可以和知你客服通信

saars/android-app/app/src/main/java/com/saars/chatplatform/presentation/agent/AgentChatActivity.java

@@ -4,6 +4,8 @@ import android.os.Bundle;
 import android.widget.Toast;
 
 import androidx.appcompat.app.AppCompatActivity;
+
+import org.json.JSONObject;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
@@ -97,18 +99,41 @@ public class AgentChatActivity extends AppCompatActivity {
                     appendBotMessage(reply);
                     scrollToBottom();
                 } else {
-                    Toast.makeText(AgentChatActivity.this, "请求失败: " + response.message(), Toast.LENGTH_SHORT).show();
+                    String errMsg = getErrorMessage(response);
+                    Toast.makeText(AgentChatActivity.this, errMsg, Toast.LENGTH_LONG).show();
                 }
             }
 
             @Override
             public void onFailure(Call<ApiService.AgentChatResponse> call, Throwable t) {
                 binding.btnSend.setEnabled(true);
-                Toast.makeText(AgentChatActivity.this, "请求失败: " + t.getMessage(), Toast.LENGTH_SHORT).show();
+                String msg = t.getMessage();
+                if (msg == null || msg.isEmpty()) msg = "网络异常";
+                Toast.makeText(AgentChatActivity.this, "知你客服暂不可用: " + msg, Toast.LENGTH_LONG).show();
             }
         });
     }
 
+    /** 从 502/503 等错误响应中解析后端返回的 error 文案 */
+    private String getErrorMessage(Response<ApiService.AgentChatResponse> response) {
+        try {
+            if (response.errorBody() != null) {
+                String body = response.errorBody().string();
+                if (!body.isEmpty()) {
+                    JSONObject jo = new JSONObject(body);
+                    if (jo.has("error")) {
+                        return jo.optString("error", "知你客服暂不可用，请稍后重试");
+                    }
+                }
+            }
+        } catch (Exception ignored) { }
+        int code = response.code();
+        if (code == 502 || code == 503) {
+            return "知你客服暂不可用，请稍后重试";
+        }
+        return "请求失败: " + response.message();
+    }
+
     private void appendUserMessage(String content) {
         ApiService.Message m = new ApiService.Message();
         m.id = "local_u_" + System.currentTimeMillis();