManager.getInstance(this).isLoggedIn()) {
            finish();
            startActivity(new Intent(this, login.class));
            return;
        }

        testdata = findViewById(R.id.testdatatv);
        nestedScrollView = findViewById(R.id.nested);

    }

    public void retrieve() {
         JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        try {
                            JSONArray jsonArray = response.getJSONArray("Branches");
                            for (int i = 0; i < jsonArray.length(); i++) {
                                JSONObject branch = jsonArray.getJSONObject(i);

                                int viewBranchID = branch.getInt(KEY_VB_ID);
                                String viewBranchUser = branch.getString(KEY_VB_USER);
                                String viewBranchPassword = branch.getString(KEY_VB_PASSWORD);
                                String viewBranchName = branch.getString(KEY_VB_NAME);
                                int viewBranchSYSID = branch.getInt(KEY_VB_SYSID);
                                int viewBranchCreated = branch.getInt(KEY_VB_CREATED);
                                String viewBranchUT = branch.getString(KEY_VB_UT);

                                testdata.append(
                                        String.valueOf(viewBranchID)+""+
                                                viewBranchUser+""+
                                                viewBranchPassword+""+
                                                viewBranchName+""+
                                                String.valueOf(viewBranchSYSID)+""+
                                                String.valueOf(viewBranchCreated)+""+
                                                viewBranchUT+"\n\n");
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                            Log.e("response", "" + response);
                        }
                    }

                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.e("response", "" + error);

            }
        }) {
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
                Map<String, String> params = new HashMap<>();
                params.put(KEY_SYS_ID, String.valueOf(sys_Id));
                return params;
            }

        };
        RequestHandler.getInstance(this).addToRequestQueue(jsonObjectRequest);
    }

    /**
     * Show populated Table
     */
    public void onTableshow(View view){
        //tableView = (TableView<String[]>) findViewById(R.id.tableView);
        //new bTSQLClient(branch.this).retrieve(tableView);
        retrieve();
    }

}

邮递员输出

{
    "Branches": [
        {
            "branchid": 12,
            "username": "king",
            "password": "202cb962ac59075b964b07152d234b70",
            "branchname": "123branch",
            "sys_id": 8,
            "created": "2019-10-28 20:45:08",
            "user_type": "Branch"
        },
        {
            "branchid": 13,
            "username": "makoy",
            "password": "bda639c314e39023789c37d7a07469f9",
            "branchname": "makoy",
            "sys_id": 8,
            "created": "2019-10-28 20:50:41",
            "user_type": "Branch"
        },
        {
            "branchid": 14,
            "username": "foodbranch",
            "password": "202cb962ac59075b964b07152d234b70",
            "branchname": "foodbranch",
            "sys_id": 8,
            "created": "2019-10-28 22:01:59",
            "user_type": "Branch"
        },
        {
            "branchid": 15,
            "username": "081nao397",
            "password": "7815696ecbf1c96e6894b779456d330e",
            "branchname": "testingbranchname",
            "sys_id": 8,
            "created": "2019-11-08 08:21:01",
            "user_type": "Branch"
        },
        {
            "branchid": 16,
            "username": "testing101",
            "password": "7815696ecbf1c96e6894b779456d330e",
            "branchname": "rest",
            "sys_id": 8,
            "created": "2019-11-08 08:28:55",
            "user_type": "Branch"
        }
    ]
}

我是对的，对吗？我有一个JSON对象，在JSON对象内部有一个数组，它是

分支

，有5个对象用逗号分隔？这意味着我正在执行JSON对象请求，对吗

这是发送请求的邮递员屏幕

更新
我认为您可能会选择
StringRequest
而不是
JsonObjectRequest
，如下所示

StringRequest jsonObjReq = new StringRequest(Request.Method.POST, url, new com.android.volley.Response.Listener<String>() { @Override public void onResponse(String response) { try { JSONObject jsonObject = new JSONObject(response.toString()); // Parse your JSON data here. } catch (JSONException e) { } } }, new com.android.volley.Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { System.out.println("error:: " + error.toString()); } }) { @Override public String getBodyContentType() { return "application/x-www-form-urlencoded; charset=UTF-8"; } @Override protected Map<String, String> getParams() { Map<String, String> params = new HashMap<String, String>(); params.put(KEY_SYS_ID, String.valueOf(sys_Id)); return params; } };

更新
我认为您可能会选择
StringRequest
而不是
JsonObjectRequest
，如下所示

StringRequest jsonObjReq = new StringRequest(Request.Method.POST, url, new com.android.volley.Response.Listener<String>() { @Override public void onResponse(String response) { try { JSONObject jsonObject = new JSONObject(response.toString()); // Parse your JSON data here. } catch (JSONException e) { } } }, new com.android.volley.Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { System.out.println("error:: " + error.toString()); } }) { @Override public String getBodyContentType() { return "application/x-www-form-urlencoded; charset=UTF-8"; } @Override protected Map<String, String> getParams() { Map<String, String> params = new HashMap<String, String>(); params.put(KEY_SYS_ID, String.valueOf(sys_Id)); return params; } };

我找不到关于JSON解析器的任何错误。你确定你发布的JSON字符串是从php后端得到的吗？是的，我想是的，sirah，现在错误变了，我想在我发布这段代码之前，我不小心把这个方法放在了java上，然后我把它转回到了POST，以匹配我的php，出现了这个新错误！il更新错误代码看起来您得到的响应如下-
{“error”：true，“message”：“error occurrend 102”}
。您没有此处的
分支
信息，因此会出现错误。请检查您是否正确地将参数传递给POST请求，服务器端是否根据有效的请求返回适当的数据。是的，但是我检查了postman并使用了带有sys_id参数的POST，它得到了正确的结果，这就是我在上面发布的postman结果。我找不到关于JSON的任何错误解析器。你确定你发布的JSON字符串是从php后端得到的吗？是的，我想是的，sirah，现在错误变了，我想在我发布这段代码之前，我不小心把这个方法放在了java上，然后我把它转回到了POST，以匹配我的php，出现了这个新错误！il更新错误代码看起来您得到的响应如下-
{“error”：true，“message”：“error occurrend 102”}
。您没有此处的
分支
信息，因此会出现错误。请检查您是否正确地将参数传递给POST请求，服务器端是否根据有效的请求返回适当的数据。是的，但是我检查了postman并使用了带有sys_id参数的POST，它得到了正确的结果，这就是我在上面发布的postman结果我的getParams sir是否正确？使用getParams，我可以从SharedReferences发送当前的sys_id，并将其发送到php代码，以获取与该sys_id相关的所有内容？我认为您是对的。您正在以
字符串
的形式传递参数，该参数应以
整数
的形式传递。我已经更新了我的答案。请看一看。先生，非常感谢您的帮助！但是我仍然得到同样的错误sir你的URL是什么？等等，先生，我会添加我的常量类，这样你就可以看到我的URL，但是我确定我传递的是正确的URL sir是我的getParams sir是正确的？使用getParams，我可以从SharedReferences发送当前的sys_id，并将其发送到php代码，以获取与该sys_id相关的所有内容？我认为您是对的。您正在以
字符串
的形式传递参数，该参数应以
整数
的形式传递。我已经更新了我的答案。请看一看。先生，非常感谢您的帮助！但是我仍然得到同样的错误，先生，你的URL是什么？等等，先生，我会添加我的常量类，这样你就可以看到我的URL，但是我确信我传递的是正确的URL，先生
{ "Branches": [ { "branchid": 12, "username": "king", "password": "202cb962ac59075b964b07152d234b70", "branchname": "123branch", "sys_id": 8, "created": "2019-10-28 20:45:08", "user_type": "Branch" }, { "branchid": 13, "username": "makoy", "password": "bda639c314e39023789c37d7a07469f9", "branchname": "makoy", "sys_id": 8, "created": "2019-10-28 20:50:41", "user_type": "Branch" }, { "branchid": 14, "username": "foodbranch", "password": "202cb962ac59075b964b07152d234b70", "branchname": "foodbranch", "sys_id": 8, "created": "2019-10-28 22:01:59", "user_type": "Branch" }, { "branchid": 15, "username": "081nao397", "password": "7815696ecbf1c96e6894b779456d330e", "branchname": "testingbranchname", "sys_id": 8, "created": "2019-11-08 08:21:01", "user_type": "Branch" }, { "branchid": 16, "username": "testing101", "password": "7815696ecbf1c96e6894b779456d330e", "branchname": "rest", "sys_id": 8, "created": "2019-11-08 08:28:55", "user_type": "Branch" } ] }

StringRequest jsonObjReq = new StringRequest(Request.Method.POST, url, new com.android.volley.Response.Listener<String>() { @Override public void onResponse(String response) { try { JSONObject jsonObject = new JSONObject(response.toString()); // Parse your JSON data here. } catch (JSONException e) { } } }, new com.android.volley.Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { System.out.println("error:: " + error.toString()); } }) { @Override public String getBodyContentType() { return "application/x-www-form-urlencoded; charset=UTF-8"; } @Override protected Map<String, String> getParams() { Map<String, String> params = new HashMap<String, String>(); params.put(KEY_SYS_ID, String.valueOf(sys_Id)); return params; } };

public void retrieve() { JSONObject param = new JSONObject(); try { param.put("sys_id", sys_Id); } catch (JSONException e) { e.printStackTrace(); } // Pass the param while creating the request JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, Constants.viewbranches_url, param, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { try { JSONArray jsonArray = response.getJSONArray("Branches"); for (int i = 0; i < jsonArray.length(); i++) { JSONObject branch = jsonArray.getJSONObject(i); int viewBranchID = branch.getInt(KEY_VB_ID); String viewBranchUser = branch.getString(KEY_VB_USER); String viewBranchPassword = branch.getString(KEY_VB_PASSWORD); String viewBranchName = branch.getString(KEY_VB_NAME); int viewBranchSYSID = branch.getInt(KEY_VB_SYSID); int viewBranchCreated = branch.getInt(KEY_VB_CREATED); String viewBranchUT = branch.getString(KEY_VB_UT); testdata.append( String.valueOf(viewBranchID)+""+ viewBranchUser+""+ viewBranchPassword+""+ viewBranchName+""+ String.valueOf(viewBranchSYSID)+""+ String.valueOf(viewBranchCreated)+""+ viewBranchUT+"\n\n"); } } catch (JSONException e) { e.printStackTrace(); Log.e("response", "" + response); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.e("response", "" + error); } }) { // Set the content type here @Override public String getBodyContentType() { return "application/x-www-form-urlencoded; charset=UTF-8"; } }; RequestHandler.getInstance(this).addToRequestQueue(jsonObjectRequest); }