refactor(proxy): 移除代理检查国家功能并优化 VPN 启动逻辑

- 删除了 ClashUtil 类中的 checkCountryIsUS 方法，移除了检查国家是否为美国的功能
- 修改了 LoadDeviceWorker 类中的 startProxyVpn 方法，去除了返回值，简化了逻辑- 优化了 executeSingleLogic 方法的流程，移除了与代理检查国家相关的代码

app/src/main/java/com/example/studyapp/proxy/ClashUtil.java

@@ -139,55 +139,4 @@ public class ClashUtil {
       System.out.println("Failed to switch proxy: " + e.getMessage());
     }
   }
-
-
-  public static boolean checkCountryIsUS() {
-    Request request = new Request.Builder()
-        .url("http://ipinfo.io/json")
-        .build();
-    OkHttpClient client = new OkHttpClient();
-    try (Response response = client.newCall(request).execute()) { // Synchronous call
-      if (!response.isSuccessful()) {
-        // Server returned an error
-        Log.e("ClashUtil", "OkHttp request unsuccessful: " + response.code());
-        // Consider how to handle this error synchronously.
-        // Maybe throw an exception or return a specific error indicator.
-        return false; // Or throw new IOException("Request failed with code " + response.code());
-      }
-
-      try (ResponseBody responseBody = response.body()) {
-        if (responseBody == null) {
-          Log.e("ClashUtil", "Response body is null");
-          return false; // Or throw new IOException("Response body is null");
-        }
-
-        String jsonData = responseBody.string();
-        JSONObject jsonObject = new JSONObject(jsonData);
-        String country = jsonObject.optString("country");
-        boolean isUS = "US".equalsIgnoreCase(country);
-
-        if (isUS) {
-          Log.i("ClashUtil", "Country is US. Full data: " + jsonData);
-        } else {
-          Log.i("ClashUtil", "Country is NOT US. It is: " + (country.isEmpty() ? "未知" : country) + ". Full data: " + jsonData);
-        }
-        return isUS;
-
-      } catch (JSONException e) {
-        Log.e("ClashUtil", "JSON parsing error: ", e);
-        // Consider re-throwing or returning an error indicator
-        return false;
-      } catch (IOException e) {
-        Log.e("ClashUtil", "IOException reading response body: ", e);
-        // Consider re-throwing or returning an error indicator
-        return false;
-      }
-    } catch (IOException e) {
-      // Network request failed
-      Log.e("ClashUtil", "OkHttp request failed: ", e);
-      // Consider re-throwing or returning an error indicator
-      return false;
-    }
-  }
-
 }

app/src/main/java/com/example/studyapp/worker/LoadDeviceWorker.java

@@ -64,9 +64,7 @@ public class LoadDeviceWorker extends CoroutineWorker {
 
     public void executeSingleLogic(Context context) {
         LogFileUtil.logAndWrite(Log.INFO, "MainActivity", "executeSingleLogic: Proxy not active, starting VPN",null);
-        if (!startProxyVpn(context)){
+        startProxyVpn(context);
-            return;
-        }
         LogFileUtil.logAndWrite(Log.INFO, "MainActivity", "executeSingleLogic: Changing device info",null);
         ChangeDeviceInfoUtil.changeDeviceInfo(context.getPackageName(), context);
         LogFileUtil.logAndWrite(Log.INFO, "MainActivity", "executeSingleLogic: Running AutoJs script",null);
@@ -74,11 +72,10 @@ public class LoadDeviceWorker extends CoroutineWorker {
         AutoJsUtil.runAutojsScript(context);
     }
 
-    private boolean startProxyVpn(Context context) {
+    private void startProxyVpn(Context context) {
         if (!isNetworkAvailable(context)) {
             Toast.makeText(context, "Network is not available", Toast.LENGTH_SHORT).show();
             LogFileUtil.logAndWrite(Log.ERROR, "MainActivity", "startProxyVpn: Network is not available.",null);
-            return false;
         }
 
 //        if (!(context instanceof Activity)) {
@@ -86,15 +83,12 @@ public class LoadDeviceWorker extends CoroutineWorker {
 //            LogFileUtil.logAndWrite(Log.ERROR, "MainActivity", "startProxyVpn: Context is not an Activity.",null);
 //            return;
 //        }
-
         try {
             ClashUtil.startProxy(context); // 在主线程中调用
             ClashUtil.switchProxyGroup("GLOBAL", "us", "http://127.0.0.1:6170");
-            return ClashUtil.checkCountryIsUS();
         } catch (Exception e) {
             LogFileUtil.logAndWrite(Log.ERROR, "MainActivity", "startProxyVpn: Failed to start VPN",e);
             Toast.makeText(context, "Failed to start VPN: " + (e.getMessage() != null ? e.getMessage() : "Unknown error"), Toast.LENGTH_SHORT).show();
-            return false;
         }
     }
 }