一种可能的解决方法是确保UIAutomator2框架实例始终在同一个线程中使用。此外，您也可以尝试将函数的返回类型设置为布尔值，并在函数结束时返回true或false，以检查是否成功启动了UIAutomator2框架实例。以下是可能的代码示例：

public class SampleTest { private AndroidDriver driver; private UiAutomator2DriverLocalService uiAutomatorService;

@BeforeMethod
public void setup() {
    //启动Appium服务
    AppiumServiceBuilder builder = new AppiumServiceBuilder();
    AppiumDriverLocalService service = builder.build();
    service.start();

    //启动UIAutomator2服务
    uiAutomatorService = new UiAutomator2DriverLocalService.Builder().build();
    uiAutomatorService.start();

    //跨进程与设备建立链接
    DesiredCapabilities caps = new DesiredCapabilities();
    caps.setCapability("platformName", "Android");
    caps.setCapability("deviceName", "device");
    caps.setCapability("appPackage", "com.example.app");
    caps.setCapability("appActivity", "MainActivity");
    caps.setCapability("automationName", "UiAutomator2");
    driver = new AndroidDriver<>(service.getUrl(), caps);
}

@AfterMethod
public void teardown() {
    //关闭UIAutomator2服务
    if (uiAutomatorService != null) {
        uiAutomatorService.stop();
    }

    //关闭Appium服务
    if (driver != null) {
        driver.quit();
    }
}

@Test
public void testWithDirectMethod() {
    // 测试通过直接方法调用启动UIAutomator2服务
    UiObjectFinder.find("text").click();
    //测试逻辑
}

@Test
public void testWithFunctionCall() {
    // 测试在函数中调用启动UIAutomator2服务
    boolean isUiAutomatorStarted = startUiAutomatorService();
    Assert.assertTrue