在改造中我无法打印 JSON

Question

在这段代码中，我将发送 id，mobile_no 它会检索我的用户余额，但无法在 Toast.

中打印

我在这里错过了什么我的工作正常但我没有收到响应字符串

private void Get_Wallet_Amount() {
       Call<ResponseBody> call = AppController.getInstance().getApiInterface().getWalle_Data(Utils.getSharedPreference(getApplicationContext()).getString(Const.PREFERENCE_USER_ID,""),
               Utils.getSharedPreference(getApplicationContext()).getString(Const.PREFERENCE_MOBILE_NUMBER,""));
        call.enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                String responseString = null;
                try {
                    Toast.makeText(Proceed_PaymentActivity.this, "HI", Toast.LENGTH_SHORT).show();
                    responseString = response.body().string();
                    JSONObject jsonObject = new JSONObject(responseString);
//It doesn't print output

                Toast.makeText(Proceed_PaymentActivity.this, ""+jsonObject.getString("wallet_amt"), Toast.LENGTH_SHORT).show();
             } catch (JSONException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void onFailure(Call<ResponseBody> call, Throwable t) {
            Toast.makeText(Proceed_PaymentActivity.this, "Error", Toast.LENGTH_SHORT).show();
        }
    });
}

Retrofit Interface

@FormUrlEncoded
@POST("XXXX")
Call<ResponseBody> getWalle_Data(@Field("id") String uid,@Field("mobile") String mobile);

My JSON Output

[
    {
        "wallet_amt": 50
    }
]

Error Logcat org.json.JSONException: Value [{"wallet_amt":50}] of type org.json.JSONArray cannot be converted to JSONObject 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at org.json.JSON.typeMismatch(JSON.java:111) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at org.json.JSONObject.(JSONObject.java:160) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at org.json.JSONObject.(JSONObject.java:173) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at abc.example.com.rechargeappdesugn.activity.Proceed_PaymentActivity.onResponse(Proceed_PaymentActivity.java:97) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall.run(ExecutorCallAdapterFactory.java:68) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at android.os.Handler.handleCallback(Handler.java:751) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at android.os.Handler.dispatchMessage(Handler.java:95) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at android.os.Looper.loop(Looper.java:154) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at android.app.ActivityThread.main(ActivityThread.java:6119) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at java.lang.reflect.Method.invoke(Native Method) 10-13 12:39:37.793 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 10-13 12:39:37.794 28522-28522/abc.example.com.rechargeappdesugn W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

Answer 1

你的 json 是 JSONArray .

在您的代码中使用 JSONArray jsonArray = new JSONArray(responseString);。

you have to use getString() instead of opString().

@Override
public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
    String responseString = null;
    try {
        Toast.makeText(Proceed_PaymentActivity.this, "HI", Toast.LENGTH_SHORT).show();
        responseString = response.body().string();
        // edited here
        JSONArray jsonArray = new JSONArray(responseString);
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject jsonObject = jsonArray.getJSONObject(i);
            String wallet_amt = jsonObject.String("wallet_amt");
            Toast.makeText(Proceed_PaymentActivity.this, wallet_amt, Toast.LENGTH_SHORT).show();
        }
    } catch (JSONException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Answer 2

首先，您不需要进行任何与响应相关的数据操作，因为改造会在内部进行处理。请使用以下代码片段使其正常工作。

 class Wallet {
        @SerializedName("wallet_amt")
        private Long amount;
    }

Call<List<Wallet>> call = AppController.getInstance().getApiInterface().getWalle_Data(Utils.getSharedPreference(getApplicationContext()).getString(Const.PREFERENCE_USER_ID,""),
                    Utils.getSharedPreference(getApplicationContext()).getString(Const.PREFERENCE_MOBILE_NUMBER,""));
            call.enqueue(new Callback<ResponseBody>() {
                @Override
                public void onResponse(Call<List<Wallet>> call, Response<List<Wallet>> response) {
                    String responseString = null;
                    try {

                    } catch (JSONException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

                @Override
                public void onFailure(Call<List<Wallet>> call, Throwable t) {
                    Toast.makeText(Proceed_PaymentActivity.this, "Error", Toast.LENGTH_SHORT).show();
                }
            });

在改造中我无法打印 JSON

in rerofit i coundn't print JSON

android

json

android-networking

retrofit2