Volley网络请求与JSON数据解析：从错误处理到数据提取的完整指南

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import android.content.Context;
import android.widget.Toast;
import android.util.Log;
import org.json.JSONException;
import org.json.JSONObject;

public class ApiClient {

    private static final String TAG = "ApiClient";
    private RequestQueue requestQueue;
    private Context context;

    public ApiClient(Context context) {
        this.context = context;
        if (requestQueue == null) {
            requestQueue = Volley.newRequestQueue(context.getApplicationContext());
        }
    }

    public void fetchFurnitureDetails(String url) {
        StringRequest stringRequest = new StringRequest(
            Request.Method.GET,
            url,
            response -> {
                // 请求成功的回调
                Log.d(TAG, "Raw Response: " + response);
                // 尝试解析JSON
                parseJsonResponse(response);
            },
            error -> {
                // 请求失败的回调
                String errorMessage = "Volley Error: ";
                if (error.networkResponse != null) {
                    errorMessage += "Status Code " + error.networkResponse.statusCode;
                    errorMessage += ", Data: " + new String(error.networkResponse.data);
                } else if (error.getMessage() != null) {
                    errorMessage += error.getMessage();
                } else {
                    errorMessage += "Unknown error";
                }
                Log.e(TAG, errorMessage, error);
                Toast.makeText(context, errorMessage, Toast.LENGTH_LONG).show();
            }
        );
        requestQueue.add(stringRequest);
    }

    // ... (其他方法)
}

import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
import android.content.Context;
import android.widget.Toast;

public class ApiClient {
    // ... (前面的代码)

    private void parseJsonResponse(String response) {
        try {
            JSONObject obj = new JSONObject(response);

            // 示例：从JSON对象中提取数据
            String furnitureID = obj.getString("FurnitureID");
            String name = obj.getString("Name");
            String description = obj.getString("Description");
            String arObject = obj.getString("AR_Object");
            String image = obj.getString("Image");
            String price = obj.getString("Price");
            String category = obj.getString("Category");
            boolean isFavorite = obj.getBoolean("isFavorite"); // 注意布尔类型

            Log.d(TAG, "FurnitureID: " + furnitureID);
            Log.d(TAG, "Name: " + name);
            Log.d(TAG, "Description: " + description);
            Log.d(TAG, "AR_Object: " + arObject);
            Log.d(TAG, "Image: " + image);
            Log.d(TAG, "Price: " + price);
            Log.d(TAG, "Category: " + category);
            Log.d(TAG, "Is Favorite: " + isFavorite);

            // 可以在这里更新UI或进一步处理数据
            Toast.makeText(context, "家具名称: " + name, Toast.LENGTH_SHORT).show();

        } catch (JSONException e) {
            Log.e(TAG, "JSON Parsing Error: " + e.getMessage(), e);
            Toast.makeText(context, "数据解析失败: " + e.getMessage(), Toast.LENGTH_LONG).show();
        } catch (NumberFormatException e) {
            Log.e(TAG, "Number Format Error in JSON: " + e.getMessage(), e);
            Toast.makeText(context, "数据格式错误: " + e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }

    // ... (其他方法)
}

import org.json.JSONArray;
// ...
try {
    JSONArray jsonArray = new JSONArray(response);
    for (int i = 0; i < jsonArray.length(); i++) {
        JSONObject item = jsonArray.getJSONObject(i);
        // 从每个item中提取数据
        String id = item.getString("id");
        // ...
    }
} catch (JSONException e) {
    Log.e(TAG, "JSON Array Parsing Error: " + e.getMessage(), e);
}